DOI: 10.1175/JCLI-D-17-0096.1
Scopus记录号: 2-s2.0-85028502076
论文题名: Global relationships between cropland intensification and summer temperature extremes over the last 50 years
作者: Mueller N.D. ; Rhines A. ; Butler E.E. ; Ray D.K. ; Siebert S. ; Holbrook N.M. ; Huybers P.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 18 起始页码: 7505
结束页码: 7528
语种: 英语
Scopus关键词: Agriculture
; Climate change
; Evapotranspiration
; Irrigation
; Land use
; Remote sensing
; Agricultural land use
; Agricultural practices
; Atmosphere-land interactions
; Extreme events
; Precipitation trends
; Temperature influence
; Trends
; Vapor pressure deficit
; Rain
英文摘要: Conversion of native ecosystems to cropland and the use of irrigation are considered dominant pathways through which agricultural land-use change alters regional climate. Recent research proposes that increases in cropland productivity, or intensification, also influences climate through increasing evapotranspiration. Increases in evapotranspiration are expected to have the greatest temperature influence on extremely hot summer days with high vapor pressure deficits. Here, the generalizability and importance of such relationships are assessed by examining historical land-use and climate trends in seven regions across the globe, each containing a major temperate or subtropical cropping area. Trends in summer high-temperature extremes are sequentially compared against trends in cropland area, area equipped for irrigation, precipitation, and summer cropping intensity. Trends in temperature extremes are estimated using quantile regression of weather station observations, and land-use data are from agricultural inventories and remote sensing. Intensification is the best predictor of trends in extreme temperatures among the factors that are considered and is generally associated with trends that are 0.2°- 0.4°C decade-1 cooler than in adjacent regions. Neither cropland area nor precipitation trends are systematically associated with extreme temperature trends across regions, although high temperatures are suppressed over those portions of central North America and East Asia experiencing growth in irrigation. Both the temperature trends associated with intensification and increased irrigation can be understood as a consequence of increased latent cooling. These results underscore that the weather experienced by crops is not entirely external but also depends on agricultural practices. © 2017 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48728
Appears in Collections: 气候减缓与适应 气候变化与战略
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作者单位: Department of Earth System Science, University of California, Irvine, Irvine, CA, United States; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Department of Forest Resources, 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 of Crop Science and Resource Conservation, University of Bonn, Bonn, Germany; Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA, United States; Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, United States
Recommended Citation:
Mueller N.D.,Rhines A.,Butler E.E.,et al. Global relationships between cropland intensification and summer temperature extremes over the last 50 years[J]. Journal of Climate,2017-01-01,30(18)