New method for satellite observation interpretation using standard ground-based measurements of total ozone column
Yu.M. Timofeyev1, G.M. Nerobelov1,2, G.V. Kobzar1, A.A. Solomatnikova3
1Saint-Petersburg State University, St. Petersburg, Russia
2St. Petersburg Federal Research Center of the Russian Academy of Sciences, St. Petersburg, Russia
3The Voeikov Main Geophysical Observatory, St. Petersburg, Russia
Keywords: total ozone columns, inverse problem, multilinear regression method, IKFS-2, Dobson spectrophotometer
Abstract
We propose and analyze a new method for total ozone columns (TOC) retrieving by interpreting satellite-measurements of outgoing thermal radiation of the Earth (spectrometer IKFS-2, Russian satellite "Meteor-M" N 2). The new method is based on an inverse operator which is constructed using ground-based standard observations of TOC (Dobson and Brewer spectrophotometers) and satellite measurements together with multilinear regression. The method is analyzed using standard ground-based TOC measured by Dobson at Voeikovo station, Leningrad region (Voeikov Main Geophysical Observatory). The analysis shows that multilinear regression between TOC from ground-based measurements and spectra of outgoing Earth radiation by satellite observations approximates TOC in Voeikovo for 2015-2020 with an error of 2.8% and a correlation coefficient (CC) of 0.97. TOC time series retrieved from the inverse problem by the regression method has an error of 3.1% and a CC of 0.97. The method suggested can be implemented in different Earth regions with satellite observations and TOC retrieved from ozone measurements at World Meteorological Organization (WMO) stations.
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