DOI: 10.5194/tc-9-2405-2015
Scopus记录号: 2-s2.0-84951973404
论文题名: Tropical and mid-latitude forcing of continental Antarctic temperatures
作者: Turney C ; S ; M ; , Fogwill C ; J ; , Klekociuk A ; R ; , Van Ommen T ; D ; , Curran M ; A ; J ; , Moy A ; D ; , Palmer J ; G
刊名: Cryosphere
ISSN: 19940416
出版年: 2015
卷: 9, 期: 6 起始页码: 2405
结束页码: 2415
语种: 英语
英文关键词: air mass
; Antarctic Ecozone
; atmospheric circulation
; atmospheric forcing
; climate prediction
; meridional circulation
; midlatitude environment
; proxy climate record
; snowmelt
; Southern Hemisphere
; temperature anomaly
; tropical region
; Antarctica
; East Antarctica
; Pacific Ocean
; South Pole
英文摘要: Future changes in atmospheric circulation and associated modes of variability are a major source of uncertainty in climate projections. Nowhere is this issue more acute than across the mid-latitudes to high latitudes of the Southern Hemisphere (SH), which over the last few decades have experienced extreme and regionally variable trends in precipitation, ocean circulation and temperature, with major implications for Antarctic ice melt and surface mass balance. Unfortunately there is a relative dearth of observational data, limiting our understanding of the driving mechanism(s). Here we report a new 130-year annually resolved record of δD - a proxy for temperature - from the geographic South Pole where we find a significant influence from extratropical pressure anomalies which act as "gatekeepers" to the meridional exchange of air masses. Reanalysis of global atmospheric circulation suggests these pressure anomalies play a significant influence on mid- to high-latitude SH climate, modulated by the tropical Pacific Ocean. This work adds to a growing body of literature confirming the important roles of tropical and mid-latitude atmospheric circulation variability on Antarctic temperatures. Our findings suggest that future increasing tropical warmth will strengthen meridional circulation, exaggerating current trends, with potentially significant impacts on Antarctic surface mass balance. © Author(s) 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75208
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Climate Change Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, Australia; Australian Antarctic Division, 203 Channel Highway, Kingston, TAS, Australia; Antarctic Climate and Ecosystems Cooperative Research Centre, University of Tasmania, Private Bag 80, Hobart, TAS, Australia
Recommended Citation:
Turney C,S,M,et al. Tropical and mid-latitude forcing of continental Antarctic temperatures[J]. Cryosphere,2015-01-01,9(6)