DOI: 10.1175/JCLI-D-14-00483.1
Scopus记录号: 2-s2.0-84944035444
论文题名: The impact of ENSO on the south Atlantic subtropical dipole mode
作者: Rodrigues R.R. ; Campos E.J. ; Haarsma R.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 7 起始页码: 2691
结束页码: 2705
语种: 英语
Scopus关键词: Atmospheric pressure
; Atmospheric temperature
; Nickel
; Oceanography
; Surface waters
; Tropics
; Atmospheric variability
; Coupled models
; ENSO
; Ocean atmosphere variability
; Oceanic variabilities
; Sea surface temperature anomalies
; South Atlantic
; Southeastern South America
; Climatology
; air-sea interaction
; atmosphere-ocean system
; computer simulation
; El Nino
; El Nino-Southern Oscillation
; La Nina
; numerical model
; sea surface temperature
; teleconnection
; Atlantic Ocean
; Atlantic Ocean (South)
; Pacific Ocean
; Pacific Ocean (Central)
英文摘要: The impact of El Niño-Southern Oscillation (ENSO) on the South Atlantic subtropical dipole mode (SASD) is investigated using both observations and model simulations. The SASD is the dominant mode of coupled ocean-atmosphere variability in the South Atlantic. This study focuses on austral summer, when both ENSO and SASD peak. It is shown that negative SASD events are associated with central Pacific El Niño events by triggering the Pacific-South American wave train (PSA). The latter resembles the third leading mode of atmospheric variability in the Southern Hemisphere (PSA2) and causes a weakening and meridional shift of the South Atlantic subtropical high, which then generates the negative SASD events. On the other hand, a strengthening of the South Atlantic subtropical high related to central La Niña teleconnections causes positive SASD events. The results herein show that the PSA2, triggered by central Pacific ENSO events, connects the tropical Pacific to the Atlantic. This connection is absent from eastern Pacific ENSO events, which appear to initiate the second leading mode of atmospheric variability in the Southern Hemisphere (PSA1). It is for this reason that previous studies have found weak correlations between ENSO and SASD. These findings can improve the climate prediction of southeastern South America and southern Africa since these regions are affected by sea surface temperature anomalies of both the Pacific and Atlantic Oceans. © 2015 American Meteorological Society. 资助项目: FAPESP, Fundação de Amparo à Pesquisa do Estado de São Paulo
; FAPESP, Fundação de Amparo à Pesquisa do Estado de São Paulo
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50551
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Geosciences, Federal University of Santa Catarina, Florianópolis, Brazil; Oceanographic Institute, University of São Paulo, São Paulo, Brazil; Royal Netherlands Meteorological Institute, De Bilt, Netherlands
Recommended Citation:
Rodrigues R.R.,Campos E.J.,Haarsma R.. The impact of ENSO on the south Atlantic subtropical dipole mode[J]. Journal of Climate,2015-01-01,28(7)