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Publication Citation: Results from the International Halocarbons in Air Comparison Experiment (IHALACE)

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Author(s): Bradley Hall; George C. Rhoderick; A Engel; J. Muhle; J. W. Elkins; F. Artuso; E. Atlas; M. Aydin; D. Blake; E. G. Brunke; S. Chiavarini; P. J. Fraser; J. Happell; P. B. Krummel; I. Levin; M. Loewenstein; M. Malone; S. A. Montzka; S. O'Doherty; S. Reimann; E. S. Saltzman; H. E. Scheel; L. P. Steele; M. K. Vollmer; R. F. Weiss; D. Worthy; Y. Yokouchi;
Title: Results from the International Halocarbons in Air Comparison Experiment (IHALACE)
Published: June 01, 2013
Abstract: The International Halocarbons in Air Comparison Experiment (IHALACE) was conducted to document relationships between calibrations scales among various laboratories that measure atmospheric greenhouse and ozone depleting gases. Six stainless steel cylinders containing natural and modified natural air samples were circulated among 19 laboratories. Results from this experiment reveal relatively good agreement among commonly used calibration scales for a number of trace gases, such as chlorofluorocarbons (CFCs), hydrofluorochlorocarbons (HCFCs), and hydrofluorocarbons (HFCs). Some scale relationships were found to be consistent with those derived from bi-lateral experiments or from analysis of atmospheric data, while others revealed discrepancies. However, the transfer of calibration scales among laboratories is problematic in many cases, meaning that measurements tied to a common scale may not, in fact, be compatible. These findings illustrate the need for improved communication and coordination of calibration activities in the measurement of halogenated and related trace gases.
Citation: Atmospheric Measurement Techniques
Pages: pp. 8021 - 8069
Keywords: international comparison, climate change, halocarbons, atmospheric measurements
Research Areas: Climate Science Measurements, Environment/Climate
DOI: http://dx.doi.org/10.5194/amtd-6-8021-2013  (Note: May link to a non-U.S. Government webpage)
PDF version: PDF Document Click here to retrieve PDF version of paper (4MB)