气候变化领域集成服务门户(CCPortal): Greenland Ice Sheet late-season melt: Investigating multiscale drivers of K-transect events

CCPortal

DOI	10.5194/tc-13-2241-2019
	Greenland Ice Sheet late-season melt: Investigating multiscale drivers of K-transect events
	Ballinger T.J.; Mote T.L.; Mattingly K.; Bliss A.C.; Hanna E.; Van As D.; Prieto M.; Gharehchahi S.; Fettweis X.; Noël B.; Smeets P.C.J.P.; Reijmer C.H.; Ribergaard M.H.; Cappelen J.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	2241
结束页码	2257
卷号	13 期号:8
英文摘要	One consequence of recent Arctic warming is an increased occurrence and longer seasonality of above-freezing air temperature episodes. There is significant disagreement in the literature concerning potential physical connectivity between high-latitude open water duration proximate to the Greenland Ice Sheet (GrIS) and late-season (i.e., end-of-summer and autumn) GrIS melt events. Here, a new date of sea ice advance (DOA) product is used to determine the occurrence of Baffin Bay sea ice growth along Greenland's west coast for the 2011-2015 period. Over the 2-month period preceding the DOA, northwest Atlantic Ocean and atmospheric conditions are analyzed and linked to late-season melt events observed at a series of on-ice automatic weather stations (AWSs) along the K-transect in southwestern Greenland. Surrounding ice sheet, tundra, and coastal winds from the Modèle Atmosphérique Régional (MAR) and Regional Atmospheric Climate Model (RACMO) provide high-resolution spatial context to AWS observations and are analyzed along with ERA-Interim reanalysis fields to understand the meso-to-synoptic-scale (thermo)dynamic drivers of the melt events. Results suggest that late-season melt events, which primarily occur in the ablation area, are strongly affected by ridging atmospheric circulation patterns that transport warm, moist air from the subpolar North Atlantic toward west Greenland. Increasing concentrations of North Atlantic water vapor are shown to be necessary to produce melt conditions as autumn progresses. While thermal conduction and advection off south Baffin Bay open waters impact coastal air temperatures, local marine air incursions are obstructed by barrier flows and persistent katabatic winds along the western GrIS margin. © 2019 Copernicus GmbH. All rights reserved.
语种	英语
来源期刊	The Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118846
作者单位	Department of Geography, Texas State University, San Marcos, TX, United States; Department of Geography, University of Georgia, Athens, GA, United States; College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR, United States; School of Geography and Lincoln Centre for Water and Planetary Health, University of Lincoln, Lincoln, United Kingdom; Geological Survey of Denmark and Greenland, Copenhagen, Denmark; Laboratory of Climatology, Department of Geography, University of Liège, Liège, Belgium; Institute for Marine and Atmospheric Research, Utrecht University, Utrecht, Netherlands; Danish Meteorological Institute, Copenhagen, Denmark
推荐引用方式 GB/T 7714	Ballinger T.J.,Mote T.L.,Mattingly K.,et al. Greenland Ice Sheet late-season melt: Investigating multiscale drivers of K-transect events[J],2019,13(8).
APA	Ballinger T.J..,Mote T.L..,Mattingly K..,Bliss A.C..,Hanna E..,...&Cappelen J..(2019).Greenland Ice Sheet late-season melt: Investigating multiscale drivers of K-transect events.The Cryosphere,13(8).
MLA	Ballinger T.J.,et al."Greenland Ice Sheet late-season melt: Investigating multiscale drivers of K-transect events".The Cryosphere 13.8(2019).