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. To improve the aeolian dust budget calculations with the global ECHAM/MESSyatmospheric chemistry–climate model (EMAC), which combines the Modular EarthSubmodel System (MESSy) with the ECMWF/Hamburg (ECHAM) climate model developedat the Max Planck Institute for Meteorology in Hamburg based on a weatherprediction model of the European Centre for Medium-Range Weather Forecasts (ECMWF), we haveimplemented new input data and updates of the emission scheme. The data set comprises land cover classification, vegetation, clay fraction andtopography.It is based on up-to-date observations, which are crucial to account for therapid changes of deserts and semi-arid regions in recent decades.The new Moderate Resolution Imaging Spectroradiometer (MODIS)-based land coverand vegetation data are time dependent, and the effect of long-term trends andvariability of the relevant parameters is therefore considered by the emissionscheme.All input data have a spatial resolution of at least 0.1∘ compared to 1∘ in the previous version, equipping the model for high-resolutionsimulations. We validate the updates by comparing the aerosol optical depth (AOD) at 550 nmwavelength from a 1-year simulation at T106 (about 1.1∘ ) resolutionwith Aerosol Robotic Network (AERONET) and MODIS observations, the10  µ m dust AOD (DAOD) with Infrared Atmospheric SoundingInterferometer (IASI) retrievals, and dust concentration and depositionresults with observations from the Aerosol Comparisons between Observations and Models (AeroCom) dust benchmark data set. Theupdate significantly improves agreement with the observations and is thereforerecommended to be used in future simulations.

Revised mineral dust emissions in the atmospheric chemistry–climate model EMAC (MESSy 2.52 DU_Astitha1 KKDU2017 patch)