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The simulation of direct radiative effect of black carbon (BC) aerosol over Asia is carried out with application of Regional Climate Model RegCM3 over the period of 1993–2003 based on BC emission inventory in 2000. Major findings are as follows. The column burden of BC exceeds 1 mg/m² in central, eastern, and southern China with the highest value of 2.5 mg/m² over Sichuan Basin of China, and is of 1–2 mg/m² in India subcontinent. The column averaged advection field of BC shows an eastward tendency in north of 20° N, whereas an opposite trend is found in south of 10° N. Off-line radiative forcing (RF) induced by BC, which is due to direct absorption or scattering of BC, is positive at the top of the atmosphere (TOA), while maximum effect is found over Sichuan Basin. The RF is of 1–1.5 W/m² in areas such as the middle and low reaches of the Yangtze River, East China Sea, South China Sea …