EVAPOTRANSPIRATION AND SOIL MOISTURE DYNAMICS IN A TEMPERATE GRASSLAND ECOSYSTEM IN INNER MONGOLIA, CHINA

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	EVAPOTRANSPIRATION AND SOIL MOISTURE DYNAMICS IN A TEMPERATE GRASSLAND ECOSYSTEM IN INNER MONGOLIA, CHINA
	Hao, L.; Sun, G.; Liu, Y. -Q.; Zhou, G. S.; Wan, J. H.; Zhang, L. B.; Niu, J. L.; Sang, Y. H.; He, J. J.
刊名	TRANSACTIONS OF THE ASABE
	2016
卷号	59 期号:2 页码:577-590
关键词	Climate change Evapotranspiration MIKE SHE model Soil moisture Water balance
ISSN号	2151-0032
文献子类	Article
英文摘要	Precipitation, evapotranspiration (ET), and soil moisture are the key controls for the productivity and functioning of temperate grassland ecosystems in Inner Mongolia, northern China. Quantifying the soil moisture dynamics and water balances in the grasslands is essential to sustainable grassland management under global climate change. We conducted a case study on the variability and characteristics of soil moisture dynamics from 1991 to 2012 by combining field monitoring and computer simulation using a physically based model, MIKE SHE, at the field scale. Our long-term monitoring data indicated that soil moisture dramatically decreased at 50, 70, and 100 cm depths while showing no obvious trend in two other layers (0-10 cm and 10-20 cm). The MIKE SHE model simulations matched well to measured daily ET during 2011-2012 (correlation coefficient R = 0.87; Nash-Sutcliffe NS = 0.73) and captured the seasonal dynamics of soil moisture at five soil layers (R = 0.36-0.75; NS = 0.06-0.42). The simulated long-term (1991-2012) mean annual ET was 272 mm, nearly equal to the mean precipitation of 274 mm, and the annual precipitation met ET demand for only half of the years during 1991 to 2012. Recent droughts and lack of heavy rainfall events in the past decade caused the decreasing trend of soil moisture in the deep soil layers (50-100 cm). Our results show that precipitation dominated the water balances in the grassland, and the balance between ET and precipitation explained the seasonal changes of soil water content in different soil layers. We conclude that the persistent drought and change in precipitation patterns of decreasing large storm events as well as total rainfall were the main causes for the observed drying trend in soils in the 2000s, although we could not exclude other impacts from regional hydrologic alterations, such as groundwater overdraft.
学科主题	Agricultural Engineering
电子版国际标准刊号	2151-0040
出版地	ST JOSEPH
WOS关键词	MIKE SHE MODEL ; SYSTEME HYDROLOGIQUE EUROPEEN ; TEMPORAL STABILITY ; CLIMATE-CHANGE ; LOESS PLATEAU ; WATER ; SURFACE ; LAND ; PRECIPITATION ; PATTERNS
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	AMER SOC AGRICULTURAL & BIOLOGICAL ENGINEERS
WOS记录号	WOS:000374755100019
资助机构	Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41571026, 71373130] ; Chinese Meteorological Administration Special Fund for Climate change [CCSF201511] ; Chinese Special Fund for Meteorological-Scientific Research in the Public Interest [GYHY201106025] ; Jiangsu Key Laboratory of Agricultural Meteorology Fund [KYQ1201] ; Southern Research Station, USDA Forest ServiceUnited States Department of Agriculture (USDA)United States Forest Service
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/24984]
专题	植被与环境变化国家重点实验室
作者单位	1.Sang, Y. H.] Nanjing Univ Informat Sci & Technol, Jiangsu Key Lab Agr Meteorol, IceMe, Nanjing, Jiangsu, Peoples R China 2.[He, J. J.] Xilinhot Natl Climatol Observ, Xilinhot, Inner Mongolia, Peoples R China 3.[Hao, L.] Nanjing Univ Informat Sci & Technol, Jiangsu Key Lab Agr Meteorol, Int Ctr Ecol Meteorol & Environm IceMe, Nanjing, Jiangsu, Peoples R China 4.[Sun, G.] USDA Forest Serv, Eastern Forest Environm Threat Assessment Ctr, Southern Res Stn, Raleigh, NC USA 5.[Liu, Y. -Q.] USDA Forest Serv, Ctr Forest Disturbance Sci, Southern Res Stn, Athens, GA USA 6.[Zhou, G. S.] Chinese Acad Sci, Inst Bot, Beijing, Peoples R China 7.[Wan, J. H.] China Inst Water Resources & Hydropower Res, Beijing, Peoples R China 8.[Zhang, L. B. 9.Niu, J. L.
推荐引用方式 GB/T 7714	Hao, L.,Sun, G.,Liu, Y. -Q.,et al. EVAPOTRANSPIRATION AND SOIL MOISTURE DYNAMICS IN A TEMPERATE GRASSLAND ECOSYSTEM IN INNER MONGOLIA, CHINA[J]. TRANSACTIONS OF THE ASABE,2016,59(2):577-590.
APA	Hao, L..,Sun, G..,Liu, Y. -Q..,Zhou, G. S..,Wan, J. H..,...&He, J. J..(2016).EVAPOTRANSPIRATION AND SOIL MOISTURE DYNAMICS IN A TEMPERATE GRASSLAND ECOSYSTEM IN INNER MONGOLIA, CHINA.TRANSACTIONS OF THE ASABE,59(2),577-590.
MLA	Hao, L.,et al."EVAPOTRANSPIRATION AND SOIL MOISTURE DYNAMICS IN A TEMPERATE GRASSLAND ECOSYSTEM IN INNER MONGOLIA, CHINA".TRANSACTIONS OF THE ASABE 59.2(2016):577-590.