Wintertime NOx emission inversion estimates over China constrained by surface and satellite observations using multiple chemical transport models

This dataset provides gridded NOx emission estimates over China used for evaluating the impact of model uncertainty on emission inversion. The data include the a priori NOx emission inventory and posterior NOx emission estimates inferred by three regional chemical transport models, CMAQ, WRF-Chem, and EPICC-Model. For each model, two posterior inventories are provided: one constrained by surface NO2 observations and the other constrained by satellite tropospheric NO2 column observations. The emission unit is micrograms per square meter per second. Variables included in the NetCDF file are: base: a priori NOx emission inventory sf_cmaq: posterior NOx emissions constrained by surface observations using CMAQ sf_epicc: posterior NOx emissions constrained by surface observations using EPICC-Model sf_wrfc: posterior NOx emissions constrained by surface observations using WRF-Chem sa_cmaq: posterior NOx emissions constrained by satellite observations using CMAQ sa_epicc: posterior NOx emissions constrained by satellite observations using EPICC-Model sa_wrfc: posterior NOx emissions constrained by satellite observations using WRF-Chem