globalchange  > 过去全球变化的重建
DOI: 10.1007/s00382-012-1629-0
Scopus记录号: 2-s2.0-84881022881
论文题名:
Simulated impacts of the South Atlantic Ocean Dipole on summer precipitation at the Guinea Coast
作者: Nnamchi H.C.; Li J.; Kang I.-S.; Kucharski F.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 41, 期:2017-03-04
起始页码: 677
结束页码: 694
语种: 英语
英文关键词: Air-sea interactions ; Atlantic Niño ; Atlantic Ocean ; Climate modelling ; SST dipole ; West Africa
英文摘要: An intermediate complexity atmospheric general circulation model has been used to investigate the influence of the South Atlantic Ocean (SAO) dipole (SAOD) on summer precipitation over the Guinea Coast of West Africa. Two ensemble integrations in which idealized but realistic SAOD-type sea surface temperature (SST) anomaly is prescribed only in the SAO, and then globally are performed and inter-compared. Consistently, above (below) the average precipitation is simulated over the Guinea Coast during the positive (negative) phase of the SAOD. Comparison of the two set of experiments reveal that in its active years, the SAOD is a dominant mechanism that shapes the spatial character of summer precipitation at the Guinea coast, the global SST variability merely slightly moderate its effects. During the SAOD, cool SST anomaly in the extra-tropical SAO off the Brazil-Uruguay-Argentina coast gives rise to suppressed convection and mass divergence. In turn, the subsidence tends to amplify the sub-tropical arm of anomalous Hadley-type circulation and consequently large scale convection and mass flux convergence in the equatorial Atlantic Ocean/Gulf of Guinea region bordering on the coastal fringes of West Africa. Precipitation is therefore increased at the Guinea Coast. © 2012 Springer-Verlag Berlin Heidelberg.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54833
Appears in Collections:过去全球变化的重建

Files in This Item:

There are no files associated with this item.


作者单位: State Key Laboratory of Numerical Modelling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Graduate University of the Chinese Academy of Sciences, Beijing, China; School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea; Earth System Physics Section, Abdus Salam International Center for Theoretical Physics, Trieste, Italy

Recommended Citation:
Nnamchi H.C.,Li J.,Kang I.-S.,et al. Simulated impacts of the South Atlantic Ocean Dipole on summer precipitation at the Guinea Coast[J]. Climate Dynamics,2013-01-01,41(2017-03-04)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Nnamchi H.C.]'s Articles
[Li J.]'s Articles
[Kang I.-S.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Nnamchi H.C.]'s Articles
[Li J.]'s Articles
[Kang I.-S.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Nnamchi H.C.]‘s Articles
[Li J.]‘s Articles
[Kang I.-S.]‘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.