Comparison of tropomi total ozone column with ground-based measurement in Río Gallegos, Argentina

Abstract

In this study, the TROPOspheric Monitoring Instrument (TROPOMI) Offline total ozone column (TOC) product is compared with ground-based observations made by SAOZ instruments for the period 2018–2024. TROPOMI instrument is on board the ESA Copernicus Sentinel-5 Precursor satellite launched in October 2017. It provides a daily global coverage at a spatial resolution as high as 7 km × 3.5 km (Lambert et al., 2019). The SAOZ instrument, which belongs to LATMOS/CNRS (Laboratoire Atmosphères, Milieux, Observations Spatiales/Centre National de la Recherche Scientifique), is installed in the Observatorio Atmosférico de la Patagonia Austral [Atmospheric Observatory of Southern Patagonia] (OAPA) (CITEDEF (UNIDEF–CONICET)) in Río Gallegos, Argentina (51.60°S, 69.30°W; 72 m a.s.l.) since 2008 (Orte et al., 2019). It performs zenith measurements of the spectral diffuse solar irradiance at sunrise and sunset (at SZA between 86° and 91°).