中国科学院南海海洋研究所机构知识库
Advanced  
SCSIO OpenIR  > 海洋科技动态信息-印太暖池系统研究  > 期刊论文
学科主题: Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences; Oceanography
题名: A CGCM Study on the Northward Propagation of Tropical Intraseasonal Oscillation over the Asian Summer Monsoon Regions
作者: Weng, SP ; Yu, JY
通讯作者: znspw302@ntnu.edu.tw
关键词: Intraseasonal oscillation ; Atmosphere-ocean coupling ; Madden-Julian oscillation ; Indo-Pacific climate variability ; Easterly vertical shear
刊名: TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES
发表日期: 2010-01-01
卷: 21, 期:2, 页:299-312
收录类别: sci
部门归属: [Weng, Shu-Ping] Natl Taiwan Normal Univ, Dept Geog, Taipei, Taiwan; [Yu, Jin-Yi] Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA USA
摘要: This study performs numerical experiments to (1) examine the influences of Pacific and Indian Ocean couplings on the propagation of tropical intraseasonal oscillation (ISO) in the extended boreal summer (May-through-October) and (2) determine the relative contributions of the ocean coupling and internal atmospheric dynamics to the ISO propagation over the Asian-Pacific monsoon regions. For (1), three basin-coupling experiments are performed with a coupled atmosphere-ocean general circulation model (CGCM), in which the air-sea coupling is limited respectively to the Indian Ocean, the Pacific Ocean, and both the Indian and Pacific oceans. For (2), three forced experiments are performed with the atmospheric GCM (AGCM) component of the CGCM, in which the sea surface temperature (SST) climatologies are prescribed from the CGCM experiments. Using extended Empirical Orthogonal Function and composite analyses, the leading ISO modes are identified and compared between the observation and the model experiments. The CGCM modeling results show that the Indian ocean coupling is more important than the Pacific Ocean coupling to promoting both zonal and meridional propagations of the summertime ISO. In this season, the Indo-Pacific warm pool retracts westward and shifts into the Northern Hemisphere allowing the Indian Ocean coupling to become more important. The Indian Ocean coupling is found to promote the northward propagation mainly through wind-evaporation feedback, whereas in observations the cloud-radiation feedback is found to be equally important. The AGCM modeling results indicate that monsoonal dynamics aid the meridional ISO propagation mainly in the low-level winds. Without the ocean coupling, the northward ISO convection feature is weaker and is limited by the northern boundary of climatic easterly vertical shear. The ocean coupling enables the simulated ISO-related convections to cross the northern boundary of the shear. This modeling study concludes that the Indian Ocean coupling plays a crucial rather than a secondary role for the observed northward propagation of summertime ISO.
原文出处: 查看原文
内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/8399
Appears in Collections:海洋科技动态信息-印太暖池系统研究_期刊论文

Files in This Item:

There are no files associated with this item.


Recommended Citation:
Weng, SP; Yu, JY.A CGCM Study on the Northward Propagation of Tropical Intraseasonal Oscillation over the Asian Summer Monsoon Regions,TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES,2010,21(2):299-312
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Weng, SP]'s Articles
[Yu, JY]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Weng, SP]‘s Articles
[Yu, JY]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2017  中国科学院南海海洋研究所 - Feedback
Powered by CSpace