Absorption Spectrum of Water Vapour in the Region of 23 cm-1 at Low Temperatures

Details Absorption Spectrum of Water Vapour in the Region of 23 cm-1 at Low Temperatures Absorption Spectrum of Water Vapour in the Region of 23 cm-1 at Low Temperatures

Oct 1970

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970natur.228..156b&link_type=abstract

Nature, Volume 228, Issue 5267, pp. 156-157 (1970).

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Scientific paper

THE absorption of submillimetre radiation by the Earth's atmosphere is dominated by the pure rotation spectrum, of the water molecule. If we are looking at submillimetre wave spectra for evidence of the presence in the atmosphere of species other than monomeric water, then regions in the gaps between the more intense lines of this molecule are of particular importance. One of these gaps where a number of measurements have been made is in the vicinity of 23 cm-1 (435 µm wavelength). Here the absorption as measured by recording solar radiation coming through a slant path in the atmosphere is too great to be explained by considering only monomeric water vapour lines and magnetic dipole oxygen lines1. It is therefore of interest to investigate the cause of the additional absorption by making laboratory measurements.

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