气候变化领域集成服务门户(CCPortal): Major Issues in Simulating Some Arctic Snowpack Properties Using Current Detailed Snow Physics Models: Consequences for the Thermal Regime and Water Budget of Permafrost

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DOI	10.1029/2018MS001445
	Major Issues in Simulating Some Arctic Snowpack Properties Using Current Detailed Snow Physics Models: Consequences for the Thermal Regime and Water Budget of Permafrost
	Domine F.; Picard G.; Morin S.; Barrere M.; Madore J.-B.; Langlois A.
发表日期	2019
ISSN	19422466
起始页码	34
结束页码	44
卷号	11 期号:1
英文摘要	Accurately simulating the physical properties of Arctic snowpacks is essential for modeling the surface energy budget and the permafrost thermal regime. We show that the detailed snow physics models Crocus and SNOWPACK cannot simulate critical snow physical variables. Both models simulate basal layers with high density and high thermal conductivity, and top layers with low values for both variables, while field measurements yield opposite results. We explore the impact of an inverted snow stratigraphy on the permafrost thermal regime at a high Arctic site using a simplified heat transfer model and idealized snowpacks with three layers. One snowpack has a typical Arctic stratification with a low-density insulating basal layer, while the other (called Alpine-type snowpack) has a dense conducting basal layer. Snowpack stratification impacts simulated ground temperatures at 5 cm depth by less than 0.3 °C. Heat conduction through layered snowpacks is therefore determined by thermal insulance rather than by stratification. Ground dehydration caused by upward water vapor diffusion is 4 times greater under Arctic stratification, leading to a larger latent heat loss, but also to a lower soil thermal conductivity caused by ice loss, so that the overall effect of dehydration on ground temperature is uncertain. Snowpack stratification is found to affect snow surface temperature by up to 4 °C. Lastly, different snow metamorphism rates lead to a lower Alpine snowpack albedo, contributing to a warmer ground. Quantifying all these effects is needed for adequately simulating permafrost temperature. This requires the development of a snow and soil model that describes water vapor fluxes. ©2018. The Authors.
英文关键词	Arctic; model; permafrost; snow; temperature; water vapor
语种	英语
scopus关键词	Budget control; Dehydration; Heat conduction; Models; Permafrost; Snow; Stratigraphy; Temperature; Water vapor; Arctic; Ground temperature; Heat transfer model; High thermal conductivity; Snow surface temperature; Soil thermal conductivity; Surface energy budget; Water vapor diffusion; Thermal conductivity; alpine environment; numerical model; permafrost; simulation; snow cover; snowpack; stratification; temperature effect; thermal conductivity; thermal regime; water budget; water vapor; Arctic; Crocus
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/157001
作者单位	Takuvik Joint International Laboratory, Université Laval (Canada) and CNRS-INSU (France), Québec City, QC, Canada; Centre d'Études Nordiques, Université Laval, Québec City, QC, Canada; Department of Chemistry, Université Laval, Québec City, QC, Canada; Department of Geography, Université Laval, Québec City, QC, Canada; Université Grenoble Alpes, CNRS, IGE, Grenoble, France; Université Grenoble Alpes, Université de Toulouse, Météo-France, CNRS, CNRM, Centre d'Etudes de la Neige, Grenoble, France; CARTEL, Université de Sherbrooke, Sherbrooke, QC, Canada
推荐引用方式 GB/T 7714	Domine F.,Picard G.,Morin S.,et al. Major Issues in Simulating Some Arctic Snowpack Properties Using Current Detailed Snow Physics Models: Consequences for the Thermal Regime and Water Budget of Permafrost[J],2019,11(1).
APA	Domine F.,Picard G.,Morin S.,Barrere M.,Madore J.-B.,&Langlois A..(2019).Major Issues in Simulating Some Arctic Snowpack Properties Using Current Detailed Snow Physics Models: Consequences for the Thermal Regime and Water Budget of Permafrost.Journal of Advances in Modeling Earth Systems,11(1).
MLA	Domine F.,et al."Major Issues in Simulating Some Arctic Snowpack Properties Using Current Detailed Snow Physics Models: Consequences for the Thermal Regime and Water Budget of Permafrost".Journal of Advances in Modeling Earth Systems 11.1(2019).