Water Vapor Continuum Absorption In The Infrared

Kenneth O. White

doi:10.1117/12.957924

19 December 1979 Water Vapor Continuum Absorption In The Infrared

Kenneth O. White

Proceedings Volume 0195, Atmospheric Effects on Radiative Transfer; (1979) https://doi.org/10.1117/12.957924
Event: 23rd Annual Technical Symposium, 1979, San Diego, United States

Abstract

Water vapor absorption measurements and comparisons with predictions are discussed along with ongoing and planned research efforts. Hydrogen fluoride (2.7-3.0 μm) laser line measurements as functions of temperature and pressure are presented. Comparisons of these results with predictions suggest the need for using an improved set of absorption line strengths, and a super Lorentz/Voigt line shape. Results thus far have been carried to -18°C although ongoing efforts plan to extend these to -50°C. Deuterium fluoride (3.5-4.0 μm) laser line measurements have been made under mid-latitude summer conditions and as a function of temperature and pressure. The measured absorption in this region is about twice as large as current predictions and ex-hibits a larger self-broadening term. These results can be modeled by assuming both a far wing and a water-aggregate contribution. Other ongoing efforts include determination of pressure and temperature dependencies of water vapor absorption in the 8-12μm region using a carbon dioxide laser including considerations of possible dimer contributions as well as similar measurements in the 0.3-2mm region using a far infrared/submillimeter laser. Possible physical models for the water vapor absorption (continuum or anomalous absorption) in the 3-5 μm and 8-12μm regions are also discussed.

Citation Download Citation

Kenneth O. White "Water Vapor Continuum Absorption In The Infrared", Proc. SPIE 0195, Atmospheric Effects on Radiative Transfer, (19 December 1979); https://doi.org/10.1117/12.957924

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available