Modelling the abundance of 18O18O in the atmosphere and its sensitivity to temperature and ozone photochemistry.

Gromov, Sergey , Röckmann, Thomas , Laskar, Amzad H. and Peethambaran, Rahul (2019) Modelling the abundance of 18O18O in the atmosphere and its sensitivity to temperature and ozone photochemistry. Open Access [Talk] In: EGU General Assembly 2019. , 07.-12.04.2019, Vienna, Austria . DOI 10.5281/zenodo.3545956.

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Supplementary data:

Abstract

Atmospheric temperature and ozone photochemistry are recognised to play dominant roles in setting the abundance of 18O18O isotopologues (expressed via Δ36) of atmospheric oxygen. Here, we use the AC-GCM EMAC to simulate the abundance of atmospheric 18O18O in a most consistent to date kinetic chemistry modelling framework.

Extensive model diagnostics allow us quantifying contribution of various factors into changes in Δ36 since the last 60 years. It is shown that atmospheric dynamics is another fundamental ingredient of atmospheric Δ36 distribution.

We discuss potential applications of clumped O2 composition for quantifying various atmospheric processes like decadal changes in tropospheric O3 abundance or tropopause warming due to volcanism.

Document Type: Conference or Workshop Item (Talk)
Additional Information: Cite as: Gromov, Sergey, Röckmann, Thomas, Laskar, Amzad H., & Peethambaran, Rahul. (2019, April). Modelling the abundance of 18O18O in the atmosphere and its sensitivity to temperature and O3 photochemistry. Presented at the European Geosciences Union General Assembly 2019 (EGU 2019), Vienna, Austria: Zenodo. http://doi.org/10.5281/zenodo.3545956
Keywords: isotope; clumped; oxygen; Delta-36; O2; ozone; O3 O(3P); temperature; atmosphere; modelling; climate; transport; volcanism; AC-GCM; MESSy; EMAC
Related URLs:
Projects: PalMod in-kind
International?: Yes
Date Deposited: 04 May 2021 12:36
Last Modified: 04 May 2021 12:36
URI: https://oceanrep.geomar.de/id/eprint/52533

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