High-resolution absorption cross section measurements of NO2 in the UV and visible region

Laboratory measurements of the absorption cross sections of NO2 at the temperature 298.5 K have been made throughout the wavelength region 360-470 nm. The equilibrium constant K-p has been experimentally obtained as 150 hPa, from which the column density of pure NO2 is obtained, The cross sections almost completely agree with the recent results of Merienne et al. [J. Atmos. Chem. 20 (1995) 281]. The cross sections at the higher resolution of 0.14 cm are also obtained in the wavelength region where the spectra have fine structure. (C) 1997 Elsevier Science B.V.