Analysis of the variability of canopy resistance over a desert steppe site in Inner Mongolia, China

doi:10.1007/s00376-013-3071-6

	Analysis of the variability of canopy resistance over a desert steppe site in Inner Mongolia, China
	Zhang Guo 1; Zhou Guangsheng 3; Chen Fei 2; Wang Yu 4
	2014
发表期刊	ADVANCES IN ATMOSPHERIC SCIENCES
ISSN	0256-1530
卷号	31 期号:3 页码:681-692
摘要	Canopy resistance substantially affects the partitioning of available energy over vegetated surfaces. This study analyzed the variability of canopy resistance and associated driving environmental factors over a desert steppe site in Inner Mongolia, China, through the use of eddy-flux and meteorological data collected from 2008 to 2010. Distinct seasonal and interannual variabilities in canopy resistance were identified within those three years, and these variabilities were controlled primarily by precipitation. Strong interannual variability was found in vapor pressure deficit (VPD), similar to that of air temperature. Based on the principal component regression method, the analysis of the relative contribution of five major environmental factors [soil-water content (SWC), leaf-area index (LAI), photosynthetically active radiation (K (p)), VPD, and air temperature] to canopy resistance showed that the canopy-resistance variation was most responsive to SWC (with > 35% contribution), followed by LAI, especially for water-stressed soil conditions (> 20% influence), and VPD (consistently with an influence of approximately 20%). Canopy-resistance variations did not respond to K (p) due to the small interannual variability in K (p) during the three years. These analyses were used to develop a new exponential function of water stress for the widely used Jarvis scheme, which substantially improved the calculation of canopy resistance and latent heat fluxes, especially for moist and wet soils, and effectively reduced the high bias in evaporation estimated by the original Jarvis scheme. This study highlighted the important control of canopy resistance on plant evaporation and growth for the investigated desert steppe site with a relatively low LAI.
关键词	variability canopy resistance desert steppe site principal component regression
学科领域	Meteorology & Atmospheric Sciences
DOI	10.1007/s00376-013-3071-6
收录类别	SCI
语种	英语
WOS关键词	LAND-SURFACE PARAMETERIZATION ; FAIR-WEATHER CBL ; STOMATAL CONDUCTANCE ; EDDY-COVARIANCE ; ENERGY-BALANCE ; PART I ; TEMPERATE GRASSLAND ; FLUX MEASUREMENTS ; MODEL ; EVAPOTRANSPIRATION
WOS研究方向	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000334181000018
出版者	SCIENCE PRESS
文献子类	Article
出版地	BEIJING
EISSN	1861-9533
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
作者邮箱	gszhou@cams.cma.gov.cn
引用统计	被引频次：9[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/2S10CLM1/27267
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 100049, Peoples R China 3.Natl Ctr Atmospher Res, Boulder, CO 80302 USA 4.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 5.Henan Univ Sci & Technol, Coll Forestry, Luoyang 471003, Peoples R China
推荐引用方式 GB/T 7714	Zhang Guo,Zhou Guangsheng,Chen Fei,et al. Analysis of the variability of canopy resistance over a desert steppe site in Inner Mongolia, China[J]. ADVANCES IN ATMOSPHERIC SCIENCES,2014,31(3):681-692.
APA	Zhang Guo,Zhou Guangsheng,Chen Fei,&Wang Yu.(2014).Analysis of the variability of canopy resistance over a desert steppe site in Inner Mongolia, China.ADVANCES IN ATMOSPHERIC SCIENCES,31(3),681-692.
MLA	Zhang Guo,et al."Analysis of the variability of canopy resistance over a desert steppe site in Inner Mongolia, China".ADVANCES IN ATMOSPHERIC SCIENCES 31.3(2014):681-692.

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