Accurate measurements of CO2 mole fraction in the atmospheric surface layer by an affordable instrumentation
Accurate measurements of CO2 mole fraction in the atmospheric surface layer by an affordable instrumentation
复制标题
通过经济实惠的仪器准确测量大气表层中的二氧化碳摩尔分数
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
T. Vesala
中科院分区：
文献类型：
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作者：
P. Keronen;A. Reissell;F. Chevallier;E. Siivola;T. Pohja;V. Hiltunen;J. Hatakka;T. Aalto;L. Rivier;P. Ciais;A. Jordan;P. Hari;Y. Viisanen;T. Vesala
We aimed to assess the feasibility of an affordable instrumentation, based on a non-dispersive infrared analyser, to obtain atmospheric CO2 mole fraction data for background CO2 measurements from a flux tower site in southern Finland. The measurement period was November 2006 to December 2011. We describe the instrumentation, calibration, measurements and data processing and a comparison between two analysers, inter-comparisons with a flask sampling system and with reference gas cylinders and a comparison with an independent inversion model. The obtained accuracy was better than 0.5 ppm. The inter-comparisons showed discrepancies ranging from -0.3 ppm to 0.06 ppm between the measured and reference data. The comparison between the analyzers showed a 0.1 +/- 0.4 ppm difference. The trend and phase of the measured and simulated data agreed generally well and the bias of the simulation was 0.2 +/- 3.3 ppm. The study highlighted the importance of quantifying all sources of measurement uncertainty.
影响因子：
11.4
作者：
Le Quere, C.;Andres, R. J.;Zeng, N.
通讯作者：
Zeng, N.