The Effects of Variations in Buffer Gas Mixing Ratios on Commercial Carbon Dioxide Cavity Ring-Down Spectroscopy Sensors

frequency-stabilized cavity ring-down spectroscopy measurements have been used to assess the effect of variations in the argon mixing ratio on the CO2 mixing ratios reported by commercial cavity ring-down spectroscopy sensors. Supporting calculations demonstrate that the use of argon-free, synthetic...

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Bibliographic Details
Published inJournal of atmospheric and oceanic technology Vol. 30; no. 11; pp. 2604 - 2609
Main Authors Long, DA, Gameson, L, Truong, G W, Bielska, K, Cygan, A, Hodges, J T, Whetstone, J T, van Dee, RD
Format Journal Article
LanguageEnglish
Published Boston American Meteorological Society 01.11.2013
Subjects
Argon
Bias
Carbon dioxide
Gas chromatography
Holes
Marine
Meteorology
Mixing ratios
Sensors
Spectroscopy
Spectrum analysis
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Summary:frequency-stabilized cavity ring-down spectroscopy measurements have been used to assess the effect of variations in the argon mixing ratio on the CO2 mixing ratios reported by commercial cavity ring-down spectroscopy sensors. Supporting calculations demonstrate that the use of argon-free, synthetic air standards can lead to a bias of 0.7 mol mol1 at atmospheric concentration levels of CO2 as a result of pressure-broadening effects. This bias is an order of magnitude greater than the precision of the best commercial sensors and significantly exceeds the World Meteorological Organization's target compatibility goal.
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ISSN:0739-0572
1520-0426
DOI:10.1175/JTECH-D-13-00039.1