Towards an improved representation of carbonaceous aerosols over the Indian monsoon region in a regional climate model: RegCM

Abstract. Mitigation of carbonaceous aerosol emissions is expected to provide climate and health co-benefits. The accurate representation aerosols in models critical for reducing uncertainties their feedback. In this regard, emission fluxes life cycle processes are the two primary sources uncertainties. Here, we demonstrate that incorporation a dynamic ageing scheme estimates updated local improves over Indian monsoon region regional model, RegCM, compared with its default configuration. respective mean black carbon (BC) organic (OC) surface concentrations 2010 estimated be 4.25 10.35 µg m−3 Indo-Gangetic Plain (IGP) augmented model. BC column burden polluted IGP found 2.47 mg m−2, 69.95 % higher than model configuration much closer available observations. anthropogenic optical depth (AOD) increases by more 19 due enhancement, also leading better agreement observed AOD. top-of-the-atmosphere, surface, atmospheric short-wave radiative forcing at −0.3, −9.3, 9.0 W m−2 −0.89, −5.33, 4.44 Peninsular India (PI). Our results suggest combined effect modifications leads maximum improvements performance regions where play dominant role.