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Keronen, P., Reissell, A., Siivola, E., Vesala, T., Pohja, T., Hiltunen, V., Hatakka, J., Aalto, T., et al. (2014). Accurate measurements of CO2 mole fraction in the atmospheric surface layer by an affordable instrumentation. Boreal Environment Research 19 (supp.B) 35-54.
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Abstract
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.
| Item Type: | Article |
|---|---|
| Research Programs: | Exploratory and Special projects (ESP) |
| Bibliographic Reference: | Boreal Environment Research; 19(Suppl.B):35-54 (30 September 2014) (Published online 4 September 2014) |
| Related URLs: | |
| Depositing User: | IIASA Import |
| Date Deposited: | 15 Jan 2016 08:50 |
| Last Modified: | 27 Aug 2021 17:39 |
| URI: | https://pure.iiasa.ac.at/10847 |
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