Total Ozone Columns from the Environmental Trace Gases Monitoring Instrument (EMI) Using the DOAS Method

Global measurements of total ozone are necessary to evaluate hole recovery above Antarctica. The Environmental Trace Gases Monitoring Instrument (EMI) onboard GaoFen 5, launched in May 2018, was developed measure and monitor the global column (TOC) distributions other trace gases. In this study, some first TOC results EMI using differential optical absorption spectroscopy (DOAS) method validation with ground-based data derived from Ozone (OMI) TROPOspheric (TROPOMI) observations presented. Results show that monthly average had a similar spatial distribution high correlation coefficient (R ≥ 0.99) both OMI TROPOMI TOC. Comparisons World Ultraviolet Radiation Data Centre also revealed strong correlations > 0.9). Continuous zenith sky scattered light instruments Antarctica were used for = EMI-derived able account rapid change associated sudden stratospheric warming event October 2019; 2019 45% higher compared 2018. These indicate DOAS is reliable has potential be monitoring.