Pacific Subsurface Temperatures

   This directory contains the monthly mean subsurface temperature grid point
 values (GPVs) at the depths of 100m, 200m and 400m from January 1990 to the
 latest month.
   The temperature is determined for each 0.5 latitude x 1.0 longitude degree
 grid box in seas from 80W, 20S to 120E, 60N. 

   A function fitting method (Oceanographical Division, Marine Department,
 JMA, 1990) was used to determine the GPVs until December 2000. The in situ
 observation data by research vessels, voluntary observing ships, buoys and
 floats, which are mainly obtained via Global Telecommunication System (GTS)
 of WMO were used. An objective data analysis (Kuragano et al., 2000) have
 been used since January 2001. The TOPEX/POSEIDON altimeter and the NOAA see
 surface temperature data in addition to the above in situ observations are
 assimilated in this model.


   Reference:
 Kuragano.T, N.Yoshioka, Kamachi,M and A.Shibata (2000):Ocean Monitoring with
 TOPEX/POSEIDON Altimetry (in Japanese). Weather Service Bulletin, 67, Special
 issue, 27-49
 Oceanographical Division, Marine Department, JMA (1990): An objective
 analysis of subsurface temperature (in Japanese). Weather Service Bulletin,
 57,6, 271-282