Representativeness of the Arosa/Davos Measurements for the Analysis of the Global Total Column Ozone Behavior

Eugene Rozanov,Arseniy Karagodin-Doyennel,Timofei Sukhodolov,Julian Gröbner,Luca Egli,Tatiana Egorova,Herbert Schill,Rene Stübi

doi:10.3389/feart.2021.675084

Abstract

The study investigates the representativeness of the total column ozone (TCO) measurements from the ground-based instruments located at the Arosa/Davos stations in Switzerland to analyze the global ozone layer behavior in the past and future. The statistical analysis of the satellite and model data showed a high correlation of the ground-based TCO data with the near-global and northern hemisphere annual mean TCO for the 1980–2018 period. Addition of the Arosa/Davos TCO data as a proxy to the set of standard explanatory variables for multiple linear regression analysis allows estimating the TCO behavior from 1926 up to the present day. We demonstrate that the real-time measurements and high homogeneity level of the Arosa/Davos TCO time series are also beneficial for quick estimates of the future ozone layer recovery.

Highlights

The local point ground-based measurements of atmospheric quantities are important as a part of global networks (e.g., Fioletov et al, 2008) and can be used for the validation of satellite data (e.g., Loew et al, 2017) if they are representative of the time and space over the respective satellite footprint
total column ozone (TCO) measurements with the other necessary proxies to diagnose the future ozone layer recovery
The raw data supporting the conclusions of this article will be made available by the authors, without undue reservation

Summary

INTRODUCTION

The local point ground-based measurements of atmospheric quantities are important as a part of global networks (e.g., Fioletov et al, 2008) and can be used for the validation of satellite data (e.g., Loew et al, 2017) if they are representative of the time and space over the respective satellite footprint. Further analysis is necessary to establish how the local point measurements (like the Arosa/Davos TCO time series) can be applied for a fast diagnosis of the ozone recovery progress on a global scale This investigation will be based on the reanalysis of the already available model results (Egorova et al, 2021; Sukhodolov et al, 2021) to determine ozone evolution until the end of the 21st century. The northern hemisphere and near-global mean TCO evolution during 2000–2094 simulated with the model SOCOLv4 and reconstructed from the proxies are presented in Figures 10, 11 For this analysis, Arosa/Davos data for the future were extracted from the model simulations. In the real atmosphere, this event will not strictly coincide with the model, but anyway, the recovery will be reached after 2035

SUMMARY

DATA AVAILABILITY STATEMENT