| Determination of the Current System on Isopycnal Surface Between Mindanao and New Guinea from GDEM |
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| 作者姓名： | Peter C Chu |
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| 作者单位： | Naval Ocean |
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| 基金项目： | PeterChuandFanChenwuweresupportedbytheOfficeofNavalResearchandtheNavalOceanographicOffice.LiRongfengwassupportedbyNSFC ( 40 0 760 0 9),andChineseAcademyofSciences (KZCX2 2 0 4,KZCX1 SW 0 11 6) |
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| 摘 要： | 1 .INTRODUCTIONThewesternequatorialPacific ,particularlythesouthernmostPhilippineSea ,wascalled“watermasscrossroads”byFineetal.(1 994 )duetotheconfluencethereofseveralwatermassesfromhigherlatitudesofbothhemispheres (Wyrtki,1 96 1 ;Fineetal.,1 994 ) .Fineetal.(1 994 )de picted (Fig .1 )majorcurrentsintheIndonesianregion .AfterencounteringthewesternboundaryalongthePhilippinecoast,theNorthEquatorialCur rent (NEC)bifurcatesintothenorthwardflowingKuroshioandthesouthwardflowingMindanao…
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| 关 键 词： | GDEM 几内亚 数字环境模型 温度 盐度 海洋动力学 水流系统 等密度表面 |
| 收稿时间： | 30 May 2002 |
| 修稿时间： | 21 November 2002 |
Determination of the current system on isopycnal surface between Mindanao and New Guinea from GDEM |
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| Peter C Chu.Determination of the Current System on Isopycnal Surface Between Mindanao and New Guinea from GDEM[J].Chinese Journal of Oceanology and Limnology,2003,21(3):193-213. |
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| Authors: | Peter C Chu Li Rongfeng Fan Chenwu |
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| Institution: | (1) Naval Ocean Analysis and Prediction Laboratory Department of Oceanography, Naval Postgraduate School, 93943 Monterey, CA, USA;(2) LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, 100080 Beijing, China |
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| Abstract: | 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 (cyclinic Mindanao Eddy and anticyclonic Halmahera Eddy) are identified.
Peter Chu and Fan Chenwu were supported by the Office of Naval Research and the Naval Oceanographic Office. Li Rongfeng was
supported by NSFC (40076009), and Chinese Academy of Sciences (KZCX2-204, KZCX1-SW-01-16). |
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| Keywords: | current system isopycnal surface GDEM |
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