Black carbon emissions from China based on atmospheric observations and a chemistry transport model

We estimated black carbon (BC) emissions from China using ground-based observations in remote regions of Japan and a chemical transport model. Tagged tracer simulations were performed with the GEOS-Chem chemical transport model. We selected data during which the influence of wet deposition during transport was minimal. We estimated the annual BC emissions from China by multiplying the emissions from the input bottom-up inventory by the observation-to-model ratios for mean BC concentrations after the selection.