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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
06 Nov 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).
Aerosol optical depth in the European Brewer Network
Javier López-Solano1,2,3, Alberto Redondas1,3, Thomas Carlund4, Juan J. Rodriguez-Franco1,3, Henri Diémoz5, Sergio F. León-Luis1,3, Bentorey Hernández-Cruz2,3, Carmen Guirado-Fuentes6,1, Natalia Kouremeti4, Julian Gröbner4, Stelios Kazadzis4, Virgilio Carreño1,3, Alberto Berjón2,3, Daniel Santana-Díaz2,3, Manuel Rodríguez-Valido2,3, Veerle De Bock7, Juan R. Moreta8, John Rimmer9, Lamine Boulkelia10, Nis Jepsen11, Paul Eriksen11, Alkisviadis F. Bais12, Vadim Shirotov13, José M. Vilaplana14, Keith M. Wilson15, and Tomi Karppinen16 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
4Physikalisch-Meteorologisches Observatorium Davos/World Radiation Center, Davos, Switzerland
5Regional Agency for Environmental Protection of the Aosta Valley (ARPA), Saint-Christophe, Italy
6Atmospheric Optics Group, University of Valladolid, Valladolid, Spain
7Royal Meteorological Institute of Belgium, Brussels, Belgium
8Agencia Estatal de Meteorología, Madrid, Spain
9Manchester University, Manchester, United Kingdom
10National Meteorological Office, Algeria
11Danish Meteorological Institute, Copenhagen, Denmark
12Laboratory of Atmospheric Physics, Aristotle University of Thessaloniki, Thessaloniki, Greece
13Scientific and Production Association “Typhoon”, Obninsk, Russia
14National Institute for Aerospace Technology - INTA, Atmospheric Observatory “El Arenosillo”, Huelva, Spain
15Kipp & Zonen, Delft, The Netherlands
16Finnish Meteorological Institute, Sodankyla, Finland
Abstract. The high spatial and temporal variability of aerosols make networks capable of measuring their properties in near real time of high scientific interest. In this work we present and discuss results of an aerosol optical depth algorithm to be used in the European Brewer Network, which provides data in near real time of more than 30 spectrophotometers located from Tamanrasset (Algeria) to Kangerlussuaq (Greenland). Using data from the Brewer Intercomparison Campaigns in the years 2013 and 2015, and the period in between, plus comparisons with Cimel sunphotometers and UVPFR instruments, we check the precision, stability, and uncertainty of the Brewer AOD in the ultraviolet range from 300 to 320 nm. Our results show a precision better than 0.01, an uncertainty of less than 0.05, and a stability similar to that of the ozone measurements for well-maintained instruments. We also discuss future improvements to our algorithm with respect to the input data, their processing, and the characterization of the Brewer instruments for the measurement of aerosols.

Citation: López-Solano, J., Redondas, A., Carlund, T., Rodriguez-Franco, J. J., Diémoz, H., León-Luis, S. F., Hernández-Cruz, B., Guirado-Fuentes, C., Kouremeti, N., Gröbner, J., Kazadzis, S., Carreño, V., Berjón, A., Santana-Díaz, D., Rodríguez-Valido, M., De Bock, V., Moreta, J. R., Rimmer, J., Boulkelia, L., Jepsen, N., Eriksen, P., Bais, A. F., Shirotov, V., Vilaplana, J. M., Wilson, K. M., and Karppinen, T.: Aerosol optical depth in the European Brewer Network, Atmos. Chem. Phys. Discuss.,, in review, 2017.
Javier López-Solano et al.
Javier López-Solano et al.
Javier López-Solano et al.


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Short summary
Aerosols play a crucial role in the Earth-Atmosphere system. The Brewer Ozone Spectrophotometer has been the instrument of choice for ground station measurements of ozone. In an effort to improve the quality of its data, COST Action ES1207 was initiated to form a European Brewer Network – EUBREWNET. The network currently provides near-real-time ozone and UV data across Europe, and in this work, we show that it can also provide data on aerosols using a new aerosol optical depth algorithm.
Aerosols play a crucial role in the Earth-Atmosphere system. The Brewer Ozone Spectrophotometer...