气候变化领域集成服务门户(CCPortal): Simulated single-layer forest canopies delay Northern Hemisphere snowmelt

CCPortal

DOI	10.5194/tc-13-3077-2019
	Simulated single-layer forest canopies delay Northern Hemisphere snowmelt
	Todt M.; Rutter N.; G. Fletcher C.; Wake L.M.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	3077
结束页码	3091
卷号	13 期号:11
英文摘要	Single-layer vegetation schemes in modern land surface models have been found to overestimate diurnal cycles in longwave radiation beneath forest canopies. This study introduces an empirical correction, based on forest-stand-scale simulations, which reduces diurnal cycles of sub-canopy longwave radiation. The correction is subsequently implemented in land-only simulations of the Community Land Model version 4.5 (CLM4.5) in order to assess the impact on snow cover. Nighttime underestimations of sub-canopy longwave radiation outweigh daytime overestimations, which leads to underestimated averages over the snow cover season. As a result, snow temperatures are underestimated and snowmelt is delayed in CLM4.5 across evergreen boreal forests. Comparison with global observations confirms this delay and its reduction by correction of sub-canopy longwave radiation. Increasing insolation and day length change the impact of overestimated diurnal cycles on daily average sub-canopy longwave radiation throughout the snowmelt season. Consequently, delay of snowmelt in land-only simulations is more substantial where snowmelt occurs early. © 2015 Royal Society of Chemistry. All rights reserved.
学科领域	boreal forest; day length; error correction; insolation; longwave radiation; model test; snow cover; snowmelt; vegetation cover
语种	英语
scopus关键词	boreal forest; day length; error correction; insolation; longwave radiation; model test; snow cover; snowmelt; vegetation cover
来源期刊	The Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118806
作者单位	Department of Geography, Northumbria University, Newcastle upon Tyne, United Kingdom; Department of Geography and Environmental Management, University of Waterloo, Waterloo, ON, Canada; National Centre for Atmospheric Science, Department of Meteorology, University of Reading, Reading, United Kingdom
推荐引用方式 GB/T 7714	Todt M.,Rutter N.,G. Fletcher C.,et al. Simulated single-layer forest canopies delay Northern Hemisphere snowmelt[J],2019,13(11).
APA	Todt M.,Rutter N.,G. Fletcher C.,&Wake L.M..(2019).Simulated single-layer forest canopies delay Northern Hemisphere snowmelt.The Cryosphere,13(11).
MLA	Todt M.,et al."Simulated single-layer forest canopies delay Northern Hemisphere snowmelt".The Cryosphere 13.11(2019).