DOI: 10.1002/jgrd.50860
论文题名: Varying roles of ENSO and SAM on the Antarctic Peninsula climate in austral spring
作者: Clem K.R. ; Fogt R.L.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 20 起始页码: 11481
结束页码: 11492
语种: 英语
英文关键词: Antarctic Peninsula
; ENSO
; SAM
; teleconnection
Scopus关键词: Atmospheric pressure
; Tropics
; Antarctic Peninsula
; ENSO
; Regional circulation
; SAM
; Southern Annular Mode
; Southern oscillation index
; Teleconnections
; Temperature correlation
; Climatology
; air-sea interaction
; Antarctic Oscillation
; climate conditions
; climate forcing
; El Nino-Southern Oscillation
; regional climate
; spring (season)
; temporal variation
; warming
; Antarctic Peninsula
; Antarctica
; West Antarctica
英文摘要: Recent studies have identified a significant warming trend across West Antarctica and the Antarctic Peninsula, which is likely linked to tropical forcing. Here we investigate temporal variations in El Niño-Southern Oscillation (ENSO)-related tropical forcing and Southern Annular Mode (SAM)-related forcing on the Amundsen-Bellingshausen Seas Low and the regional climate during austral spring. We find a spatial dependency regarding the impacts each of these climate modes have on the Antarctic Peninsula: relationships with ENSO and Antarctic Peninsula climate are persistent and significant across the western Peninsula, while relationships with the SAM are persistent and significant across the northeastern Peninsula. Other ENSO/SAM-Peninsula temperature correlations appear weak since 1957 as they vary temporally, fluctuating in response to changing correlations between the SAM index and the Southern Oscillation Index in austral spring. Changes in the ENSO-SAM correlations are due primarily to the 1988 La Niña/SAM negative event, which significantly altered the location of the ENSO teleconnection in the South Pacific Ocean and, therefore, its influence on the regional climate. Whether or not there is decadal variability in the ENSO-SAM relationship remains unclear; however, it is evident that the influence across the Peninsula varies in both space and time, related to the strength and spatial extent of the response in the Amundsen-Bellingshausen Seas. This suggests that in order to accurately attribute the warming to ENSO-related tropical forcing, it is necessary to consider the role of the regional circulation manifested by the phase of each climate mode together. Key Points SAM persistently influences northeast Peninsula climate. ENSO persistently influences west Peninsula climate. Time-varying correlations are related to changes in ENSO-SAM relationship. ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63208
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Scalia Laboratory for Atmospheric Analysis, Department of Geography, Ohio University, Athens OH 45701, United States
Recommended Citation:
Clem K.R.,Fogt R.L.. Varying roles of ENSO and SAM on the Antarctic Peninsula climate in austral spring[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(20)