DOI: 10.1175/JCLI-D-15-0174.1
Scopus记录号: 2-s2.0-84957824411
论文题名: Understanding the rapid precipitation response to CO2 and aerosol forcing on a regional scale
作者: Richardson T.B. ; Forster P.M. ; Andrews T. ; Parker D.J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 2 起始页码: 583
结束页码: 594
语种: 英语
Scopus关键词: Aerosols
; Atmospheric radiation
; Atmospheric temperature
; Budget control
; Climate change
; Climatology
; Digital storage
; Meteorology
; Oceanography
; Surface measurement
; Surface properties
; Surface waters
; Troposphere
; Anthropogenic aerosols
; Atmospheric circulation
; Energy budget/balance
; Hydrologic cycles
; Land surface temperature
; Overturning circulation
; Radiative forcings
; Sea surface temperature (SST)
; Carbon dioxide
; aerosol
; atmospheric circulation
; carbon dioxide
; climate change
; energy budget
; hydrological cycle
; land surface
; precipitation (climatology)
; radiative forcing
; regional pattern
; sea surface temperature
英文摘要: Precipitation exhibits a significant rapid adjustment in response to forcing, which is important for understanding long-termclimate change. In this study, fixed sea surface temperature (SST) simulations are used to analyze the spatial pattern of the rapid precipitation response. Three different forcing scenarios are investigated using data obtained from phase 5 of CMIP (CMIP5): An abrupt quadrupling of CO2, an abrupt increase in sulfate, and an abrupt increase in all anthropogenic aerosol levels from preindustrial to present day. Analysis of the local energy budget is used to understand the mechanisms that drive the observed changes. It is found that the spatial pattern of the rapid precipitation response to forcing is primarily driven by rapid land surface temperature change, rather than the change in tropospheric diabatic cooling. As a result, the pattern of response due to increased CO2 opposes that due to sulfate and all anthropogenic aerosols, because of the opposing surface forcing.The rapid regional precipitation response to increased CO2 is robust among models, implying that the uncertainty in long-term changes is mainly associated with the response to SST-mediated feedbacks. Increased CO2 causes rapidwarming of the land surface,which destabilizes the troposphere, enhancing convection and precipitation over land in the tropics. Precipitation is reduced over most tropical oceans because of a weakening of overturning circulation and a general shift of convection to over land. Over most land regions in the midlatitudes, circulation changes are small. Reduced tropospheric cooling therefore leads to drying over many midlatitude land regions. © 2016 American Meteorological Society. 资助项目: DOE, U.S. Department of Energy
; EPSRC, U.S. Department of Energy
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50118
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: School of Earth and Environment, University of Leeds, Leeds, United Kingdom; Met Office Hadley Centre, Exeter, United Kingdom
Recommended Citation:
Richardson T.B.,Forster P.M.,Andrews T.,et al. Understanding the rapid precipitation response to CO2 and aerosol forcing on a regional scale[J]. Journal of Climate,2016-01-01,29(2)