干旱区生态环境知识资源中心(Arid): Long-term shifts in feedbacks among glacier surface change, melt generation and runoff, McMurdo Dry Valleys, Antarctica

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DOI	10.1002/hyp.14292
	Long-term shifts in feedbacks among glacier surface change, melt generation and runoff, McMurdo Dry Valleys, Antarctica
	Bergstrom, Anna; Gooseff, Michael; Fountain, Andrew; Hoffman, Matthew
通讯作者	Bergstrom, A (corresponding author), Boise State Univ, Dept Geosci, Boise, ID 83725 USA.
来源期刊	HYDROLOGICAL PROCESSES
ISSN	0885-6087
EISSN	1099-1085
出版年	2021
卷号	35 期号:8
英文摘要	Glaciers of the McMurdo dry valleys (MDVs) Antarctica are the main source of streamflow in this polar desert. Because summer air temperatures hover near 0 degrees C small changes in the energy balance strongly affect meltwater generation. Here we demonstrate that increased surface roughness, which alters the turbulent transfer of energy between the ice surface and atmosphere, yields a detectable increase in meltwater runoff. At low elevations on the glaciers, basin-like topography became significantly rougher over 13 years between repeat lidar surveys, yielding greater melt. In contrast, the smoother ice at higher elevation exhibited no detectable change in roughness. We pose a conceptual model of the cycle of glacier surface change as a result of climate forcing whereby glacier surfaces transition from being dominated by sublimation to becoming increasingly melt-dominated, which is reversible under prolonged cool periods. This research advances our understanding of warm season effects on polar glaciers.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000691011400027
WOS关键词	TAYLOR VALLEY ; SUPRAGLACIAL STREAMS ; CANADA GLACIER ; MASS-LOSS ; CLIMATE ; EVOLUTION ; ECOSYSTEM ; LANDSCAPE ; NETWORKS ; PATTERNS
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363536
作者单位	[Bergstrom, Anna; Gooseff, Michael] Univ Colorado, Inst Arctic & Alpine Res, Boulder, CO 80309 USA; [Fountain, Andrew] Portland State Univ, Dept Geol, Portland, OR 97207 USA; [Hoffman, Matthew] Los Alamos Natl Lab, Fluid Dynam Grp, Los Alamos, NM USA; [Bergstrom, Anna] Boise State Univ, Dept Geosci, Boise, ID 83725 USA
推荐引用方式 GB/T 7714	Bergstrom, Anna,Gooseff, Michael,Fountain, Andrew,et al. Long-term shifts in feedbacks among glacier surface change, melt generation and runoff, McMurdo Dry Valleys, Antarctica[J],2021,35(8).
APA	Bergstrom, Anna,Gooseff, Michael,Fountain, Andrew,&Hoffman, Matthew.(2021).Long-term shifts in feedbacks among glacier surface change, melt generation and runoff, McMurdo Dry Valleys, Antarctica.HYDROLOGICAL PROCESSES,35(8).
MLA	Bergstrom, Anna,et al."Long-term shifts in feedbacks among glacier surface change, melt generation and runoff, McMurdo Dry Valleys, Antarctica".HYDROLOGICAL PROCESSES 35.8(2021).