A new interpretation of the Venera 11 spectra of Venus: I. The 0.94-μm water band |
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Authors: | LDG Young AT Young LV Zasova |
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Institution: | Department of Astronomy, San Diego State University, San Diego, California 92182, USA;Space Research Institute, Moscow, USSR |
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Abstract: | Band models for CO2 and H2O absorption are described, and used to model the Venera 11 spectra near 1 μm. An effective-path approximation is used to allow for scattering in the clouds. The model has 10 layers and uses 211 CO2 and 15 H2O vibrational transitions, at 5 cm? resolution. Within a factor of 2, a maximum absorption in the 0.94-μm H2O band just below the clouds, corresponding to 200 ppm by volume, in agreement with V. I. Moroz, N. A. Parfen'ev, and N. F. San'ko (1979, Cosmic Res. 17, 601–614) is found. More accurate band strenghts are needed to model the bottom scale height accurately. The possibility that the 0.94-μm feature is blended with a band of some other molecule has been examined. Ten possible chemical species were examined, with negative results. |
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