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

被引：7
|
作者：
Long, D. A. [1 ]
Gameson, L. [1 ]
Truong, G. -W. [1 ,2 ]
Bielska, K. [1 ,3 ]
Cygan, A. [1 ,3 ]
Hodges, J. T. [1 ]
Whetstone, J. R. [4 ]
van Zee, R. D. [1 ]
机构：
[1] NIST, Div Chem Sci, Mat Measurement Lab, Gaithersburg, MD 20899 USA
[2] Univ Western Australia, Sch Phys, Frequency Stand & Metrol Res Grp, Perth, WA 6009, Australia
[3] Nicolaus Copernicus Univ, Inst Phys, Fac Phys Astron & Informat, Torun, Poland
[4] NIST, Off Special Programs, Gaithersburg, MD 20899 USA
来源：
JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY | 2013年 / 30卷 / 11期
关键词：
In situ atmospheric observations; Instrumentation; sensors; Surface observations; CH4; CO2; H2O; AIR; O-2; N-2;
D O I：
10.1175/JTECH-D-13-00039.1
中图分类号：
P75 [海洋工程];
学科分类号：
0814 ; 081505 ; 0824 ; 082401 ;
摘要：
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 approximate to 0.7 mol 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.
引用
收藏
页码：2604 / 2609
页数：6
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