In Situ and Satellite Instrument Comparisons of Stratospheric Ozone and Aerosol Data

Sharon Gill, University of Wyoming

Cryogenic Limb Array Etalon Spectrometer (CLAES) version 8 ozone measurements were compared to coincident in situ ozonesonde measurements over Laramie, WY (41ºN, 106ºW), McMurdo Station, Antarctica (78ºS, 167ºE), Dumont d'Urville, Antarctica (66.7ºS, 140ºE), and Bear Island, Norway (74.3ºN, 19ºE). Significant differences between the in situ ozone values and CLAES values over McMurdo Station prompted further investigations of the available data over this location. Specifically, comparisons of in situ column ozone with the Total Ozone Mapping Spectrometer (TOMS) and in situ ozone measurements with the Polar Ozone and Aerosol Measurement instrument (POAM II) over McMurdo were also studied.

In addition, CLAES version 8 aerosol absorption measurements are compared to coincident absorptions calculated from measured aerosol size distributions from an optical particle counter flown over Laramie, WY and McMurdo Station, Antarctica. The results over Laramie are analyzed within the framework of previous studies of aerosol comparisons, using data from the Halogen Occultation Experiment (HALOE), the Improved Stratospheric and Mesospheric Sounder (ISAMS), and the Stratospheric Aerosol and Gas Experiment II (SAGE II).