globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2015JD023748
论文题名:
Atmospheric responses to idealized urban land surface forcing in eastern China during the boreal spring
作者: Deng J.; Xu H.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2015
卷: 120, 期:19
起始页码: 10022
结束页码: 10039
语种: 英语
英文关键词: East Asian climate ; East Asian subtropical jet stream ; large-scale atmospheric responses ; modeling ; urban land surface forcing ; wave activity
Scopus关键词: air temperature ; airflow ; atmospheric circulation ; atmospheric modeling ; atmospheric wave ; cooling ; jet stream ; land surface ; moisture transfer ; regional climate ; temperature gradient ; troposphere ; urban area ; warming ; westerly ; China ; Huai River ; Japan ; South Korea ; Yangtze Valley
英文摘要: In contrast to the impacts of anthropogenic aerosols and greenhouse gases, little is known about the impact of urban land surface forcing (ULSF) on large-scale atmospheric circulation. This study explores atmospheric responses to idealized ULSF in eastern China during the boreal spring using the Community Atmosphere Model version 5.1 coupled with the Community Land Model version 4. Results show that the ULSF leads to an increased air temperature in northern China both near the surface and in the lower troposphere. Related to a strong thermal feedback loop, a middle-upper tropospheric cooling is found in eastern China while a relatively strong warming occurs in the middle-high latitudes, which acts to enhance the meridional temperature gradient to the north of the source region and then shifts the East Asian subtropical jet stream (EASJ) southward. A weakened southwesterly in the lower troposphere in southern China slows down moisture transportation to northern China, and the southward shifted EASJ induces strong anomalous sinking motion to the north of the Yangtze River Valley (YRV). The associated changes in moisture and vertical airflow result in moisture divergence along the YRV and convergence in southern China. Thus, the spring rain belt is shifted southward, as characterized by below-normal rainfall extending from the Huai River Valley to South Korea and above-normal rainfall from southern China to the south coast of Japan. In addition, analysis of the upper tropospheric wave activity signifies that large-scale atmospheric responses due to the ULSF also exert an important influence on local climate. ©2015. American Geophysical Union. All Rights Reserved.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62995
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

Files in This Item:

There are no files associated with this item.


作者单位: Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, China; Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing, China; College of Atmospheric Sciences, Nanjing University of Information Science and Technology, Nanjing, China

Recommended Citation:
Deng J.,Xu H.. Atmospheric responses to idealized urban land surface forcing in eastern China during the boreal spring[J]. Journal of Geophysical Research: Atmospheres,2015-01-01,120(19)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Deng J.]'s Articles
[Xu H.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Deng J.]'s Articles
[Xu H.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Deng J.]‘s Articles
[Xu H.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

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