Cruise Report ONR Japan/East Sea

Hydrographic survey

R/V Professor Khromov KH38  28 February – March 17, 2000

 

Table of contents

A. Cruise narrative     

A.1 Highlights           

A.2 Cruise summary  

A.3 Narrative             

A.4 List of principal investigators      

A.5 List of cruise participants

B. Description of program and measurement techniques       

B.1 CTD (conductivity-temperature-depth)    

B.2 Salinity water sample analyses    

B.3 Oxygen water sample analyses    

B.4 Nutrient analyses

B.5 Alkalinity and pH analyses

B.6 Underway temperature, salinity, chlorophyll

B.7 Lowered Acoustic Doppler Current Profiling (LADCP)

B.8 Meteorology        

B.9 Navigation           

 

Appendix A: CTD data quality comments     

Appendix B: Station, rosette and bottle data quality comments

 


A. Cruise narrative

A.1 Highlights

 

Expedition: KH38, Legs 1 and 2

 

Chief scientists:

            Vyacheslav Lobanov

            Pacific Oceanological Institute, Far Eastern Branch Russian Academy of Sciences

            Vladivostok, Russia

            email: lobanov@poi.dvo.ru

 

            Lynne D. Talley

            Scripps Institution of Oceanography, UCSD

            La Jolla, CA

            email:  ltalley@ucsd.edu

 

Ship: R/V Professor Khromov, Captain I. Kiselev

Ports of Call:

            Pusan, Korea

            Otaru, Japan

 


A.2 Cruise summary

 

a. Cruise track (Fig. 1)

 

b. Station sampling

81 (Leg 1 – 10; Leg 2 – 71) CTD/24-bottle rosette stations with transmissometer and LADCP; sampling for temperature, salinity, oxygen, nitrate, phosphate, silicate, nitrite, ammonium, pH, alkalinity, CFCs.  (1691 bottles)

 

CTD station locations and times (WOCE Hydrographic Programme format)

 

KH38 Japan Sea           Professor Khromov        28 Feb 2000-17 Mar 2000  040700LDT

SHIP/CRS           CAST         UTC EVENT         POSITION         UNC HT ABOVE

EXPOCODE  STNNBR CASTNO TYPE DATE   TIME LATITUDE   LONGITUDE   DEPTH BOTTOM COMMENTS

-------------------------------------------------------------------------------------

 90CIKH38/2    1      1  ROS 022800 1615 35 49.70 N 129 51.20 E     0       6   CTD#5

 90CIKH38/2    2      1  ROS 022800 2130 35 51.30 N 130 33.50 E     0       7   CTD#5

 90CIKH38/2    3      1  ROS 022900  225 36  2.80 N 131  5.30 E     0       5   CTD#5

 90CIKH38/2    4      2  ROS 022900  709 36 28.90 N 131 13.30 E     0       7   CTD#5

 90CIKH38/2    5      1  ROS 022900 1154 36 30.00 N 130 36.90 E     0       6   CTD#5

 90CIKH38/2    6      1  ROS 022900 1610 36 30.00 N 130  2.90 E     0       6   CTD#5

 90CIKH38/2    7      1  ROS 022900 1821 36 29.60 N 129 50.40 E     0       4   CTD#5

 90CIKH38/2    8      1  ROS 022900 2246 37  3.20 N 129 55.80 E     0       3   CTD#5

 90CIKH38/2    9      1  ROS 030100  209 37  4.00 N 130 17.30 E  2204      99   CTD#1

 90CIKH38/2   10      1  ROS 030100  708 37  3.50 N 130 56.10 E  2214       5   CTD#5

 90CIKH38/2   11      1  ROS 030300  216 38 20.00 N 130  0.30 E   608       7   CTD#5

 90CIKH38/2   12      1  ROS 030300  546 38 40.00 N 130 22.10 E  2760       5   CTD#5

 90CIKH38/2   13      1  ROS 030300 1027 38 59.80 N 130 43.20 E  3093       6   CTD#5

 90CIKH38/2   14      1  ROS 030300 1505 39 17.10 N 131  2.00 E  3088       6   CTD#5

 90CIKH38/2   15      1  ROS 030300 2033 39 39.80 N 131 27.50 E  3082       5   CTD#5

 90CIKH38/2   16      1  ROS 030400   46 40  0.00 N 131 33.80 E  3056       5   CTD#5

 90CIKH38/2   17      1  ROS 030400  510 40 19.90 N 131 33.90 E  3313       4   CTD#5

 90CIKH38/2   18      1  ROS 030400  906 40 33.00 N 131 34.00 E  3324       5   CTD#5

 90CIKH38/2   19      1  ROS 030400 1254 40 44.50 N 131 35.40 E  3324       6   CTD#5

 90CIKH38/2   20      3  ROS 030500   23 40 58.60 N 131 33.40 E  3335       5   CTD#5

 90CIKH38/2   21      1  ROS 030500  447 40 51.90 N 131 57.30 E  3375       5   CTD#5

 90CIKH38/2   22      1  ROS 030500  858 40 45.30 N 132 20.50 E  3403       5   CTD#5

 90CIKH38/2   23      1  ROS 030500 1301 40 59.60 N 132 19.70 E  3422       5   CTD#5

 90CIKH38/2   24      1  ROS 030500 1703 41 15.00 N 132 23.10 E  3429       0   CTD#5

 90CIKH38/2   25      1  ROS 030500 2142 41 15.90 N 131 59.20 E  3389       6   CTD#5

 90CIKH38/2   26      1  ROS 030600  208 41 14.70 N 131 35.60 E  3342       5   CTD#5

 90CIKH38/2   27      1  ROS 030600  640 41 34.90 N 131 35.00 E  3310       4   CTD#5

 90CIKH38/2   28      1  ROS 030600 1912 42 32.80 N 131 35.70 E    73       5   CTD#5

 90CIKH38/2   28      2  ROS 030600 2009 42 32.10 N 131 37.40 E    78       7   CTD#5

 90CIKH38/2   29      1  ROS 030600 2315 42 27.30 N 131 36.60 E   124       7   CTD#5

 90CIKH38/2   30      1  ROS 030700  116 42 23.00 N 131 36.40 E   747      13   CTD#5

 90CIKH38/2   31      1  ROS 030700  532 42 21.20 N 131 36.40 E  1508      99   CTD#1

 90CIKH38/2   32      1  ROS 030700  900 42 13.30 N 131 33.00 E  2808      99   CTD#1

 90CIKH38/2   33      1  ROS 030700 1357 41 54.60 N 131 35.30 E  3137       6   CTD#1

 90CIKH38/2   34      1  ROS 030700 2209 41 50.20 N 132 41.50 E  3412      21   CTD#1

 90CIKH38/2   35      1  ROS 030800  445 42 14.20 N 132 45.00 E  3222       3   CTD#1

 90CIKH38/2   36      1  ROS 030800  819 42 20.80 N 132 43.20 E  2972      99   CTD#1

 90CIKH38/2   37      1  ROS 030800 1129 42 27.10 N 132 45.70 E  1608       4   CTD#1

 90CIKH38/2   38      1  ROS 030800 1328 42 28.90 N 132 45.30 E   913       2   CTD#1

 90CIKH38/2   39      2  ROS 030800 1556 42 32.90 N 132 46.00 E   133       6   CTD#1

 90CIKH38/2   40      1  ROS 030800 2200 42 40.10 N 134  0.40 E   286      99   CTD#1

 90CIKH38/2   41      1  ROS 030900 2356 42 35.40 N 134  0.50 E  1041      99   CTD#1

 90CIKH38/2   42      1  ROS 030900  214 42 30.00 N 134  0.00 E  2237       6   CTD#1

 90CIKH38/2   43      1  ROS 030900  544 42 19.90 N 134  2.10 E  3397       8   CTD#1

 90CIKH38/2   44      1  ROS 030900 1019 42  4.70 N 133 58.40 E  3460      99   CTD#1

 90CIKH38/2   45      1  ROS 030900 1447 41 50.00 N 133 59.70 E  3549       6   CTD#1

 90CIKH38/2   46      1  ROS 030900 1941 41 29.80 N 134  0.30 E  3545       5   CTD#1

 90CIKH38/2   47      1  ROS 031000 2359 41 14.50 N 134  2.20 E  3543       6   CTD#1

 90CIKH38/2   48      1  ROS 031000  412 40 59.90 N 134  0.00 E  3535       3   CTD#1

 90CIKH38/2   49      1  ROS 031000  900 40 46.00 N 134  2.40 E  3521       4   CTD#5

 90CIKH38/2   50      1  ROS 031000 1324 40 30.00 N 134  0.10 E  3149       3   CTD#5

 90CIKH38/2   51      1  ROS 031000 1646 40 20.00 N 133 59.80 E  2453       3   CTD#5

 90CIKH38/2   52      1  ROS 031000 1924 40 10.30 N 134  0.30 E  1167       5   CTD#5

 90CIKH38/2   53      1  ROS 031000 2133 40  0.50 N 134  0.20 E  1037       6   CTD#5

 90CIKH38/2   54      1  ROS 031100 2353 39 50.00 N 134  0.00 E   556       5   CTD#5

 90CIKH38/2   55      1  ROS 031100  443 40  6.10 N 134 50.50 E  1495       6   CTD#5

 90CIKH38/2   56      1  ROS 031100 1116 40 53.30 N 135 19.70 E  3300       4   CTD#5

 90CIKH38/2   57      1  ROS 031100 2005 41 40.10 N 136 19.70 E  3527       5   CTD#5

 90CIKH38/2   58      1  ROS 031200  124 42  9.80 N 136 20.00 E  3645       5   CTD#5

 90CIKH38/2   59      1  ROS 031200  642 42 35.10 N 136 19.80 E  3075       7   CTD#5

 90CIKH38/2   60      1  ROS 031200 1143 42 46.90 N 136  0.10 E  3630      69   CTD#5

 90CIKH38/2   61      1  ROS 031200 1841 42 57.60 N 135 39.30 E  3473      21   CTD#5

 90CIKH38/2   62      1  ROS 031300  101 43 10.40 N 135 19.80 E  3429       6   CTD#5

 90CIKH38/2   63      1  ROS 031300  402 43 14.40 N 135 14.80 E  1721       0   CTD#5

 90CIKH38/2   64      1  ROS 031300  537 43 16.90 N 135 10.40 E   266       4   CTD#5

 90CIKH38/2   65      2  ROS 031300 1701 43 59.90 N 137 59.60 E  2266       6   CTD#5

 90CIKH38/2   66      1  ROS 031400 2322 44 25.70 N 137 49.90 E  2407       5   CTD#5

 90CIKH38/2   67      1  ROS 031400  349 44 40.00 N 137 30.00 E  2006       5   CTD#5

 90CIKH38/2   68      1  ROS 031400  640 44 47.80 N 137 17.00 E  1587       6   CTD#5

 90CIKH38/2   69      1  ROS 031400  844 44 56.00 N 137  4.80 E   282       5   CTD#5

 90CIKH38/2   70      1  ROS 031400 1524 45 31.30 N 138 27.90 E  1769       5   CTD#5

 90CIKH38/2   71      2  ROS 031400 1939 45 49.20 N 137 59.80 E   163       4   CTD#5

 90CIKH38/2   72      1  ROS 031500   52 46 38.00 N 138 40.00 E   135       5   CTD#5

 90CIKH38/2   73      1  ROS 031500  209 46 33.00 N 138 50.00 E   471       5   CTD#5

 90CIKH38/2   74      1  ROS 031500  344 46 28.80 N 138 59.70 E  1157       4   CTD#5

 90CIKH38/2   75      1  ROS 031500  611 46 22.00 N 139 15.20 E  1539       5   CTD#5

 90CIKH38/2   76      1  ROS 031500  841 46 15.00 N 139 30.70 E  1724       4   CTD#5

 90CIKH38/2   77      1  ROS 031500 1200 46 12.00 N 139 59.90 E  1482       4   CTD#5

 90CIKH38/2   78      2  ROS 031500 1512 46  8.10 N 140 30.40 E  1234       3   CTD#5

 90CIKH38/2   79      1  ROS 031500 1818 46  5.00 N 141  0.00 E   596       6   CTD#5

 90CIKH38/2   80      1  ROS 031500 2027 46  2.90 N 141 21.40 E   166       5   CTD#5

 90CIKH38/2   81      1  ROS 031500 2157 46  1.00 N 141 36.50 E   101       6   CTD#5

 

c. Underway sampling

Meteorology

Surface temperature, salinity, fluorometry

 

d. Floats and drifters

1 K-SOLO optical drift profiler (Greg Mitchell, SIO).  The K-SOLO will acquire temperature and irradiance profiles at 5 m resolution in the upper 500 m.  The spectral channels for irradiance are at 412, 490 and 555 nm, corresponding to 3 of the channels on the SeaWiFS ocean color satellite.  Profiling every second day.

 

 

A.3 Narrative

A.3.a Introduction. The winter survey of the Japan/East Sea on the Professor Khromov (Figure 1) was designed to sample the anticipated regions of water mass transformation, and complements the summer cruises which covered the same region as well as the Japanese sector and Ulleung Basin.

 

A principal goal of the winter survey was to observe the maximum density and depth of winter ventilation. Two separate processes were hypothesized: open ocean convection and brine rejection through sea ice formation. Historical hydrographic data suggests that ventilation reaching the bottom (>3500 m) has not occurred since at least the 1930s. However, there is ample tracer evidence of ventilation to intermediate depth. Intermediate depth convection, as far as we know, had not been reported and possibly not observed.

The winter-time atmospheric pattern that is most important for convection is the cold air outbreaks in which cold Siberian air funnels past Vladivostok out across Peter the Great Bay and then southward out into the JES. Winter 99-00 was probably a season of especially strong cold air outbreaks. (A comparison with other years is underway.)

Sea ice forms in Tatar Strait, down along the Russian coastline, and in Peter the Great Bay (at Vladivostok). The sea ice extent in late February, 2000 at the start of the cruise is shown in Figure 2 from the National Ice Center (NOAA). The winter of 1999-2000 was a year for especially heavy ice, compared with the preceding three years, and anecdotally. A comparison with the historical record is underway. Since the ocean circulation is cyclonic north of the subpolar front, with the Liman current flowing southward along the Russian coast, it was expected to find outflow from the ice formation heading westward along the coast.

In the previous winter (April, 1999) a Russian cruise on the Gordienko (Lobanov, chief scientist) observed dense water in pockets on the shelf in Peter the Great Bay and down along the slope, suggesting flow down canyons on the shelf, turning westward.

A.3.b. Winter conditions prior to the Professor Khromov winter survey. Just prior to the winter,2000 survey, we assessed the most likely locations for convection. Vertical temperature and salinity profiles from the profiling floats were accessed from Steve Riser's webpage. Satellite AVHRR images were accessed from three sources: the Pacific Oceanological Institute in Vladivostok (Lobanov), Bob Arnone's webpage, and KORDI.

The floats profile to 800 meters depth. Two floats (numbers 230 and 262) of the total of about 38 showed nearly uniform properties to 800 m in February (Figure 3). Float 230 began record well-mixed water in mid-January, south of Peter the Great Bay. As it was advected southward, the profiles remained well mixed until the end of February. The actual numbers are not yet available to us, and so we cannot judge how well mixed the water was, but in February it appeared to be nearly uniform in temperature to the 800 m maximum depth of the profiles. Just at the beginning of March, the time of the Khromov survey, the JES warmed prematurely compared with previous years (based on satellite SST images); float 230 then began recording increasingly stratified water. Float 262, in the same region as 230, also showed nearly mixed water throughout February.

Two floats (258 and 223) in Tatar Strait (northern JES) also showed relatively mixed water in February, but did not show layers deeper than about 300 m (based on subjectively leafing through the profiles on the webpage).

SST images from the JES in February, 2000, ( Figure 4a from Bob Arnone at NRL) showed a large, warm, anticyclonic eddy centered at about 41N, 131E, with a diameter of about 100 km. Just east of the warm eddy was the location of the profiling floats showing well-mixed water. Surface temperatures in this region were cold, and contiguous with cold waters to the north. By the time of the hydrographic survey, the warm portion of the eddy had spread eastward, with an eastern edge around 132E ( Figure 4b also from Bob Arnone at NRL). This eddy is a common feature of this region.

Sea ice just at the start of the cruise (Figure 2) was at its maximum extent for the winter, and was at a somewhat greater extent than in the previous several years. A sudden warming occurred at the beginning of March, and by the next week, when the Khromov entered the ice-covered areas, most of the ice had melted; none was encountered.

A.3.c Winter cruise and evidence of ventilation. The Khromov sailed from Pusan, Korea on February 28, 2000, for a three day shakedown cruise of 10 stations in the Ulleung Basin, after which the American and Korean participants disembarked in Pusan. The Khromov then completed a 13-day survey of the central and northern JES, with 71 stations (Figure 1).  At each station, the CTD/transmissometer/24-bottle rosette package was deployed. An altimeter on the rosette frame allowed each station to be occupied to within 10 meters of the ocean bottom. Two separate rosettes were used on the cruise - a large package (24 10-liter bottles and CTD) deployed from the fantail, and a small package (24 1.7-liter bottles and CTD) deployed from the port side. The smaller package was used during rough weather (stations 31-48).

The weather was calm during the shakedown cruise. During the main cruise, very rough weather was encountered several times. Air temperatures dropped well below freezing, causing difficulties with rosette sampling at several stations, particularly since it was necessary to use the rosette with the small volume bottles at these stations.

Evidence of winter ventilation was obtained at three sites:
(1) intermediate depth (~1000 m) convection east of the warm eddy, at the location of the most well-mixed profiles observed by the floats in February and southernmost penetration of cold SST,
(2) mixing to 360 m in the northern Japan Sea,
(3) shelf water on the continental slope just south of Peter the Great Bay.
These are discussed sequentially in the next paragraphs.

(1) Intermediate depth open ocean convection was evident in oxygen, temperature and salinity profiles at four stations south of Vladivostok, near 41N, 132E (stations 18, 19 and 23). Station 23 (41 0'N, 132 20'E) showed the deepest penetration of oxygen saturation greater than 80% (Figure 5), suggesting that convection had reached to about 1040 dbar. A vertical section of oxygen along 131E, with a deviation through station 23, also shows the depth of this high oxygen layer (Figure 6). Despite the location of several stations in the region that was being sampled by the profiling floats 230 and 262, only this station showed penetration of high oxygen to greater than 800 m. The temperature and salinity structure at station 23 includes two separate layers that could have been well-mixed. Oxygen saturation at station 23 (and also adjoining stations 20 and 21) is quite low at the sea surface, at about 90%, and then relatively homogeneous below dropping to 80% only below 1100 m. The low surface saturations could be a signature of vigorous vertical mixing. The only other station in the survey with low surface oxygen was station 34, in the open sea south of Vladivostok.

The history of the profiling floats, the relatively low surface oxygen saturation, the depth of penetration of surface oxygen values, and the relative homogeneity of properties in two thick layers at station 23 suggest that convection occurred to about 1100 m depth in February in this region. The disappearance of coldest SST in this region at the end of February, and the lack of observation of truly homogeneous temperature/salinity, suggests that collapse of the homogeneous layer in the absence of continued forcing was very rapid, on the order of less than one or two weeks.

The implied maximum density of surface convection at station 23 is 27.329 sigma theta, 32.034 sigma 1, although the data are not yet well calibrated.

(2) In the northern Japan Sea, just east of the Liman Current and winter ice edge, a well-mixed surface layer of 360 m thickness was found (station 61 at 42 58'N, 135 39'E - Figure 7), with oxygen saturation greater than 90% ( Figure 5 ). This station was near the location of profiling floats that showed relatively uniform surface layers of about this depth in February. No other stations had mixed layers (in temperature) this deep although many stations in the region showed 200 m thick mixed layers.

Based on oxygen saturation, there is an axis of winter mixed layers of 250 to perhaps 400 meters thick just offshore of the 3000 meter isobath. Station 61 fits within this group, as does station 34 and 33, both of which showed relatively deep high oxygen layers. These depths differ considerably from the apparent deep overturn to 1100 m described in (1).

(3) High oxygen saturation is found on the bottom at two stations (30 and 31 - Figure 5) on the continental slope just south of Peter the Great Bay ( Figure 1b). The station depths were 600 and 1400 meters. The high oxygen subsurface layers were about 200-300 meters thick. These layers likely originate from the shelf based on similar observations in April, 1999. The oxygen layer at the deeper station is not highly saturated and in fact fits well with the curve of higher saturations from the intermediate convection stations. This leaves open the possibility that this ventilated water originates from offshore convection and that the vertical profile is a composite of older and newly-ventilated waters, with the newest water found at the bottom.

A.4 List of principal investigators

  1. Vyacheslav Lobanov (POI), Lynne Talley (SIO), Vladimir Ponamarev (POI), Igor Zhabin (POI), Alexander Nadashkovskiy (POI): Temperature, salinity, oxygen, nutrients (CTD and rosette)
  2. Nikolay Rykov (FERHRI), Lynne Talley (SIO) and Peter Hacker (UH): Lowered Acoustic Doppler Current Profiling
  3. Pavel Tishchenko (POI): Alkalinity, pH
  4. Kyung-Ryul Kim (SNU): Underway T/S/chlorophyll
  5. Greg Mitchell (SIO): optical profiling float
  6. Igor Filippov (FERHRI) and Robert Beardsley (WHOI): meteorology

 

A.5 List of cruise participants

 

Leg 1 only

Lynne Talley (SIO) - Chief scientist

Carl Mattson (SIO/ODF) -  Electronics/Deck watch

Doug Masten (SIO/ODF) - Nutrient analyst/data processing

Bob Williams (SIO/ODF) - Oxygen/Bottle data

Scott Hiller (SIO/ODF) -  Electronics/Deck watch

Dong-Jin Kang (SNU) - underway chemistry, CO2 (pH by spectro.)

Doshik Hahm (SNU) - CO2 (pH by spectro.)

 

Leg 2 only

Vyacheslav Lobanov (POI) – Chief scientist

 

Legs 1 and 2

Alexey Sherbinin (FERHRI) Technician in charge

Sergey Yaroshev (FERHRI) Deck

Mikhail Danchenkov (FERHRI) Float deployment

I. Filippov (FERHRI) Meteorology

K. Zhevrov (FERHRI) Salinity

A. Sevastyarov (FERHRI) PLT

Anatoly Lemecha (FERHRI) Deck

Alexander Nedashkovskiy (POI) -  Nutrients

Sergey Sagalaev (POI) - Oxygen

Michael Gorelkin (FERHRI) -  Salinity

Igor Titov (FERHRI)  - Electronics, Deck watch

Vladimir Luchin (FERHRI) -  CTD/rosette operations, CTD console

Nikolay Rykov (FERHRI) -  CTD/rosette operations

Vladimir Kraynev (FERHRI) - CTD/rosette operations

Igor Zhabin (POI) -  CTD/hydrographic data management, software, processing,Deck

Vladimir Ponamarev (POI)- CTD/hydrographic data management, software, processing

Pavel Tischenko (POI) - POI chemistry head, CO2 (pH by EMF)

Ruslan Chichkin (POI) - CO2 (pH by EMF)

Elena Ilyina (POI) - CO2 (Alkalinity)

Maria Shvetsova (POI) -  CO2 (Alkalinity)

Sergei Zakharkov (POI) - Bio-optics

Andrey Shcherbina (SIO) LADCP

Galina Pavlova (POI) CO2

Galina Volkova (POI) CO2

Olga Shevtsova (POI) Co2

Yuri Shulga (POI) Co2

A Kalyagin (POI) noble gases

 

Institution acronyms

 

B. Description of program and measurement techniques

B.1 CTD (conductivity-temperature-depth):

 

B.1.a Shipboard configurations: Carl Mattson (SIO/ODF)

CTD data were recorded on IBM PC's.  Digital backups on CDROMS and Zip disks.  Analog backups on VCR cassettes.

 

CTDs used:     

            NBIS Model MKIII   ODF CTD#1 sta 9 (leg 1), stations 31-48 (leg 2)

            NBIS Model MKIII   ODF CTD#5 sta 1-8,10 (leg 1), stations 11-30, 49-81 (leg 2)

 

Large Rosette (24-place, 10 liter bottles): Stations 1-8, 10-30, 49-81.

 

CTD#5: CTD #5 has dual temperature/conductivity sensors mounted on twin turrets - two identical temperature channels and two identical conductivity channels.  CTD sensors were soaked in distilled water between all casts.  The T1C1 pair of sensors was used for shipboard processing.  The T2C2 pair was used for final processing (section B.1.b below).

 

Bottles: 10L Bullister style SIO manufactured.  Bottles serial numbered 1-24 corresponded to the pylon tripping sequence 1-24 with the first bottle tripped being bottle #1.  Bottles serial numbered 1-24 were used on all casts.

 

Oxygen and transmissometer were interfaced with the CTD and incorporated into the CTD data stream.

 

No reversing thermometers, no pinger.

 

Small Rosette (24-place, 2.7 liter bottles): Stations 9, 31-48.

 

CTD sensors were soaked in distilled water between all casts.

 

Bottles: 2.7L Bullister style SIO manufactured.  Bottles serial numbered 1-24 were tripped in sequence.  The pylon was a SBE32 36 place model so certain pylon positions were skipped. This was done automatically by the acquisition program and tripped in the following order.

        01 02 04 05 06 08 10 11 13 14

        16 17 19 20 22 23 25 26 28 29

        31 32 34 35

 

Oxygen data were interfaced with the CTD and incorporated into the CTD data stream.

 

No reversing thermometers, no transmissometer, no LADCP, no pinger.

 

Winches:  The CTD winch had a 9mm single conductor EM cable with approx 4500M of wire at beginning of cruise.

 

B.1.b CTD final calibrations: Mary Johnson (SIO/ODF) (10 June 2005)

 

General comments: These KH38 CTD data are final.  All interpolated/extrapolated data are quality-coded 6 and documented in "kh38CTD_Cmmts" (Appendix A).  Oxygen corrections are from a preliminary pass over the data and fits have not been optimized.  CTD oxygen data have been included as a courtesy: they are reported and coded 1 (uncalibrated), or NOT reported and coded 5 (for casts where there was a known problem with the sensor, noted in "kh38CTD_Cmmts" in Appendix A).

 

Despiked/offset or interpolated/extrapolated data are quality coded 7 or 6, respectively, in the data files.  A preliminary WOCE ".sum" file was generated from a positions file that came off the ship with the data.  No further checking/editing was done, other than to add the "HT ABOVE BOTTOM" values that were already machine-readable.

 

CTD-1 was used for the stations 9 and 31-48.  CTD-5 (with dual T/C sensors) was used for the remainder of the stations 1-81.  Downcast data were used for all but 9 casts for final pressure-series data; exceptions are noted in the file "kh38CTD_Cmmts" (Appendix B).

 

The CTD-5 secondary T/C sensors were used as the "better" pair; both sensor pairs had problems with noise and offsets.  There was only one conductivity sensor on CTD-1, so the primary T/C sensors were used for those data.  Calibrated pressure-series CTD data appear to be consistent from cast-to-cast, on overlays of deep theta-salinity profiles plus surface salinity and sigma theta plots vs. pressure. Most bottle salinity data are fairly well centered over the CTD data on the deep theta-salinity plots.  A few bottle salinity values need to be quality-coded 3; they were ignored while determining final CTD conductivity corrections.

 

Calibration specifics:

CTD#5 (stations 1-8, 10-30, 49-81)

Pressure Sensor s/n 77017 (Paine):

          P Calibs:

                Jan. 2000 -   0.14/15.25 deg.C bath to 6080/1191 db

                Apr. 2000 -  -1.32/16.61 deg.C bath to 6080/1191 db

          cold cal: shifted +0.1(dn),+0.25(up)/+0.3-.4/+0.5 db 0db/mid-range/4000db

                from pre- to post-cruise calibration

          warm cal: shifted -0.5-.4/-0.3-0/+0.2 top 1000db/mid-range/bottom

Correction used:  average pre-/post-cruise cold calibrations and warm calibrations (pre-cruise significantly smoother, but slope changed).

 

Temperature Sensor s/n 17534 (Rosemount PRT) ("T2"):

          T Calibs: Jan. 2000/Apr. 2000

            +0.0029/+0.0017/+0.0014/+0.0023  at -1.5/3.5/8.5/15.5 deg.C

                from pre- to post-cruise calibration

Correction used:  equally weighted Jan. + Apr. 2000 Tcals (same #pts at each level, same # of levels) - then averaged, calculated second-order fit of differences to raw T.  (Not possible to tell when +0.0015 to +0.003 deg.C correction shift occurred; averaging two calibrations should put all temperature values within +/-0.0015 deg.C error range.)

 

Conductivity Sensor s/n O24 (GO) ("C2"):

          Calibrated to bottle salts taken during cruise.

1. Checked dC(C) fits for all bottle differences/all CTD-5 stations together; determined first-order dC(C) fit worked best to optimize corrections for deeper data points.  Some cast-to-cast shifts noted, as well as a few stations with more "flyer" differences than others.  The first few stations (CTD-5) had much larger CTD offsets from cast to cast on deep theta-salinity plots using the same conductivity slope/offset for all casts.  Deep bottle data were fairly consistent for these same early casts.

 

2. First-order dC(C) fits with a (4,2) std.dev. rejection were generated for each cast from Bottle-CTD Cond. differences, then the slopes were compared (disregarding any offset differences).  Stations with a conductivity range < 2 mS/cm or with a disproportionate number of "flyers" in high-gradient areas were omitted for the next step.

 

3. The slopes from step 2 were smoothed in 2 groups: a first-order fit through the slopes for stations 1-30 , as a function of station number (time), was determined, then applied as smoothed/slowly decreasing dC(C) slopes for stations 1-20.  The slopes seemed to stabilize at that point (perhaps because the conductivity range within each cast decreased substantially by station 20). An average of the slopes for stations 17-79 was determined and applied to conductivities for stations 21-81.  The two sets of slopes transitioned quite smoothly at stations 20/21.

 

4. Residual conductivity offsets from step 3 were calculated for data deeper than 250db.  Smoothed offsets were determined in two groups (as expected, since the slopes were two groups). A second-order fit of residual conductivity offsets deeper than 250db, as a function of station number (time), was determined for stations 1-21 and applied to stations 1-20. This pulled the earlier stations in much better than a first-order fit would have, and matched up well with the next group. A first-order fit of residual 250db+ conductivity offsets, as a function of station number (time), was determined using stations 21-23 and 49-79 (minus two casts outside the (4,2) std.dev. rejection range).  The smoothed offsets were then applied to stations 21-30 and 49-81.

 

5. Offsets were then manually adjusted from the smoothed values based on deep theta-salinity consistency.  Several Autosal runs were disregarded because of standardization issues caused by instrument problems and drifts, especially on earlier stations.

 

6. A small residual pressure-dependent slope was apparent at this point.  First- and second-order dC(P) fits for all residual conductivity differences, with (4,2) std.dev. rejections applied, were compared.  The two fits were similar, but the second-order fit was used because it had less effect on the deep data while pulling in the surface data about the same amount.  The dC(P**2) and dC(C) coefficients were both used, combining the two offsets.

 

CTD#1 (stations 9, 31-48):

 

Pressure Sensor s/n 130538 (Paine):

          P Calibs:

                Jan. 2000 -  -1.47/0.13/15.66 deg.C bath to 6080/1191 db

                Apr. 2000 -  -1.33/16.60      deg.C bath to 6080/1191 db

             first Jan. cold calib disregarded: CTD repaired between 2 cold cals

                (very different slope/offset than next calibration done)

          cold cals: shifted -0.1/0/+0.2 db top 1000db/mid-range/3000db-btm +

                upcast from pre- to post-cruise calibration

          warm cals: shifted maximum +0.2 db from pre- to post-cruise calibration

Correction used:  average pre-/post-cruise cold calibs and warm calibs (omitted noisy data where 200psi weight removed on Apr. cold upcast)

 

Temperature Sensor s/n 13661 (Rosemount PRT):

          T Calibs: Jan. 2000/Apr. 2000

            +0.0006 at -1.5 deg.C, +0.00045 at 5.0 deg.C and +0.0013 at 16.0 deg.C

Correction used:  equally weighted Jan. + Apr. 2000 Tcals (same #pts at each level, same # of levels) - then averaged, calculated second-order fit of differences to rawT

         

Conductivity Sensor s/n F143 (NBIS):

          Calibrated to bottle salts taken during cruise.

NOTE: This sensor had a small + Conductivity drift with time during its first cast (station 9).  The drift seemed to have stabilized by the bottom of the downcast.  Since the downcast data clearly required a different correction, the upcast was used for pressure-sequencing to get a better-calibrated cast.

 

1. Checked dC(C) fits for all bottle differences/all CTD-1 stations together; determined first-order dC(C) fit worked best to optimize corrections for deeper data points.  Some cast-to-cast shifts were noted, especially station 9 being substantially lower than the rest.

 

2. First-order dC(C) fits with a (4,2) std.dev. rejection were generated for each cast from Bottle-CTD Cond. differences, and the resulting slopes were compared (disregarding any offset differences).  The slopes were smoothed in 1 group with a first-order fit through the slopes for stations 9 and 31-48, as a function of station number (time), minus a few very shallow casts or casts with several "flyers" in gradient areas.  Smoothed/slowly decreasing dC(C) slopes were applied to stations 9 and 31-48.

 

3. Residual conductivity offsets from step 2 were calculated for data deeper than 250db.  Smoothed offsets were determined in one group: a first-order fit of residual 250db+ conductivity offsets for stations 34-48 (minus shallower stations 38-40) was determined, then applied to stations 31-48.  Station 9 was offset separately, not surprising because of its drifting problem on the downcast.

 

4. Offsets were then manually adjusted from the smoothed values based on deep theta-salinity consistency.  Stations 31-33 needed a bigger adjustment than most, probably due to the long period of non-use between stas 9 and 31.  More than a typical amount of fine-tuning was needed for these casts, where the CTD was subjected to some exceptionally cold temperatures and more than its share of frozen sensor issues.

 

5. The residual offsets were checked for any pressure-dependent correction, and none was warranted.

 

Both CTDs together - final conductivity calibration checks:

 

Deep Theta-Salinity overlays of 8 consecutive casts, as well as non-consecutive stations in close proximity to each other based on position and/or depth, were checked for consistency. Data were also checked against deep areas of KH36 casts at the same positions (from a July-August 1999, in a warmer season), and a few more small offset adjustments were made. KH38 deep data lie within 0 to +0.001 mS/cm of KH36 deep data at similar station positions throughout the cruise area.

 

In Jan. 2005, Young-Gyu Park (khoh@kordi.re.kr) emailed concerns about a large (0.007 PSU) difference between J04 and J07 deep salinity data.  He sent theta-salinity plots of J04 data and preliminary J07 data he had acquired from Lynne Talley's website.  After finalizing conductivity corrections, KH38 data (aka J07), stations 1-10, were re-checked against the J04 plot: the inconsistencies have disappeared, and the deep theta-salinity data now agree to within 0.001 PSU.

               

CTD Oxygen data:

Preliminary automated fits from 2002 were applied to the data; no individual attention was given to resolve specific fitting problems.  The CTD oxygen data were reported as "uncalibrated" in the final WOCE-format CTD data files. An attempt was made to determine where the sensors had failed; these CTD oxygen data were not reported. (Exception: a few casts' fits were SO bad that huge negative oxygen values appeared in the data files and caused a problem in file checking/generation.  Corrections from a nearby cast were used instead to bring these data into the ballpark; these casts are documented in kh38CTD_Cmmts, Appendix B.)

 

CTD Transmissometer data:

 

Time-series data files with preliminary block-averaged data, including both transmissometers, were given electronically to Margaret Stramska (USC and UCSD email addresses) in Nov. 2002.  They were not further processed by ODF, and are not included with this data set.

 

B.2 Salinity water sample analyses: Carl Mattson (SIO/ODF)

Salinometer types                    Serial numbers            Stations           Bath temperature

Guidline 8400A Autosal         57-396                         6-81                 24íC

Guidline 8400A Autosal         48-263                         1-4                   24íC

 

Standard seawater:  Batch  P-134

 

The autosals were configured for computer-aided measurement. The data was acquired on a PC during analysis.

 

On station 5 there was a problem with the Autosal.  Complete comments on the quality of individual salinity water samples are given in Appendix B.

 

B.3 Oxygen water sample analyses: Carl Mattson (SIO/ODF)

Oxygen water samples were run on all stations using a Dosimat UV-endpoint detection automatic titration system.  The titrator employed a Brinkman Dosimat 665 automatic burette and an Ultraviolet detection system interfaced with a PC for data acquisition and control.

 

Comments on the quality of individual oxygen water samples are given in Appendix B.

 

B.4 Nutrient analyses: Carl Mattson (SIO/ODF)

Nutrients were run on all stations using a Technicon AA-II CFA system with a PC based acquisition system. Nutrients measured - NO2, NO3, PO4, SIO3 and also ammonium.  The system performed well with few problems. Data was reviewed by analysts and transferred to the processing computer for integration with  other water sample data.

 

Comments on the quality of individual oxygen water samples are given in Appendix B.

 

B.5 Alkalinity and pH analyses: Pavel Tishchenko (POI)

Samples were collected and analyzed for pH and alkalinity from every station.  Methods are described in the cruise reports from the R/V Revelle (HNRO7) (website http://sam.ucsd.edu/onr_data/j04/hnro7_revelle_report.htm) and R/V Professor Khromov (KH36) (website http://sam.ucsd.edu/onr_data/j05/kh36_khromov_report.htm), both conducted in summer 1999 as part of the same project.

 

Comments on the quality of individual water samples are given in Appendix B.

 


B.6 Underway temperature, salinity, chlorophyll: Dong-Jin Kang and Doshik Hahm (SNU)

Salinity, temperature, and chlorophyll fluorescence were measured every minute.  the thermosalinograph was a with Seabird (SBE 21) with two temperature sensors and conductivity sensor, all calibrated in late April 1999.  Fluorometry was measured with a Wet Labs WETStar fluorometer, calibrated June 5, 1999.  GPS navigation was recorded every minute.

 

B.7 Lowered Acoustic Doppler Current Profiling (LADCP): Lynne Talley (SIO) and Peter Hacker (U. Hawaii)

A 150 KHz RD Instruments acoustic doppler current profiler was integrated with the large CTD/rosette package. The LADCP makes direct current measurements at the depth of the CTD, thus providing a full profile of velocity. The LADCP was used at every station with the large rosette package (Stations 1-8, 10-30, 49-81).  The shipboard data acquisition system for the LADCP permits data acquisition on a laptop PC and very preliminary processing on a small Sparc workstation.

 

B.8 Meteorology: Robert Beardsley and Richard Limeburner (WHOI)

Overall information about the shipboard meteorological measurements for the Japan Sea cruises is available on the website http://www.whoi.edu/science/PO/japan_sea.  The complete report for KH38 is on the website http://www.whoi.edu/science/PO/japan_sea/japan2000khromovcrpt/crurptkhromov00.htm.

The following two paragraphs are taken from the introduction to that report.

 

"The objectives of the meteorological component of the 2000 winter hydrographic cruise on the R/V Professor Khromov to the Sea of Japan were to make high quality shipboard measurements of wind speed and direction, barometric pressure, relative humidity, air temperature, sea surface temperature, short wave radiation, long wave radiation and precipitation.

 

The meteorological equipment was shipped to Korea in January 2000 and the instruments were then mounted on the Russian ship in Pusan. This report describes the instruments used during the cruise and the data collected. R. Limeburner from WHOI installed the meteorological instruments on the ship in Pusan, Korea and Alexey Sherebinin and Igor Filippov from the Far Eastern Regional Hydromet Research Institute, Vladivostok assisted in the installation."

 

B.9 Navigation: Robert Beardsley and Richard Limeburner (WHOI)

GPS data were collected by Woods Hole Oceanographic Institution (Beardsley and Limeburner) at 10 minute intervals for the entire cruise.  See the report linked in B.8 for information and data.

 


Appendix A: CTD data quality comments (M. C. Johnson SIO/ODF)

 

kh38CTD_Cmmts (Mary C. Johnson, June 2005)

## Comments, (console logs, winch stops (2 mins. or longer), yoyos over 10db, etc.)

     

      * pressure-series starts from top of (last) yoyo to surface

     

      sta/cst Comment

     

      004/01  apparently ABORTED: cast started "with oxygen cup" - cast not reported

      004/02  noisy ctdoxy data vs stas 3/5 (perhaps oxy sensor cover still not removed?)

      004/02    7-min. stop at 76 - 80 db

 

      009/01  small rosette/ctd-1; first use ctd-1, large C drift, especially on downcast: use up

 

      020/01  apparently ABORTED: no console log  - cast not reported

      020/02  apparently ABORTED: no console log  - cast not reported

      020/03  cast started in-water at 3db

 

      028/01  wind 17 m/sec; all bottles open due to freezing; DU confirmed ok; unstable surface

      028/01    -0.008 PSU top 22db and no 0-2db, suspect partially frozen start of down: use up

      028/02  cast 2 after rosette warmed up/checked; frozen sensors at start, no usable 0-4db

      028/02    down: use up; wind 17-19 m/sec; 4.5-mins. at 0 - 16 db (up)

 

      029/01  wind 17.5 m/sec; frozen sensors at start: 18db yoyo (20.5db back to surface down),

      029/01    still see instabilities second time down: use up

 

      030/01  wind 19.2-20 m/sec

 

      031/01  strong wind (18-19 m/sec) and waves: Change to small rosette/ctd-1; data file incomplete:

      031/01    cast replayed from tape, but tape apparently jammed at cast start, lost top 52db (down)

 

      032/01  rawP jump going in/fast, perhaps slightly frozen, but ok before starts down.

 

      033/01  27db yoyo (818.5db back to 791.5db down, 2-min. delay)

 

      034/01  used full cable length (? not sure of writing); wind 14.9 m/sec; cast started in-water

      034/01    at 2db in, noise and dropouts; frozen P sensor, prs bad 25-132db down: use up;

      034/01    up has a few 7-sec. gaps

      034/01    2.5-min. stop at 2 - 6 db (up)

 

      039/01  apparently ABORTED: "trouble [with] pressure sensor"

      039/02  2 yoyos back to surface (from 31.7db, then 88.8db down)*; trips on last/full upcast

 

      040/01  3.5-min. stop at 0 - 4 db

 

      041/01  wind 11.9 m/sec

 

      042/01  wind 10.1 m/sec;

 

      043/01  wind 12.7 m/sec; frozen P sensor, pressure bad 96-190db down: use up

 

      044/01  13.5db/14db yoyos (1712.0db back to 1725.6db up/1169.6db back to 1183.8db up);

      044/01    frozen P sensor, pressure bad 35-84db down: use up

 

      046/01  wind 11.8 m/sec; frozen P sensor, pressure bad 26-110db down: use up

 

      047/01  wind 12.2 m/sec; 9.5-min. stop at 0 - 6 db/surface

 

      048/01  wind 6.8 m/sec; 8-min. stop at 0 - 6 db/surface

 

      049/01  back to large rosette/ctd-5; 30.5-min. stop at 548 - 554 db

 

      052/01  cast started in-water at 17db; 14db yoyo (17.8db back to 3.7db down)*

 

      053/01  wind 2.8; Yamato Rise, station between two mounts

 

      054/01  wind 1.9; top of Yamato Rise

 

      055/01  wind 4.9 m/sec; center of eddy; "set time at the GPS PC"

 

      057/01  cast started in-water at 7db, back to surface before starting down

 

      059/01  ctdoxy sensor replaced before cast; 13db yoyo (16.6db back to 3.8db down)*

 

      060/01  wind 18 to 10.5 m/sec; cable length too short to reach btm layer;

      060/01    (wire angle?) consisted of 45-50 degrees; cable 'deformation'

      060/01    due to strong wind and current near the Bosorov Rise

 

      061/01  50m cable cut off prior to sta 61 due to cable deformation on sta 60;

      061/01    full cable length used due to strong wind drift: wind 12.3 -14.6 m/sec;

      061/01    R/V drift approx. 6m(iles?)

 

      062/01  wind 8 m/sec; Pressure sensor "did not work fine on deck (freezing?)"; frozen

      062/01    C sensor at surface, yoyo to thaw: 17db yoyo (21.8db back to 4.5db down)*

 

      063/01  echosounder depths noisy, did not go near bottom over rough/strong canyon slope

 

      065/01  apparently ABORTED: no console log - cast not reported

      065/02  (big Russian word, then "at 06502"); 82-sec gap in raw data at 4db

 

      066/01  wind 12.5 m/sec

 

      067/01  wind 7.5 m/sec

 

      070/01  14.5db yoyo (1533.9db back to 1519.4db down, 5-min. delay)

 

      071/01  apparently ABORTED; wind 10.5 m/sec; P, C, ctdoxy sensors did not work due to

      071/01    freezing, T sensors show above freezing - incorrect; rosette brought back

      071/01    aboard and warmed with warm water before c.2

      071/02  wind 10.5 m/sec

 

      073/01  wind 0.8 m/sec

 

      075/01  wind 5 m/sec

 

      078/01  apparently ABORTED: "there are [not] any data in cast 1" - cast not reported

 

      079/01  wind 2.2 m/sec

 

      080/01  wind 7.4 m/sec

 

      081/01  cast started in-water at 3db

     

     

   ## Upcasts used for pressure-sequencing:

     

      sta/cst Reason for using upcast data

     

      009/01  Conductivity drift on downcast, settled out by cast bottom.

      028/01  Frozen T/C sensor problems on downcast

      028/02  Frozen T/C sensor problems on downcast

      029/01  Frozen T/C sensor problems on downcast

      031/01  Top 52db of downcast data missing from raw data file and backup tape

      034/01  Frozen P sensor, pressure appears to stabilize 132db down

      043/01  Frozen P sensor, pressure appears to stabilize 190db down

      044/01  Frozen P sensor, pressure appears to stabilize 84db down

      046/01  Frozen P sensor, pressure appears to stabilize 110db down

     

     

   ## Pressure levels interpolated (missing data, or omitted instabilities at surface):

           (total 61 levels interpolated in 50/82 casts)

     

      sta/cst pressures                        sta/cst pressures

     

      004/02  0 db                      048/01  0-2,154,444 db

      008/01  0 db                      049/01  0 db

      017/01  0 db                      050/01  0 db

      019/01  0 db                      052/01  0-2 db

      021/01  0 db                      056/01  0 db

      023/01  0 db                      057/01  0 db

      024/01  0 db                      059/01  0-2 db

      025/01  0 db                      061/01  0 db

      026/01  0 db                      062/01  0-2 db

      027/01  0 db                      063/01  0 db

      029/01  0 db                      064/01  0 db

      030/01  0 db                      065/02  0 db

      033/01  0 db                      067/01  0 db

      034/01  3110-3112 db              069/01  0 db

      035/01  0 db                      071/02  0 db

      036/01  0 db                      072/01  0 db

      037/01  0-2 db                    073/01  0 db

      038/01  0 db                      074/01  0 db

      039/02  0 db                      075/01  0 db

      040/01  0-2 db                    076/01  0 db

      041/01  0 db                      077/01  0 db

      042/01  0-2 db                    078/02  0 db

      044/01  0 db                      079/01  0 db

      045/01  0 db                      080/01  0 db

      047/01  0,316 db                  081/01  0 db

     

     

   ## large Conductivity (Salinity) despiked/offset segments

     

      Several large segments of salinity data were affected by

      conductivity sensor fouling and were offset before finalizing

      corrections.  The largest segments (most consecutive pressure

      intervals) affected are listed below, with the approximate

      offsets used to shift them back to match nearby data.  More

      nearby levels may have also been despiked to

     

      sta/cst CTD Pressures Salin.Offset

     

      012/01  2064 - 2746db +0.0005 (to bottom)

      015/01  2332 - 2350db +0.0015

      019/01  2124 - 2136db +0.012 to +0.013

      019/01  2138 - 2146db +0.001 to +0.002

      020/03  2822 - 2832db +0.002

      024/01     0 -  708db -0.004

      024/01  708 -  740db (despike area between offsets)

      024/01  740 -  746db +0.003

      024/01  748 -  758db +0.0005

      036/01  172 -  418db +0.002

      044/01     0 - 1754db +0.001 to +0.002 (upcast)

      044/01  1766 - 1792db +0.001

      044/01  1804 - 1820db +0.0025

      045/01  1626 - 1704db +0.001

      046/01  1832 - 1844db +0.001

      049/01  2708 - 2716db +0.002

      050/01  1044 - 1058db +0.002

      062/01  1522 - 1546db +0.0005

      066/01  1670 - 1718db +0.002

      074/01     0 -  602db -0.001

      077/01  436 -  490db +0.247 to +0.254

           

   ## possible equilibration or freezing problems:

     

      The following 4 casts recorded unrealistic (high) temperatures, followed

      by rapid drops to near-freezing temperatures, before the cast went in

      the water.  This was likely caused by (too-)warm water being poured over

      the sensors because of freezing problems.  It's possible this can distort

      some temperature-related lags applied to the CTD data (because the

      internal CTD temperature at power-up was assumed to also be this warm).

       (Quote from station 71 cast 1 console log: "It is necessary to use

       warm house for CTD and rosette under cold winter condition.  It

       will be better for sensors and sampling.")

     

      sta/cst possible equilibration issue

     

      028/01  pre-cast T starts at 25.8 deg.C, rapidly drops to -3.0 deg.C; 5 mins.

        at -3 to 0 deg.C before going in water (surface T -0.1 deg.C)

      030/01  pre-cast T starts at 14.9 deg.C, rapidly drops to -3.2 deg.C; 2 mins.

        at -3 to 0 deg.C before going in water (surface T -1.0 deg.C)

      072/01  pre-cast T topped-out/above 31.3 deg.C several seconds, then rapidly

        drops to 4.5 deg.C just before going in (surface T -0.33 deg.C)

      073/01  pre-cast T topped out at 31.3 for 15 seconds, then rapidly

        drops to 10.9 deg.C just before going in (surface T 1.5 deg.C)

     

      The lowest pre-cast (out-of-water) temperatures are listed below for any

      cast with below-freezing (corrected) air temperatures.  There is potential

      for sensor freezing problems, especially in the near-surface data.  Known

      problems have been fixed where possible by using a later start-time for

      pressure-sequencing, thereby bypassing data affected by freezing, or using

      upcasts when the effect went too deep on the downcast.  (Stations 72/73

      off-scale high temperatures were also noted here, as well as casts where

      data files started in-water in areas likely to have had freezing problems.)

 

      Freezing can/probably did affect every CTD sensor (including oxygen and

      transmissometers) at some point during this cruise.

     

       pre-cast                         pre-cast

      sta/cst min. Temp.               sta/cst  min. Temp.

     

      022/01  -0.5525                  048/01   -2.6476

      023/01  -0.4244                  056/01   -0.4209

      028/01  -3.0342                  057/01 (starts in-water)

      028/02  -6.1325                  058/01   -0.0101

      029/01  -5.5658                  060/01   -0.3682

      030/01  -3.1880                  061/01   -4.9496

      031/01 (starts in-water)                 062/01   -5.9051

      032/01  -3.8577                  063/01   -3.1086

      033/01  -5.5239                  064/01   -3.2502

      034/01 (starts in-water)                 065/02   -4.1711

      035/01  -5.8765                  066/01   -4.1904

      036/01  -5.0503                  067/01   -3.6343

      037/01  -5.6170                  069/01   -1.2976

      038/01  -5.0917                  070/01   -2.5099

      039/02  -7.5768                  071/02   -1.4948

      040/01  -9.6729                  072/01 (O/S high T)

      041/01  -10.3604                  073/01 (O/S high T)

      042/01  -9.6942                  074/01   -1.5064

      043/01  -7.8414                  075/01   -1.1550

      044/01  -6.3074                  076/01   -2.4055

      045/01  -5.6152                  077/01   -2.0856

      046/01  -5.5009                  078/02   -1.4280

      047/01  -3.6713                  079/01   -1.8981

 

   ## Oxygen data not reported: malfunctioning sensor

     

      sta/cst                           sta/cst                            

     

      040/01                            076/01

      041/01                            077/01

      042/01                            078/02

      043/01                            079/01

      044/01                            080/01

      045/01                           

      046/01                           

      047/01                           

      048/01                           

 

  ## nearby cast's oxygen corrections used instead of default (to avoid problems in data file):

 

      sta/cst Corrxns used              sta/cst   Corrxns used

                                 

      021/01  022/01                    050/01    051/01

      027/01  026/01                    053/01    052/01

      036/01  037/01                    054/01    051/01

      038/01  037/01                    055/01    051/01

      039/02  037/01                   

 

Appendix B:  Station, rosette and bottle data quality comments (I. Zhabin)

 

KH38 quality comments - console log sheets, sample log sheets, bottle sample log book, salt, oxygen, nutrients analysis logs. (Compiled by I. Zhabin at sea on the Khromov)

 

Codes:

qflg = 4  bad value

qflg = 3  suspicious value

qflg = 2  good value

 

Leg 1 (test cruise):

 

Station 001 01

CTD 5, big Rosette

Surface samples for CO2 group in line bottle 25.

DLOG - bottle 23 too high (qflg=4).

 

Station 002 01

CTD 5, big Rosette.

Surface samples for CO2 group in line bottle 25.

 

Station 003 01

CTD 5.

Surface samples for CO2 group in line bottle 25.

 

Station 004 02

CTD 5.

Surface samples for CO2 group in line bottle 25.

 

Station 005 01

CTD 5, big Rosette.

Surface samples for CO2 group in line bottle 25.

DLOG - 104 SiO3 low (qflg=3)

       104 PO4 low  (qflg=3)

 

Station 006 01

CTD 5, big Rosette.

Surface samples for CO2 group in line bottle 25.

  

Station 007 01

CTD 5, big Rosette.

Surface samples for CO2 group in line bottle 25.

 

Station 008 01

CTD 5, big Rosette.

Surface samples for CO2 group in line bottle 25.

 

Station 009 01

CTD 1, small Rosette.

Double surface samples for CO2 group in line bottle 25.

 

Station 010.01

CTD 5, big Rosette

Surface samples for CO2 group in line bottle 25.

 

Primary cruise, northern Japan Sea

 

no GPS data between 22:17 and 23:10 02 Mar 2000. GPS didn't work.

Change GPS.

 

Station 011.01

Surface samples for CO2 group in line bottle 25.

Salt box number (NT-17) in Small volume sample log is wrong,

correct -003 in rs-files.

DLOG AUTOSAL - computer reset during standartize (two start worm).

               edit files RS/01101 and 01101.lst. Original

               files saved as 01101.svd and 01101d.lst

               114- salt high (rerun?). qflg=4

 

Station 012.01

Surface samples for CO2 group in line bottle 25.

Bottle N6 - stopcock leak

CTD conductivity offset in upcast.

 

Station 013.01

Surface samples for CO2 group in line bottle 25.

no GPS data in navlog.txt between 04:01 and 11:41 03 Mar 2000

GPS work, unknown reason data lost (operator's mistake?).

Problem with ejection of videocassete from VCR

DLOG AUTOSAL - 112-salt seems high (qflg=4)

               110-           low   (qflg=3)

               108,109  -salt high (qflg=3)

               106- sample bottle close badly.

variability of AUTOSAL salt is high in comparison with CTD.

Operator was change during measurements.

 

Station 014.01

Surface samples for CO2 group in line bottle 25.

DLOG - bottles 01, 02 - no oxygen, Dosimat or computer problem.

       Measurements continue after computer programm reset.

       AUTOSAL - 103 salt seems high (qflg=3).

                 116 salt high (qflg=3).

No GPS data in navlog.txt between 20:04 and 21:24 03 Mar 2000.

unknown reason, GPS work.

 

Station 015.01

Surface samples for CO2 group in line bottle 25,26,27.

DLOG - small variations in O2 and nuts in bottom layer

       (bottle 1-6). PO4-NO3 relation curve differ from other

       stations. Probably OK (qflg=2).

 

Station 016.01

Surface samples for CO2 group in line bottle 25,26.

DLOG - 102,103 -oxy seems slight low. Probably OK (qflg=2).

       small variations  NO3 in deep water (101-105).

       Probably OK (qflg=2).     

AUTOSAL - after bottle 22 pump don't work. Repair of autosal 57-396 pump.

 

Station 017.01

Surface samples for CO2 group in line bottle 25,26.

 

Station 018.01

Surface samples for CO2 group in line bottle 25.

DLOG - AUTOSAL - 101 salt high in constant S layer (qflg=4).

                 106 salt too high (qflg=4).

                 103-105 salt high (qflg=4).

                 Sample warming during measurements?

 

Station 019.01

Surface samples for CO2 group in line bottle 25.

Small strong cyclone, rough weather between St. 19 and 20

After strong wind GPS don't work. Change GPS antenna before Sta.20.

DLOG - AUTOSAL 102 - salt very highin constant S deep water (qflg=4).

               103 -salt high (qflg=4).

               104 -salt high (qflg=3).

               110 -salt high (qflg=3).

               112 - salt to high(qflg=4).

        nuts   101 - NO3 low (qflg=3).

        oxy    104 - o2 high. Probably OK (qflg=2).

 

Station 020.01 - CTD - computer error during down cast.

Station 020.02 - CTD - up cast from 600 m.

 

Station 020.03

Surface samples for CO2 group in line bottle 25.

DLOG - nuts -no NH3 measurements, electric cable break.

 

Station 021.01

Surface samples for CO2 group in line bottle 25.

DLOG - 117,118 -low oxy and high nuts (qflg=2).

 

Station 022.01

Surface samples for CO2 group in line bottle 25.

CTD - no confirm on SBE unit after bottles 23 and 24.

      Bottles don't closed. Edited 02201.bot file.

      Original file saved as 02201sav.bot .

      No all informations  in 02201.nav. Added 02201.nav

      from console operations log. Original file saved

      as 02201sav.nav.

DLOG -Surface samples taken through CO2 Sea Cat system (oxy,nuts,salt).

      Stored in H00 file as bottle 24. CTD data for bottle 24 line

      taken from 02201sav.bot.

      AUTOSAL - 112,113 salt too high (qflg=4).

         nuts - 105,106 NO3  low   (qflg=3).

 

Station 023.01

Surface samples for CO2 group in line bottle 25.

DLOG - AUTOSAL  -108,109 salt high  (qflg=4).

                 117 salt high      (qflg=4).

                 122- salt low       (qflg=4).

 

Station 024.01

Surface samples for CO2 group in line bottle 25.

CTD - wrong ALT depth in 02401.nav

DLOG - AUTOSAL 103,106,118 salt high (qflg=3)

               113- salt high (qflg=4)

       nuts - SIO3 high (qflg=3).

 

Station 025.01

Surface samples for CO2 group in line bottle 25.

No GPS data in navlog.txt  between 14:13 and 21:38 05 mar 2000.

GPS OK.

CTD - Bottle 6 was not closed. The rest worked OK.

      When operator pushed button B on console to close bottle 6,

      it was not closed. Instead of this bottle 7 was closed.

      Next botle that got closed on Rosette was 8,9,...24. However

      in the 02501.bot file the serial numbering of the bottles kept as

      standard (1,2,3,4,5,6,7,8,...23 !). These means that botlle

      6 in 02501.bot.file actually corresponds to bottle 7 on Rosette,

      7 - 8, ... 23 - 24.

      Edited 02501. bot file. Original file saved as 02501sav.bot.

DLOG - 102 oxy high (qflg=3).

       nuts variations in deep water (101-108)

       108 - NO3 and SiO3 high (qflg=3).

     

Station 026.01

Surface samples for CO2 group in line bottle 25.

CTD salinity spikes in upper 500 m layer. Front?

DLOG - 104 NO3 and SiO3 high (qflg=3).

 

Station 027.01

Surface samples for CO2 group in line bottle 25.

DLOG -AUTOSAL 117 -salt high. Salt intrusion on 450 db. OK

              101,103,104 - salt high (qflg=4).

              107 -salt high (qflg=4).

       nuts   102 - NO3 low (qflg=3).

 

Strong northern wind (20m/c).Due to storm weather r/v moved to

the Peter Great Bay.

 

Due to frizing of water in bottles AUTOSAL measuremens of salinity

are noisy for minus air and water temperature.

Information about frizing bottles in SV Sample Log is not full.

 

 

Station 028.01  (first St. in the Peter Great Bay).

Bottles don't closed - minus water and air temperature.

 

Station 028.02

Surface samples for CO2 group in line bottle 25.

Some bottles don't closed. Problem with sampling-

stopcocks froze. Hair fan was used to melt ice in stopcocks and

provide water flowing from bottles.

Closed bottles-  NN 1,4,7,12,20,21,22?

DLOG -    AUTOSAL - no end worm std due to asal programm interrupt.

          Check a connection between AUTOSAL and computer.

          AUTOSAL power off -power on. New calibration for

          02901 (first worm std) used as end worm in

          02802 and 02802.lst. Original saved as 02802.sav

          and 02802sav.lst.

          No salt box in SV Sample Log, Check salinometr Log.

          C10 is correct.

          224 - salt, nuts extra line ? No in SV Sample Log.

          Samples taken from Sea Cat CO2 system.

          Stored in H00 file as bottle 24. CTD data from bottle 24 line.

          All salt seems noisy. Probably, due to samples frizing on a deck.

 

 

 

Station 029.01

Surface samples for CO2 group in line bottle 25.

SLOG - Triple bottles on each depth. One sample on each depth.

       Samples taken from bottles N 1,5,8,11,12,14,16,18,20,22,23,24.

       Minus air temperature -samples froze on a deck during sampling

       procedure

DLOG - no comments.

 

Station 030.01

Surface samples for CO2 group in line bottle 25.

CTD - depth in stacst file seems wrong.

 

Station 031.01

Surface samples for CO2 group in line bottle 25.

Small Rosette CTD-1.

 

Cheking of salinity in upper layer samples is hard due to using

Small Rosette CTD-1.

 

CTD - bad information in 03101.nav. Original file

      saved as 03101sav.nav. No depth and position data in 03101.nav.

      03101.nav edited according navlog.txt

      CTD programm start as CTD - 5, restart for CTD - 1. Edited file

      03101.bot. Original saved as 03101sav.bot.

      Files 03101.scr and 03101.raw in CTD computer was empty after

      station. VCR work well. Probably 03101.nav in CTD computer was

      corrected in different manner.

SLOG -  Minus air temperature -bottles froze on a deck during sampling

        procedure.

        Bottle N 17 didn't closed.

DLOG -  AUTOSAL 101, 103 -not enough water in salt bottle

 

Station 032.01

Surface samples for CO2 group in line bottle 25.

Small Rosette CTD-1.

SLOG - Minus air temperature -bottles froze on a deck during sampling

       procedure 

       Bottle N 9 - did't closed.

DLOG   AUTOSAL 103 - not enough water in samples for AUTOSAL

               116 - not enough water, measurement was done.

               104 - salt high (qflg=4).

               108, 113 - salt too high (qflg=4).

               119 - salt high(qflg=3).

       nuts    111  - PO4 low   (qflg=4).

               122 - NH3 high (qflg=4).

Station 033.01

Surface samples for CO2 group in line bottle 25.

Small Rosette CTD-1.

CTD salinity spikes in upper layer.

SLOG - Minus air temperature -bottles froze on a deck during sampling

       procedure

       Bottles 6, 10 didn't closed.

DLOG - AUTOSAL -109 - not enough water in samples. No measurement.

                107 - salt too low. Not enough water in Salt Bottle (qflg=4).

                101 - salt high (qflg=4).

Nutrients on Sta. 33 have suspricious high values in comparision with

neighbouring station Bottom SiO3 > 100 uM/l.

 

Adjust time in NOBELTEC programm (probably 7 Mar 2000). Difference

between real time and computer time was about 5 minutes.

 

Station 034.01

Surface samples for CO2 group in line bottle 25,26.

Small Rosette CTD-1.

CTD - strong salinity offset in upper layer downcast. Upcast OK.

SLOG - Bottles N 7, 16 din't closed.

       bottles 2,6,14 - no water for salt, no measurements (CFC sampling).

       Minus air temperature -bottles froze on a deck during sampling

       procedure

CTD-   two position info in 03401.nav file. Wrong deleted. Original

       saved as 03401sav.nav.

DLOG - AUTOSAL - 108,110, 113 salt too low - not enough water in

                 Sampling Bottle for good measurements (qflg=4).

                 112 salt low (qflg=4).

 

Check and care computer against viruses.

"Monkey" virus on O2 floppy.

 

Station 035.01

Surface samples for CO2 group in line bottle 25.

Small Rosette CTD-1.

Bottles N 2, 15 din't closed.

Bottle N 16 leak prior to venting.

No salt box number in SV Sample Log. CC9 is correct according

Salinometr Log

DLOG - AUTOSAL - 101 salt high -not enough water in Samp. Bottle (qflg=4).

                 101 oxy and NO3 low (qflg=4).

                 107 oxy and nuts bad (qflg=4). Bottle can close on

                 another depth.

 

Station 036.01

Surface samples for CO2 group in line bottle 25.

Small Rosette CTD-1.

CTD -     salinity offset (500-1100).

SLOG -    Bottles N 15, 24 din't closed.

DLOG -    Surface samples taken from Sea Cat CO2 system.

          Stored in H00 file as bottle 24, CTD data from bottle 24 line.

          Oxy seems too low and very noisy. Bed ficsation of samples by

          operator.

          All hyddata profiles have  suspicious values.

          Women's Day in Russian.

 

Station 037.01

Surface samples for CO2 group in line bottle 25.

Small Rosette CTD-1.

CTD -  Problem with numeration of bottles in .bot.

       from bottle 1 to 10 - correct, 11 or 12 is absent in 03701. bot.

       After 11 in .bot numeration of bottles is uncorrect...

       Edit 03701.bot according SV Sample Log, Console Op Log.

       Pressure and tripped time in Console Op Log and .bot files

       was used as information for checking.. Original file

       saved as 03701d.bot.

SLOG - bottle 24 didn't closed. It's correct. (According Console

       Oper. Log - bottle 1 didn't closed).

       Double bottles on 1500, 1020, 600, 160, 33 depth.

       One sample from repeat bottles.

       Bottle N 16 leak prior to venting.

DLOG - AUTOSAL - 101 - salt high- not enough water in Sampling Bottle (qflg=4).

                 102 - salt high (qflg=4).

                 107 - salt high (qflg=4).

       0109 before 0120 -wrong bottle number. 0119 is correct.

       Change bottle number from 0109 to 0119 in RS\03701 and 03701.lst.

       Bottle 3 - sample taken, no salt measurement. Depth same

       as bottle 2.

      

 

Station 038.01

Surface samples for CO2 group in line bottle 25.

Small Rosette CTD-1.

CTD -  slope, Rosette touch bottom. Conductivity very noisy

       upcast near bottom. Bottle N 8,10-15,18? was damage or take

       a sediments.

       Bottles N 4,7,22 didn't close.

       Problem with numeration of bottles in .bot.

       Edit 03801.bot according SV Sample Log, Console Op Log.

       Pressure and tripped time in Console Op Log and .bot files

       was used as information for checking..

       Duplicate bottle 23 line as bottle 24 in 03801.bot.

       Original file saved as 03801d.bot.

SLOG - Bottles N 4, 7,8,11,12,13,14,15,16,18,22,24 didn't closed

       according Console Op Log. Probably, bottles 4,7,22 didn't closed.

       According SV Sample Log samples was taken from bottles

       1,2,3,5,6,9,10,15,16,17,19,20,21,23,24. Probably, SV Sample

       Log information is correct. Use in edition of 03801.bot file.

       No information about salt and nuts  bottle N in SV Sample Log.

DLOG - AUTOSAL - Bottle 1 - not enough water.

       Bottles 6,9 -samples taken, but no salt data.

       102 - salt high (qflg=4).

       109 - oxy high, NO3, PO4 high, SiO3 low - bottle was

       damage during bottom touch (qfgl=4).

       116 - Oxy high (qflg=4).

       101 - bottle close during contact with botom (qflg=4).

 

Station 039.01

Surface samples for CO2 group in line bottle 25.

Small Rosette CTD-1.

CTD - Problem with pressure sensor.

 

Station 039.02

Surface samples for CO2 group in line bottle 25.

Small Rosette CTD-1.

CTD -  Problem with numeration of bottles in .bot.

       Edit 03902.bot according SV Sample Log, Console Op Log.

       Pressure and tripped time in Console Op Log and .bot files

       was used as information for checking..

       Original file saved as 03901d.bot.

SLOG - Bottles N 8 is absent in SV Sample Log. Did't closed?

       Bottles N 9, 11 are absent (repair).

       Bottles 10 in Console Op. Log is wrong. Surface samples

       taken throught Sea Cat CO2 system. Save in H00 as bottle N24.

       In SV sample Log cast N is wrong. 2 is correct.

DLOG - AUTOSAL - salinometr data stored in RS\03801 and

       03801.lst as 038 02. Files edited, change station

       number. Original saved as 03801.svd and 03801d.lst.

       Bottle 1 - salt high -not enough water (qflg=4).

       0224 -  Samples taken from Sea Cat CO2 system.

       206 - oxy high, PO4 too high, NO3 low (qflg=4). Two lines

       (205 and 206) on 90 db depth with different values. Probably,

       206 can be deleted as bed.

      

Station 040.01

Surface samples for CO2 group in line bottle 25.

Small Rosette CTD-1.

CTD -  oxygen very noisy.

SLOG - Bottles N 3, 5, 11 didn't closed.

       Bottle N 17, 16 leak prior to venting.

       Bottles N 24 is absent (repair).

       All bottles frose.

DLOG - AUTOSAL 118,123 no water for salt.

               113 - salt too high, sample is a mixture between

                     bottles 13 and 14 (qflg=4).

               120,122 - salt too high (qflg=4).

        nuts   101 - NO3 too high (qflg=4).      

 

Station 041.01

Surface samples for CO2 group in line bottle 25.

Small Rosette CTD-1.

CTD - oxygen very bad.

SLOG - Bottle N 11 didn't closed.

       Bottle N 17 leak prior to venting.

       Bottles N 23, 24 are absent (repair).

       All bottles frose.

 

DLOG - nutrients -110 not enough water for measuremets.

                  102,103 nuts low (qflg=3).

       AUTOSAL -  Bottle 17,18 - not enoug water for salt (1/2)

                  Bottles 1,10,12,19 - no water for salt.

                  in samples (qflg=3)

                  122 - surface salt too high (qflg=4).

Station 042.01

Surface samples for CO2 group in line bottle 25.

Small Rosette CTD-1.

CTD -  oxygen very noisy. Bad.

SLOG - Bottle N 24 is absent (repair).

       Bottle N 3,10,20,21 - not enough water for salt (1/2 salt bottle)

       Bottle N 2, 11 leak after to venting.

       Some bottles froze.

DLOG-  102 oxy too high. Sample taken from leaking bottle N 2 (qflg=4).      

       101,109 -salt too high (constant S deep water). (qflg=4)

       112 -salt high (qflg=3).

       nuts - 103-109 - variations NO3 (qflg=3).

   

Station 043.01

Surface samples for CO2 group in line bottle 25.

Small Rosette CTD-1.

CTD - no oxygen, sensor died.

      salinity bad downcast in upper layer. Upcast OK.

SLOG - Bottle N 5 sock was broken (no sampling?).

     - Bottle N 16 didn't closed.

       Bottle N 14,15,17,18 - no water for salt.

DLOG - nuts -106 PO4 too high (qflg=4).

             variations of NO3 in deep and bottom layers (qflg=3).

       AUTOSAL - 109, 111 too low (qflg=4)

                 107 - high (qflg=3).

      

 

Station 044.01

Surface samples for CO2 group in line bottle 25.

Small Rosette CTD-1.

CTD - no oxygen, sensor died.

      salinity offset (500-1800)?

      Added 04401.nav file used by Con. Op. Log data.

      Original saved as NAV/04401sav.nav.

SLOG -Bottle N 9 - not enough water for salt (1/2 salt bottle)

      Bottle N11 - leak prior to venting.

DLOG -Bottle N 20 -two samples of oxy.

      102 - all line of parametrs seems unreal. Bottle close at another depth

            in upper layer (qflg=4). Delete 102 line from H00. Saved in

            H00.sav.

      105 - salt high, oxy low, nuts too high (qflg=3).

      AUTOSAL - dial 265 is wrong, correct value is 280.

                107- salt high (qflg=4).

     

       

 

Station 045.01

Surface samples for CO2 group in line bottle 25.

Small Rosette CTD-1.

CTD - no oxygen, sensor died.

SLOG - Bottle 9 -stopsock leak

DLOG - 102 - oxy, nuts bad. Bottle close at other depth (qflg=4).

       Delete line 102 from H00, save in H00.sav.

       106 - nuts  high (qflg=3).

       108 - oxy too low (qflg=4), nuts high (qflg=3).

       111 - salt too high (qflg=4).

      

Station 046.01

Surface samples for CO2 group in line bottle 25.

Small Rosette CTD-1.

CTD -  no oxygen, sensor died.

       strong salinity offset in upper layer downcast. Cond. cell frouzen ?

       Downcast off set and noisy in upper part (0-120 m). Upcast OK.

SLOG - Bottle 9 -stopsock leak

       Bottles 19,20,21,22,23,24 frozen

       Bottle N 9 - not enough water for salt (80 ml in salt bottle)

                    measurement was done.

DLOG - variability of nuts in deep water (bottles 101-107) seems

       high (qflg=3).

 

Station 047.01

Surface samples for CO2 group in line bottle 25.

Small Rosette CTD-1.

CTD - no oxygen.

SLOG- Bottle N 2 didn't closed.

DLOG -  nuts  - 105 NO3 high (qflg=3).

 

Station 048.01

Surface samples for CO2 group in line bottle 25.

Small Rosette CTD-1.

CTD -  no oxygen.

DLOG -104 - bottle close at other depth (about 1000) qflg=4.

      105 - bottle close ar other depth (near surface) qflg=4.

      109 - bottle close at other depth  (about 300) qflg=4.

      Delete 104, 105, 109 lines from H00. Save in H00.sav.

 

 

Station 049.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.!!!!!!

SLOG - winch stop downcast (depth about 500 m).

CTD - oxygen noisy. After frost?

DLOG- AUTOSAL - 101,102,104,106,108,113 salt high in constant S

                deep layer (qflg=4).

                nuts 102 NO3 low (qflg=3).

 

Station 050.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

CTD - oxygen noisy.

DLOG - AUTOSAL computer error after first worm std.

               New calibration after reset.

               101 salt high (qflg=4).

       nuts    105 NO3 low (qflg=3).

 

Station 051.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

CTD - oxygen noisy.

 

Station 052.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

CTD - oxygen noisy.

DLOG- oxy  108 oxy high (qflg=3).

      nuts 106 NO3 low (qflg=3).

           103 NO3 high (gflg=3).

 

Station 053.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

CTD - oxygen noisy.

DLOG -        108 -salt high in constant S deep layer (qflg=4).

              111 -salt high (qflg=3).

       nuts - 101 NO3 low, 105 NO3 high (qflg=3).

 

Station 054.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

CTD - oxygen noisy.

SLOG - No N of bottles in SV Sample Log. Only 14 salt bottles from

       15 depth. Surface salt sample be lost.

 

Adjust time in NOBELTEC nav.computer (03:13 -> 03:31 11 Mar 2000). Difference

between real time and computer time was about 18 minutes.

Slowly computer clock.

 

Station 055.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

Winch stop upcast (1100 db).

CTD - oxygen noisy.

DLOG - nuts 102 NO3 high (qflg=3)

 

Station 056.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

CTD - oxygen noisy.

DLOG AUTOSAL - 102,103,106,115 salt too high (qflg=4).

               121 high (qflg=4).

          oxy- 112 high. Probably OK (qflg=2).

         nuts- 102,105 NO3 high (qflg=3).

               101- NO3 low (qflg=3).

Station 057.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

CTD - oxygen noisy.

DLOG - 105,106 - weak NO3 max.

 

Change time on navlog computer from AM to PM 00:38 12 Mar.

11:11 -> 01:16 12 Mar (5 min break) again PM during Station 058.01.

May be problem in 05801.nav?

 

Station 058.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

CTD - oxygen noisy.

DLOG - 101 salt high in constant S deep water (qflg=4).

 

Check "stacst" file. Station time in Console Op. Log and stacast may

be different due to navlog computer time problem. Probably operators

sometimes used ship GMT time in Console Op. Log (ship clock time is correct).

 

Station 059.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

CTD - change oxygen sensor.

      extra lines in 05901.bot (extra sta. info after data).

      Deleted extra lines. Original saved as 05901b.bot.

      Two position info in 05901.nav. Edited. Original saved

      as 05901sav.nav

 

Monday, 13.

 

Station 060.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

SLOG - Not enough cable on a winch to reach bottom (strong drift of vessel).

       Winch stop (3000) upcast.

       Cable demage due to rolling. Cut injure part of cable.

DLOG - AUTOSAL    110 - salt high (qflg=4).

    oxigen        109 - oxy high. Computer error during titration. (qflg=4).

                  101 - oxy high (qflg=4).

 

Boot sector O2 floppy infected by "Empire. Monkey" virus again.

Scan O2 computer - traces of Monkey virus in memory (probably, Monkey

lived in O2 computer long time. We traces this virus in summer KH36

cruise on O2 floppy). No time for care O2 comp.

 

Station 061.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

All cable was used due to strong vessel drift.

SLOG- Bottles from 11 to 24 were frozen.

DLOG- AUTOSAL -114,119,122,123 salt high (qflg=4).

               Frozen bottles during sampling?

      nuts   - strong variability in bottom layer (101-109) qflg=3.                       

 

Station 062.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

CTD- No connection with Rosette. Chek connectors?

     Pressure sensor didn't work in upper layer.

     Downcast to 12 db and then go to surface.

     After that downcast again.

DLOG -  oxy 115 - O2 low. CTD O2 also show O2 min. OK (qflg=2).

            101 - no data. Operator mistakes.     

 

Station 063.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

CTD - oxy spike 450 m

      Slope - depth from echosounder were noisy. Due to

      this reason Rosette didn't go close to bottom.

      Power source for altimetr died?

DLOG - nuts 103 NO2 high (qflg=3).

 

Station 064.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

DLOG - AUTOSAL - end worm std low. Drift =-0.001 Three measurements end worm

                 in RS\06401 - 1.99978 1.99971 1.99976.

                 First and third seems OK.

 

Station 065.02

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

CTD computer restart before station. 065.01 is empty.

In SV Sample Log wrong N cast (1). Change cast number in RS\RN\RO files

and rename fales from 06501 to 06502before merging. Files in

Salt, Nuts, Oxy computers (may be) with wrong (1) cast number.

DLOG - AUTOSAL drift 0.0016?

                202 salt high in constant S layer (qflg=4).

           nuts 119 -no data?

 

Station 066.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

CTD - salinity offset upcast from 1000 db.

SLOG salt box number 1B in SV Sample Log and 001 in RS\files. 001=1B.

 

Station 067.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

Organic matter in oxygen flask N 1658.

Station 068.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

 

Station 069.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

DLOG AUTOSAL 110 -salt high (qflg=3).

 

Station 070.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

Bottle 6- Corc  didn't close before station.

DLOG - AUTOSAL 104 salt high in constant S layer (qflg=4).

 

Station 071.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

CTD Sensor didn't work due to frezing.

Only CTD cast in upper layer.

 

Station 071.02

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

Bottles N 8,10 froze. O2 draw temp. in SV Sample Log (bottles 8-9)

low.

DLOG AUTOSAL 110 salt high. Bottle frozen during sampling (qflg=4).

 

Station 072.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

 

Station 073.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

 

Station 074.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

 

Station 075.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

 

Adjust time in NOBELTEC programm (probably 15 Mar 2000). Difference

between real time and computer time was about 5 minutes.

 

Station 076.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

CTD oxygen sensor work bad downcast.

DLOG AUTOSAL - 101,103 salt high in constant S layer (qflg=4).

        oxy  - 101 low (qflg=3).

 

Station 077.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

CTD oxygen sensor work bad downcast.

Two position info in 07701.nav. Deleted. Saved in 07701sav.nav.

Two bottle trip data lines in 07701.bot. Edited. Saved in 07701d.bot.

DLOG AUTOSAL - 102 salt high (qflg=4).

 

Station 078.02

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

CTD oxygen sensor work bad downcast.

DLOG - AUTOSAL 201 -salt high (qflg=4).

 

CTD computer restart before station. 078.01 is empty.

Change cast number in RN\ files from 1 to 2.

and rename RN\ fales from 07801 to 07802 before merging. Files in

Nuts computers have  wrong (1) cast number.

 

 

Station 079.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

CTD oxygen sensor work bad downcast.

SLOG - bottle 1 didn't close.

 

Station 080.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

CTD oxygen sensor work bad downcast.

DLOG AUTOSAL - 108 salt high(qflg=3).

 

Station 081.01

Surface samples for CO2 group in line bottle 25.

Big Rosette CTD-5.

 

Comments

CTD - after survey check E\CTD\ *.scr files in CTD computer.

00101.scr,03401.scr,04601.scr,05201.scr,05901.scr -no data.

Probably will be rewrite from ZIP100 disk.

Problem: NavLog computer have a slow clock. During cruise computer time

was corrected three times (may be more) according with real time.

Final time difference is about 30 min (may be more). For correction

navlog time can be use data korean Sea Cat GPS (on floppy discs).