| DOI: | 10.1175/JCLI-D-16-0589.1
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| Scopus记录号: | 2-s2.0-85014568647
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| 论文题名: | Impacts of land-use/land-cover change on afternoon precipitation over North America |
| 作者: | Chen L.; Dirmeyer P.A.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2017
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| 卷: | 30, 期:6 | | 起始页码: | 2121
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| 结束页码: | 2140
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| 语种: | 英语
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| Scopus关键词: | Climate models
; Deforestation
; Heat flux
; Land use
; Precipitation (meteorology)
; Rain
; Reforestation
; Soil moisture
; Surface measurement
; Atmosphere-land interactions
; CAPE
; Convective precipitation
; Land use/land cover change
; Land-atmosphere couplings
; Large-scale circulation
; North America
; Precipitation relationships
; Landforms
; atmosphere-biosphere interaction
; climate modeling
; deforestation
; land cover
; land use change
; precipitation assessment
; rainfall
; Atlantic Coast [North America]
; Atlantic Coast [United States]
; Great Plains
; United States
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| 英文摘要: | This study investigates the impacts of historical land-cover change on summer afternoon precipitation over North America using the Community Earth System Model. Using land-atmosphere coupling metrics, this study examines the sensitivity of afternoon atmospheric conditions to morning land surface states and fluxes that are altered by land-cover changes before and since 1850. The deforestation in the eastern United States prior to 1850 leads to increased latent but decreased sensible heat flux during the morning and a reduction in afternoon precipitation over the southern regions of the U.S. East Coast. The agricultural expansion over the Great Plains since preindustrial times shows similar effects on surface fluxes but results in a significant widespread increase in precipitation over the crop area. The coupling metrics exhibit a strong positive soil moisture-precipitation relationship over the Great Plains. Impacts of land-cover change on precipitation manifest through changes in rainfall frequency, rather than intensity, that are largely controlled by the distribution of CAPE as the trigger of convective precipitation. However, deforestation and later reforestation over the eastern United States, where coupling properties are different than the Great Plains, do not have as dominant an effect on afternoon precipitation. Additionally, precipitation over parts of the U.S. Southwest decreases in this model during the earlier period of East Coast deforestation, owing to changes in the large-scale circulation over North America driven by land-use changes prior to 1850. © 2017 American Meteorological Society. |
| 资助项目: | NSF, National Science Foundation
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/49751
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Center for Ocean-Land-Atmosphere Studies, George Mason University, Fairfax, VA, United States
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| Recommended Citation: | |
Chen L.,Dirmeyer P.A.. Impacts of land-use/land-cover change on afternoon precipitation over North America[J]. Journal of Climate,2017-01-01,30(6)
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