A216-0013
Ground-based validation of the merged satellite ozone profile record from SBUV/OMPS nadir instruments

Wednesday, 16 December 2020
Poster
Natalya A Kramarova1, Pawan K Bhartia2, Stacey M Frith3, Liang-Kang Huang4, Gordon J Labow2, Jerald R Ziemke3, Richard D McPeters3, David P Haffner1, Colin J Seftor3 and Matthew T DeLand5, (1)Science Systems and Applications, Inc., Lanham, MD, United States, (2)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (3)NASA Goddard SFC, Greenbelt, MD, United States, (4)SSAI, Lanham, MD, United States, (5)Sci Systems & Applications Inc, Lanham, MD, United States
Abstract:
The ground-based network of ozone sondes and Dobson/Brewer instruments provide valuable measurements for satellite validation. In this study we compared the new version of the SBUV Merged Ozone Dataset (MOD) with the ground-based ozone observations. The MOD combines measurements from multiple UV nadir sensors processed with the same retrieval algorithm. The ultimate goal of the new version was to improve cross-calibrations among SBUV sensors and therefore reduce uncertainties in the derived ozone trends. The SBUV algorithm uses climatological ozone profiles as a priori to constrain retrievals. In the new version 8.7, we updated the ozone climatology to explicitly account for the diurnal ozone effect. This is important because SBUV-2 instruments were launched on board of satellites with drifting orbits and the measurements were acquired at different local times. In the troposphere, a sonde-based ozone climatology was replaced with a climatology derived from GMI model simulations to account for variability that cannot be sampled by the relatively sparse sonde network.
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