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 . 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 ) transmission spectra were recorded for multiple narrow spectral windows ( 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 ) Fourier transform spectroscopy data that were also recorded during the measurement campaign.
© 2012 Optical Society of AmericaFull Article | PDF Article
Chris D. Boone, Ray Nassar, Kaley A. Walker, Yves Rochon, Sean D. McLeod, Curtis P. Rinsland, and Peter F. Bernath
Appl. Opt. 44(33) 7218-7231 (2005)
Damien Weidmann, William J. Reburn, and Kevin M. Smith
Appl. Opt. 46(29) 7162-7171 (2007)
Lilian Joly, Claude Robert, Bertrand Parvitte, Valery Catoire, Georges Durry, Guy Richard, Bernard Nicoullaud, and Virginie Zéninari
Appl. Opt. 47(9) 1206-1214 (2008)