气候变化领域集成服务门户(CCPortal): Numerical simulation of sensitivities of snow melting to spectral composition of the incoming solar radiation

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DOI	10.1007/s00376-009-0403-7
	Numerical simulation of sensitivities of snow melting to spectral composition of the incoming solar radiation
	Li Weiping; Sun Shufen; Wang Biao; Liu Xin
通讯作者	Li, WP (通讯作者)
发表日期	2009
ISSN	0256-1530
EISSN	1861-9533
起始页码	403
结束页码	412
卷号	26 期号:3
英文摘要	Snow albedo is an important factor influencing the snow surface energy budget and snow melting, yet uncertainties remain in the calculation of spectrally resolved snow surface albedo because the spectral composition (visible versus near infrared) of the incident solar radiation is seldom available. The influence of the spectral composition of the incoming solar radiation on the snow surface albedo, snow surface energy budget, and final snow ablation is investigated through sensitivity experiments of four snow seasons at two open sites in the Alps by using a multi-layer Snow-Atmosphere-Soil-Transfer scheme (SAST). Since the snow albedo in the near infrared (NIR) spectral band is significantly lower than that in the visible (VIS) band, and almost the entire NIR part of the solar radiation is absorbed in the top layer of the snow pack, given a fixed amount of incoming solar radiation, a lower VIS/NIR ratio implies that more NIR radiation is reaching the ground surface and more is absorbed by the top layer of the snow pack, therefore, speeding up the snow melting and increasing the surface runoff, although a lesser part of the solar radiation in the visible band is transmitted into and trapped by the sub-layer of the snow pack. The above VIS/NIR ratio effect of the incoming solar radiation can result in a couple of days difference in the timing of snow ablation and it becomes more significant in late spring when the total solar radiation is intensified with seasonal evolution. Snow aging also slightly intensifies this VIS/NIR ratio effect.
关键词	INTERFACE PROCESSES MODEL SURFACE CLIMATE ALBEDO SCHEME COVER VALIDATION PARAMETERS FOREST
英文关键词	simulation; snow albedo; snow melt; spectral composition; solar radiation
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000265914800004
来源期刊	ADVANCES IN ATMOSPHERIC SCIENCES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257664
推荐引用方式 GB/T 7714	Li Weiping,Sun Shufen,Wang Biao,et al. Numerical simulation of sensitivities of snow melting to spectral composition of the incoming solar radiation[J]. 中国科学院青藏高原研究所,2009,26(3).
APA	Li Weiping,Sun Shufen,Wang Biao,&Liu Xin.(2009).Numerical simulation of sensitivities of snow melting to spectral composition of the incoming solar radiation.ADVANCES IN ATMOSPHERIC SCIENCES,26(3).
MLA	Li Weiping,et al."Numerical simulation of sensitivities of snow melting to spectral composition of the incoming solar radiation".ADVANCES IN ATMOSPHERIC SCIENCES 26.3(2009).