一次西北太平洋多热带气旋天气过程成因分析-海洋预报

一次西北太平洋多热带气旋天气过程成因分析

单位：中国卫星海上测控部, 江苏江阴 214431

分类号：P444

出版年·卷·期（页码）：2016·33·第四期（1-8）

摘要：

通过卫星云图、海洋热状态和环境流场条件，分析了2015年7月上旬连续产生于西北太平洋的3个热带气旋成因，得到以下几点结论：从云图特征分析得知，这3个热带气旋都孕育发展于一条纬状分布的热带辐合带中；在2015年7月持续增强的厄尔尼诺事件导致了160°E以东的中东太平洋低纬度地区大范围增温，对于这3个热带气旋的发生发展有利，并且导致了季风槽的东扩；季风槽中的对流不稳定、水汽条件、高低层相对涡度垂直切变以及环境风垂直切变是影响这3个热带气旋发生发展的有利因素。

The causes of three tropical cyclones (TC) continuously produced in early July 2015 in the Northwest Pacific were analyzed through satellite imagery, ocean thermal conditions and environmental conditions of the flow field. The following results were concluded: the cloud characteristics analysis showed that all three TC were developed in a weft shape distribution of Intertropical Convergence Zone(ITCZ); and the El Nino event developing in July 2015 led to a wide range of low-latitude regions warming of the Pacific east of 160°E in the Middle East, which was a favorable development for the three TC and led to the eastward expansion of the monsoon trough; convective instability, moisture conditions, relative vorticity and vertical wind shear in monsoon trough were the favorable environment factors influencing the development of the three TC.

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