Zonal anomaly of sea surface temperature in equatorial Indian ocean and its possible effect upon monsoon circulation
Zonal anomaly of sea surface temperature in equatorial Indian ocean and its possible effect upon monsoon circulation
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DOI：
10.1111/j.2153-3490.1970.tb00506.x
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发表时间：
1970-08
期刊：
影响因子：
--
通讯作者：
K. Saha
中科院分区：
文献类型：
--
作者：
K. Saha
本文指出赤道西印度洋和赤道东印度洋之间存在着明显的纬向海温异常。讨论了这种异常对赤道印度洋和阿拉伯海海气交换和低层环流的影响。结果表明，赤道西风带、双热带辐合带和索马里急流等现象都可以从纬向海温异常得到合理的解释。本文详细讨论了西南季风期间阿拉伯海上升流及其东进的作用，认为这种作用通过海气相互作用，可能改变了阿拉伯海的低气压。阿拉伯海上空的水平空气环流，这种环流可能会影响8月份印度西海岸沿着以及内陆的降雨分布，也解释了在此期间，东南部的阿拉伯海。本文讨论了海洋温度异常引起的垂直环流圈及其对季风环流和降水的可能影响。DOI：10.1111/j.2153-3490.1970.tb00506.x
The paper calls attention to the existence of a well-defined zonal anomaly of sea surface temperature between the equatorial west and east Indian ocean. The effect of this anomaly on ocean-atmosphere exchange and low-level air circulation in the equatorial Indian ocean as well as the Arabian Sea are discussed. It is shown that phenomena like the equatorial westerlies, the double intertropical convergence zone, and the Somali Jet receive plausible explanation on the basis of the observed zonal anomaly of ocean temperature. The effect of upwelling and its eastward advance in the Arabian Sea during the southwest monsoon are discussed in detail and it is suggested that this effect through air-sea interaction may change the low-level air circulation over the Arabian sea in a manner which may affect the distribution of rainfall along the west coast of India as well as inland during August and also explain frequent occurrence of feeble low pressure troughs in the southeast Arabian Sea during this period. Vertical circulation cells attributable to the observed anomalies of ocean temperature and their possible effect upon monsoon circulation and rain are discussed. DOI: 10.1111/j.2153-3490.1970.tb00506.x