EFFECTIVE BASS-PAUR 1985 OZONE ABSORPTION-COEFFICIENTS FOR USE WITH DOBSON OZONE SPECTROPHOTOMETERS

Details are presented concerning the derivation of new, standard, effe ctive ozone absorption coefficients for use with Dobson ozone spectrop hotometers. The work was performed under auspices of the World Meteoro logical Organization (WMO) Global Ozone Research and Monitoring Progra m, with the goal of improving and standardizing ozone measurements thr oughout the world. The new coefficients, based on the laboratory measu rements of Bass and Paur (1985), were sanctioned for use worldwide, be ginning January 1, 1992, by the WMO Executive Panel on Environmental P ollution and Atmospheric Chemistry. The new coefficients, together wit h use of slightly improved Rayleigh molecular scattering coefficients also adopted as standard, yield total ozone amounts 2.6% smaller than values obtained during July 1, 1957 to December 31, 1991, derived from the use of Vigroux (1953, 1967) ozone absorption coefficients. Inform ation is provided also on correcting ozone data obtained in the past t o the new ozone absorption coefficient scale.