Temperature dependence of the ozone absorption spectrum over the wavelength range 410 to 760 nm

Physics

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Atmospheric Composition And Structure: Transmission And Scattering Of Radiation, Atmospheric Composition And Structure: Middle Atmosphere-Composition And Chemistry, Atmospheric Composition And Structure: Troposphere-Composition And Chemistry

Scientific paper

The ozone, O3, absorption cross sections between 410 and 760 nm, the Chappuis band, were measured at 220, 240, 260, and 280 K relative to that at room temperature using a diode array spectrometer. The measured cross sections varied very slightly, <1%, with decreasing temperature between 550 and 660 nm, near the peak of the Chappuis band. At wavelengths away from the peak, the absorption cross sections decrease with decreasing temperature; e.g., ~40% at 420 nm between 298 and 220 K. These results are compared with previous measurements and the impact on atmospheric measurements are discussed.

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