DOI: 10.1016/j.gloplacha.2012.10.010
论文题名: Impact of prolonged La Niña events on the Indian Ocean with a special emphasis on southwest Tropical Indian Ocean SST
作者: Singh P. ; Chowdary J.S. ; Gnanaseelan C.
刊名: Global and Planetary Change
ISSN: 0921-8344
出版年: 2013
卷: 100 起始页码: 28
结束页码: 37
语种: 英语
英文关键词: Air-sea interaction
; El Niño
; La Niña
; Rossby Waves
; Tropical Indian Ocean
Scopus关键词: Air sea interactions
; Climatic shifts
; Dominant mechanism
; Equatorial Indian Ocean
; Heat transport
; Indian ocean
; Local surfaces
; Madagascar
; Reanalysis
; Rossby wave
; Sea surface temperature anomalies
; Surface heat fluxes
; Surface wind anomalies
; Teleconnections
; TiO
; Tropical Indian ocean
; Winter time
; Atmospheric temperature
; Ocean currents
; Nickel compounds
; air-sea interaction
; climate change
; El Nino
; heat flux
; La Nina
; rainfall
; Rossby wave
; sea surface temperature
; seasonality
; surface flux
; surface wind
; teleconnection
; upwelling
; Indian Ocean
; Indian Ocean (Equatorial)
; Indian Ocean (Tropical)
; Madagascar
英文摘要: This study examines the mechanisms governing the teleconnections associated with the long-lived La Niña variability in the tropical Indian Ocean (TIO) sea surface temperature (SST) anomalies using observational and reanalysis products. Two long-lived La Niña events (1973 to 1976 and 1998 to 2001) are observed in the recent years, one falling before and the other after the mid 1970's climatic shift. The winter (boreal) and spring (November to April) TIO SST is highly influenced by long-lived La Niña forcing. Climatic shift in mid 1970s contributes to the changes in TIO SST pattern during these two long-lived La Niña events. Surface heat flux variations due to long-lived La Niña contribute to the SST changes except in the southwest TIO. The upwelling favorable local surface wind stress curl and upwelling Rossby waves originating from the east are the dominant mechanisms responsible for the La Niña related winter time SST cooling over the southwest TIO. Long-lived La Niña induced surface wind anomalies enhance the fall Wyrtki Jet in the equatorial Indian Ocean resulting large scale anomalous heat transport. Local SST cooling reduces convection and contributes to the low rainfall over southwest TIO and the northern parts of Madagascar Island. © 2012 Elsevier B.V.. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84868316159&doi=10.1016%2fj.gloplacha.2012.10.010&partnerID=40&md5=b6e8af766afe982749f04acd40d0f1b6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11250
Appears in Collections: 全球变化的国际研究计划
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作者单位: Indian Institute of Tropical Meteorology, Pune, 411008, India
Recommended Citation:
Singh P.,Chowdary J.S.,Gnanaseelan C.. Impact of prolonged La Niña events on the Indian Ocean with a special emphasis on southwest Tropical Indian Ocean SST[J]. Global and Planetary Change,2013-01-01,100.