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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 36 — Dec. 20, 2012
  • pp: 8779–8792

Atmospheric vertical profiles of O3, N2O, CH4, CCl2F2, and H2O retrieved from external-cavity quantum-cascade laser heterodyne radiometer measurements

Tracy R. Tsai, Rebecca A. Rose, Damien Weidmann, and Gerard Wysocki  »View Author Affiliations


Applied Optics, Vol. 51, Issue 36, pp. 8779-8792 (2012)
http://dx.doi.org/10.1364/AO.51.008779


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Abstract

Atmospheric vertical profiles of ozone, nitrous oxide, methane, dichlorodifluoromethane, and water are retrieved from data collected with a widely tunable external-cavity quantum-cascade laser heterodyne radiometer (EC-QC-LHR) covering a spectral range between 1120 and 1238cm1. The instrument was operated in solar occultation mode during a two-month measurement campaign at Rutherford Appleton Laboratory in Oxfordshire, UK, in winter 2010/2011, and ultrahigh-resolution (60 MHz or 0.002cm1) transmission spectra were recorded for multiple narrow spectral windows (1cm1 width) specific to each molecule. The ultrahigh spectral resolution of the EC-QC-LHR allows retrieving altitudinal profiles from transmission spectra that contain only few (1–3) significant absorption lines of a target molecule. Profiles are validated by comparing with European Centre for Medium-Range Weather Forecasts operational atmospheric profiles (ozone and water), with other data in the literature (nitrous oxide, methane, dichlorodifluoromethane), and with retrievals from a lower resolution (600 MHz or 0.02cm1) Fourier transform spectroscopy data that were also recorded during the measurement campaign.

© 2012 Optical Society of America

OCIS Codes
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(300.6310) Spectroscopy : Spectroscopy, heterodyne
(280.4991) Remote sensing and sensors : Passive remote sensing
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade

ToC Category:
Spectroscopy

History
Original Manuscript: August 17, 2012
Manuscript Accepted: November 2, 2012
Published: December 20, 2012

Citation
Tracy R. Tsai, Rebecca A. Rose, Damien Weidmann, and Gerard Wysocki, "Atmospheric vertical profiles of O3, N2O, CH4, CCl2F2, and H2O retrieved from external-cavity quantum-cascade laser heterodyne radiometer measurements," Appl. Opt. 51, 8779-8792 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-36-8779

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