Effects of local and remote black carbon aerosols on summer monsoon precipitation over India

Abstract In this study, we perform idealized climate model simulations to assess the relative impacts of an increase in local black carbon (BC) aerosols (located over Indian region) and remote BC outside on summer monsoon precipitation India. We decompose changes into fast adjustments triggered by introduction forcing agent slow response that is associated with global mean temperature change. find a 60-fold ‘present-day’ distribution leads India, which mainly contributed aerosols. When are increased, contribute association warming northern hemisphere land related northward Intertropical Convergence Zone (ITCZ) shift. For too, enhancing upper tropospheric meridional gradient region, The contributions both cases regional patterns SST change resulting region zonal circulation changes. net India (decrease) for (local) As interpretation our results relies ITCZ shift planetary energetics, differing land-ocean gradients from study likely be robust across models.