Propagation and influence on tropical precipitation of intraseasonal variation over mid-latitude East Asia in boreal winter

被引：1

作者：

JIAO Yang ^{[1
,2
]}

WU Renguang ^{[1
,3
]}

机构：

[1] Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences

[2] College of Earth and Planetary Sciences, University of Chinese Academy of Sciences

[3] State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences

来源：

Atmospheric and Oceanic Science Letters | 2019年 / 12卷 / 03期

基金：

中国国家自然科学基金;

关键词：

季节内风场变化; 东亚中纬度地区; 向东和向南传播; 热带降水;

D O I：

暂无

中图分类号：

P461 [气候的形成和影响气候的因素];

学科分类号：

0706 ; 070601 ;

摘要：

本文研究冬季东亚中纬度地区9–29天季节内变化的传播特征和其对热带降水的影响。分析发现风场的季节内信号既可以向东传播,也可以向南传播。向东传播时,风场的季节内信号主要限于中纬度地区,表现为气旋和反气旋的向东移动。向南传播时,源于中纬度的经向风扰动可以深入到低纬度地区,甚至到达赤道附近。伴随的辐合辐散引起赤道附近地区降水异常,形成南海南部和中国东部-日本之间一个南北向偶极型降水异常。一个异常经向翻转环流在连接热带和中纬度季节内风场和降水变化中起着重要作用。

引用

页码：155 / 161

页数：7

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