An Intercomparison of Ground-Based Solar FTIR Measurements of Atmospheric Gases at Eureka, Canada

Research output: Contribution to journalArticle


The authors report the results of an intercomparison of vertical column amounts of hydrogen chloride (HCl), hydrogen fluoride (HF), nitrous oxide (N(2)O), nitric acid (HNO(3)), methane (CH(4)), ozone (O(3)), carbon dioxide (CO(2)), and nitrogen (N(2)) derived from the spectra recorded by two ground-based Fourier transform infrared (FTIR) spectrometers operated side-by-side using the sun as a source. The procedure used to record spectra and derive vertical column amounts follows the format of previous instrument intercomparisons organized by the Network for the Detection of Atmospheric Composition Change (NDACC), formerly known as the Network for Detection of Stratospheric Change (NDSC). For most gases the differences were typically around 3%, and in about half of the results the error bars given by the standard deviation of the measurements from each instrument did not overlap. The worst level of agreement was for HF where differences of over 5% were typical. The level of agreement achieved during this intercomparison is a little worse than that achieved in previous intercomparisons between ground-based FTIR spectrometers.


  • C. Paton-Walsh
  • R. L. Mittermeier
  • W. Bell
  • H. Fast
  • N. B. Jones
  • Arndt Meier
External organisations
  • External Organization - Unknown
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Earth and Related Environmental Sciences
Original languageEnglish
Pages (from-to)2028-2036
JournalJournal of Atmospheric and Oceanic Technology
Issue number11
StatePublished - 2008
Publication categoryResearch
Externally publishedYes