A Trial to Improve Surface Heat Exchange Simulation through Sensitivity Experiments over a Desert Steppe Site

doi:10.1175/JHM-D-13-0113.1

	A Trial to Improve Surface Heat Exchange Simulation through Sensitivity Experiments over a Desert Steppe Site
	Zhang, Guo 1; Zhou, Guangsheng 2; Chen, Fei 3; Barlage, Michael 3; Xue, Lulin 3
	2014
发表期刊	JOURNAL OF HYDROMETEOROLOGY
ISSN	1525-755X
卷号	15 期号:2 页码:664-684
摘要	It is still a daunting challenge for land surface models (LSMs) to correctly represent surface heat exchange for water-limited desert steppe ecosystems. This study aims to improve the ability of the Noah LSM to simulate surface heat fluxes through addressing uncertainties in precipitation forcing conditions, rapidly evolving vegetation properties, soil hydraulic properties (SHPs), and key parameterization schemes. Three years (2008-10) of observed surface heat fluxes and soil temperature over a desert steppe site in Inner Mongolia, China, are used to verify model simulations. The proper seasonal distribution of precipitation, along with more realistic vegetation parameters, can improve the simulation of sensible heat flux (SH) and the seasonal variability of latent heat flux. Correctly representing the low-surface exchange coefficient is crucial for improving SH for short vegetation like this desert steppe site. Relating C-zil, the coefficient in the Noah surface exchange coefficient calculation, with canopy height h improves the simulated SH and the diurnal range of soil temperature over the simulation compared with using the default constant C-zil. The exponential water stress formulation proposed here for the Jarvis scheme improves the partitioning between soil evaporation and transpiration. It is found that the surface energy fluxes are very sensitive to SHPs. This study highlights the important role of the proper parameter values and appropriate parameterizations for the surface exchange coefficient and water stress function in canopy resistance in capturing the observed surface energy fluxes and soil temperature variations for this desert steppe site.
关键词	Land surface model
学科领域	Meteorology & Atmospheric Sciences
DOI	10.1175/JHM-D-13-0113.1
收录类别	SCI
语种	英语
WOS关键词	GREEN VEGETATION FRACTION ; NET PRIMARY PRODUCTIVITY ; DATA ASSIMILATION SYSTEM ; LAND-COVER DATA ; SOIL-MOISTURE ; EDDY-COVARIANCE ; INNER-MONGOLIA ; ETA-MODEL ; FLUX PARAMETERIZATION ; SPATIAL VARIATIONS
WOS研究方向	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000334179500009
出版者	AMER METEOROLOGICAL SOC
文献子类	Article
出版地	BOSTON
EISSN	1525-7541
资助机构	State Key Development Program of Basic Research [2010CB951303] ; Strategic Priority Research Program-Climate Change: Carbon Budget and Related Issues of the Chinese Academy of Sciences [XDA05050408] ; NCAR Water Cycle Across Scale ; BEACHON programs
作者邮箱	gszhou@cams.cma.gov.cn
作品OA属性	hybrid
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/27265
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Meteorol Sci, Beijing 100081, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 4.Natl Ctr Atmospher Res, Boulder, CO 80307 USA
推荐引用方式 GB/T 7714	Zhang, Guo,Zhou, Guangsheng,Chen, Fei,et al. A Trial to Improve Surface Heat Exchange Simulation through Sensitivity Experiments over a Desert Steppe Site[J]. JOURNAL OF HYDROMETEOROLOGY,2014,15(2):664-684.
APA	Zhang, Guo,Zhou, Guangsheng,Chen, Fei,Barlage, Michael,&Xue, Lulin.(2014).A Trial to Improve Surface Heat Exchange Simulation through Sensitivity Experiments over a Desert Steppe Site.JOURNAL OF HYDROMETEOROLOGY,15(2),664-684.
MLA	Zhang, Guo,et al."A Trial to Improve Surface Heat Exchange Simulation through Sensitivity Experiments over a Desert Steppe Site".JOURNAL OF HYDROMETEOROLOGY 15.2(2014):664-684.

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