DOI: 10.1175/JCLI-D-12-00369.1
Scopus记录号: 2-s2.0-84892473208
论文题名: Drought and deforestation: Has land cover change influenced recent precipitation extremes in the Amazon?
作者: Bagley J.E. ; Desai A.R. ; Harding K.J. ; Snyder P.K. ; Foley J.A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 1 起始页码: 345
结束页码: 361
语种: 英语
Scopus关键词: Drought conditions
; Hydrologic cycles
; Inherent variability
; Interannual variability
; Land surface modeling
; Precipitation extremes
; South America
; Vegetation-atmosphere interactions
; Computer simulation
; Deforestation
; Drought
; algorithm
; annual variation
; deforestation
; drought
; evaporation
; hydrological cycle
; land cover
; precipitation assessment
; water vapor
; weather forecasting
; Amazon Basin
英文摘要: Expansion of agricultural lands and inherent variability of climate can influence the water cycle in the Amazon basin, impacting numerous ecosystem services. However, these two influences do not work independently of each other. With two once-in-a-century-level droughts occurring in the Amazon in the past decade, it is vital to understand the feedbacks that contribute to altering the water cycle. The biogeophysical impacts of land cover change within the Amazon basin were examined under drought and pluvial conditions to investigate how land cover and drought jointly may have enhanced or diminished recent precipitation extremes by altering patterns and intensity. Using theWeather Research and Forecasting (WRF) Model coupled to the Noah land surface model, a series of April-September simulations representing drought, normal, and pluvial years were completed to assess how land cover change impacts precipitation and how these impacts change under varied rainfall regimes. Evaporative sources of water vapor that precipitate across the region were developed with a quasi-isentropic back-trajectory algorithm to delineate the extent and variability that terrestrial evaporation contributes to regional precipitation.Adecrease in dry season latent heat flux and other impacts of deforestation on surface conditions were increased by drought conditions. Coupled with increases in dry season moisture recycling over the Amazon basin by ;7% during drought years, land cover change is capable of reducing precipitation and increasing the amplitude of droughts in the region. © 2014 American Meteorological Society. 资助项目: NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51323
Appears in Collections: 气候变化事实与影响
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作者单位: Center for Sustainability and the Global Environment, Department of Atmospheric and Oceanic Sciences, University of Wisconsin-Madison, Madison, WI, United States; Department of Atmospheric and Oceanic Sciences, University of Wisconsin-Madison, Madison, WI, United States; Department of Soil, Water and Climate, University of Minnesota, Twin Cities, St. Paul, MN, United States; Institute on the Environment, University of Minnesota, Twin Cities, St. Paul, MN, United States; Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, United States
Recommended Citation:
Bagley J.E.,Desai A.R.,Harding K.J.,et al. Drought and deforestation: Has land cover change influenced recent precipitation extremes in the Amazon?[J]. Journal of Climate,2014-01-01,27(1)