气候变化领域集成服务门户(CCPortal): Evaluation of the snow regime in dynamic vegetation land surface models using field measurements

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DOI	10.5194/tc-8-487-2014
	Evaluation of the snow regime in dynamic vegetation land surface models using field measurements
	Kantzas E.; Quegan S.; Lomas M.; Zakharova E.
发表日期	2014
ISSN	19940416
卷号	8 期号:2
英文摘要	An increasing number of studies have demonstrated significant climatic and ecological changes occurring in the northern latitudes over the past decades. As coupled Earth-system models attempt to describe and simulate the dynamics and complex feedbacks of the Arctic environment, it is important to reduce their uncertainties in short-term predictions by improving the description of both system processes and its initial state. This study focuses on snow-related variables and makes extensive use of a historical data set (1966-1996) of field snow measurements acquired across the extent of the former Soviet Union to evaluate a range of simulated snow metrics produced by several land surface models, most of them embedded in IPCC-standard climate models. We reveal model-specific failings in simulating snowpack properties such as magnitude, inter-annual variability, timings of snow water equivalent and evolution of snow density. We develop novel and model-independent methodologies that use the field snow measurements to extract the values of fresh snow density and snowpack sublimation, and exploit them to assess model outputs. By directly forcing the surface heat exchange formulation of a land surface model with field data on snow depth and snow density, we evaluate how inaccuracies in simulating snow metrics affect soil temperature, thaw depth and soil carbon decomposition. We also show how field data can be assimilated into models using optimization techniques in order to identify model defects and improve model performance. © Author(s) 2014.
学科领域	accuracy assessment; annual variation; climate change; climate modeling; density; land surface; optimization; simulation; snow cover; vegetation cover; USSR
语种	英语
scopus关键词	accuracy assessment; annual variation; climate change; climate modeling; density; land surface; optimization; simulation; snow cover; vegetation cover; USSR
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/120139
作者单位	Centre for Terrestrial Carbon Dynamics, National Centre for Earth Observation, University of Sheffield, Hicks Building, Hounsfield Rd, Sheffield S37RH, United Kingdom; Centre Nationale de la Recherche Scientifique (CNRS), Laboratoire d'etudes en Geophysique et Oceanographie Spatiales (LEGOS), Universite Paul Sabatier Toulouse III, 14, avenue Edouard Belin, 31400 Toulouse, France
推荐引用方式 GB/T 7714	Kantzas E.,Quegan S.,Lomas M.,et al. Evaluation of the snow regime in dynamic vegetation land surface models using field measurements[J],2014,8(2).
APA	Kantzas E.,Quegan S.,Lomas M.,&Zakharova E..(2014).Evaluation of the snow regime in dynamic vegetation land surface models using field measurements.Cryosphere,8(2).
MLA	Kantzas E.,et al."Evaluation of the snow regime in dynamic vegetation land surface models using field measurements".Cryosphere 8.2(2014).