DOI: 10.1002/joc.5419
论文题名: Activity of the Southern Annular Mode during 2015–2016 El Niño event and its impact on Southern Hemisphere climate anomalies
作者: Vera C.S. ; Osman M.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38 起始页码: e1288
结束页码: e1295
语种: 英语
英文关键词: ENSO
; PSA patterns
; SAM
; southeastern South America
Scopus关键词: Nickel
; Circulation anomalies
; Climate predictability
; ENSO
; Precipitation anomalies
; PSA patterns
; Southeastern South America
; Surface air temperatures
; Western Antarctic Peninsula
; Climatology
; air-sea interaction
; Arctic Oscillation
; atmospheric circulation
; climate prediction
; climatology
; El Nino
; El Nino-Southern Oscillation
; Southern Hemisphere
; summer
英文摘要: Previous studies documented that El Niño (EN) events are in general associated with negative phases of the Southern Annular Mode (SAM). EN 2015–2016 (EN15–16) was one of the three strongest events ever recorded. However, it was associated with a SAM positive phase of extreme intensity. Furthermore, while the negative linear relationship between ENSO and SAM during the most recent period (1986–2014) was significant and associated with a narrow uncertainty band, the combined condition of both climate patterns in the EN15–16 event was an outlier. The EN15–16 influence on the austral summer circulation anomalies at the extratropical and polar regions of the Southern Hemisphere was considerably altered by the strong SAM positive phase, which was evident not only at the troposphere but also at the stratosphere. Such circulation changes resulted in unusual regional impacts, such as negative anomalies of surface air temperature in western Antarctic Peninsula and negative precipitation anomalies in southeastern South America, ever recorded for previous strong EN events. Further research is needed to better understand the mechanisms explaining the SAM behaviour during 2015–2016 and its implication for climate predictability on seasonal timescales. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116974
Appears in Collections: 气候减缓与适应
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作者单位: Departamento de Ciencias de la Atmósfera y los Océanos, Facultad de Ciencias Exactas y Naturales, Buenos Aires, Argentina; Centro de Investigaciones del Mar y la Atmósfera (CIMA), Instituto Franco-Argentino del Clima y sus Impactos (UMI-IFAECI)/CNRS, CONICET, Universidad de Buenos Aires, Buenos Aires, Argentina
Recommended Citation:
Vera C.S.,Osman M.. Activity of the Southern Annular Mode during 2015–2016 El Niño event and its impact on Southern Hemisphere climate anomalies[J]. International Journal of Climatology,2018-01-01,38