EGU2020-8918, updated on 09 Jan 2024
https://doi.org/10.5194/egusphere-egu2020-8918
EGU General Assembly 2020
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Impact of ECMWF ERA-Interim and ERA5 reanalysis on the simulated tracer transport and polar ozone loss using a chemical transport model TOMCAT/SLIMCAT

Wuhu Feng1,2, Martyn Chipperfield2, Sandip Dhmose2, Florence Goutail3, Michelle Santee4, Benni Birner5, Ralph Keeling5, and Gabriele Stiller6
Wuhu Feng et al.
  • 1University of Leeds, National Centre for Atmospheric Science, School of Earth and Environment, Leeds, United Kingdom of Great Britain and Northern Ireland (w.feng@leeds.ac.uk)
  • 2University of Leeds, School of Earth and Environment, Leeds, United Kingdom of Great Britain and Northern Ireland
  • 3LATMOS/CNRS/UVSQ , France
  • 4JPL, NASA,USA
  • 5Scripps Institution of Oceanography, UC San Diego, La Jolla, CA 92093, USA
  • 6Karlsruhe Institute of Technology IMK-ASF P.O. Box 3640 76021 Karlsruhe, Germany

Three-dimensional chemical transport models (CTMs) have been widely used in a wide variety of scientific studies (e.g., to obtain a better understanding of tracer transport and to study the dynamical and chemical processes which control polar ozone losses etc). However, there are still some uncertainties in the model simulations and indeed in our understanding. For example, the accuracy of ozone simulations largely depends on the transport, chemistry and treatment of PSCs in the model as well as the forcing files. 

Here we have used a  CTM model TOMCAT/SLIMCAT with a detailed description of stratospheric and tropospheric chemistry forced by differnt wind fields (ECMWF ERA-Interim and ERA5 reanalysis datasets) to investigate the different dynamical fields on the simulated tracer transport, ozone and other chemical species. Both simulations have been run from 1979 to 2018. First we will assess the impact of different reanalysis data on the idealised tracers when the model includes additional process of the gravitational separation of gases (e.g., Ar/N2) and compare the model results with dataset of gravitational fractionation of Ar/N2 and AoA observations made on flask samples from three airborne research projects. Modelled AoA will be also compared with MIPAS data.  Then we will focus on the polar ozone loss from late 1990 to 2018 and quntify
the amount of chemical ozone loss using both models and satellite observations as well as  SAOZ measurements. The year-to-year variation of polar ozone depletion will also be discussed, in particular for the recent years of decreasing stratospheric chlorine loading. 

How to cite: Feng, W., Chipperfield, M., Dhmose, S., Goutail, F., Santee, M., Birner, B., Keeling, R., and Stiller, G.: Impact of ECMWF ERA-Interim and ERA5 reanalysis on the simulated tracer transport and polar ozone loss using a chemical transport model TOMCAT/SLIMCAT, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-8918, https://doi.org/10.5194/egusphere-egu2020-8918, 2020.