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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 45, Iss. 18 — Jun. 20, 2006
  • pp: 4366–4382

Measurements of the foreign-broadened continuum of water vapor in the 6.3 μm band at −30 °C

Penny M. Rowe, Von P. Walden, and Stephen G. Warren  »View Author Affiliations

Applied Optics, Vol. 45, Issue 18, pp. 4366-4382 (2006)

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The foreign-broadened continuum of water vapor in the ν 2 band ( 5 7.7   μm , 1300 2000 cm - 1 ) is important for satellite-based retrievals of water vapor in the upper troposphere, where temperatures are below 25 ° C . Continuum coefficients have previously been measured mostly at or above + 23 ° C . We present continuum coefficients in the ν 2 band retrieved from measurements made in Antarctica at temperatures near 30 ° C : atmospheric transmission at South Pole Station and atmospheric emission at Dome C. The continuum coefficients derived from these measurements are generally in agreement with the widely used Mlawer, Tobin–Clough, Kneizys, Davies continuum. Differences are at most 30% , corresponding to a 6% relative error in retrieved upper-tropospheric humidity.

© 2006 Optical Society of America

OCIS Codes
(010.1280) Atmospheric and oceanic optics : Atmospheric composition
(010.1320) Atmospheric and oceanic optics : Atmospheric transmittance
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(300.6340) Spectroscopy : Spectroscopy, infrared

ToC Category:
Atmospheric and Oceanic Optics

Original Manuscript: September 27, 2005
Manuscript Accepted: January 6, 2006

Penny M. Rowe, Von P. Walden, and Stephen G. Warren, "Measurements of the foreign-broadened continuum of water vapor in the 6.3 μm band at −30 °C," Appl. Opt. 45, 4366-4382 (2006)

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