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Conference Paper

Implementation of sulfur hexafluoride (SF6) in the Belgian Assimilation System for Chemical ObsErvations

Authors

Vervalcke,  Sarah
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Errera,  Quentin
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Chabrillat,  Simon
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Vervalcke, S., Errera, Q., Chabrillat, S. (2023): Implementation of sulfur hexafluoride (SF6) in the Belgian Assimilation System for Chemical ObsErvations, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3055


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020581
Abstract
Sulfur hexafluoride (SF6) is a greenhouse gas that is emitted at the surface because of its use as an insulator in electric power systems. Due to its quasi-linear emission growth and its very long lifetime, SF6 can be used as a tracer for the Age of Air (AoA) to diagnose changes in the Brewer Dobson Circulation (BDC). The chemistry of SF6 has been implemented in the Chemistry Transport Model (CTM) of the Belgian Assimilation System for Chemical ObsErvations (BASCOE). Reaction rates were taken from previous studies while an electron density has been taken from EMAC simulations. In this contribution, BASCOE-CTM simulations driven by ERA5 and MERRA2 will be discussed considering SF6 with and without mesospheric sinks (i.e. passive SF6 in the latter case). During the course of the simulations, the computed mixing ratios have also been saved in the space of MIPAS observations to analyse the impact of the MIPAS sampling in its AoA derivation.