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

论文摘要

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。

论文目录

• 1. Introduction
• 2. Data and methods
• 3. Propagation characteristics of intraseasonal variation over East Asia
• 4. Impact of intraseasonal variation on tropical precipitation
• 5. Summary and discussion
• Disclosure statement

文章来源

类型: 期刊论文

作者: JIAO Yang,WU Renguang

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

来源: Atmospheric and Oceanic Science Letters 2019年03期

年度: 2019

分类: 基础科学

专业: 气象学

单位: Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences,College of Earth and Planetary Sciences, University of Chinese Academy of Sciences,State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences

基金: supported by the National Natural Science Foundation of China [grant numbers 41530425,41721004,41475081,and 41775080]

分类号: P461

页码: 155-161

总页数: 7

文件大小: 1175K

下载量: 8