海洋加热场对副高西伸影响的分析

作者：李月洪

单位：国家气象局气象科学研究院

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出版年·卷·期（页码）：1986·3·第一期（27-34）

摘要：

本文着重讨论梅雨期间大一暴雨前期,西太平洋海洋加热场增强,对副高西伸活动影响的若干物理过程.对该地区上空垂直环流圈三维结构的计算、分析表明,在非平均情况下,该区上空存在准瓦克环流型,在160°E附近有一支上升气流,临近雨日前夕明显地增强,这有利于西太平洋热带海洋加热场的能量向高空输送。与此同时,西太平洋西部反气旋下沉气流亦明显加强。这些均对副高的西伸有一定的影响。

In this paper the emphasis is focused on some physical processes through which the westward extension of the subtropical high is affected by the enhancement of the heating fidle over the West Pacific Prior to heavy rains. The calcu-lation and analysis of the three-dimensional structure of vertical circulation cell in this region show that a quasi- Walker circulation may appear over the West pacific under abnormal conditions, and that there obviously is an ascending air-current around 160°E and it becomes stronger within a few days before heavy rains, which would be advantageous to the heat transfer from the heating field to upper air.In the meantime,the subsidence air-current of the anticyclone located in the west part of the West Pacific has also become stronger.All these must have an effect on the westerly extension of the subtropical high in a greater degree.

参考文献：

[1] 李月洪 大一暴雨前期副高西伸与海洋加热场的初步分析 气象科学技术集刊4.气象出版社1983. [2] 陈烈庭 东大平洋赤道地区海水退度异常对热带大气环流及我国汛期降水的影响,大气科学1997年第1期

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