TY - GEN AU - J.-J. Morcrette AU - Angela Benedetti AU - Luke Jones AU - J. Kaiser AU - Miha Razinger AU - Martin Suttie AB - Prognostic aerosols were experimentally introduced in the ECMWF Integrated Forecasting System as part of the GEMS project in 2005. Their representation was refined as part of the MACC project, starting in 2009. Differences between the two systems are first discussed and results of comparisons of aerosol optical depth with satellite and AERONET ground station observations are discussed. BT - ECMWF Technical Memoranda DA - 12/2011 DO - 10.21957/juba2ukx1 LA - eng M1 - 659 N2 - Prognostic aerosols were experimentally introduced in the ECMWF Integrated Forecasting System as part of the GEMS project in 2005. Their representation was refined as part of the MACC project, starting in 2009. Differences between the two systems are first discussed and results of comparisons of aerosol optical depth with satellite and AERONET ground station observations are discussed. PB - ECMWF PY - 2011 EP - 32 T2 - ECMWF Technical Memoranda TI - Prognostic aerosols in the ECMWF IFS : MACC vs GEMS aerosols UR - https://www.ecmwf.int/node/11277 ER -