globalchange  > 影响、适应和脆弱性
DOI: 10.1002/jgrd.502272013
论文题名:
A study of the shortwave direct aerosol forcing using ESSP/CALIPSO observation and GCM simulation
作者: Oikawa E.; Nakajima T.; Inoue T.; Winker D.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期:9
起始页码: 3687
结束页码: 3708
语种: 英语
Scopus关键词: Atmospheric radiation ; Solar radiation ; Aerosol forcing ; Direct aerosol radiative forcing ; Low-level clouds ; Radiative transfer calculations ; Single scattering albedo ; Smoke aerosols ; Solar surfaces ; Top of the atmospheres ; Aerosols ; aerosol ; albedo ; CALIPSO ; data set ; general circulation model ; MODIS ; numerical model ; observational method ; satellite sensor ; shortwave radiation ; Africa
英文摘要: Shortwave direct aerosol radiative forcing (DARF) is derived at the top of the atmosphere (TOA) and at the surface under clear-sky, cloudy-sky, and all-sky conditions using data of space-borne CALIOP lidar and MODIS sensor. We investigate four scenarios for evaluating the DARF: clear-sky, the case that aerosols exist above clouds, the case that aerosols exist below high-level clouds, and the case that aerosols are not detected by CALIOP in cloudy-sky condition. The cloudy-sky DARF is estimated by the latter three scenarios. The all-sky DARF is the combination of clear-sky and cloudy-sky DARF weighted by the cloud occurrence. They are then compared with DARF calculated by a global aerosol model, SPRINTARS. The results show that the TOA forcing over desert regions caused by dust with single scattering albedo (SSA) of 0.92 is positive regardless of cloud existence, due to high solar surface albedo. Off southern Africa, smoke aerosols with SSA of 0.84 above low-level clouds are observed and simulated and the annual mean TOA cloudy-sky DARF is estimated at more than +3 Wm2, consistent with past studies. Aerosols with SSA of 0.96 within optically thin clouds cause a TOA negative forcing, while that within optically thick clouds cause a TOA positive forcing. This indicates that aerosols within optically thick clouds cause positive forcing in our radiative transfer calculation, regardless of SSA. Annual zonal averages of DARF from 60S to 60N under clear-sky, cloudy-sky, and all-sky are 2.97, +0.07, and 0.61 Wm2 from CALIOP and 2.78, +1.07, and 0.58 Wm2 from SPRINTARS. © 2013. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63427
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: Atmosphere and Ocean Research Institute, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8568, Japan; NASA Langley Research Center, Hampton, NH, United States

Recommended Citation:
Oikawa E.,Nakajima T.,Inoue T.,et al. A study of the shortwave direct aerosol forcing using ESSP/CALIPSO observation and GCM simulation[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(9)
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