DOI: 10.1007/s10584-016-1848-1
Scopus记录号: 2-s2.0-85011277759
论文题名: Potential impact of reforestation programmes and uncertainties in land cover effects over the loess plateau: a regional climate modeling study
作者: Wang L. ; Cheung K.K.W.
刊名: Climatic Change
ISSN: 0165-0009
EISSN: 1573-1480
出版年: 2017
卷: 144, 期: 3 起始页码: 475
结束页码: 490
语种: 英语
英文关键词: Biosphere atmosphere transfer scheme
; Community land model
; Loess plateau
; Reforestation
; Regional climate model
Scopus关键词: Biospherics
; Climate change
; Crops
; Heat flux
; Irrigation
; Landforms
; Reforestation
; Sediments
; Soil moisture
; Surface measurement
; Uncertainty analysis
; Water content
; Absorbed solar radiations
; Community land models
; Increased temperature
; Land atmosphere interaction
; Loess Plateau
; Regional climate modeling
; Surface air temperatures
; Transfer scheme
; Climate models
; air temperature
; climate modeling
; energy balance
; evapotranspiration
; land cover
; latent heat flux
; longwave radiation
; parameterization
; reforestation
; regional climate
; uncertainty analysis
; China
; Loess Plateau
英文摘要: Using the Regional Climate Model version 4.3 (RegCM4.3), this paper investigates the potential effects of reforestation on the regional climate over the Loess Plateau in China with a focus on land-atmosphere interactions. Two land surface schemes are used here: the default Biosphere Atmosphere Transfer Scheme (BATS) and the Community Land Model version 3.5 (CLM3.5). Five simulations using a series of hypothetical reforestation scenarios from 1990 to 2009 have been performed. Results show that in the default BATS simulations, the surface air temperature increases significantly during both summer (June–July-August) and winter (December–January-February) seasons. These patterns are particularly evident over the south-eastern plateau where extensive areas of irrigated crop are converted to forest. In experiments with CLM3.5 and BATS with non-irrigation, in which irrigated crops are specified as regular crops, reforestation generally produces a more pronounced cooling effect in summer, and a slight cooling winter in CLM3.5 but a slight warming in BATS with non-irrigation. The land surface energy balance equation involving latent heat flux (LHF), absorbed solar radiation and downward atmospheric longwave radiation is used to explain the reforestation-induced seasonal responses. In the default BATS simulations, increased temperature induced by reforestation is predominantly driven by the reduced year round LHF. In contrast, the reforestation-induced summer cooling in CLM3.5 and BATS with non-irrigation is caused by the enhanced LHF. This study suggests that the default parameterization of irrigated crop in BATS overestimates soil water content and leading to excessive evapotranspiration (ET) in the Loess Plateau. Hence, non-irrigated cropland would be a more plausible land cover representation for the Loess Plateau, as demonstrated from the reforestation simulations using CLM3.5 and BATS with non-irrigation. An improved description of land characteristics in climate models is highly needed for a more reliable prediction of climate responses to land surface change. © 2016, Springer Science+Business Media Dordrecht. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83898
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Department of Environmental Sciences, Macquarie University, North Ryde, NSW, Australia; Institute of Environment, Energy and Sustainability, The Chinese University of Hong Kong, China
Recommended Citation:
Wang L.,Cheung K.K.W.. Potential impact of reforestation programmes and uncertainties in land cover effects over the loess plateau: a regional climate modeling study[J]. Climatic Change,2017-01-01,144(3)