气候变化领域集成服务门户(CCPortal): Two years with extreme and little snowfall: Effects on energy partitioning and surface energy exchange in a high-Arctic tundra ecosystem

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DOI	10.5194/tc-10-1395-2016
	Two years with extreme and little snowfall: Effects on energy partitioning and surface energy exchange in a high-Arctic tundra ecosystem
	Stiegler C.; Lund M.; Røjle Christensen T.; Mastepanov M.; Lindroth A.
发表日期	2016
ISSN	19940416
卷号	10 期号:4
英文摘要	Snow cover is one of the key factors controlling Arctic ecosystem functioning and productivity. In this study we assess the impact of strong variability in snow accumulation during 2 subsequent years (2013-2014) on the land-atmosphere interactions and surface energy exchange in two high-Arctic tundra ecosystems (wet fen and dry heath) in Zackenberg, Northeast Greenland. We observed that record-low snow cover during the winter 2012/2013 resulted in a strong response of the heath ecosystem towards low evaporative capacity and substantial surface heat loss by sensible heat fluxes (H) during the subsequent snowmelt period and growing season. Above-average snow accumulation during the winter 2013/2014 promoted summertime ground heat fluxes (G) and latent heat fluxes (LE) at the cost of H. At the fen ecosystem a more muted response of LE, H and G was observed in response to the variability in snow accumulation. Overall, the differences in flux partitioning and in the length of the snowmelt periods and growing seasons during the 2 years had a strong impact on the total accumulation of the surface energy balance components. We suggest that in a changing climate with higher temperature and more precipitation the surface energy balance of this high-Arctic tundra ecosystem may experience a further increase in the variability of energy accumulation, partitioning and redistribution. © Author(s) 2016.
学科领域	arctic environment; ecosystem function; energy balance; fen; heathland; net ecosystem production; niche partitioning; snow accumulation; snow cover; snowmelt; surface energy; tundra; Arctic; Greenland; Zackenberg
语种	英语
scopus关键词	arctic environment; ecosystem function; energy balance; fen; heathland; net ecosystem production; niche partitioning; snow accumulation; snow cover; snowmelt; surface energy; tundra; Arctic; Greenland; Zackenberg
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/119623
作者单位	Department of Physical Geography and Ecosystem Science, Lund University, Sölvegatan 12, Lund, 223 62, Sweden; Arctic Research Centre, Department of Bioscience, Aarhus University, Frederiksborgvej 399, Roskilde, 4000, Denmark
推荐引用方式 GB/T 7714	Stiegler C.,Lund M.,Røjle Christensen T.,et al. Two years with extreme and little snowfall: Effects on energy partitioning and surface energy exchange in a high-Arctic tundra ecosystem[J],2016,10(4).
APA	Stiegler C.,Lund M.,Røjle Christensen T.,Mastepanov M.,&Lindroth A..(2016).Two years with extreme and little snowfall: Effects on energy partitioning and surface energy exchange in a high-Arctic tundra ecosystem.Cryosphere,10(4).
MLA	Stiegler C.,et al."Two years with extreme and little snowfall: Effects on energy partitioning and surface energy exchange in a high-Arctic tundra ecosystem".Cryosphere 10.4(2016).