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Discussion papers
https://doi.org/10.5194/amtd-8-1261-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/amtd-8-1261-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Submitted as: research article 29 Jan 2015

Submitted as: research article | 29 Jan 2015

Review status
This discussion paper is a preprint. It has been under review for the journal Atmospheric Measurement Techniques (AMT). The revised manuscript was not accepted.

LOAC: a small aerosol optical counter/sizer for ground-based and balloon measurements of the size distribution and nature of atmospheric particles – Part 2: First results from balloon and unmanned aerial vehicle flights

J.-B. Renard1, F. Dulac2, G. Berthet1, T. Lurton1, D. Vignelle1, F. Jégou1, T. Tonnelier3, C. Thaury3, M. Jeannot1,4, B. Couté1, R. Akiki3, J.-L. Mineau3, N. Verdier5, M. Mallet6, F. Gensdarmes7, P. Charpentier8, S. Mesmin8, V. Duverger1, J.-C. Dupont9, T. Elias10, V. Crenn2, J. Sciare2, J. Giacomoni4, M. Gobbi4, E. Hamonou2, H. Olafsson11, P. Dagsson-Waldhauserova11,12, C. Camy-Peyret13, C. Mazel14, T. Décamps14, M. Piringer15, J. Surcin1, and D. Daugeron16 J.-B. Renard et al.
  • 1LPC2E-CNRS/Université d'Orléans, 3A avenue de la recherche scientifique, 45071 Orléans, France
  • 2LSCE-CEA/IPSL, CEA Saclay 701, 91191 Gif-sur-Yvette, France
  • 3Environnement-SA, 111 boulevard Robespierre, BP 4513, 78304, Poissy, France
  • 4Groupe Aerophile, 106 avenue Felix Faure, 75015 Paris, France
  • 5Centre National d'Etudes Spatiales (CNES), DCT/BL/NB, 18 avenue Edouard Belin, 31401 Toulouse CEDEX 9, France
  • 6Laboratoire d'Aérologie/Université Paul Sabatier, 14 avenue Edouard Belin, 31400 Toulouse, France
  • 7Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSN-RES, SCA, Gif-sur-Yvette, 91192, France
  • 8MeteoModem, Rue de Bessonville, 77760 Ury, France
  • 9LMD/IPSL – Ecole Polytechnique, Route de Saclay, 91128 Palaiseau CEDEX, France
  • 10HYGEOS/LMD/IPSL – Ecole Polytechnique – Route de Saclay, 91128 Palaiseau CEDEX, France
  • 11University of Reykjavik, Reykjavik, Iceland
  • 12Agricultural University of Iceland, Keldnaholt, 112 Reykjavik, Iceland
  • 13IPSL (UPMC/UVSQ), 4 place Jussieu, Boîte 101, 75252 Paris CEDEX 05, France
  • 14Fly-n-Sense, 25 rue Marcel Issartier, 33700 Mérignac, France
  • 15Zentralanstalt für Meteorologie und Geodynamik, Vienna, Austria
  • 16Université d'Auvergne/LPC2E, Paul Constans, Rue Christophe Thivrier, BP 415, 03107 Montluçon CEDEX, France

Abstract. In a companion (Part 1) paper (Renard et al., 2015), we have described and evaluated a new versatile optical particle counter/sizer named LOAC (Light Optical Aerosols Counter) based on scattering measurements at angles of 12 and 60°. that allows some speciation of particles (droplets, carbonaceous, salts, and mineral dust) in addition to size segregated counting in a large diameter range from 0.2 up to possibly more than 100 μm depending on sampling conditions. Its capabilities overwhelm those of preceding optical particle counters (OPCs) allowing the characterization of all kind of aerosols from submicronic-sized absorbing carbonaceous particles in polluted air to very coarse particles (> 10–20 μm in diameter) in desert dust plumes or fog and clouds. LOAC light and compact design allows measurements under all kinds of balloons, on-board unmanned aerial vehicles (UAV) and at ground level.

We illustrate here the first LOAC airborne results obtained from an unmanned aerial vehicle (UAV) and a variety of scientific balloons. The UAV was deployed in a peri-urban environment near Bordeaux in France. Balloon operations include (i) tethered balloons deployed in urban environments in Wien (Austria) and Paris (France), (ii) pressurized balloons drifting in the lower troposphere over the western Mediterranean (during the Chemistry-Aerosol Mediterranean Experiment – ChArMEx campaigns), (iii) meteorological sounding balloons launched in the western Mediterranean region (ChArMEx) and from Aire-sur-l'Adour in south-western France (VOLTAIRE-LOAC campaign). More focus is put on measurements performed in the Mediterranean during (ChArMEx) and especially during African dust transport events to illustrate the original capability of balloon-borne LOAC to monitor in situ coarse mineral dust particles. In particular, LOAC has detected unexpected large particles in desert sand plumes.

J.-B. Renard et al.
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J.-B. Renard et al.
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Short summary
We present exemples of measurements obtained by the new light optical aerosol counter LOAC. The measurement were conducted from different kinds of balloons in the troposphre and stratosphere.
We present exemples of measurements obtained by the new light optical aerosol counter LOAC. The...
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