气候变化领域集成服务门户(CCPortal): Local topography increasingly influences the mass balance of a retreating cirque glacier

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DOI	10.5194/tc-12-2109-2018
	Local topography increasingly influences the mass balance of a retreating cirque glacier
	Florentine C.; Harper J.; Fagre D.; Moore J.; Peitzsch E.
发表日期	2018
ISSN	19940416
卷号	12 期号:6
英文摘要	Local topographically driven processes - such as wind drifting, avalanching, and shading - are known to alter the relationship between the mass balance of small cirque glaciers and regional climate. Yet partitioning such local effects from regional climate influence has proven difficult, creating uncertainty in the climate representativeness of some glaciers. We address this problem for Sperry Glacier in Glacier National Park, USA, using field-measured surface mass balance, geodetic constraints on mass balance, and regional climate data recorded at a network of meteorological and snow stations. Geodetically derived mass changes during 1950-1960, 1960-2005, and 2005-2014 document average mass change rates during each period at -0.22 ± 0.12, -0.18 ± 0.05, and -0.10 ± 0.03 m w.e. yr-1, respectively. A correlation of field-measured mass balance and regional climate variables closely (i.e., within 0.08 m w.e. yr-1) predicts the geodetically measured mass loss from 2005 to 2014. However, this correlation overestimates glacier mass balance for 1950-1960 by +1.20 ± 0.95 m w.e. yr-1. Our analysis suggests that local effects, not represented in regional climate variables, have become a more dominant driver of the net mass balance as the glacier lost 0.50 km2 and retreated further into its cirque. © Author(s) 2018.
学科领域	cirque; climate variation; glacier mass balance; ice retreat; regional climate; topography; Glacier National Park [Montana]; Montana; Sperry Glacier; United States
语种	英语
scopus关键词	cirque; climate variation; glacier mass balance; ice retreat; regional climate; topography; Glacier National Park [Montana]; Montana; Sperry Glacier; United States
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/119123
作者单位	U.S. Geological Survey, Northern Rocky Mountain Science Center, West Glacier, MT 59936, United States; Department of Geosciences, University of Montana, Missoula, MT 59801, United States
推荐引用方式 GB/T 7714	Florentine C.,Harper J.,Fagre D.,et al. Local topography increasingly influences the mass balance of a retreating cirque glacier[J],2018,12(6).
APA	Florentine C.,Harper J.,Fagre D.,Moore J.,&Peitzsch E..(2018).Local topography increasingly influences the mass balance of a retreating cirque glacier.Cryosphere,12(6).
MLA	Florentine C.,et al."Local topography increasingly influences the mass balance of a retreating cirque glacier".Cryosphere 12.6(2018).