Measurement of total atmospheric ozone - Consequences entailed by new values of O3 absorption cross-sections at 223 K in the 310-350 nm spectral range

Details Measurement of total atmospheric ozone - Consequences entailed by new values of O3 absorption cross-sections at 223 K in the 310-350 nm spectral range Measurement of total atmospheric ozone - Consequences entailed by new values of O3 absorption cross-sections at 223 K in the 310-350 nm spectral range

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983p%26ss...31.1229d&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 31, Oct. 1983, p. 1229-1234.

Computer Science

5

Absorption Cross Sections, Atmospheric Composition, Near Ultraviolet Radiation, Ozonometry, Absorptivity, Atmospheric Temperature

Scientific paper

On the basis of results obtained at stratospheric temperatures, the average values of the absorption coefficients for the Dobson and backscattering ultraviolet wavelengths within the 310-350 nm spectral range are calculated by taking two types of functions representing the instrumental conditions (triangular for short wavelengths and trapezoidal for long wavelengths). These values are then compared with those used at present for atmospheric measurements (International Ozone Commission, 1968) and with values calculated from the results obtained by Bass and Paur (1982) at 228 K. The agreement in relative values with those of Bass and Paur is found to be quite satisfactory. The lack of agreement at 339.8 nm can readily be explained by the low values of the absorption coefficients. It is therefore assumed that the average coefficient for the missing Dobson wavelengths (center at 305.5 nm) should be 92 percent of the value proposed by Bass and Paur. It is also believed that the coefficients for the measurement of atmospheric ozone at Dobson wavelengths AD and CD are, respectively, 4 percent and 3 percent below the present values of the International Ozone Commission. It is noted that these coefficients correspond to a change of about 4 percent in the amount of ozone in the atmosphere.

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