The far infrared continuum absorption of water vapor

Details The far infrared continuum absorption of water vapor The far infrared continuum absorption of water vapor

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jqsrt..50..673d&link_type=abstract

Journal of Quantitative Spectroscopy & Radiative Transfer (ISSN 0022-4073), vol. 50, no. 6, p. 673-694

Computer Science

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5

Earth Atmosphere, Far Infrared Radiation, Infrared Absorption, Spectrum Analysis, Transmittance, Water Vapor, Correlation, Nimbus 7 Satellite, Nitrogen, Radiometers, Remote Sensing, Simulation

Scientific paper

The far infrared transmittance of H2O has been meaured in the laboratory. A gas correlation radiometric technique was adopted for comparison with atmospheric H2O measurements made by the Stratospheric and Mesospheric Sounder on Nimbus 7. Atmospheric paths were simulated in a multipass cell containing pure H2O and H2O + N2 mixtures at various pressures and temperatures. A spectral transmittance model was developed using the simple Lorentz line shape and the HITRAN molecular line database and was compared with the transmittance measurements. The self-broadened continuum absorption, spectrally averaged over a passband centered at 7.85 THz (262/cm), was determined and confirmed the continuum model of Clough et al. The foreign-broadened continuum was smaller by a factor of at least 19.

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