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dc.contributor.authorZellweger, Christoph
dc.contributor.authorEmmenegger, Lukas
dc.contributor.authorFirdaus, Mohd
dc.contributor.authorHatakka, Juha
dc.contributor.authorHeimann, Martin
dc.contributor.authorKozlova, Elena
dc.contributor.authorSpain, T. Gerard
dc.contributor.authorSteinbacher, Martin
dc.contributor.authorvan der Schoot, Marcel V.
dc.contributor.authorBuchmann, Brigitte
dc.date.accessioned2018-09-20T16:28:59Z
dc.date.available2018-09-20T16:28:59Z
dc.date.issued2016-09-26
dc.identifier.citationZellweger, Christoph; Emmenegger, Lukas; Firdaus, Mohd; Hatakka, Juha; Heimann, Martin; Kozlova, Elena; Spain, T. Gerard; Steinbacher, Martin; van der Schoot, Marcel V. Buchmann, Brigitte (2016). Assessment of recent advances in measurement techniques for atmospheric carbon dioxide and methane observations. Atmospheric Measurement Techniques 9 (9), 4737-4757
dc.identifier.issn1867-8548
dc.identifier.urihttp://hdl.handle.net/10379/14518
dc.description.abstractUntil recently, atmospheric carbon dioxide (CO2) and methane (CH4) measurements were made almost exclusively using nondispersive infrared (NDIR) absorption and gas chromatography with flame ionisation detection (GC/FID) techniques, respectively. Recently, commercially available instruments based on spectroscopic techniques such as cavity ring-down spectroscopy (CRDS), off-axis integrated cavity output spectroscopy (OA-ICOS) and Fourier transform infrared (FTIR) spectroscopy have become more widely available and affordable. This resulted in a widespread use of these techniques at many measurement stations. This paper is focused on the comparison between a CRDS "travelling instrument" that has been used during performance audits within the Global Atmosphere Watch (GAW) programme of the World Meteorological Organization (WMO) with instruments incorporating other, more traditional techniques for measuring CO2 and CH4 (NDIR and GC/FID). We demonstrate that CRDS instruments and likely other spectroscopic techniques are suitable for WMO/GAW stations and allow a smooth continuation of historic CO2 and CH4 time series. Moreover, the analysis of the audit results indicates that the spectroscopic techniques have a number of advantages over the traditional methods which will lead to the improved accuracy of atmospheric CO2 and CH4 measurements.
dc.publisherCopernicus GmbH
dc.relation.ispartofAtmospheric Measurement Techniques
dc.subjectcavity ring
dc.subjectairborne measurements
dc.subjectco2 measurements
dc.subjectmole fractions
dc.subjecttrace-gas
dc.subjectmauna-loa
dc.subjectair
dc.subjectch4
dc.subjectspectroscopy
dc.subjectanalyzer
dc.titleAssessment of recent advances in measurement techniques for atmospheric carbon dioxide and methane observations
dc.typeArticle
dc.identifier.doi10.5194/amt-9-4737-2016
dc.local.publishedsourcehttps://www.atmos-meas-tech.net/9/4737/2016/amt-9-4737-2016.pdf
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