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Biophysical effect of conversion from croplands to grasslands in water-limited temperate regions of China
Liu, Zhengjia1,2; Liu, Yansui1,2; Baig, Muhammad Hasan Ali3
2019-01-15
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume648Pages:315-324
Corresponding AuthorLiu, Zhengjia(liuzj@igsnrr.ac.cn) ; Liu, Yansui(liuys@igsnrr.ac.cn)
AbstractThe biophysical effect of land use and land cover change (LUCC) on regional climatic regulation is currently of growing interest. However, in water-limited temperate regions, the net biophysical effect of conversion from croplands to grasslands on regional climatic regulation remains poorly understood to date. To answer this concern, a modified land surface model (mEASS) and two different land use scenarios in a typical study area of the Loess Plateau of China were used in this study. We first validated the performances of mEASS model by using observations from six flux tower sites with different land cover and three metrics of the coefficient of determination (R-2), the root mean square error (RMSE) and the difference between the simulated and observed data (bias). Subsequently, the biophysical effect of conversion from croplands to grasslands was investigated. Results indicated that mEASS model could well capture the seasonal dynamics of net radiation and latent heat with high R-2 and lower RMSE and bias at grassland, forest and cropland sites. In the context of semi-arid and semihumid climatic conditions, conversion from croplands to grasslands caused the cooling effect (-0.3 W/m(2)) at the annual scale. Similar cooling effects were found in spring (-0.4 W/m(2)), autumn (-0.8 +/- 0.1 W/m(2)) and winter (-0.9 +/- 0.1 W/m(2)). The decreased latent heat (inducing warming effects) were completely offset by decreased net radiation (inducing cooling effects), which were responsible for the net cooling effects. However, a warming effect with 1.0 +/- 0.1 W/m(2) was observed in summer. This is because that magnitude of decreased latent heat is greater than that of decreased net radiation in summer. These findings will enrich our understanding for the biophysical effect of conversion from croplands to grasslands in water-limited temperate regions. (C) 2018 Elsevier B.V. All rights reserved.
KeywordLand use change Temperature regulation Net radiation Latent heat Water-limited temperate regions
DOI10.1016/j.scitotenv.2018.08.128
WOS KeywordLAND-COVER CHANGE ; CLIMATE-CHANGE ; SURFACE-TEMPERATURE ; CROP CLASSIFICATION ; ECOSYSTEM SERVICES ; LOESS PLATEAU ; MODEL ; DEFORESTATION ; LANDSCAPE ; CANOPY
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41601582] ; National Key Research and Development Program of China[2017YFC0504701] ; Start-up Research Program of IGSNRR
Funding OrganizationNational Natural Science Foundation of China ; National Key Research and Development Program of China ; Start-up Research Program of IGSNRR
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000447805500030
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/52669
Collection中国科学院地理科学与资源研究所
Corresponding AuthorLiu, Zhengjia; Liu, Yansui
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.PMAS Arid Agr Univ, IGEO, Rawalpindi, Pakistan
Recommended Citation
GB/T 7714
Liu, Zhengjia,Liu, Yansui,Baig, Muhammad Hasan Ali. Biophysical effect of conversion from croplands to grasslands in water-limited temperate regions of China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,648:315-324.
APA Liu, Zhengjia,Liu, Yansui,&Baig, Muhammad Hasan Ali.(2019).Biophysical effect of conversion from croplands to grasslands in water-limited temperate regions of China.SCIENCE OF THE TOTAL ENVIRONMENT,648,315-324.
MLA Liu, Zhengjia,et al."Biophysical effect of conversion from croplands to grasslands in water-limited temperate regions of China".SCIENCE OF THE TOTAL ENVIRONMENT 648(2019):315-324.
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