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Volume 18, issue 13
Atmos. Chem. Phys., 18, 9441-9455, 2018
https://doi.org/10.5194/acp-18-9441-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

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

Atmos. Chem. Phys., 18, 9441-9455, 2018
https://doi.org/10.5194/acp-18-9441-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 06 Jul 2018

Research article | 06 Jul 2018

EUBREWNET RBCC-E Huelva 2015 Ozone Brewer Intercomparison

Alberto Redondas1,2, Virgilio Carreño1,2, Sergio F. León-Luis1,3, Bentorey Hernández-Cruz2,3, Javier López-Solano1,2,3, Juan J. Rodriguez-Franco1,3, José M. Vilaplana4, Julian Gröbner5, John Rimmer6, Alkiviadis F. Bais7, Vladimir Savastiouk8, Juan R. Moreta9, Lamine Boulkelia10, Nis Jepsen11, Keith M. Wilson12, Vadim Shirotov13, and Tomi Karppinen14 Alberto Redondas et al.
  • 1Izaña Atmospheric Research Center, Agencia Estatal de Meteorología, Tenerife, Spain
  • 2Departamento de Ingeniería Industrial, Universidad de La Laguna, Tenerife, Spain
  • 3Regional Brewer Calibration Center for Europe, Izaña Atmospheric Research Center, Tenerife, Spain
  • 4National Institute for Aerospace Technology – INTA, Atmospheric Observatory “El Arenosillo”, Huelva, Spain
  • 5Physikalisch-Meteorologisches Observatorium Davos/World Radiation Center, Davos, Switzerland
  • 6Centre for Atmospheric Sciences, School of Earth and Environmental Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, UK
  • 7Laboratory of Atmospheric Physics, Aristotle University of Thessaloniki, Thessaloniki, Greece
  • 8International Ozone Services, Toronto, Canada
  • 9Agencia Estatal de Meteorología, Madrid, Spain
  • 10National Meteorological Office, Algeria
  • 11Danish Meteorological Institute, Copenhagen, Denmark
  • 12Kipp & Zonen, Delft, The Netherlands
  • 13Scientific and Production Association “Typhoon”, Obninsk, Russia
  • 14Finnish Meteorological Institute, Sodankylä, Finland

Abstract. From 25 May to 5 June 2015, the 10th regional intercomparison campaign of the Regional Brewer Calibration Center – Europe (RBCC-E) was held at El Arenosillo atmospheric sounding station of the Instituto Nacional de Técnica Aeroespacial (INTA). This campaign was jointly conducted by COST Action ES1207 EUBREWNET and the Area of Instrumentation and Atmospheric Research of INTA. A total of 21 Brewers, 11 single- and 10 double-monochromator instruments from 11 countries participated and were calibrated for total column ozone (TOC) and solar UV irradiance. In this 2015 campaign we have introduced a formal approach to the characterisation of the internal instrumental stray light, the filter non-linearity and the algorithm for correcting for its effects on the TOC calculations. This work shows a general overview of the ozone comparison and the evaluation of the correction of the spectral stray light effect for the single-monochromator Brewer spectrophotometer, derived from the comparison with a reference double-monochromator Brewer instrument. At the beginning of the campaign, 16 out of the 21 participating Brewer instruments agreed within better than ±1%, and 10 instruments agreed within better than ±0.5% considering data with ozone slant column between 100 and 900DU, which does not require instrumental stray light correction.

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This work shows an overview of the total ozone comparison of the Brewer instrument during the 10th RBCC-E campaign in a joint effort with the EUBREWNET COST 1207 action. The status of the network after 2 years of calibration shows 16 out of the 21 participating Brewer instruments (76 %) agreed within better than ±1 %, and 10 instruments (50 %) agreed within better than ±0.5 %. After applying the final calibration and the stray light correction all working instruments agreed at the ±0.5 % level.
This work shows an overview of the total ozone comparison of the Brewer instrument during the...
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