TY - GEN
AU - Angela Benedetti
AU - J.-J. Morcrette
AU - O. Boucher
AU - A. Dethof
AU - Richard Engelen
AU - Mike Fisher
AU - H. Flentjes
AU - N. Huneeus
AU - Luke Jones
AU - J. Kaiser
AU - S. Kinne
AU - A. Mangold
AU - Miha Razinger
AU - Adrian Simmons
AU - Martin Suttie
AU - the team
AB - This study presents the new aerosol assimilation system developed at the European Centre for Medium-Range Weather Forecasts for the Global and regional Earth-system Monitoring using Satellite and in-situ data (GEMS) project. The aerosol modelling and analysis system is fully integrated in the operational four-dimensional assimilation apparatus. Its purpose is to produce aerosol forecasts and reanalysis of aerosol fields using optical depth data from satellite sensors. This paper is the second of a series which describes the GEMS aerosol effort and focuses on the theoretical architecture and practical implementation of the aerosol assimilation system. It also provides a discussion of the background errors and observations errors for the aerosol fields, and presents a subset of results from the two-year reanalysis which has been run for 2003 and 2004 using data from the Moderate Resolution Imaging Spectroradiometer on the Aqua and Terra satellites. Independent datasets are used to show that, despite some compromises that have been made for feasibility reasons in regards to the choice of control variable and error characteristics, the analysis is very skilful in drawing to the observations and in improving the forecasts of aerosol optical depth.
BT - ECMWF Technical Memoranda
DA - 08/2008
DO - 10.21957/g3bogeske
LA - eng
M1 - 571
N2 - This study presents the new aerosol assimilation system developed at the European Centre for Medium-Range Weather Forecasts for the Global and regional Earth-system Monitoring using Satellite and in-situ data (GEMS) project. The aerosol modelling and analysis system is fully integrated in the operational four-dimensional assimilation apparatus. Its purpose is to produce aerosol forecasts and reanalysis of aerosol fields using optical depth data from satellite sensors. This paper is the second of a series which describes the GEMS aerosol effort and focuses on the theoretical architecture and practical implementation of the aerosol assimilation system. It also provides a discussion of the background errors and observations errors for the aerosol fields, and presents a subset of results from the two-year reanalysis which has been run for 2003 and 2004 using data from the Moderate Resolution Imaging Spectroradiometer on the Aqua and Terra satellites. Independent datasets are used to show that, despite some compromises that have been made for feasibility reasons in regards to the choice of control variable and error characteristics, the analysis is very skilful in drawing to the observations and in improving the forecasts of aerosol optical depth.
PB - ECMWF
PY - 2008
EP - 23
T2 - ECMWF Technical Memoranda
TI - Aerosol analysis and forecast in the ECMWF Integrated Forecast System: Data assimilation.
UR - https://www.ecmwf.int/node/8065
ER -