13.5 Retrievals of Ozone Profiles over Greenland and Their Relationship to Sudden Stratospheric Warmings

Friday, 13 July 2018: 9:30 AM
Regency E/F (Hyatt Regency Vancouver)
Shima Bahramvash-Shams, Washington State University, Pullman, WA; and V. Walden and M. Palm

Recent work has shown that the profile of ozone over Greenland is sensitive to the phase of the quasi-biennial oscillation (QBO). This is likely because of a significant dynamical teleconnection between the tropics and the Arctic that occurs over Greenland. We use nearly eight years of downwelling infrared radiance measurements from Summit Station, Greenland from the Integrated Characterization of Energy, Clouds, Atmospheric state, and Precipitation over Summit (ICECAPS) campaign to retrieve ozone profiles from July 2010 to spring 2018. The radiance spectra were measured from 3 to 20 micrometers by the polar Atmospheric Emitted Radiance Interferometer (P-AERI) at a moderate spectral resolution of 0.5 inverse centimeters. The SFIT4 spectral data analysis model is used to retrieve ozone profiles during periods of clear-sky conditions. Profiles from ozonesondes launched by NOAA at Summit are used for validation. The retrievals provide finer time resolution than the ozonesondes and, therefore, provide valuable insight into the short-term variations of ozone over Greenland that are associated with sudden stratospheric warming (SSW) events. SSW events in January 2013, March 2016, and February 2018 over Summit Station are examined.
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