Masaki KAWABE

University of Tokyo, Japan

I am analyzing the CTD O2 data taken at 165°E between 5°S and 40°N in August and September 1991, WHP P13C, and between 27°N and 48°N in May 1993, WHP P13J. I already examined the surface and deep zonal flows in this section and wrote the results in Kawabe and Taira (1995; Flow distribution at 165E in the Pacific Ocean. p.629-649. In, Biogeochemical Processes and Ocean Flux in the Western Pacific, eds. H. Sakai and Y. Nozaki, Terra Scientific Publishing Company). On a basis of this knowledge, I am studying water properties mainly in the surface and intermediate layers, focusing on the Subtropical Mode Water (STMW) and the North Pacific Intermediate Water (NPIW).

I drew vertical sections of potential temperature (T), salinity (S), dissolved oxygen (DO), potential density, geostrophic velocity, and potential vorticity (PV). The vertical sections against potential density were also drawn. Using these figures, I study the following subjects.

  1. Characteristics of these vertical distributions
  2. Relations of the distributions of T, S, DO, and PV with that of the zonal currents
  3. Differences of the distributions of T, S, DO, and PV between P13C (Aug.-Sep.) and P13J (May)
  4. Distributions of water masses such as STMW, NPIW, the North and South Pacific Tropical Waters, and the Antarctic Intermediate Water
  5. Meridional extension and property change of STMW and NPIW
  6. Relation of STMW and NPIW with the distribution of PV
  7. Relation of NPIW with the distribution of DO

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