15min:
AIR-BROADENED LINE WIDTHS AND SHIFTS IN THE nu3 BAND OF 16O3 AT TEMPERATURES BETWEEN 160 AND 300 K.

M. A. H. SMITH, C. P. RINSLAND, Science Directorate, NASA Langley Research Center, Hampton, VA 23681-2199; V. MALATHY DEVI, D. CHRIS BENNER, Department of Physics, The College of William and Mary, Williamsburg, VA 23187-8795; AND A. M. COX, New Horizons Governor's School for Science and Technology, Hampton, VA 23666 and Poquoson High School, Poquoson, VA 23662.

The 9.6-µm bands of O3 are used by many remote-sensing experiments for retrievals of terrestrial atmospheric ozone concentration profiles. Line parameter errors can contribute significantly to the total errors in these retrievals, particularly for nadir-viewing. We have used the McMath-Pierce Fourier transform spectrometer at the National Solar Observatory on Kitt Peak to record numerous high-resolution infrared absorption spectra of O3 broadened by various gases at temperatures between 160 and 300 K. Over 25 air-broadened spectra were analyzed simultaneously using a multispectrum nonlinear least squares technique to determine Lorentz pressure-broadening and pressure-induced shift coefficients along with their temperature dependences for selected P- and R-branch transitions in the nu3 fundamental band of 16O3. We have compared the present results with other measurements reported in the literature for O3 broadened by air or by N2.