National Atmospheric Emissions Inventory (NAEI) emissions data for Ammonia (NH3), Carbon Monoxide (CO), Nitrogen Oxides (NOx), Non methane VOCs (VOC), particulate matter <2.5 um (pm25), and particulate matter <10 um (pmco) for the UK. Inventory year is 2016. Original data available from: https://naei.beis.gov.uk/data/mapping This data is in netcdf format, and has been formatted for use with the EMEP air quality model (v4.33 onwards, downloadable from https://github.com/metno/emep-ctm ). The dataset consists of the (1km x 1km) gridded NAEI area sources, for each of the 11 emission sectors (agric, domcom, energyprod, indcom, indproc, nature, offshore, othertrans, roadtrans, solvents, and waste). NAEI point sources have been added to these emissions, allocated to the grid cell in which these sources occur. It is recommended that the user consults the processing scripts for details of this apportionment. The datasets also contain total area source emissions (totarea), and total area plus point source emissions (total), for illustration of the point source contributions. The python scripts used to create this datafiles are available in the 'NAEI_EMEP_Python_Script' directory of this repository: https://zenodo.org/record/3996688#.X0OYQkl7nUJ © Crown 2020 copyright Defra & BEIS via naei.beis.gov.uk, licenced under the Open Government Licence (OGL).