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Volume 11, issue 6 | Copyright

Special issue: Quadrennial Ozone Symposium 2016 – Status and trends...

Atmos. Meas. Tech., 11, 3759-3768, 2018
https://doi.org/10.5194/amt-11-3759-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 27 Jun 2018

Research article | 27 Jun 2018

Wavelength calibration of Brewer spectrophotometer using a tunable pulsed laser and implications to the Brewer ozone retrieval

Alberto Redondas1,2, Saulius Nevas3, Alberto Berjón4,2, Meelis-Mait Sildoja3, Sergio Fabian León-Luis1,2, Virgilio Carreño1,2, and Daniel Santana-Díaz4,2 Alberto Redondas et al.
  • 1Agencia Estatal de Meteorología, Izaña Atmospheric Research Center, Tenerife, Spain
  • 2Regional Brewer Calibration Center for Europe, Izaña Atmospheric Research Center, Tenerife, Spain
  • 3Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany
  • 4University of La Laguna, Department of Industrial Engineering, S.C. de Tenerife, Spain

Abstract. In this contribution we present the wavelength calibration of the travelling reference Brewer spectrometer of the Regional Brewer Calibration Center for Europe (RBCC-E) at PTB in Braunschweig, Germany. The wavelength calibration is needed for the calculation of the ozone absorption coefficients used by the Brewer ozone algorithm. In order to validate the standard procedure for determining Brewer's wavelength scale, a calibration has been performed by using a tunable laser source at PTB in the framework of the EMRP project ENV59 ATMOZ Traceability for the total column ozone. Here we compare these results to those of the standard procedure for the wavelength calibration of the Brewer instrument. Such a comparison allows validating the standard methodology used for measuring the ozone absorption coefficient with respect to several assumptions. The results of the laser-based calibrations reproduces those obtained by the standard operational methodology and shows that there is an underestimation of 0.8% of the ozone absorption coefficients due to the use of the parametrized slit functions.

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We present the wavelength calibration of the travelling reference Brewer spectrometer of the Regional Brewer Calibration Center for Europe at PTB in Braunschweig. We compare these results to those of the standard procedure for the wavelength calibration of the Brewer. The results of the laser-based calibrations reproduce those obtained by the standard operational methodology and show that there is a underestimation of 0.8 %, due the use of the parametrized slit functions.
We present the wavelength calibration of the travelling reference Brewer spectrometer of the...
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