气候变化领域集成服务门户(CCPortal): Tropical and mid-latitude forcing of continental Antarctic temperatures

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DOI	10.5194/tc-9-2405-2015
	Tropical and mid-latitude forcing of continental Antarctic temperatures
	Turney C.S.M.; Fogwill C.J.; Klekociuk A.R.; Van Ommen T.D.; Curran M.A.J.; Moy A.D.; Palmer J.G.
发表日期	2015
ISSN	19940416
卷号	9 期号:6
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.
学科领域	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
语种	英语
scopus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
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119764
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 7050, Australia; Antarctic Climate and Ecosystems Cooperative Research Centre, University of Tasmania, Private Bag 80, Hobart, TAS 7001, Australia
推荐引用方式 GB/T 7714	Turney C.S.M.,Fogwill C.J.,Klekociuk A.R.,et al. Tropical and mid-latitude forcing of continental Antarctic temperatures[J],2015,9(6).
APA	Turney C.S.M..,Fogwill C.J..,Klekociuk A.R..,Van Ommen T.D..,Curran M.A.J..,...&Palmer J.G..(2015).Tropical and mid-latitude forcing of continental Antarctic temperatures.Cryosphere,9(6).
MLA	Turney C.S.M.,et al."Tropical and mid-latitude forcing of continental Antarctic temperatures".Cryosphere 9.6(2015).