DOI: 10.1175/JCLI-D-12-00454.1
Scopus记录号: 2-s2.0-84884962983
论文题名: Evolving land-atmosphere interactions over North America from CMIP5 simulations
作者: Dirmeyer P.A. ; Jin Y. ; Csingh C. ; Yan C.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 19 起始页码: 7313
结束页码: 7327
语种: 英语
Scopus关键词: Anthropogenic aerosols
; Atmosphere-land interactions
; Coupled Model Intercomparison Project
; Hydrologic cycles
; Land-atmosphere couplings
; Land-atmosphere interactions
; Seasonal climate prediction
; Subtropical regions
; Aerosols
; Boundary layers
; Climate models
; Soil moisture
; Surface measurement
; Climate change
; aerosol
; atmosphere-biosphere interaction
; boundary layer
; climate change
; climate modeling
; climate prediction
; hydrological cycle
; latent heat flux
; soil moisture
; surface energy
; warming
; Great Plains
英文摘要: Long-term changes in land-atmosphere interactions during spring and summer are examined over North America. A suite of models from phase 5 of the Coupled Model Intercomparison Project simulating preindustrial, historical, and severe future climate change scenarios are examined for changes in soil moisture, surface fluxes, atmospheric boundary layer characteristics, and metrics of land-atmosphere coupling. Simulations of changes from preindustrial to modern conditions show warming brings stronger surface fluxes at high latitudes, while subtropical regions of North America respond with drier conditions. There is a clear anthropogenic aerosol response in midlatitudes that reduces surface radiation and heat fluxes, leading to shallower boundary layers and lower cloud base. Over the Great Plains, the signal does not reflect a purely radiatively forced response, showing evidence that the expansion of agriculture may have offset the aerosol impacts on the surface energy and water cycle. Future changes show soils are projected to dry across North America, even though precipitation increases north of a line that retreats poleward from spring to summer. Latent heat flux also has a north-south dipole of change, increasing north and decreasing south of a line that also moves northward with the changing season. Metrics of land-atmosphere feedback increase over most of the continent but are strongest where latent heat flux increases in the same location and season where precipitation decreases. Combined with broadly elevated cloud bases and deeper boundary layers, land-atmosphere interactions are projected to become more important in the future with possible consequences for seasonal climate prediction. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51631
Appears in Collections: 气候变化事实与影响
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作者单位: George Mason University, Fairfax, VA, United States; Center for Ocean-Land-Atmosphere Studies, Calverton, MD, United States; George Mason University, Fairfax, VA, United States
Recommended Citation:
Dirmeyer P.A.,Jin Y.,Csingh C.,et al. Evolving land-atmosphere interactions over North America from CMIP5 simulations[J]. Journal of Climate,2013-01-01,26(19)