影响我国的东风波特征分析

夏季，随着西太平洋副热带高压的北抬，并逐渐形成稳定的东西带状，在其南侧的东风气流中，常有一些天气尺度的波动西移，这种波动称为东风波。通过资料普查和个例分析结果得出，影响我国的东风波正常均生成于西太平洋上，其在西移的过程中逐渐加强，并进入季风区后，由于受到西南气流的影响，其结构和性质均发生了变化。东风波在合适的环境下，可作为初始扰动而发展为热带风暴，也可启动另外类型的扰动发展为热带风暴，并引导其向西移动而影响我国东南部地区。

Characteristic Analysis of Easterly Waves Affecting China

In summer, with the western Pacific subtropical high lifting north and becoming steady east-west zonality gradually, in the easterly flow south of it, there are often some synoptic waves, which are named after easterly waves. Through the resources survey and case analysis, the easterly waves that affect China come from the western Pacific, which strengthen in the course of moving west. When easterly waves come into the monsoon region, the structure and the quality of it can be changed because of the effect of the by southwesterly flow. The easterly waves can be treated as initial disturbances and they may develop into the tropical revolving storm with suitable surroundings, or excite other disturbances to develop into the tropical revolving storm and lead it to move west to affect the east-south region of China.