PRODUCTION OF O(D-1) FROM PHOTOLYSIS OF O-3

We have used a model accounting for absorption by vibrationally and rotationally excited ozone (O-3) to examine published measurements of the quantum yield of O(D-1) and O-2((1) Delta(g)) from O-3 photolysis in the Huggins band (305-325 nm). We conclude that the quantum yield of O(D-1) is 0.2-0.3 for wavelengths between 312 and 320 nm at 298 K; in contrast, the JPL recommended quantum yield of O(D-1) is negligible in this wavelength region. We present a compilation of our results at temperatures and wavelengths relevant to atmospheric calculations. Production of O(D-1) from excited O-3 increases calculated concentrations of O(D-1) by up to 40% and OH by 15% for the troposphere and lower stratosphere.