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Calibration of sealed HCl cells used for TCCON instrumental line shape monitoring

dc.contributor.authorHase, F.
dc.contributor.authorDrouin, B.J.
dc.contributor.authorRoehl, C.M.
dc.contributor.authorToon, G.C.
dc.contributor.authorWennberg, P.O.
dc.contributor.authorWunch, D.
dc.contributor.authorBlumenstock, T.
dc.contributor.authorDesmet, F.
dc.contributor.authorFeist, D.G.
dc.contributor.authorHeikkinen, P.
dc.contributor.authorDe Maziere, M.
dc.contributor.authorRettinger, M.
dc.contributor.authorRobinson, J.
dc.contributor.authorSchneider, M.
dc.contributor.authorSherlock, V.
dc.contributor.authorSussmann, R.
dc.contributor.authorTe, Y.
dc.contributor.authorWarneke, T.
dc.contributor.authorWeinzierl, C.
dc.date2013
dc.date.accessioned2016-03-25T11:11:10Z
dc.date.available2016-03-25T11:11:10Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/2913
dc.descriptionThe TCCON (Total Carbon Column Observing Network) FTIR (Fourier transform infrared) network provides highly accurate observations of greenhouse gas column-averaged dry-air mole fractions. As an important component of TCCON quality assurance, sealed cells filled with approximately 5 mbar of HCl are used for instrumental line shape (ILS) monitoring at all TCCON sites. Here, we introduce a calibration procedure for the HCl cells which employs a refillable, pressure-monitored reference cell filled with C2H2. Using this method, we identify variations of HCl purity between the TCCON cells as a non-negligible disturbance. The new calibration procedure introduced here assigns effective pressure values to each individual cell to account for additional broadening of the HCl lines. This approach will improve the consistency of the network by significantly reducing possible station-to-station biases due to inconsistent ILS results from different HCl cells. We demonstrate that the proposed method is accurate enough to turn the ILS uncertainty into an error source of secondary importance from the viewpoint of network consistency.
dc.languageeng
dc.titleCalibration of sealed HCl cells used for TCCON instrumental line shape monitoring
dc.typeArticle
dc.subject.frascatiEarth and related Environmental sciences
dc.audienceScientific
dc.subject.freecalibration
dc.subject.freeerror analysis
dc.subject.freeFTIR spectroscopy
dc.subject.freegreenhouse gas
dc.subject.freemonitoring
dc.subject.freenetwork analysis
dc.subject.freequality control
dc.source.titleAtmospheric Measurement Techniques
dc.source.volume6
dc.source.issue12
dc.source.page3527-3537
Orfeo.peerreviewedYes
dc.identifier.doi10.5194/amt-6-3527-2013
dc.identifier.scopus2-s2.0-84890483029


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