Description and evaluation of the tropospheric aerosol scheme in the Integrated Forecasting System (IFS-AER, cycle 47R1) of ECMWF

• Published in: Geoscientific Model Development Vol. 15; no. 12; pp. 4881 - 4912
• Main Authors: Rémy, Samuel, Kipling, Zak, Huijnen, Vincent, Flemming, Johannes, Nabat, Pierre, Michou, Martine, Ades, Melanie, Engelen, Richard, Peuch, Vincent-Henri
• Format: Journal Article
• Language: English
• Published: Katlenburg-Lindau Copernicus GmbH 27.06.2022; European Geosciences Union; Copernicus Publications
• Subjects: Aerosol concentrations; Aerosol optical depth; Aerosols; Air pollution; Atmospheric monitoring; Atmospheric particulates; Budgets; Carbon; Chemistry; Comparative analysis; Data assimilation; Deposition; Dry deposition; Dust; Greenhouse gases; Humidity; Nitrates; Ocean, Atmosphere; Optical analysis; Optical thickness; Organic matter; Oxidation; Particulate emissions; Particulate matter; Remote sensing; Sciences of the Universe; Simulation; Sulfates; Suspended particulate matter; Weather forecasting; Wet and dry deposition; Wet deposition
• ISSN: 1991-9603; 1991-959X; 1991-962X; 1991-9603; 1991-962X; 1991-959X
• DOI: 10.5194/gmd-15-4881-2022

This article describes the Integrated Forecasting System aerosol scheme (IFS-AER) used operationally in the IFS cycle 47R1, which was operated by the European Centre for Medium Range Weather Forecasts (ECMWF) in the framework of the Copernicus Atmospheric Monitoring Services (CAMS). It represents an update of the Rémy et al. (2019) article, which described cycle 45R1 of IFS-AER in detail. Here, we detail only the parameterisations of sources and sinks that have been updated since cycle 45R1, as well as recent changes in the configuration used operationally within CAMS. Compared to cycle 45R1, a greater integration of aerosol and chemistry has been achieved. Primary aerosol sources have been updated, with the implementation of new dust and sea salt aerosol emission schemes. New dry and wet deposition parameterisations have also been implemented. Sulfate production rates are now provided by the global chemistry component of IFS. This paper aims to describe most of the updates that have been implemented since cycle 45R1, not just the ones that are used operationally in cycle 47R1; components that are not used operationally will be clearly flagged.