Analysis of UKESM1-StratTrop CCMI2022 experiments with a focus on ozone trends
- 1National Centre for Atmospheric Science, University of Cambridge, Chemistry Department, Cambridge, United Kingdom of Great Britain – England, Scotland, Wales (ptg21@cam.ac.uk)
- 2Lancaster Environment Centre, Lancaster University, Lancaster, United Kingdom of Great Britain – England, Scotland, Wales
The transport of ozone from the stratosphere to the troposphere is a key contributor to the tropospheric ozone budget. It is estimated that the stratosphere-to-troposphere flux of ozone (STT) leads to ~500 Tg of ozone transported into the troposphere each year, which is comparable to the net chemical production of ozone within the troposphere.
We will present an analysis of the tropospheric ozone budget in the CCMI2022 experiments performed with UKESM-StratTrop, a whole atmosphere chemistry-climate model.
We focus on the specified dynamics experiments covering 1982-2018, during which there was significant ozone depletion. We intercompare the ozone budget from the derived using the complementary approaches of Ox and Oy species, and use idealised tracers to examine in detail the role of stratosphere-to-troposphere transport on tropospheric composition. Where possible, these model simulations are compared with in-situ calculation of ozone production and loss rates derived from observations.
How to cite: Griffiths, P., Keeble, J., and Abraham, L.: Analysis of UKESM1-StratTrop CCMI2022 experiments with a focus on ozone trends, EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024, EGU24-20001, https://doi.org/10.5194/egusphere-egu24-20001, 2024.
