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首页> 外文期刊>Remote Sensing of Environment: An Interdisciplinary Journal >Characteristics of atmospheric divergence and convergence in the Indian Ocean inferred from scatterometer winds
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Characteristics of atmospheric divergence and convergence in the Indian Ocean inferred from scatterometer winds

机译：散射仪风推算的印度洋大气发散和收敛特征

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摘要

Large-scale surface atmospheric convergence and divergence patterns in the Indian Ocean are mapped using high-spatial resolution, merged scatterometer wind vectors during 1991-2000. The convergence zone evolves to north of 15 degrees S as a result of convection promoted by warm (>28 degrees C) equatorial sea surface temperature (SST), and it exhibits strong intensity during boreal summer and winter. A divergence zone evolves to the south of 15 degrees S as a result of subdued convection caused by colder SST (<24 degrees C) that reduces outgoing long-wave radiation; it exhibits enhanced intensity in the eastern Indian Ocean during boreal winter. The interannual variability shows that the divergence in the eastern Indian Ocean lags its western counterpart by 5 - 7 months. The convergence in the eastern Indian Ocean is stronger than its western counterpart during boreal summer. Relationship between Southern Oscillation Index and spatially averaged convergence time series indicate that the latter weakened during strong El Nino years 1994 and 1997. spatially averaged divergence time series show a near-contemporaneous relationship with all-India rainfall, with a temporal lag of 1 similar to 2 months. (C) 2005 Elsevier Inc. All rights reserved.
机译：在1991-2000年期间，使用高空间分辨率，合并的散射仪风向图绘制了印度洋的大型地面大气辐合和散布图。由于温暖（> 28摄氏度）的赤道海面温度（SST）促进对流，收敛带向北发展了15度，并且在夏季和冬季都表现出较强的强度。由于较低的SST（<24摄氏度）导致对流减弱，从而减少了长波辐射，发散区向南扩展到15度南。在北方冬季，它在印度洋东部表现出增强的强度。年际变化表明，印度洋东部的发散量落后于其西部对应的发散量5-7个月。在北方的夏季，印度洋东部的汇合强度强于西方。南方涛动指数与空间平均收敛时间序列之间的关系表明，在1994年和1997年强厄尔尼诺现象期间，后者减弱了。空间平均发散时间序列与全印度的降雨具有近乎同时的关系，时间滞后1类似于2个月。 （C）2005 Elsevier Inc.保留所有权利。

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