ANNUAL SEA-LEVEL VARIATIONS IN THE SOUTHERN TROPICAL INDIAN-OCEAN FROM GEOSAT AND SHALLOW-WATER SIMULATIONS

被引：117

作者：

PERIGAUD, C ^{[1
]}

DELECLUSE, P ^{[1
]}

机构：

[1] UNIV PARIS 06, OCEANOGR DYNAM & CLIMATOL LAB, F-75252 PARIS 5, FRANCE

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS | 1992年 / 97卷 / C12期

关键词：

D O I：

10.1029/92JC01961

中图分类号：

P7 [海洋学];

学科分类号：

0707 ;

摘要：

Sea level variations in the Indian Ocean north of 20-degrees-S are analyzed from Geosat satellite altimeter data in 1987-1988. These observed variations are compared with numerical simulations from a reduced-gravity model forced by observed winds over the same period. The first complex empirical orthogonal function of observed and simulated variations is an annual signal. For this signal, observations and simulations are highly correlated in both time and space. Off-equatorial sea level variations propagate westward and poleward as Rossby waves. The strongest annual variations occur in the southeastern tropical Indian Ocean. The maximum amplitude (approximately 12 cm) is located at about 90-degrees-E, 12-degrees-S, although the wind stress curl is weak there and east of it. The signal propagates from the eastern boundary to the southwest across almost all the basin.

引用

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页码：20169 / 20178

页数：10

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