Top-down estimated NOx emissions in China derived by multi-source data assimilation

1. Inversion results of NOx emissions by different assimilation scheme This datasets contains the top-down estimated three-dimensional NOx emissions in China in January and July, 2019 derived by surface data assimilation, satellite data assimilation and three combined data assimilation schemes. Files: invnox_emis_201901.nc invnox_emis_201907.nc 2. Simulated surface NO2 concentrations in China This dataset contains simulated in situ surface NO₂ concentrations over China using the CMAQ model, based on a priori and constrained NOₓ emissions obtained through different data assimilation schemes. Files: simno2_201901.nc simno2_201907.nc 3. Simulated NO2 tropospheric vertical column density over East Asia This dataset contains simulated NO2 tropospheric vertical column density over east Asia for TROPOMI and OMI using the CMAQ model, based on a priori and constrained NOₓ emissions obtained through different data assimilation schemes. Files: simno2tropvcd_201901.nc simno2tropvcd_201907.nc simno2tropvcd_201901_omi.nc simno2tropvcd_201907_omi.nc