کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5430484 | 1397406 | 2008 | 25 صفحه PDF | دانلود رایگان |
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, â0.52±0.24 W/m2 for organic carbon, â1.10±0.42 W/m2 for sulfate, â0.99±0.37 W/m2 for dust, â2.44±0.84 W/m2 for sea salt, and â4.98±1.67 W/m2 for total aerosols. The total ADRF has also been partitioned into anthropogenic and natural components with a value of â1.25±0.43 and â3.73±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.
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 109, Issue 7, May 2008, Pages 1162-1186