Below Room Temperature Measurements Of The 8-12 M Water Vapor Continuum Absorption

G. L. Loper; J. A. Gelbwachs

doi:10.1117/12.931900

28 July 1981 Below Room Temperature Measurements Of The 8-12 μ M Water Vapor Continuum Absorption

G. L. Loper, J. A. Gelbwachs

Proceedings Volume 0277, Atmospheric Transmission; (1981) https://doi.org/10.1117/12.931900
Event: 1981 Technical Symposium East, 1981, Washington, D.C., United States

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.

Citation Download Citation

G. L. Loper and J. A. Gelbwachs "Below Room Temperature Measurements Of The 8-12 μ M Water Vapor Continuum Absorption", Proc. SPIE 0277, Atmospheric Transmission, (28 July 1981); https://doi.org/10.1117/12.931900

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