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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 14 — May. 10, 2011
  • pp: 2098–2111

Atmospheric CO 2 measurements with a 2 μm airborne laser absorption spectrometer employing coherent detection

Gary D. Spiers, Robert T. Menzies, Joseph Jacob, Lance E. Christensen, Mark W. Phillips, Yonghoon Choi, and Edward V. Browell  »View Author Affiliations


Applied Optics, Vol. 50, Issue 14, pp. 2098-2111 (2011)
http://dx.doi.org/10.1364/AO.50.002098


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Abstract

We report airborne measurements of CO 2 column abundance conducted during two 2009 campaigns using a 2.05 μm laser absorption spectrometer. The two flight campaigns took place in the California Mojave desert and in Oklahoma. The integrated path differential absorption (IPDA) method is used for the CO 2 column mixing ratio retrievals. This instrument and the data analysis methodology provide insight into the capabilities of the IPDA method for both airborne measurements and future global-scale CO 2 measurements from low Earth orbit pertinent to the NASA Active Sensing of CO 2 Emissions over Nights, Days, and Seasons mission. The use of a favorable absorption line in the CO 2 2 μm band allows the on-line frequency to be displaced two (surface pressure) half-widths from line center, providing high sensitivity to the lower tropospheric CO 2 . The measurement repeatability and measurement precision are in good agreement with predicted estimates. We also report comparisons with airborne in situ measurements conducted during the Oklahoma campaign.

© 2011 Optical Society of America

OCIS Codes
(010.1280) Atmospheric and oceanic optics : Atmospheric composition
(010.3640) Atmospheric and oceanic optics : Lidar
(280.3420) Remote sensing and sensors : Laser sensors
(280.3640) Remote sensing and sensors : Lidar

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: January 19, 2011
Manuscript Accepted: February 10, 2011
Published: May 9, 2011

Citation
Gary D. Spiers, Robert T. Menzies, Joseph Jacob, Lance E. Christensen, Mark W. Phillips, Yonghoon Choi, and Edward V. Browell, "Atmospheric CO2 measurements with a 2 μm airborne laser absorption spectrometer employing coherent detection," Appl. Opt. 50, 2098-2111 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-14-2098

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