Evapotranspiration and water yield over China's landmass from 2000 to 2010

doi:10.5194/hess-17-4957-2013

NWIPB OpenIR

	Evapotranspiration and water yield over China's landmass from 2000 to 2010
	Liu, Y.1,2; Zhou, Y.1,3; Ju, W.1,2; Chen, J.1,2; Wang, S.4; He, H.4; Wang, H.4; Guan, D.5; Zhao, F.4; Li, Y.6; Hao, Y.7; Zhou, Y (reprint author), Nanjing Univ, Jiangsu Prov Key Lab Geog Informat Sci & Technol, Nanjing 210023, Jiangsu, Peoples R China.
	2013
发表期刊	HYDROLOGY AND EARTH SYSTEM SCIENCES
ISSN	1027-5606
卷号	17 期号:12 页码:4957-4980
文章类型	Article
摘要	Terrestrial carbon and water cycles are interactively linked at various spatial and temporal scales. Evapotranspiration (ET) plays a key role in the terrestrial water cycle, altering carbon sequestration of terrestrial ecosystems. The study of ET and its response to climate and vegetation changes is critical in China because water availability is a limiting factor for the functioning of terrestrial ecosystems in vast arid and semiarid regions. To constrain uncertainties in ET estimation, the process-based Boreal Ecosystem Productivity Simulator (BEPS) model was employed in conjunction with a newly developed leaf area index (LAI) data set, MODIS land cover, meteorological, and soil data to simulate daily ET and water yield at a spatial resolution of 500 m over China for the period from 2000 to 2010. The spatial and temporal variations of ET and water yield were analyzed. The influences of climatic factors (temperature and precipitation) and vegetation (land cover types and LAI) on these variations were assessed. Validations against ET measured at five ChinaFLUX sites showed that the BEPS model was able to simulate daily and annual ET well at site scales. Simulated annual ET exhibited a distinguishable southeast to northwest decreasing gradient, corresponding to climate conditions and vegetation types. It increased with the increase of LAI in 74% of China's landmass and was positively correlated with temperature in most areas of southwest, south, east, and central China. The correlation between annual ET and precipitation was positive in the arid and semiarid areas of northwest and north China, but negative in the Tibetan Plateau and humid southeast China. The national annual ET varied from 345.5 mm in 2001 to 387.8 mm in 2005, with an average of 369.8 mm during the study period. The overall rate of increase, 1.7 mm yr(-1) (R-2 = 0.18, p = 0.19), was mainly driven by the increase of total ET in forests. During 2006-2009, precipitation and LAI decreased widely and consequently caused a detectable decrease in national total ET. Annual ET increased over 62.2% of China's landmass, especially in the cropland areas of the southern Haihe River basin, most of the Huaihe River basin, and the southeastern Yangtze River basin. It decreased in parts of northeast, north, northwest, south China, especially in eastern Qinghai-Tibetan Plateau, the south of Yunnan Province, and Hainan Province. Reduction in precipitation and increase in ET caused vast regions in China, especially the regions south of Yangtze River, to experience significant decreases in water yield, while some sporadically distributed areas experienced increases in water yield. This study shows that the terrestrial water cycles in China's terrestrial ecosystems appear to have been intensified by recent climatic variability and human induced vegetation changes.; Terrestrial carbon and water cycles are interactively linked at various spatial and temporal scales. Evapotranspiration (ET) plays a key role in the terrestrial water cycle, altering carbon sequestration of terrestrial ecosystems. The study of ET and its response to climate and vegetation changes is critical in China because water availability is a limiting factor for the functioning of terrestrial ecosystems in vast arid and semiarid regions. To constrain uncertainties in ET estimation, the process-based Boreal Ecosystem Productivity Simulator (BEPS) model was employed in conjunction with a newly developed leaf area index (LAI) data set, MODIS land cover, meteorological, and soil data to simulate daily ET and water yield at a spatial resolution of 500 m over China for the period from 2000 to 2010. The spatial and temporal variations of ET and water yield were analyzed. The influences of climatic factors (temperature and precipitation) and vegetation (land cover types and LAI) on these variations were assessed.
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.5194/hess-17-4957-2013
关键词[WOS]	NET PRIMARY PRODUCTIVITY ; GROSS PRIMARY PRODUCTION ; REMOTE-SENSING INPUTS ; CARBON-CYCLE RESEARCH ; EAST-ASIA ; TERRESTRIAL ECOSYSTEMS ; BOREAL ECOSYSTEM ; SOIL-MOISTURE ; PROCESS MODEL ; NORTH CHINA
收录类别	SCI
语种	英语
项目资助者	National Basic Research Program of China(2010CB833503 ; Chinese Academy of Sciences(XDA05050602-1) ; Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) ; 2010CB950702)
WOS研究方向	Geology ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000329061400017
引用统计	被引频次：40[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/3968
专题	中国科学院西北高原生物研究所
通讯作者	Zhou, Y (reprint author), Nanjing Univ, Jiangsu Prov Key Lab Geog Informat Sci & Technol, Nanjing 210023, Jiangsu, Peoples R China.
作者单位	1.Nanjing Univ, Jiangsu Prov Key Lab Geog Informat Sci & Technol, Nanjing 210023, Jiangsu, Peoples R China 2.Nanjing Univ, Int Inst Earth Syst Sci, Nanjing 210023, Jiangsu, Peoples R China 3.Nanjing Univ, Sch Geog & Oceanog Sci, Nanjing 210023, Jiangsu, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 5.Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China 6.Chinese Acad Sci, Northwest Inst Plateau Biol, Xining 810008, Peoples R China 7.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Y.,Zhou, Y.,Ju, W.,et al. Evapotranspiration and water yield over China's landmass from 2000 to 2010[J]. HYDROLOGY AND EARTH SYSTEM SCIENCES,2013,17(12):4957-4980.
APA	Liu, Y..,Zhou, Y..,Ju, W..,Chen, J..,Wang, S..,...&Zhou, Y .(2013).Evapotranspiration and water yield over China's landmass from 2000 to 2010.HYDROLOGY AND EARTH SYSTEM SCIENCES,17(12),4957-4980.
MLA	Liu, Y.,et al."Evapotranspiration and water yield over China's landmass from 2000 to 2010".HYDROLOGY AND EARTH SYSTEM SCIENCES 17.12(2013):4957-4980.

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