DOI: 10.1002/jgrd.50327
论文题名: Evaluation of black carbon semi-direct radiative effect in a climate model
作者: Li J. ; Von Salzen K. ; Peng Y. ; Zhang H. ; Liang X.-Z.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 10 起始页码: 4715
结束页码: 4728
语种: 英语
英文关键词: black carbon
; black carbon inclusion in cloud droplets
; semi-direct effect
Scopus关键词: Atmospheric aerosols
; Atmospheric radiation
; Computer simulation
; Drops
; Aerosol optical depths
; Black carbon
; Climate model simulations
; Cloud droplets
; Radiative effects
; Radiative forcings
; semi-direct effect
; Top of the atmospheres
; Climate models
; aerosol
; black carbon
; boundary layer
; climate modeling
; cloud
; droplet
; latitude
; optical depth
; optical property
; parameterization
; radiative forcing
; satellite data
英文摘要: The semi-direct effect of black carbon (BC) is studied by using a newly proposed optical property parameterization for cloud droplets with BC inclusions. Based on Atmospheric Model Intercomparison Project-type climate model simulations, it is found that the cloud amount can be either enhanced or reduced when BC is included in clouds. The decrease of the global annual mean total cloud amount is only about 0.023%. The 3-D cloud fraction distribution, however, shows larger changes which vary with latitude. A correlation between the changes of the cloud fraction and the vertical velocity is found. The cloud water path is mainly affected by low clouds and so the impact of BC on the cloud water path is particularly strong. It is shown that the BC above clouds tends to stabilize the atmosphere and enhance the cloud amount in the boundary layer. This can be used to explain the relationship between aerosol optical depth and cloud amount according to satellite data. For BC in clouds and above, the global annual mean enhancement of solar absorption is about 0.049 W m-2 and 0.57 W m-2, respectively. The BC semi-direct radiative forcing is estimated by subtracting the BC direct forcing from the BC total radiative forcing. The global annual mean of BC direct forcing and semi-direct forcing at the top of the atmosphere are 0.264 W m-2 and 0.213 W m-2, respectively. Key PointsBC inclusion in cloud dropletsrelationship between BC and cloudRe-investigate the BC semi-direct forcing ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63771
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Canadian Centre for Climate Modelling and Analysis, Science and Technology Branch, Environment Canada, Victoria BC V8W 2Y2, Canada; Laboratory for Climate Studies, National Climate Center, China Meteorological Administration, Beijing, China; Department of Atmospheric and Oceanic Science, University of Maryland, College Park MD, United States
Recommended Citation:
Li J.,Von Salzen K.,Peng Y.,et al. Evaluation of black carbon semi-direct radiative effect in a climate model[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(10)