Seasonal Variation of Simulated Carbonaceous Fine Particulate Matter overthe Indian Region by using WRF-Chem with two emission Inventories:EDGAR-HTAP and SAFAR-2018

Abstract

Seasonal Variation of Simulated Carbonaceous Fine Particulate Matter overthe Indian Region by using WRF-Chem with two emission Inventories:EDGAR-HTAP and SAFAR-2018Praveen Kumar1, Gufran Beig1,4, Vikas Singh2, B.S. Murthy1, B.R. Bamniya31Indian Institute of Tropical Meteorology, Pune- 4110082 National Atmospheric Research Laboratory, Gadanki, AP-5171123Mohan LalSukhadiya University, Udaipur, 3130014National Institutes of Advanced Studies (NIAS), Indian Institute of Science (IISc) Campus,BANGALORE-560012Abstract:This study better evaluates Black Carbon (BC) using Weather Research and Forecasting modelcoupled with chemistry (WRF-Chem) v3.9.1.1, with newly developed emission inventorySAFAR-2018 and global one EDGAR-HTAP for the year 2018. The simulation provides a viewof the seasonal and regional pattern BC concentrations, confirmed by comparing surfacemeteorological parameters and BC concentrations to the MERRA reanalysis for the Indianregion. It found that the model simulated surface C-PM concentration with SAFAR-2018emission inventory is slightly overestimated, but simulation with EDGAR emission inventory isunder-estimated than MERRA. It also found that the model-simulated meteorological parameters( e.g., wind speed at 2 m, the surface temperature at 2 m, and Planetary Boundary Layer heightshowed better agreement with observation. Compared to the simulation with EDGAR emissioninventory, simulated geographic patterns of seasonal mean BC with SAFAR-2018 emissioninventory exhibit good agreement with MERRA. In the IGP region, the concentration of BCshowed the highest peak during the winter, followed by the post-monsoon season compared toother subcontinents of India. The correlation coefficients of annual hourly time series of surfaceBC_sf (SAFAR-2018 emission) concentrations with MERRA over India were higher (0.92) withRMSE 0.45. These correlations were higher than those (EDGAR emission) observed for thesurface BC_ed (R = 0.91 & RMSE = 0.48) concentrations. It appears that model simulation withSAFAR-2018 emission inventory well-captured pattern and magnitude over the Indian region,increasing magnitude of BC concentrations may help to quantify better the effect on climate andatmospheric condition over the Indian region.