干旱区生态环境知识资源中心(Arid): Surface energy fluxes on Chilean glaciers: measurements and models

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DOI	10.5194/tc-14-2545-2020
	Surface energy fluxes on Chilean glaciers: measurements and models
	Schaefer, Marius; Fonseca-Gallardo, Duilio; Farias-Barahona, David; Casassa, Gino
通讯作者	Schaefer, M
来源期刊	CRYOSPHERE
ISSN	1994-0416
EISSN	1994-0424
出版年	2020
卷号	14 期号:8 页码:2545-2565
英文摘要	The surface energy fluxes of glaciers determine surface melt, and their adequate parametrization is one of the keys to a successful prediction of future glacier mass balance and freshwater discharge. Chile hosts glaciers in a large range of latitudes under contrasting climatic settings: from 18 degrees S in the Atacama Desert to 55 degrees S on Tierra del Fuego. Using three different methods, we computed surface energy fluxes for five glaciers which represent the main glaciological zones of Chile. We found the main energy sources for surface melt change from the Central Andes, where the net shortwave radiation is driving the melt, to Patagonia, where the turbulent fluxes are an important source of energy. We inferred higher surface melt rates for Patagonian glaciers as compared to the glaciers of the Central Andes due to a higher contribution of the turbulent sensible heat flux, less negative net longwave radiation and a positive contribution of the turbulent latent heat flux. The variability in the atmospheric emissivity was high and not able to be explained exclusively by the variability in the inferred cloud cover. The influence of the stability correction and the roughness length on the magnitude of the turbulent fluxes in the different climate settings was examined. We conclude that, when working towards physical melt models, it is not sufficient to use the observed melt as a measure of model performance; the model parametrizations of individual components of the energy balance have to be validated individually against measurements.
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	SCI-E
WOS记录号	WOS:000562092100001
WOS关键词	JUNCAL NORTE GLACIER ; MASS-BALANCE ; SEMIARID ANDES ; SPECTRAL ALBEDO ; LAKE DISTRICT ; SNOW ; PATAGONIA ; ABLATION ; CLIMATE ; MEGADROUGHT
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325784
作者单位	[Schaefer, Marius; Fonseca-Gallardo, Duilio] Univ Austral Chile, Fac Ciencias, Inst Ciencias Fis & Matemat, Valdivia, Chile; [Farias-Barahona, David] Friedrich Alexander Univ Erlangen Nurnberg, Inst Geog, Erlangen, Germany; [Casassa, Gino] Minist Obras Publ, Direcc Gen Aguas, Santiago, Chile; [Casassa, Gino] Univ Magallanes, Ctr Invest Gaia Antart, Punta Arenas, Chile
推荐引用方式 GB/T 7714	Schaefer, Marius,Fonseca-Gallardo, Duilio,Farias-Barahona, David,et al. Surface energy fluxes on Chilean glaciers: measurements and models[J],2020,14(8):2545-2565.
APA	Schaefer, Marius,Fonseca-Gallardo, Duilio,Farias-Barahona, David,&Casassa, Gino.(2020).Surface energy fluxes on Chilean glaciers: measurements and models.CRYOSPHERE,14(8),2545-2565.
MLA	Schaefer, Marius,et al."Surface energy fluxes on Chilean glaciers: measurements and models".CRYOSPHERE 14.8(2020):2545-2565.