Estimation of Total Atmospheric Ozone from GOES Sounder Radiances with High Temporal Resolution

Abstract

The potential for using Geostationary Operational Environmental Satellite (GOES) Sounder radiance measurements to monitor total atmospheric ozone is examined. A statistical regression using GOES Sounder spectral bands 1?15 radiances allows estimation of total atmospheric ozone. Hourly GOES ozone products have been generated since May 1998. GOES ozone estimates are compared with Total Ozone Mapping Spectrometer (TOMS) ozone measurements from the Earth Probe satellite and ground-based Dobson spectrometer ozone observations. Results show that the percentage root-mean-square (rms) difference between instantaneous TOMS and GOES ozone estimates ranges from 4% to 7%. Also, daily comparisons for 1998 between GOES ozone values and ground-based observations at Bismarck, North Dakota; Wallops Island, Virginia; and Nashville, Tennessee, show that the rms difference is approximately 21 Dobson units. Given the hourly measurements and high-spatial density provided by the GOES Sounder, GOES ozone estimates and associated products show promise.