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°S to 60°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/m2 for black carbon, -0.52±0.24 W/m2 for organic carbon, -1.10±0.42 W/m2 for sulfate, -0.99±0.37 W/m2 for dust, -2.44±0.84 W/m2 for sea salt, and -4.98±1.67 W/m2 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/m2, 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. © 2007 Elsevier Ltd. All rights reserved.
CITATION STYLE
Zhao, T. X. P., Yu, H., Laszlo, I., Chin, M., & Conant, W. C. (2008). Derivation of component aerosol direct radiative forcing at the top of atmosphere for clear-sky oceans. Journal of Quantitative Spectroscopy and Radiative Transfer, 109(7), 1162–1186. https://doi.org/10.1016/j.jqsrt.2007.10.006
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