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|Title:||The effects of variations in buffer gas mixing ratios on commercial carbon dioxide cavity ring-down spectroscopy sensors|
|Author:||Long, David A.|
Hodges, Joseph T.
Whetstone, James R.
van Zee, Roger D.
|Citation:||Journal of Atmospheric and Oceanic Technology, 2013; 30(11):2604-2609|
|Publisher:||American Meteorological Society|
|School/Discipline:||School of Chemistry and Physics|
|Organisation:||Institute for Photonics & Advanced Sensing (IPAS)|
|D. A. Long, L. Gameson, G.-W. Truong, K. Bielska, A. Cygan, J. T. Hodges, J. R. Whetstone and R. D. van Zee|
|Abstract:||Primary gas standards, gas chromatography, and 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 μmol mol−1 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.|
|Keywords:||In situ atmospheric observations; Instrumentation/sensors; Surface observations|
|Rights:||Copyright status unknown|
|Appears in Collections:||IPAS publications|
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