Derivation of component aerosol direct radiative forcing at the top of atmosphere for clear-sky oceans

被引:18
|
作者
Zhao, Tom X. -P. [1 ,2 ]
Yu, Hongbin [3 ,4 ]
Laszlo, Istvan [1 ]
Chin, Mian [3 ]
Conant, William C. [5 ]
机构
[1] NOAA, NESDIS, STAR, E RA1,RM7121,WWBG,Ctr Satellite Applicat & Res, Camp Springs, MD 20746 USA
[2] UMCP, Coorporate Inst Climate Study, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA
[3] NASA, Goddard Space Flight Ctr, Atmospheres Lab, Greenbelt, MD 20771 USA
[4] UMBC, Goddard Earth Sci & Technol Ctr, Baltimore, MD 21250 USA
[5] Univ Arizona, Dept Atmospher Sci, Tucson, AZ 85721 USA
基金
美国国家航空航天局;
关键词
aerosol direct radiative forcing; aerosol optical thickness;
D O I
10.1016/j.jqsrt.2007.10.006
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A two-step approach is proposed to derive component aerosol direct radiative forcing (ADRF) at the top of atmosphere (TOA) over global oceans from 60 degrees S to 60 degrees N for clear-sky condition by combining Terra CERES/MODIS-SSF shortwave (SW) flux and aerosol optical thickness (AOT) observations with the fractions of component AOTs from the GSFC/GOCART model. The derived global annual mean component ADRF is +0.08 +/- 0.17 W/m(2) for black carbon, -0.52 +/- 0.24 W/m(2) for organic carbon, -1.10 +/- 0.42 W/m(2) for sulfate, -0.99 +/- 0.37 W/m(2) for dust, -2.44 +/- 0.84 W/m(2) for sea salt, and -4.98 +/- 1.67 W/m(2) for total aerosols. The total ADRF has also been partitioned into anthropogenic and natural components with a value of -1.25 +/- 0.43 and -3.73 +/- 1.27 W/m(2), respectively. The major sources of error in the estimates have also been discussed. The analysis adds an alternative technique to narrow the large difference between current model-based and observation-based global estimates of component ADRF by combining the satellite measurement with the model simulation. (c) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1162 / 1186
页数:25
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