globalchange  > 气候减缓与适应
DOI: 10.1029/2017JC013540
Scopus记录号: 2-s2.0-85051123217
论文题名:
Subseasonal Coastal-Trapped Wave Propagations in the Southeastern Pacific and Atlantic Oceans: 2. Wave Characteristics and Connection With the Equatorial Variability
作者: Illig S.; Bachèlery M.-L.; Cadier E.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期:6
起始页码: 3942
结束页码: 3961
语种: 英语
英文关键词: altimetry ; Coastal Trapped Waves ; Eastern Boundary Upwelling Systems ; linear coastal model ; model experimentation ; subseasonal variability
英文摘要: The objective of this study is to compare the characteristics of the oceanic teleconnection with the linear equatorial dynamics of two upwelling systems along the southwestern South American and African continents at subseasonal time scales (<120 days). Altimetric data analysis shows that the coastal variability remains coherent with the equatorial signal until 27°S in the southeastern Pacific (SEP), while in the southeastern Atlantic (SEA) it fades out south of 12°S. To explain this striking difference, our methodology is based on the experimentation with twin regional model configurations of the SEP and SEA Oceans. The estimation of free Coastal-Trapped Waves (CTWs) modal structures and associated contribution to coastal variability allows inferring and comparing the characteristics of each CTW mode in the two systems; namely, their forcings, amplitude, dissipation rate, and scattering. Results show that the Pacific subseasonal equatorial forcing is only 20% larger than in the Atlantic, but important differences in the relative contribution of each baroclinic mode are reported. The first baroclinic mode dominates the eastern equatorial Pacific variability, while in the eastern equatorial Atlantic, the second mode is the most energetic. This leads to a drastic increase in the dissipation and scattering of the remotely forced CTW in the SEA sector, compared to the coastal SEP. Concomitantly, south of 15°S, the subseasonal coastal wind stress forcing is substantially more energetic in the SEA and participates in breaking the link between the equatorial forcing and the coastal variability. Our results are consistent with the solutions of a simple multimode CTW model. © 2018. 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/113738
Appears in Collections:气候减缓与适应

Files in This Item:

There are no files associated with this item.


作者单位: Laboratoire d'Etudes en Géophysique et Océanographie Spatiale (LEGOS), CNRS/IRD/UPS/CNES, Toulouse, France; Department of Oceanography, MARE Institute, LMI ICEMASA, University of Cape TownCape Town, South Africa; Nansen-Tutu Centre, Marine Research Institute, Department of Oceanography, University of Cape Town, Cape Town, South Africa

Recommended Citation:
Illig S.,Bachèlery M.-L.,Cadier E.. Subseasonal Coastal-Trapped Wave Propagations in the Southeastern Pacific and Atlantic Oceans: 2. Wave Characteristics and Connection With the Equatorial Variability[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(6)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Illig S.]'s Articles
[Bachèlery M.-L.]'s Articles
[Cadier E.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Illig S.]'s Articles
[Bachèlery M.-L.]'s Articles
[Cadier E.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Illig S.]‘s Articles
[Bachèlery M.-L.]‘s Articles
[Cadier E.]‘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.