Journal cover Journal topic
Annales Geophysicae An open-access journal of the European Geosciences Union
Ann. Geophys., 23, 3399-3406, 2005
© Author(s) 2005. This work is distributed under
the Creative Commons Attribution 3.0 License.
21 Dec 2005
Comparative measurements of total ozone amount and aerosol optical depth during a campaign at El Arenosillo, Huelva, Spain
A. de La Casinière1, V. Cachorro2, I. Smolskaia3, J. Lenoble1,4, M. Sorribas5, M. Houët4, O. Massot6, M. Antón7, and J. M. Vilaplana5 1IRSA, Université Joseph Fourier, Grenoble, France
2GOA, Universidad de Valladolid, Valladolid, Spain
3now at: Institute for Meteorology and Climatology, Hannover University, Hannover, Germany
4LOA, Université des Sciences et Technologies de Lille, Lille, France
5ESAt-El Arenosillo-INTA, Huelva, Spain
6CEMBREU, Briançon, France
7Dept. of Physics, University of Extremadura, Badajoz, Spain
Abstract. A one week field campaign took place in September 2002 at El Arenosillo, Spain. The objective was to compare total ozone column (TOC) and aerosol optical depth (AOD) from near ultraviolet to near infrared, measured by several Spanish and French instruments. Three spectroradiometers, Brewer, SPUV02, and LICOR, and a CIMEL photometer, have been used simultaneously and the results are presented for four clear days. TOC values are given by the Brewer instrument, and by SPUV02, using two different methods. The ground instruments compare satisfactorily (within 5 DU) and the values are consistent with TOMS data (within 10 DU).

AOD from the various instruments are compared at seven different wavelengths between 320 nm and 1020 nm: the agreement is very good at 350, 380, and 870 nm; at the four other wavelengths the difference is smaller than 0.03, which can be explained by a relative difference of 4% only between the calibrations of the various instruments. Larger AOD diurnal variations were observed at short wavelengths than in the visible and near infrared; this is most likely due to changes in aerosol size along the day, during the campaign.

Citation: de La Casinière, A., Cachorro, V., Smolskaia, I., Lenoble, J., Sorribas, M., Houët, M., Massot, O., Antón, M., and Vilaplana, J. M.: Comparative measurements of total ozone amount and aerosol optical depth during a campaign at El Arenosillo, Huelva, Spain, Ann. Geophys., 23, 3399-3406,, 2005.

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