气候变化领域集成服务门户(CCPortal): Some practical notes on the land surface modeling in the Tibetan Plateau

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DOI	10.5194/hess-13-687-2009
	Some practical notes on the land surface modeling in the Tibetan Plateau
	Yang, K.; Chen, Y. -Y.; Qin, J.
通讯作者	Yang, K (通讯作者)
发表日期	2009
ISSN	1027-5606
EISSN	1607-7938
起始页码	687
结束页码	701
卷号	13 期号:5
英文摘要	The Tibetan Plateau is a key region of land-atmosphere interactions, as it provides an elevated heat source to the middle-troposphere. The Plateau surfaces are typically characterized by alpine meadows and grasslands in the central and eastern part while by alpine deserts in the western part. This study evaluates performance of three state-of-the-art land surface models (LSMs) for the Plateau typical land surfaces. The LSMs of interest are SiB2 (the Simple Biosphere), CoLM (Common Land Model), and Noah. They are run at typical alpine meadow sites in the central Plateau and typical alpine desert sites in the western Plateau. The identified key processes and modeling issues are as follows. First, soil stratification is a typical phenomenon beneath the alpine meadows, with dense roots and soil organic matters within the topsoil, and it controls the profile of soil moisture in the central and eastern Plateau; all models, when using default parameters, significantly under-estimate the soil moisture within the topsoil. Second, a soil surface resistance controls the surface evaporation from the alpine deserts but it has not been reasonably modeled in LSMs; an advanced scheme for soil water flow is implemented in a LSM, based on which the soil resistance is determined from soil water content and meteorological conditions. Third, an excess resistance controls sensible heat fluxes from dry bare-soil or sparsely vegetated surfaces, and all LSMs significantly under-predict the ground-air temperature gradient, which would result in higher net radiation, lower soil heat fluxes and thus higher sensible heat fluxes in the models. A parameterization scheme for this resistance has been shown to be effective to remove these biases.
关键词	ENERGY BUDGET SOIL EVAPORATION PARAMETERIZATION WATER HEAT RESISTANCE SCHEMES SYSTEM FLUXES
语种	英语
WOS研究方向	Geology ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000266556600012
来源期刊	HYDROLOGY AND EARTH SYSTEM 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/257619
推荐引用方式 GB/T 7714	Yang, K.,Chen, Y. -Y.,Qin, J.. Some practical notes on the land surface modeling in the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2009,13(5).
APA	Yang, K.,Chen, Y. -Y.,&Qin, J..(2009).Some practical notes on the land surface modeling in the Tibetan Plateau.HYDROLOGY AND EARTH SYSTEM SCIENCES,13(5).
MLA	Yang, K.,et al."Some practical notes on the land surface modeling in the Tibetan Plateau".HYDROLOGY AND EARTH SYSTEM SCIENCES 13.5(2009).