the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
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. Renard
F. Dulac
G. Berthet
T. Lurton
D. Vignelle
T. Tonnelier
C. Thaury
M. Jeannot
B. Couté
R. Akiki
J.-L. Mineau
N. Verdier
M. Mallet
F. Gensdarmes
P. Charpentier
S. Mesmin
V. Duverger
J.-C. Dupont
T. Elias
V. Crenn
J. Sciare
J. Giacomoni
M. Gobbi
E. Hamonou
H. Olafsson
P. Dagsson-Waldhauserova
C. Camy-Peyret
C. Mazel
T. Décamps
M. Piringer
J. Surcin
D. Daugeron
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.
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J.-B. Renard et al.


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RC C142: 'Drifting balloon and pump', Anonymous Referee #1, 19 Feb 2015
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RC C174: 'Interactive comment on “LOAC: a small aerosol optical counter/sizer for ground-based and balloon measurements of the size distribution and nature of atmospheric particles 2. First results from balloon and unmanned aerial vehicle flights”', Anonymous Referee #2, 23 Feb 2015
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AC C386: 'Answers to Reviewer 1 and', Jean-Baptiste Renard, 24 Mar 2015


-
RC C142: 'Drifting balloon and pump', Anonymous Referee #1, 19 Feb 2015
-
RC C174: 'Interactive comment on “LOAC: a small aerosol optical counter/sizer for ground-based and balloon measurements of the size distribution and nature of atmospheric particles 2. First results from balloon and unmanned aerial vehicle flights”', Anonymous Referee #2, 23 Feb 2015
-
AC C386: 'Answers to Reviewer 1 and', Jean-Baptiste Renard, 24 Mar 2015
J.-B. Renard et al.
J.-B. Renard et al.
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- Unmanned Aerial Systems for Monitoring Trace Tropospheric Gases T. Schuyler & M. Guzman 10.3390/atmos8100206
- Preliminary research for low-cost particulate matter sensor network C. Báthory et al. 10.1051/e3sconf/201910000004
- Enhanced extinction of visible radiation due to hydrated aerosols in mist and fog T. Elias et al. 10.5194/acp-15-6605-2015
- Evidence of a corona discharge induced by natural high voltage due to vertical potential gradient D. Hong et al. 10.1088/2516-1067/ab0563