Comparison of simultaneous CO2 and H2O observations of Venus

Details Comparison of simultaneous CO2 and H2O observations of Venus Comparison of simultaneous CO2 and H2O observations of Venus

Jun 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jats...32.1071b&link_type=abstract

(NASA, State University of New York, AAS, and AGU, Conference on the Atmosphere of Venus, NASA Goddard Institute for Space Studi

Computer Science

2

Atmospheric Composition, Carbon Dioxide, Venus Atmosphere, Water Vapor, Absorption Spectra, Abundance, Atmospheric Moisture, Molecular Spectra

Scientific paper

Results are reported for 115 pairs of CO2 and H2O abundance determinations made with the coude scanner of a 2.7 m reflector. The pairs of observations were made over the same area of the illuminated disk of Venus with the guiding, seeing and slit-placement errors less than 15 per cent of the disk diameter. A correlation analysis of the pairs of observations grouping them into eight periods of time which corresponded to telescope observing runs or periods of similar phase angle shows a lack of correlation in all except one period. For this set, the H2O abundances were positively correlated with the relative CO2 line strengths for measurements of the 8689-A and 7820-A CO2 bands made on the same day. Comparison of abundances on some 25 individual days shows a positive correlation on one day and a marginal negative correlation on two days, with no correlation on the remaining 22 days. On the basis of the lack of correlations, it is concluded that either the H2O level of line formation does not fluctuate in phase with the observed CO2 absorption fluctuations or the horizontal distribution of the H2O vapor must be inhomogeneous.

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