Comparison of OMI-DOAS total ozone column with ground-based measurements in Argentina

F. ORTE; E. LUCCINI; E. WOLFRAM; F. NOLLAS; J. PALLOTTA; R. D'ELIA; G. CARBAJAL; N. MBATHA; N. HLONGWANE

Revista de Teledeteccion

Spanish Association of Remote Sensing

Lugar: Valencia; Año: 2020

1133-0953

Total ozone column (TOC) measurements through the Ozone Monitoring Instrument (OMI/NASA EOS-Aura) are compared with ground-based observations made using Dobson and SAOZ instruments for the period 2004 ? 2019 and 2008 ? 02/2020, respectively. The OMI data were inverted using the Differential Optical Absorption Spectroscopy algorithm (overpass OMI-DOAS). The four ground-based sites used for the analysis are located in subpolar and subtropical latitudes spanning from 34ºS to 54ºS in the Southern Hemisphere, in the Argentine cities of Buenos Aires (34.58ºS, 58.36ºW; 25 m. asl.), Comodoro Rivadavia (45.86ºS, 67.50ºW; 46 m. asl.), Río Gallegos (51.60ºS, 69.30ºW; 72 m. asl.) and Ushuaia (54.80ºS, 68.30ºW; 14 m. asl.).The linear regression analyzes showed correlation values greater than 0.90 for all sites. The OMI measurements revealed an overestimation of less than 4 % with respect to the Dobson instruments, while the comparison with the SAOZ instrument presented a very low underestimation of less than 1 %.