气候变化领域集成服务门户(CCPortal): Effects of local advection on the spatial sensible heat flux variation on a mountain glacier

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DOI	10.5194/tc-10-2887-2016
	Effects of local advection on the spatial sensible heat flux variation on a mountain glacier
	Sauter T.; Peter Galos S.
发表日期	2016
ISSN	19940416
卷号	10 期号:6
英文摘要	Distributed mass balance models, which translate micrometeorological conditions into local melt rates, have proven deficient to reflect the energy flux variability on mountain glaciers. This deficiency is predominantly related to shortcomings in the representation of local processes in the forcing data. We found by means of idealized large-eddy simulations that heat advection, associated with local wind systems, causes small-scale sensible heat flux variations by up to 100ĝ€Wmĝ'2 during clear sky conditions. Here we show that process understanding at a few observation sites is insufficient to infer the wind and temperature distributions across the glacier. The glacier-wide hourly averaged sensible heat fluxes are both over- and underestimated by up to 16ĝ€Wmĝ'2 when using extrapolated temperature and wind fields. The sign and magnitude of the differences depend on the site selection, which is used for extrapolation as well as on the large-scale flow direction. Our results demonstrate how the shortcomings in the local sensible heat flux estimates are related to topographic effects and the insufficient characterization of the temperature advection process. © Author(s) 2016.
学科领域	advection; energy flux; glacier; glacier mass balance; large eddy simulation; mountain environment; sensible heat flux; site selection; spatial analysis; topography; wind direction; wind field
语种	英语
scopus关键词	advection; energy flux; glacier; glacier mass balance; large eddy simulation; mountain environment; sensible heat flux; site selection; spatial analysis; topography; wind direction; wind field
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/119537
作者单位	Climate System Research Group, Institute of Geography, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Erlangen, Germany; Institute of Atmospheric and Cryospheric Sciences, University of Innsbruck, Innsbruck, Austria
推荐引用方式 GB/T 7714	Sauter T.,Peter Galos S.. Effects of local advection on the spatial sensible heat flux variation on a mountain glacier[J],2016,10(6).
APA	Sauter T.,&Peter Galos S..(2016).Effects of local advection on the spatial sensible heat flux variation on a mountain glacier.Cryosphere,10(6).
MLA	Sauter T.,et al."Effects of local advection on the spatial sensible heat flux variation on a mountain glacier".Cryosphere 10.6(2016).