Physics – Optics
Scientific paper
Feb 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982georl...9..131g&link_type=abstract
Geophysical Research Letters, vol. 9, Feb. 1982, p. 131-134.
Physics
Optics
16
Atmospheric Optics, Atmospheric Temperature, Emission Spectra, Mesosphere, Turbulent Diffusion, Water Vapor, Data Reduction, Least Squares Method, Line Spectra, Opacity, Spectrum Analysis, Temperature Effects
Scientific paper
Thacker et al. (1981) have described some new measurements of mesospheric water vapor, taking into account ground-based radiometric observations of a rotational transition at 22.2 GHz. The measurements were inverted to provide profiles of mesospheric water vapor mixing ratios from about 50 km altitude to about 85 km altitude. The present investigation is concerned with an analysis of data published earlier, on the short-term variability of mesospheric water vapor. It is found that the intensity of the 22.2 GHz emission line can vary by factors of 2-3 over periods of several hours or days. The variations in the intensity of the 22.2 GHz emission line must be caused by changes in the number of H2O molecules in the mesosphere which are in the antenna beam. The obtained data might indicate indirectly that the concentration in the lower mesosphere of water vapor molecules may be controlled both by chemical processes and by transport processes.
Bevilacqua Richard M.
Gibbins C. J.
Schwartz Phil R.
Thacker D. L.
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