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

页码：2604 / 2609

页数：6

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