Physics
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.7105d&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 93, June 20, 1988, p. 7105-7112.
Physics
46
Absorption Cross Sections, Atmospheric Temperature, Fourier Transformation, Nitrogen Dioxide, Photochemical Reactions, Ultraviolet Absorption, Atmospheric Chemistry, Spectral Resolution, Temperature Dependence
Scientific paper
A redetermination of the temperature dependence of the absorption cross-section (sigma) of NO2 in the visible-ultraviolet region was made in order to provide a more reliable data base for the calculation of NO2 photolysis rates in the atmosphere. Experiments over a wide range of temperatures and NO2 concentrations were conducted. The integral of a plot of sigma versus the inverse of the wavelength was essentially independent of temperature. Increasing temperature produced a shift of the spectrum toward longer wavelengths, resulting in a small negative temperature dependence of sigma over the 264-400 nm range and a small positive dependence over the 450-649 nm range. Increasing temperature produced broadening of individual spectral features, resulting in a systematic lowering of peaks and filling of valleys. Recommended cross sections are presented for use in tropospheric NO2 photolysis rate calculations.
Cantrell Christopher A.
Davidson Jacqueline A.
Madronich Sasha
McDaniel Anthony H.
Shetter Richard E.
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