DOI: 10.1002/joc.5865
Scopus记录号: 2-s2.0-85055060263
论文题名: Modelling the role of Atlantic air–sea interaction in the impact of Madden–Julian Oscillation on South American climate
作者: Barreiro M. ; Sitz L. ; de Mello S. ; Franco R.F. ; Renom M. ; Farneti R.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2019
卷: 39, 期: 2 起始页码: 1104
结束页码: 1116
语种: 英语
英文关键词: air–sea interaction
; MJO
; regional climate model
; South America
; teleconnections
Scopus关键词: Atmospheric temperature
; Climatology
; Heat flux
; Oceanography
; Surface waters
; Atmospheric teleconnections
; Regional climate modeling
; Sea surface temperature (SST)
; South America
; South atlantic convergence zones
; Surface air temperatures
; Teleconnections
; Temperature signal
; Climate models
; air-sea interaction
; climate modeling
; Madden-Julian oscillation
; regional climate
; sea surface temperature
; seasonal variation
; teleconnection
; Brazil
英文摘要: This study addresses the role of Atlantic air–sea interaction in the remote influence of the Madden–Julian Oscillation (MJO) on eastern South American climate during austral summertime. To disentangle the different processes involved, reanalysis data as well as a regional climate model run in coupled mode and as a stand-alone atmosphere are used. The simulations are able to represent the observed influences of the MJO in precipitation and surface air temperature. In particular, in both setups the model is able to represent adequately the atmospheric teleconnections associated with the MJO, which involves the development of a barotropic cyclonic anomaly over South America between 30°S and 60°S, which favours a southwards shift of the South Atlantic Convergence Zone (SACZ) and a warming in eastern Brazil. Moreover, model simulations support the hypothesis that air–sea interaction is important to set up the strength of the rainfall response in the SACZ. That is, the development of a local warm SST anomaly forced by heat flux anomalies associated with the direct MJO impact in turn feeds back into the atmosphere generating a stronger surface convergence that shifts the SACZ southwards. In the absence of this SST-forced response the SACZ still shifts southwards, but anomalies are much weaker and less extensive. We also found that the coupled model represents more adequately the remotely forced MJO temperature signal over eastern Brazil, probably due to a too strong response of the stand-alone model to prescribed sea surface temperature. © 2018 Royal Meteorological Society
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116560
Appears in Collections: 全球变化的国际研究计划
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作者单位: Departamento de Ciencias de la Atmósfera, Facultad de Ciencias, Universidad de la RepublicaMontevideo, Uruguay; Earth System Physics Section, The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy; Rossby Centre, Swedish Meteorological and Hydrological Institute, Norrköpping, Sweden; Universidad Nacional del Sur, Bahia Blanca, Argentina; Instituto Nazionale di Oceanografia e di Geofisica Sperimentale, Trieste, Italy
Recommended Citation:
Barreiro M.,Sitz L.,de Mello S.,et al. Modelling the role of Atlantic air–sea interaction in the impact of Madden–Julian Oscillation on South American climate[J]. International Journal of Climatology,2019-01-01,39(2)