Principle and application of a fast sensor for atmospheric ozone

Schurath, U.; Speuser, W.; Schmidt, R.

doi:10.1007/bf00322426

Cited by 28 publications

(29 citation statements)

References 5 publications

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“…the sensitivity dependence on the humidity of the sample air. Schurath et al (1991) report a sensitivity increase of ∼11 % per percent relative humidity for similar types of sensor discs. As the sample air delivered by the ozone generator is dry (relative humidity <1 %) and the water-repellence of the sensor disc high (see sensor disc preparation, Sect.…”

Section: Precision As Function Of Measurement Frequencymentioning

confidence: 90%

“…To prevent temperature-driven changes of the sensitivity of the sensor disc of typically 2 % per Kelvin (Schurath et al, 1991), the sensor disc holder is temperature stabilized to ∼38 • C by an integrated temperature controller. The sensor disc holder can easily be removed by inserting a quick-release knob and turning it by 90 • .…”

Section: Atmosmentioning

confidence: 99%

“…(2) A device manufactured by the company GFAS is based on the instrument described by Schurath et al (1991) and Guesten et al (1992). It uses Coumarin-47 as dye and was sold until the year ∼2000.…”

Section: Introductionmentioning

confidence: 99%

“…It is however not the objective to describe the properties of CI sensors discs, which is e.g. documented by Sahand (1989), Speusser (1989, and Schurath et al (1991).…”

Section: Introductionmentioning

confidence: 99%

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A fast and precise chemiluminescence ozone detector for eddy flux and airborne application

et al. 2012

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Abstract.A commercially available dry chemiluminescence (CI) instrument for fast and precise measurement of ozone (O 3 ) is specified. The sensitivity is ∼9000 counts s −1 per ppbv of ozone. Its precision is entirely determined by the number of photons reaching the detector (being a photomultiplier), i.e. is quantum-noise limited. The relative precision . At typical O 3 mixing ratios between 10 and 100 ppbv (and 1 bar), the precision is 0.3-1.0 % at f = 10 Hz. The maximum measurement frequency is 50 Hz. The mechanical and electronic setup as well as the instrument performance is described. Recommendations on the adequate inlet tube configuration (inlet tube length, sampling flow) and on the way of calibration at stationary ground-based platforms and onboard aircraft are given.

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Section: Precision As Function Of Measurement Frequencymentioning

confidence: 90%

Section: Atmosmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…It is however not the objective to describe the properties of CI sensors discs, which is e.g. documented by Sahand (1989), Speusser (1989, and Schurath et al (1991).…”

Section: Introductionmentioning

confidence: 99%

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A fast and precise chemiluminescence ozone detector for eddy flux and airborne application

et al. 2012

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“…This would be consistent with the reported loss of sensitivity from water vapour where the water vapour could quench the excited specie that is responsible for luminescence. Schurath et al (1991) studied the dye coumarin 47 for chemiluminescence and found a response to ozone which showed great sensitivity when the disc was conditioned with ozonised air. They do not however provide a definitive answer to the question of the sensitizing mechanism.…”

Section: Introductionmentioning

confidence: 99%

Sources of uncertainty in eddy covariance ozone flux measurements made by dry chemiluminescence fast response analysers

et al. 2010

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Abstract. We present a systematic intercomparison study of eddy covariance ozone flux measurements made using two fast response dry chemiluminescence analysers. Ozone deposition was measured over a well characterised managed grassland near Edinburgh, Scotland, during August 2007. A data quality control procedure specific to these analysers is introduced. Absolute ozone fluxes were calculated based on the relative signals of the dry chemiluminescence analysers using three different methods and the results are compared for both analysers. It is shown that the error in the fitted analyser calibration parameters required for the flux calculations provides a substantial source of uncertainty in the fluxes. The choice of the calculation method itself can also constitute an uncertainty in the flux as the calculated fluxes by the three methods do not agree within error at all times. This finding highlights the need for a consistent and rigorous approach for comparable datasets, such as e.g. in flux networks. Ozone fluxes calculated by one of the methods were then used to compare the two analysers in more detail. This systematic analyser comparison reveals half-hourly flux values differing by up to a factor of two at times with the difference in mean hourly flux ranging from 0 to 23% with an error in the mean daily flux of ± 12%. The comparison of analysers shows that the agreement in fluxes is excellent for some days but that there is an underlying uncertainty as a result of variable analyser performance and/or non-linear sensitivity.

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Chemical Methods: Chemiluminscence, Chemical Amplification, Electrochemistry, and Derivation

Weinheimer¹

2006

Analytical Techniques for Atmospheric Measurement

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Principle and application of a fast sensor for atmospheric ozone

Cited by 28 publications

References 5 publications

A fast and precise chemiluminescence ozone detector for eddy flux and airborne application

A fast and precise chemiluminescence ozone detector for eddy flux and airborne application

Sources of uncertainty in eddy covariance ozone flux measurements made by dry chemiluminescence fast response analysers

Chemical Methods: Chemiluminscence, Chemical Amplification, Electrochemistry, and Derivation

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