Retrieval of Ozone Column Content from Airborne Sun Photometer Measurements during SOLVE II: Comparison with SAGE III, POAM III, TOMS and GOME Measurements

HR: 0830h
AN: A41C-0705 [PDF]
TI: Retrieval of Ozone Column Content from Airborne Sun Photometer Measurements during SOLVE II: Comparison with SAGE III, POAM III, TOMS and GOME Measurements
AU: * Livingston, J
EM: jlivingston@mail.arc.nasa.gov
AF: SRI International, 333 Ravenswood Ave., Menlo Park, CA 94025 United States
AU: Schmid, B
AF: Bay Area Environmental Research Institute, 560 Third St. West, Sonoma, CA 95476 United States
AU: Russell, P
AF: NASA Ames Research Center, MS 245-5, Moffett Field, CA 94035 United States
AU: Eilers, J
AF: NASA Ames Research Center, MS 245-5, Moffett Field, CA 94035 United States
AU: Kolyer, R
AF: NASA Ames Research Center, MS 245-5, Moffett Field, CA 94035 United States
AU: Redemann, J
AF: Bay Area Environmental Research Institute, 560 Third St. West, Sonoma, CA 95476 United States
AU: Yee, J
AF: Applied Physics Laboratory, Johns Hopkins University, Laurel, MD 21218 United States
AU: Trepte, C
AF: NASA Langley Research Center, MS 475, Hampton, VA 23681 United States
AU: Thomason, L
AF: NASA Langley Research Center, MS 475, Hampton, VA 23681 United States
AU: Pitts, M
AF: NASA Langley Research Center, MS 475, Hampton, VA 23681 United States
AU: Zawodny, J
AF: NASA Langley Research Center, MS 475, Hampton, VA 23681 United States
AU: Chu, W
AF: NASA Langley Research Center, MS 475, Hampton, VA 23681 United States
AU: Avery, M
AF: NASA Langley Research Center, MS 475, Hampton, VA 23681 United States
AU: Randall, C
AF: Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80309 United States
AU: Lumpe, J
AF: Computational Physics, Inc., 8001 Braddock Road, Springfield, VA 22151 United States
AU: Bevilacqua, R
AF: Naval Research Laboratory, 4555 Overlook Avenue, S.W., Washington, DC 20375 United States
AU: Bittner, M
AF: DLR (German Aerospace Center), Oberpfaffenhofen, Wessling, D-82234 Germany
AU: Erbertseder, T
AF: DLR (German Aerospace Center), Oberpfaffenhofen, Wessling, D-82234 Germany
AU: McPeters, R
AF: NASA Goddard Space Flight Center, Code 916, Greenbelt, MD 20771 United States
AB: During the Second SAGE III Ozone Loss and Validation Experiment (SOLVE II), the 14-channel NASA Ames Airborne Tracking Sunphotometer (AATS-14) was mounted on the NASA DC-8 and successfully measured spectra of total and aerosol optical depth (TOD and AOD) during the sunlit portions of eight science flights. Values of ozone column content above the aircraft have been derived from the AATS-14 data by using a linear least squares method that iteratively finds the ozone column content that yields the best match between measured and calculated TOD spectra. The calculations assume the known Chappuis ozone absorption band shape and a three-parameter AOD shape (quadratic in log-log space). AATS-14 includes seven channels within the Chappuis band, including one with its center wavelength (604.4 nm) near the peak, and three with center wavelengths (499.4, 519.4 and 675.1 nm) where ozone absorption is ~25-35 percent of that at the peak. For the typical DC-8 SOLVE II cruising altitudes of ~8-12 km and the background stratospheric aerosol conditions that prevailed during SOLVE II, ozone absorption comprised a significant fraction of the aerosol-plus-ozone optical depth measured in the four AATS-14 channels centered between 499.4 and 675.1 nm. Typical AODs above the DC-8 ranged from 0.003-0.008 in these channels. For comparison, an ozone overburden of 0.3 atm-cm (300 DU) translates to ozone optical depths of 0.009, 0.014, 0.041, and 0.012, respectively, at these same wavelengths. In this paper, we compare AATS-14 values of ozone column content with temporally and spatially near-coincident values derived from measurements acquired by the Stratospheric Aerosol and Gas Experiment III (SAGE III) and the Polar Ozone and Aerosol Measurement III (POAM III) satellite sensors. We also compare AATS-14 ozone retrievals during selected DC-8 latitudinal and longitudinal transects with total column ozone data acquired by the Total Ozone Mapping Spectrometer (TOMS) and the Global Ozone Monitoring Experiment (GOME) satellite sensors. To enable this comparison, the amount of ozone in the column below the aircraft is estimated by combining SAGE and/or POAM data with high resolution, fast response in-situ ozone measurements acquired during the DC-8 ascent at the start of each science flight.
UR: http://geo.arc.nasa.gov/sgg/AATS-website/
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0340 Middle atmosphere--composition and chemistry
DE: 0341 Middle atmosphere--constituent transport and chemistry (3334)
DE: 0360 Transmission and scattering of radiation
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting