TEMPERATURE-DEPENDENCE OF THE OZONE ABSORPTION-SPECTRUM OVER THE WAVELENGTH RANGE 410 TO 760 NM

The ozone, O3, absorption cross sections between 410 and 760 nm, the C happuis band, were measured at 220, 240, 260, and 280 K relative to th at 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 wavele ngths away from the peak, the absorption cross sections decreased with decreasing temperature; e.g., approximately 40% at 420 nm between 298 and 220 K. These results are compared with previous measurements and the impact on atmospheric measurements are discussed.