DOI: 10.1007/s00382-016-3364-4
Scopus记录号: 2-s2.0-84991383918
论文题名: Roles of tropical SST anomalies in modulating the western north Pacific anomalous cyclone during strong La Niña decaying years
作者: Chen Z. ; Wen Z. ; Wu R. ; Du Y.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2017
卷: 49, 期: 2017-01-02 起始页码: 633
结束页码: 647
语种: 英语
英文关键词: Central to eastern Pacific cooling
; Indo-western Pacific cyclone
; Strong La Niña
; Tropical SST anomalies
英文摘要: This study re-explores the roles of tropical SST anomalies in modulating the anomalous cyclone over the Indo-western Pacific during strong La Niña decaying years via a series of numerical experiments. The results suggest that central to eastern equatorial Pacific cooling, western north Pacific (WNP) warming, and Indian Ocean cooling all contribute to the Indo-western Pacific cyclonic wind anomalies. The WNP SST anomalies play a role via a Rossby wave-type response. As the positive SST anomalies in the WNP decay, the local forcing effect decays as well. The Indian Ocean remote forcing seems to play an important role during boreal summer via cold Kelvin wave induced cyclonic shear and boundary layer convergence. During strong La Niña decaying years, the negative SST anomalies in the equatorial central to eastern Pacific can maintain and persist into summer. Such cooling could induce anomalous Walker circulation with ascending branch over the Maritime Continent to Philippines and descending branch over central to eastern Pacific, which links the WNP climate to the equatorial central and eastern Pacific SST anomalies. The convective heating over the WNP induced remotely by central to eastern Pacific cooling in turn forces atmospheric Rossby wave to its west, which may amplify the anomalous cyclone over the Indo-western Pacific. © 2016, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53146
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China; Center for Monsoon and Environment Research/School of Atmospheric Sciences, Sun Yat-Sen University, Guangzhou, China; Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Chen Z.,Wen Z.,Wu R.,et al. Roles of tropical SST anomalies in modulating the western north Pacific anomalous cyclone during strong La Niña decaying years[J]. Climate Dynamics,2017-01-01,49(2017-01-02)