DOI: 10.1007/s00382-016-3321-2
Scopus记录号: 2-s2.0-84983732442
论文题名: Anomalous convective activity over sub-tropical east Pacific during 2015 and associated boreal summer monsoon teleconnections
作者: Mujumdar M. ; Sooraj K.P. ; Krishnan R. ; Preethi B. ; Joshi M.K. ; Varikoden H. ; Singh B.B. ; Rajeevan M.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2017
卷: 48, 期: 2017-11-12 起始页码: 4081
结束页码: 4091
语种: 英语
英文关键词: East Pacific storms
; Meridional SST gradient
; Pacific-monsoon teleconnection
; Sub-tropical east–west asymmetry
英文摘要: The eastern Pacific Ocean received a record highest number of sub-tropical convective activities during boreal summer (June–September) of 2015, since last four decades. The associated rainfall distribution was also atypical with anomalously enhanced rainfall extending from equator to sub-tropical central-eastern Pacific. The present analysis reveals a pronounced meridional sea surface temperature (SST) gradient across central-eastern Pacific, with the mean SST exceeding 28 °C over sub-tropical north Pacific, setting up favorable conditions for these enhanced convective activities. It is found that these anomalous features promoted northward spanning of westerly anomalies and drastically modified the east–west circulation over sub-tropical north Pacific. This seems to induce large-scale subsidence over the off-equatorial monsoon regions of south and south-east Asia, thus constituting an east–west asymmetry over sub-tropical Indo-Pacific region. Based on our observational study, it can be concluded that the sub-tropical convective activities over east Pacific may play a pivotal role in mediating the Pacific-monsoon teleconnection through the unexplored meridional SST gradient across Pacific. © 2016, Springer-Verlag Berlin Heidelberg. 资助项目: MoES, Ministry of Earth Sciences
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53197
Appears in Collections: 过去全球变化的重建
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作者单位: Centre for Climate Change Research (CCCR), Indian Institute of Tropical Meteorology (IITM), Pune, India; Ministry of Earth Sciences (MoES), New Delhi, India
Recommended Citation:
Mujumdar M.,Sooraj K.P.,Krishnan R.,et al. Anomalous convective activity over sub-tropical east Pacific during 2015 and associated boreal summer monsoon teleconnections[J]. Climate Dynamics,2017-01-01,48(2017-11-12)