DOI: 10.5194/tc-10-1395-2016
Scopus记录号: 2-s2.0-84978802731
论文题名: Two years with extreme and little snowfall: Effects on energy partitioning and surface energy exchange in a high-Arctic tundra ecosystem
作者: Stiegler C ; , Lund M ; , Røjle Christensen T ; , Mastepanov M ; , Lindroth A
刊名: Cryosphere
ISSN: 19940416
出版年: 2016
卷: 10, 期: 4 起始页码: 1395
结束页码: 1413
语种: 英语
英文关键词: arctic environment
; ecosystem function
; energy balance
; fen
; heathland
; net ecosystem production
; niche partitioning
; snow accumulation
; snow cover
; snowmelt
; surface energy
; tundra
; Arctic
; Greenland
; Zackenberg
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75119
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Department of Physical Geography and Ecosystem Science, Lund University, Sölvegatan 12, Lund, Sweden; Arctic Research Centre, Department of Bioscience, Aarhus University, Frederiksborgvej 399, Roskilde, Denmark
Recommended Citation:
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]. Cryosphere,2016-01-01,10(4)