DOI: 10.1175/JCLI-D-16-0603.1
Scopus记录号: 2-s2.0-85015935568
论文题名: The role of plant CO2 physiological forcing in shaping future daily-scale precipitation
作者: Skinner C.B. ; Poulsen C.J. ; Chadwick R. ; Diffenbaugh N.S. ; Fiorella R.P.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 7 起始页码: 2319
结束页码: 2340
语种: 英语
Scopus关键词: Atmospheric boundary layer
; Atmospheric radiation
; Boundary layers
; Carbon
; Carbon dioxide
; Climate change
; Climate models
; Electric power system interconnection
; Evapotranspiration
; Forestry
; Moisture
; Physiology
; Precipitation (chemical)
; Precipitation (meteorology)
; Scale (deposits)
; Transpiration
; Vegetation
; Atmosphere-land interactions
; Atmospheric conditions
; Community climate system model
; Daily precipitations
; Precipitation change
; Precipitation characteristics
; Stomatal conductance
; Surface latent heat fluxes
; Physiological models
; atmospheric moisture
; carbon dioxide
; carbon emission
; climate modeling
; evapotranspiration
; hydrological change
; latent heat flux
; precipitation (climatology)
; radiative forcing
; vegetation
英文摘要: Continued anthropogenic CO2 emissions are expected to drive widespread changes in precipitation characteristics. Nonetheless, projections of precipitation change vary considerably at the regional scale between climate models. Here, it is shown that the response of plant physiology to elevated CO2, or CO2 physiological forcing drives widespread hydrologic changes distinct from those associated with CO2 radiative forcing and has a role in shaping regional-scale differences in projected daily-scale precipitation changes. In a suite of simulations with the Community Climate System Model, version 4 (CCSM4), reduced stomatal conductance from projected physiological forcing drives large decreases in transpiration and changes the distribution of daily-scale precipitation within and adjacent to regions of dense vegetation and climatologically high transpiration. When atmospheric conditions are marginally favorable for precipitation, reduced transpiration dries the boundary layer and increases the likelihood of dry day occurrence. In CCSM4, the annual number of dry days increases by upward of 15 days yr-1 over tropical land and the continental midlatitudes. Decreases in transpiration from physiological forcing also increase the number of heavy precipitation events by up to 8 days yr-1 in many tropical forest regions. Despite reductions in the land surface contribution to atmospheric moisture, diminished surface latent heat fluxes warm the forest boundary layer and increase moisture convergence from nearby oceans, enhancing instability. The results suggest that consideration of the radiative impacts of CO2 alone cannot account for projected regional-scale differences in daily precipitation changes, and that CO2 physiological forcing may contribute to differences in projected precipitation characteristics among climate models. © 2017 American Meteorological Society. 资助项目: DOE, U.S. Department of Energy
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49885
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI, United States; Met Office Hadley Centre, Exeter, United Kingdom; Department of Earth System Science, Stanford University, Stanford, CA, United States; Woods Institute for the Environment, Stanford University, Stanford, CA, United States; Department of Geology and Geophysics, University of Utah, Salt Lake City, UT, United States
Recommended Citation:
Skinner C.B.,Poulsen C.J.,Chadwick R.,et al. The role of plant CO2 physiological forcing in shaping future daily-scale precipitation[J]. Journal of Climate,2017-01-01,30(7)