Numerical simulations on the explosive cyclogenesis over the Kuroshio Current

文献类型： 外文期刊

第一作者： Xu, YL

作者： Xu, YL;Zhou, MY

作者机构：

关键词： Kuroshio current;explosive cyclogenesis;numerical simulation

期刊名称：ADVANCES IN ATMOSPHERIC SCIENCES （ 影响因子：3.158； 五年影响因子：3.033 ）

ISSN： 0256-1530

年卷期： 1999 年 16 卷 1 期

页码：

收录情况： SCI

摘要： In this paper, the Pennsylvania State University-NCAR Mesoscale Model (MM4) is used to investigate the explosive oceanic cyclone of 14-15 March 1988 over the warm Kuroshio Current. A series of numerical simulations on this cyclogenesis indicates that the favorable weather conditions and strong baroclinity in the low- and middle-level are essential to its explosive development. The explosive cyclogenesis occurred over a wide range of sea surface temperatures (SST's), which was then characterized by strong baroclinity, the low-level jet (LLJ) was initially formed under the favorable atmospheric circulation and then this LLJ advected the moisture and heat northward far the explosive development of the cyclone, the LLJ played an important role in the process of cyclogenesis. Sensitivity experiments show that the latent heating was a key factor to explosive cyclogenesis, the latent heating deepened the short-wave trough, which resulted in the rapid intensification of the cyclone; while in the explosive intensification stage and continuous development stage, there was less contribution of local surface processes for the explosion of the cyclone.

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