印度洋海底压强的季节和长期变化

doi:10.11978/2018131

Abstract

Abstract:

Using the GRACE satellite observation during 2003-2015, we reveal characteristics of the ocean bottom pressure (OBP) variability in the Indian Ocean, and explore their potential dynamics. The results show that the OBP in the Indian Ocean has significant seasonal variability. In the boreal winter, the OBP shows negative (positive) anomaly north (south) of 40 ^oS; and the pattern in summer is opposite to that in winter. The spatial pattern of the Ekman transport has a good correspondence with the OBP pattern in the Indian Ocean. The diagnosis results derived from the barotropic vorticity equation show that the OBP reconstructed by sea surface wind can better explain both the seasonal and long-term variations of the OBP in the Indian Ocean. In addition, analysis of sea level budget suggests that variation of OBP dominates sea level changes at high latitudes.

Key words: the Indian Ocean, GRACE satellites, ocean bottom pressure, barotropic response

CLC Number:

P731.1

Xueyi JING,Xuhua CHENG. Seasonal and long-term variability of ocean bottom pressure in the Indian Ocean[J].Journal of Tropical Oceanography, 2019, 38(5): 10-17.

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References 19

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Seasonal and long-term variability of ocean bottom pressure in the Indian Ocean

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