Venus: New Microwave Measurements Show No Atmospheric Water Vapor

Details Venus: New Microwave Measurements Show No Atmospheric Water Vapor Venus: New Microwave Measurements Show No Atmospheric Water Vapor

Mar 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973sci...179..994j&link_type=abstract

Science, Volume 179, Issue 4077, pp. 994-997

Physics

3

Scientific paper

Two sets of passive radio observations of Venus-measurements of the spectrum of the disk temperature near the 1-centimeter wavelength, and interferometric measurements of the planetary limb darkening at the 1.35-centimeter water vapor resonance-show no evidence of water vapor in the lower atmosphere of Venus. The upper limit of 2 × 10-3 for the mixing ratio of water vapor is substantially less than the amounts derived from the Venera space probes (0.5 × 10-2 to 2.5 × 10-2). This amount of water vapor cannot produce dense clouds, and it is doubtful that it may contribute significantly to a greenhouse effect.

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