Operational forecasts of stratospheric chemistry and aerosols by the ECMWF Integrated Forecasting System for the Copernicus Atmosphere Monitoring Service (CAMS) ...

• Main Authors: Chabrillat, Simon, Bingen, Christine, Errera, Quentin, Huijnen, Vincent, Metzger, Swen, Minganti, Daniele, Remy, Samuel, William, Jason, Flemming, Johannes
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Antarctic; Arctic; The Antarctic; Antarc*
• Online Access: https://dx.doi.org/10.57757/iugg23-3964; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019869

<!--!introduction!--> The ECMWF’s Integrated Forecast System (IFS) is the global atmospheric model used by the Copernicus Atmosphere Monitoring Service (CAMS) to provide analyses and forecasts on atmospheric composition. While the IFS configuration used operationally until June 2023 comprised a chemistry scheme and an aerosol module designed only for tropospheric composition, it has now been upgraded (cycle 48R1) to solve also for stratospheric chemistry and sulfate aerosols. We describe these two modules and their latest developments, evaluating hindcasts of stratospheric composition across eight winter-spring seasons above the polar regions and different aerosol case studies including quiescent and volcanic periods. The new stratospheric chemistry module, IFS(BASCOE), is evaluated against the BASCOE Reanalysis of Aura-MLS (BRAM) demonstrating its capacity to forecast the chemical composition of the polar lower stratosphere above both the Arctic and the Antarctic for five years with very different ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...