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Proceedings Paper

Below Room Temperature Measurements Of The 8-12 M Water Vapor Continuum Absorption
Author(s): G. L. Loper; J. A. Gelbwachs
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Paper Abstract

The CO2 laser photoacoustic technique has been used to measure 002 laser absorption spectra of water vapor/air mixtures containing various water vapor partial pressures at selected temperatures down to 10°C. At CO2 laser wavelengths where water vapor continuum absorption contributions are dominant, the water absorp-tion possesses a temperature coefficient of -2.2%/°C between 27°C and 10°C. At the fixed temperatures em-ployed, the water continuum possesses a dependence on water vapor partial pressure that includes both linear and quadratic terms. A similar temperature coefficient and water partial pressure dependence has been observed in previous studies of water continuum absorption between room temperature and 100°C.

Paper Details

Date Published: 28 July 1981
PDF: 8 pages
Proc. SPIE 0277, Atmospheric Transmission, (28 July 1981); doi: 10.1117/12.931900
Show Author Affiliations
G. L. Loper, The Aerospace Corporation (United States)
J. A. Gelbwachs, The Aerospace Corporation (United States)

Published in SPIE Proceedings Vol. 0277:
Atmospheric Transmission
Robert W. Fan, Editor(s)

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