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Ground-based solar absorption FTIR spectroscopy: characterization of retrievals and first results from a novel optical design instrument at a new NDACC complementary station

Journal Article


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Abstract


  • The authors describe the optical design of a high-resolution Fourier Transform Spectrometer (FTS), which serves as the primary instrument at the University of Toronto Atmospheric Observatory (TAO). The FTS is dedicated to ground-based infrared solar absorption atmospheric measurements from Toronto, Ontario, Canada. Instrument performance is discussed in terms of instrumental line shape (ILS) and phase error and modulation efficiency as a function of optical path difference. Typical measurement parameters are presented together with retrieval parameters used to derive total and partial column concentrations of ozone. Retrievals at TAO employ the optimal estimation method (OEM), and some impacts of the necessary a priori constraints are examined. In March 2004, after participating in a retrieval algorithm user intercomparison exercise, the TAO FTS was granted the status of a Complementary Observation Station within the international community of high-resolution FTS users in the Network for the Detection of Atmospheric Composition and Change (NDACC). During this exercise, average differences between total columns retrieved from the same spectra by different users were below 2.1% for O3, HCl, and N2O in the blind phase, and below 1% in the open phase, when all retrieval constraints were identical. Finally, a 2.5-yr time series of monthly mean stratospheric ozone columns agrees within 3% with those retrieved from Optical Spectrograph and Infrared Imager System (OSIRIS) measurements on board the Odin satellite, which is within the errors of both measurement platforms.

Authors


  •   Waiacek, Aldona (external author)
  •   Taylor, J R. (external author)
  •   Strong, Kimberly (external author)
  •   Saari, R (external author)
  •   Kertzenmacher, T (external author)
  •   Jones, Nicholas B.
  •   Griffith, David W. T.

Publication Date


  • 2007

Citation


  • Waiacek, A., Taylor, J. R., Strong, K., Saari, R., Kertzenmacher, T. E., Jones, N. B. & Griffith, D. W. T. (2007). Ground-based solar absorption FTIR spectroscopy: characterization of retrievals and first results from a novel optical design instrument at a new NDACC complementary station. Journal of Atmospheric and Oceanic Technology, 24 (3), 432-448.

Scopus Eid


  • 2-s2.0-34047235186

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=7513&context=scipapers

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/4171

Number Of Pages


  • 16

Start Page


  • 432

End Page


  • 448

Volume


  • 24

Issue


  • 3

Abstract


  • The authors describe the optical design of a high-resolution Fourier Transform Spectrometer (FTS), which serves as the primary instrument at the University of Toronto Atmospheric Observatory (TAO). The FTS is dedicated to ground-based infrared solar absorption atmospheric measurements from Toronto, Ontario, Canada. Instrument performance is discussed in terms of instrumental line shape (ILS) and phase error and modulation efficiency as a function of optical path difference. Typical measurement parameters are presented together with retrieval parameters used to derive total and partial column concentrations of ozone. Retrievals at TAO employ the optimal estimation method (OEM), and some impacts of the necessary a priori constraints are examined. In March 2004, after participating in a retrieval algorithm user intercomparison exercise, the TAO FTS was granted the status of a Complementary Observation Station within the international community of high-resolution FTS users in the Network for the Detection of Atmospheric Composition and Change (NDACC). During this exercise, average differences between total columns retrieved from the same spectra by different users were below 2.1% for O3, HCl, and N2O in the blind phase, and below 1% in the open phase, when all retrieval constraints were identical. Finally, a 2.5-yr time series of monthly mean stratospheric ozone columns agrees within 3% with those retrieved from Optical Spectrograph and Infrared Imager System (OSIRIS) measurements on board the Odin satellite, which is within the errors of both measurement platforms.

Authors


  •   Waiacek, Aldona (external author)
  •   Taylor, J R. (external author)
  •   Strong, Kimberly (external author)
  •   Saari, R (external author)
  •   Kertzenmacher, T (external author)
  •   Jones, Nicholas B.
  •   Griffith, David W. T.

Publication Date


  • 2007

Citation


  • Waiacek, A., Taylor, J. R., Strong, K., Saari, R., Kertzenmacher, T. E., Jones, N. B. & Griffith, D. W. T. (2007). Ground-based solar absorption FTIR spectroscopy: characterization of retrievals and first results from a novel optical design instrument at a new NDACC complementary station. Journal of Atmospheric and Oceanic Technology, 24 (3), 432-448.

Scopus Eid


  • 2-s2.0-34047235186

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=7513&context=scipapers

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/4171

Number Of Pages


  • 16

Start Page


  • 432

End Page


  • 448

Volume


  • 24

Issue


  • 3