DSCOVR EPIC Level 4 Tropospheric Ozone High Resolution Version 01

The stratospheric columns were derived from the Modern-Era Retrospective analysis for Research and Applications, Version 2 (MERRA-2) ozone fields (Gelaro et al., 2017). In contrast to the EPIC total ozone maps that are reported at high spatial resolution of 18 × 18 km2 near the center of the image, the TCO maps are spatially averaged over several EPIC pixels and reported on a regular spatial grid (0.25° latitude × 0.25° longitude).

Kramarova et al. (2021) provides a detailed description of the EPIC TCO product and its evaluation against independent ozonesondes and satellite measurements. Table 1 in Kramarova et al. (2021) lists all of the variables included in the TCO product files. Ozone arrays in the product files are integrated vertical columns in Dobson Units (DU; 1 DU = 2.687×10^20 molecules/m^2).