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In this study, we used the Navy’s Generalized Digital Environmental Model (GDEM) climatological temperature and salinity data on a 0.5°×0.5° grid to investigate the seasonal variabilities of the southwest Philippines Sea (0.5°-9°N, 123.5°-136.5°) thermohaline structure and circulation. The GDEM for the area was built up on historical (1930-1997) temperature and salinity profiles. A three dimensional estimate of the absolute geostrophic velocity field on isopycnal surface was obtained from the GDEM temperature and salinity fields using the P vector method. The seasonal variabilities of the thermohaline structure and currents (obtained from the inverse method) such as the Mindanao Current, Mindanao Undercurrent, North Equatorial Counter Current, New Guinea Coastal Undercurrent, and dual eddies (cyclonic Mindanao Eddy and anticyclonic Halmahera Eddy) are identified.
In this study, we used the Navy’s Generalized Digital Environmental Model (GDEM) climatological temperature and salinity data on a 0.5 ° × 0.5 ° grid to investigate the seasonal variabilities of the southwest Philippines Sea (0.5 ° -9 ° N, 123.5 ° -136.5 °) thermohaline structure and circulation. The GDEM for the area was built up on historical (1930-1997) temperature and salinity profiles. A three dimensional estimate of the absolute geostrophic velocity field on isopycnal surface was obtained from the GDEM temperature and salinity fields using the seasonal variation of the thermohaline structure and currents (obtained from the inverse method) such as the Mindanao Current, Mindanao Undercurrent, North Equatorial Counter Current, New Guinea Coastal Undercurrent, and dual eddies (Cyclonic Mindanao Eddy and anticyclonic Halmahera Eddy) are identified.