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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union

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https://doi.org/10.5194/amt-2017-141
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
27 Jun 2017
Review status
This discussion paper is a preprint. A revision of this manuscript was accepted for the journal Atmospheric Measurement Techniques (AMT) and is expected to appear here in due course.
Experimental techniques for the calibration of lidar depolarization channels in EARLINET
Livio Belegante1, Juan Antonio Bravo-Aranda2,3, Volker Freudenthaler4, Doina Nicolae1, Anca Nemuc1, Lucas Alados-Arboledas2,3, Aldo Amodeo5, Gelsomina Pappalardo5, Giuseppe D'Amico5, Ronny Engelmann6, Holger Baars6, Ulla Wandinger6, Alex Papayannis7, Panos Kokkalis7, and Sérgio N. Pereira8 1National Institute of Research and Development for Optoelectronics, 409 Atomistilor Str, Magurele, Romania
2Andalusian Institute for Earth System Research, Granada, Spain
3Department of Applied Physcis, Unversity of Granada, Granada, Spain
4Meteorological Institute, Ludwig-Maximilians-Universitat, Theresienstr. 37, 80333 Munich, Germany
5Istituto di Metodologie per l’Analisi Ambientale CNR-IMAA, C.da S. Loja, Tito Scalo, Potenza 85050, Italy
6Leibniz Institute for Tropospheric Research, Permoserstr. 15, 04318 Leipzig, Germany
7National Technical University of Athens (NTUA), Physics Department, Heroon ytechniou 9, 15780 Zografou, Athens, Greece
8Evora Geophysics Center, Rua Romao Ramalho 59, 7000, Evora, Portugal
Abstract. Particle depolarization ratio retrieved from lidar measurements are commonly used for aerosol typing studies, microphysical inversion, or mass concentration retrievals. The particle depolarization ratio is one of the primary parameters that can differentiate several major aerosol components, but only if the measurements are accurate enough. The uncertainties related to the retrieval of particle depolarization ratios are the main factor in determining the accuracy of the derived parameters in such studies. This paper presents different depolarization calibration procedures used to improve the quality of the depolarization data. The results illustrate a significant improvement of the depolarization lidar products for all the selected lidar stations that had implemented depolarization calibration procedures. The calibrated volume and particle depolarization profiles at 532 nm show values that fall within a range of values that are generally accepted in the literature.

Citation: Belegante, L., Bravo-Aranda, J. A., Freudenthaler, V., Nicolae, D., Nemuc, A., Alados-Arboledas, L., Amodeo, A., Pappalardo, G., D'Amico, G., Engelmann, R., Baars, H., Wandinger, U., Papayannis, A., Kokkalis, P., and Pereira, S. N.: Experimental techniques for the calibration of lidar depolarization channels in EARLINET, Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2017-141, in review, 2017.
Livio Belegante et al.
Livio Belegante et al.

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Short summary
This paper presents different depolarization calibration procedures used to improve the quality of the depolarization data. The results illustrate a significant improvement of the depolarization lidar products for all the selected EARLINET lidar instruments. The calibrated volume and particle depolarization profiles at 532 nm show values that fall within a range of values that are accepted in the literature. The depolarization accuracy estimate at 532nm is better than pm0.03 for all cases.
This paper presents different depolarization calibration procedures used to improve the quality...
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