天气尺度瞬变扰动的物理分解原理

被引：48

作者：

钱维宏

机构：

[1] 北京大学大气海洋科学系

来源：

地球物理学报 | 2012年 / 55卷 / 05期

关键词：

物理分解; 天气尺度; 瞬变扰动; 天气图; 极端天气事件;

D O I：

暂无

中图分类号：

P433 [大气动力学];

学科分类号：

摘要：

大气变量可以在时空域内物理分解成四个部分.前两个是纬圈-时间平均的对称部分和时间平均的非对称部分,分别由太阳辐射和海陆分布热力调节的季节变化引起,并形成规则的逐日气候.第三部分是由年际和季节内的热带海洋或极地热力强迫引起的纬圈平均瞬变对称扰动,可形成大气变量的行星尺度指数循环.第四部分是一些复杂的天气尺度瞬变非对称扰动.大气变量中的逐日天气尺度瞬变扰动,可以用于指示区域持续性的干旱、暴雨、低温和热浪等极端天气事件.天气尺度瞬变扰动天气图能在极端天气事件的预报中发挥应有的作用.

引用

页码：1439 / 1448

页数：10

共 10 条

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