IOCAS-IR  > 海洋环流与波动重点实验室
Effect of Spatial Variation of Convective Adjustment Time on the Madden-Julian Oscillation: A Theoretical Model Analysis
Wang, Hui1,2; Wei, Yuntao3,4; Liu, Fei1,2
2017-10-01
Source PublicationATMOSPHERE
Volume8Issue:10
SubtypeArticle
AbstractThe observed convective adjustment time (CAT) associated with Madden-Julian Oscillation (MJO) precipitation is found to vary significantly in space. Here, we investigate the effect of different spatial distributions of CAT on MJO precipitation based on the frictional coupled dynamics moisture (FCDM) model. The results show that a large value of CAT tends to decrease the frequency and growth rate of eastward-propagating MJO-like mode in the FCDM model, delaying the occurrence of MJO deep convection and slowing down its eastward propagation. A large phase lag between circulation and convection decreases convective available potential energy (CAPE). In the observations, a small background vertical moisture gradient (BVMG) tends to increase the frequency associated with cold sea surface temperature (SST), while a large value of CAT tends to decrease the frequency. Due to their competing effect, the simulated frequency and phase speed remain the same when the convection moves from a warm to a cold SST region. The convection is heavily suppressed over the cold SST region due to the decreasing growth rate of unstable wavenumber-one mode with smaller BVMG and longer CAT. This theoretical finding should improve our understanding of MJO dynamics and simulation.
KeywordMadden-julian Oscillation Convective Adjustment Time Convective Relaxation Frequency Spatial Variation Frictionally Coupled Dynamics Moisture Model
DOI10.3390/atmos8100204
Indexed BySCI
Language英语
WOS IDWOS:000414847600024
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/143061
Collection海洋环流与波动重点实验室
Affiliation1.Nanjing Univ Informat Sci & Technol, Earth Syst Modeling Ctr, Nanjing 210044, Jiangsu, Peoples R China
2.Nanjing Univ Informat Sci & Technol, Climate Dynam Res Ctr, Nanjing 210044, Jiangsu, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wang, Hui,Wei, Yuntao,Liu, Fei. Effect of Spatial Variation of Convective Adjustment Time on the Madden-Julian Oscillation: A Theoretical Model Analysis[J]. ATMOSPHERE,2017,8(10).
APA Wang, Hui,Wei, Yuntao,&Liu, Fei.(2017).Effect of Spatial Variation of Convective Adjustment Time on the Madden-Julian Oscillation: A Theoretical Model Analysis.ATMOSPHERE,8(10).
MLA Wang, Hui,et al."Effect of Spatial Variation of Convective Adjustment Time on the Madden-Julian Oscillation: A Theoretical Model Analysis".ATMOSPHERE 8.10(2017).
Files in This Item:
File Name/Size DocType Version Access License
Effect of Spatial Va(1997KB)期刊论文出版稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wang, Hui]'s Articles
[Wei, Yuntao]'s Articles
[Liu, Fei]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang, Hui]'s Articles
[Wei, Yuntao]'s Articles
[Liu, Fei]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang, Hui]'s Articles
[Wei, Yuntao]'s Articles
[Liu, Fei]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Effect of Spatial Variation of Convective Adjustment Time on the Madden-Julian Oscillation_ A Theoretical Model Analysis.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

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