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SAGE III/ISS Validation of Ozone and Water Vapor V5.2 Data Using Collocated Balloon-borne Measurements

S. Kizer1,2, M. Roell2, D. Flittner2, R. Damadeo2, C. Roller1,2, D. Hurst3,4, E. Hall3,4, A. Jordan3,4, P. Cullis3,4, B. Johnson4 and R. Querel5

1Science Systems and Applications, Inc. (SSAI), Lanham, MD 20706; 757-846-4221, E-mail: susan.h.kizer@nasa.gov
2NASA Langley Research Center, Hampton, VA 23681
3Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, Boulder, CO 80309
4NOAA Global Monitoring Laboratory (GML), Boulder, CO 80305
5National Institute of Water and Atmospheric Research (NIWA), Wellington, New Zealand

The Stratospheric Aerosol and Gas Experiment III (SAGE III) instrument installed on the International Space Station (ISS) has completed nearly four years of data collection and production of science data products. The SAGE III/ISS is a solar and lunar occultation instrument that scans the light from the Sun and Moon through the limb of the Earth’s atmosphere to produce vertical profiles of aerosol, ozone, water vapor, and other trace gases. It continues the legacy of previous SAGE instruments dating back to the 1970s to provide data continuity of stratospheric constituents critical for assessing trends in the ozone layer. This presentation shows the validation results of comparing SAGE III/ISS ozone and water vapor vertical profiles from the newly released v5.2 science product with those of balloon launched ozonesonde and frost point hygrometer measurements and satellite data from the Microwave Limb Sounder.

Figure 1

Figure 1. This figure shows global frost point hygrometer events matched spatially and temporally to SAGE and MLS data for the dates between June 2017 – May 2020. The left set of plots shows the comparison with SAGE v5.1 data. The right set of plots shows the comparison with SAGE v5.2 data. This presentation will provide more detail into the description of the SAGE algorithm updates as well as the details of creating the statistics in the evaluations.