Seasonal variations of the front paths and wind field in the Southeast Indian Ocean and their relations

HE Zhi-gang; DONG Zhao-qian; PU Shu-zhen

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HE Zhi-gang, DONG Zhao-qian, PU Shu-zhen. Seasonal variations of the front paths and wind field in the Southeast Indian Ocean and their relations[J]. Haiyang Xuebao, 2007, 29(2): 18-24.

Citation:

HE Zhi-gang, DONG Zhao-qian, PU Shu-zhen. Seasonal variations of the front paths and wind field in the Southeast Indian Ocean and their relations[J]. Haiyang Xuebao, 2007, 29(2): 18-24.

HE Zhi-gang, DONG Zhao-qian, PU Shu-zhen. Seasonal variations of the front paths and wind field in the Southeast Indian Ocean and their relations[J]. Haiyang Xuebao, 2007, 29(2): 18-24.

Citation:

HE Zhi-gang, DONG Zhao-qian, PU Shu-zhen. Seasonal variations of the front paths and wind field in the Southeast Indian Ocean and their relations[J]. Haiyang Xuebao, 2007, 29(2): 18-24.

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Seasonal variations of the front paths and wind field in the Southeast Indian Ocean and their relations

1.
South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
2.
Polar Research Institute of China, Shanghai 200136, China
3.
First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China

Received Date: 2006-09-15
Rev Recd Date: 2006-11-28

Abstract

Abstract

Temperature and salinity measured by profile floats,upper layer temperature and ECCO wind stress field were used to study the seasonal variations of the front paths and wind stress field in the Southeast.Indian Ocean and analyze the fronto genesis of Subtropical Front(STF) and Subantarctic Front(SAF) preliminarily.We found that the seasonally averaged Agulhas Front(AF) can extend to 80 E and 82 E in summer and winter,respectively In most cases AF,SAF and South Subtropical Front(SSTF) converge and pass through Kerguelen-Amsterdam Passage as one front.The paths of SAF and PF are more southward in winter than those in summer in the downst reamdeep basin of Kerguelen Plateau Positive and negative wind stresscurl core appearalt ernately from north to south right downst ream of Kerguelen Plateau.The zero wind stresscurl is more northward in winter than in summer between 85 E and 105 ESTF locates at the area within the convergence Ekman pumping in this area results in the convergence of surface water,which could cause the formation of STF and help to maintain it.The seasonal shift of SAF is less than that of zero wind stresscurl,which causes that SAF locates at the area with weak positive wind stresscurl in summer while at the area with negative wind stresscurl in winter and means that wind stresscurl is not the directly external cause of the SAF fronto genesis.
- Southeast Indian Ocean,
- front,
- wind field,
- seasonal variations,
- frontogenesis

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References(21)

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