O3ABSTR93.INF 9/28/93 MEASUREMENTS OF ABSOLUTE ABSORPTION CROSS SECTIONS OF OZONE IN THE 185-TO 254-nm WAVELENGTH REGION AND THE TEMPERATURE DEPENDENCE Journal of Geophysical Research, March 20, 1993, 98(D3): 5205-5211 K. YOSHINO, J.R. ESMOND, D.E. FREEMAN AND W.H. PARKINSON Harvard-Smithsonian Center for Astrophysics 60 Garden St., Cambridge, MA 02138, U.S.A. ABSTRACT Laboratory measurements of the relative absorption cross sections of ozone at the temperatures 195, 228 and 295 K have been made throughout the wavelength region 185-254 nm. The absolute absorption cross sections at the same temperatures have been measured at several discrete wavelengths in the region 185-254 nm. The absolute cross sections of ozone have been used to put relative cross sections on a firm absolute basis throughout the region 185-255 nm. These recalibrated cross sections below 250 nm are slightly lower than those of Molina and Molina (J. Geophys. Res., 91, 14501 (1986) ), but differences are within a few percent and would not be significant in atmospheric applications. ------------------------------------------------------------ These measured cross sections supersede the earlier high resolution measurements published (Planet. Space Sci., 32(2): 239-248, (1984); and Planet. Space Sci., 36(4): 395-398, (1988) ) in the region where they overlap.