兰州大学机构库 >资源环境学院
Regional water-energy cycle response to land use/cover change in the agro-pastoral ecotone, Northwest China
Wang, Xuejin1; Zhang, BQ(张宝庆)1; Xu, Xuefeng1; Tian, Jie1; He, Chansheng1,2
2020
Source PublicationJournal of Hydrology
ISSN0022-1694
Volume580
AbstractA better understanding of responses of the regional water-energy cycle to land use/cover change (LUCC) is important for ecological restoration in the agro-pastoral ecotone, Northwest China (APENWC). In this study, we examined the responses to various types of LUCC in the APENWC during the implementation of the Grain-for-Green project between 1993 and 2010 using the weather research and forecasting (WRF) model. The performance of the WRF model was validated by multiple types of observations. Results show that the WRF can accurately simulate regional water and energy processes in the APENWC, and that the water-energy cycles in the region are strongly affected by vegetation dynamics. During the period of 1993 and 2010, the most obviously increased land cover types were the grassland and barren land, and the decreased land cover types were shrublands and croplands in the study region. A significantly negative correlation (R2 = 0.78) between land surface temperature (LST) and albedo was found, associated with a 0.5 °C reduction in the annual mean surface temperature in the APENWC between 1993 and 2010. Negative correlations between changes in evapotranspiration (ET) and albedo during the period in all seasons were also detected, except summer, when the correlation was positive (R2 = 0.49). This is attributed to transpiration from plants being the main contributor to ET in summer and, hence total ET. The changes resulted in an increase of ET by 19.79 mm in summer, and decreases of ET by 1.15 mm, 13.22 mm, and 0.96 mm, respectively, in spring, fall, and winter. The LUCC also resulted in reductions in precipitation (of 2.3, 7.31, and 7.8 mm in spring, summer, and fall, respectively) by altering local ET and vapor flux cycles in the APENWC, and the study region contributed additional moisture from the local ET into the north of the region. The findings show that the grassland expansion reduces mean land surface temperature, which will delay germination of seeds and initiation of vegetation growth in spring. Increases in seasonal ET and reductions in seasonal precipitation will lead to soil drying, exacerbating risks of summer drought in the APENWC. The findings provide important information in facilitating formulation of effective strategies for sustainable development and ecological restoration in the APENWC and similar regions.
© 2019 Elsevier B.V.
KeywordLand use/cover change Land surface temperature Evapotranspiration Precipitation Land-atmosphere interaction
DOI10.1016/j.jhydrol.2019.124246
Indexed BySCIE ; EI
Language英语
Funding ProjectWestern Michigan University[] ; National Natural Science Foundation of China[41877150] ; []
WOS Research AreaEngineering ; Geology ; Water Resources
WOS SubjectEngineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS IDWOS:000509620900025
PublisherElsevier B.V.
EI Accession Number20194407599850
EI KeywordsAtmospheric temperature ; Ecology ; Evapotranspiration ; Land use ; Planning ; Precipitation (chemical) ; Restoration ; Seed ; Solar radiation ; Surface measurement ; Surface properties ; Vegetation ; Weather forecasting
EI Classification NumberUrban and Regional Planning and Development:403 ; Meteorology:443 ; Atmospheric Properties:443.1 ; Ecology and Ecosystems:454.3 ; Solar Energy and Phenomena:657.1 ; Chemical Operations:802.3 ; Agricultural Products:821.4 ; Management:912.2 ; Mechanical Variables Measurements:943.2 ; Materials Science:951
Original Document TypeJournal article (JA)
Citation statistics
Cited Times:0[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lzu.edu.cn/handle/262010/418504
Collection资源环境学院
Corresponding AuthorZhang, Baoqing
Affiliation1.Key Laboratory of West China's Environmental System (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou; Gansu; 730000, China
2.Department of Geography, Western Michigan University, Kalamazoo; MI; 49008, United States
First Author AffilicationLanzhou University
Corresponding Author AffilicationLanzhou University
Recommended Citation
GB/T 7714
Wang, Xuejin,Zhang, Baoqing,Xu, Xuefeng,et al. Regional water-energy cycle response to land use/cover change in the agro-pastoral ecotone, Northwest China[J]. Journal of Hydrology,2020,580.
APA Wang, Xuejin,Zhang, Baoqing,Xu, Xuefeng,Tian, Jie,&He, Chansheng.(2020).Regional water-energy cycle response to land use/cover change in the agro-pastoral ecotone, Northwest China.Journal of Hydrology,580.
MLA Wang, Xuejin,et al."Regional water-energy cycle response to land use/cover change in the agro-pastoral ecotone, Northwest China".Journal of Hydrology 580(2020).
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