GLOBEMISSION FIRE EMISSION PRODUCTS * Introduction This document discusses the wildfire emission data made available within the GlobEmission project at http://silam.fmi.fi/globemission/fires/datapage.php. A separate dataset is available for the anthropogenic primary aerosol emissions at http://www.globemission.eu/data.php. The fire emissions are derived from the MODIS Fire Radiative Power (FRP) observations as outlined in Sofiev et al. (2009). The species included are fine particles (PM2.5), carbon monoxide, sulphur dioxide (SO2), nitrogen oxides (given as NO2 equivalent) and ammonia (NH3). The chemical speciation is obtained from the relations given by Anreae and Merlet (2001). * The file format and contents The data are given in NetCDF3 format for years 2001-2010. The values are in kg / (gridcell * second) for each species. The grid is regular lon-lat with 0.5 degree resolution. The gridcells where no fires were detected for the given day are set to the fill value (-9999.0). The files include additional information about vertical distribution of the emissions in form of quantiles with respect to the emitted mass. For example, 80% of the emitted mass is emitted below the height (meters above ground) given variable prc_80_height in each gridcell. In the current release, the injection heights are based on the climatology of Sofiev et al. (2013). * Notes on the emission fields While the emissions from year 2002 onwards are based on the MODIS instruments on board both Aqua and Terra satellites, only data from the Terra satellite is available for 2001. Consequently, considerably fewer fires are detected for 2001 than the later years. * Contacts Julius Vira, Joana Soares Finnish Meteorological Institute first_name dot lastname at fmi dot fi * References Andreae, M.O., Merlet, P., 2001. Emission of trace gases and aerosols from biomass burning. Global Biogeochem. Cycles 15, 955-966. Sofiev, M., Vankevich, R., Lotjonen, M., Prank, M., Petukhov, V., Ermakova, T., Koskinen, J., Kukkonen, J., 2009. An operational system for the assimilation of the satellite information on wild-land fires for the needs of air quality modelling and forecasting. Atmos. Chem. Phys. 9, 6833-6847. Sofiev, M., Vankevich, R., Ermakova, T., Hakkarainen, J., 2013. Global mapping of maximum emission heights and resulting vertical profiles of wildfire emissions. Atmos. Chem. Phys. 13, 7039-7052.