Jérémy Surcin's research while affiliated with French National Centre for Scientific Research and other places

Publications (8)

Article
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The ambient air pollution by particulate matter (PM) has strong negative effects on human health. Recent studies have found correlations between pollution and mortality due to Covid-19. We present here an analysis of such correlation for 32 locations in 6 countries of the Western Europe (France, Germany, Italy, Netherlands, Spain, United Kingdom),...
Article
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Pollen grains strongly affect human health by inducing allergies. Although the monitoring of airborne pollens particles is of major importance, the current measurement methods are manually conducted and are expensive, limiting the number of monitoring stations. Thus, there is a need for relatively low-cost instruments that can work automatically. T...
Article
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In the companion (Part I) paper, we have described and evaluated a new versatile optical particle counter/sizer named LOAC (Light Optical Aerosol Counter), based on scattering measurements at angles of 12 and 60°. That allows for some typology identification of particles (droplets, carbonaceous, salts, and mineral dust) in addition to size-segregat...
Article
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The study of aerosols in the troposphere and in the stratosphere is of major importance both for climate and air quality studies. Among the numerous instruments available, optical aerosol particles counters (OPCs) provide the size distribution in diameter range from about 100 nm to a few tens of µm. Most of them are very sensitive to the nature of...
Article
Full-text available
The study of aerosols in the troposphere and in the stratosphere is of major importance both for climate and air quality studies. Among the numerous instruments available, aerosol particles counters provide the size distribution in diameter range from few hundreds of nm to few tens of μm. Most of them are very sensitive to the nature of aerosols, a...
Article
Full-text available
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 segre...

Citations

... Finally, all intensity scattering measurements were divided by measurements obtained in the 15-20 • scattering angle range, to make a direct comparison of the amplitude of the curves possible without considering the size of the particles [24]. This procedure was also motivated by the fact that the scattered intensity at small scattering angles for irregular grains is almost independent of the shape and the refractive index of the particles and is only dependent on their size [19,25]. ...
... Similar to aircraft measurements, this suite of observations also has the ability to provide in-situ vertical sampling and, to some extent, horizontal sampling of a limited domain, though they are generally limited to sampling the meteorology and dust events that overpass a field site location, rather than being able to target specific events and sample larger areas, as is possible with research aircraft. Renard et al. (2016aRenard et al. ( , 2016bRenard et al. ( , 2018 describe the light optical aerosol counter (LOAC), measuring sizeresolved dust concentrations between 0.2 to 100 μm with an optical particle counter (OPC). The LOAC was c d mounted on either radiosondes or drifting balloons during the Chemistry-Aerosol Mediterranean Experiment (ChArMEx) campaign over the Mediterranean Sea during the summer of 2013, sampling the passage of Saharan dust events. ...
... In situ measurements of volcanic aerosol size distributions with LOAC. The Light Optical Aerosol Counter (LOAC) is a multi-angle in situ optical particle 36 which, thanks to its very limited weight (~300 g), has been operated on small balloon measurement flights at the Observatoire de l'atmosphère du Maïdo at La Réunion island (21.1 S, 55.3E), after the HT eruption. Using a laser at 650 nm wavelength, aerosol concentration is derived with LOAC for particles between 150 nm and 30 μm, in 19 size classes. ...
... [46] CRI sensitivity can be addressed by optimizing the design to measure scattered light at multiple angles simultaneously or by employing dual-wavelength techniques. [47,48] However, these solutions are complex and involve expensive components that are not suitable for compact, low-cost devices. [31] Environmental conditions were reported to affect sensor output, e.g., a non-linear response has been reported with increasing RH. ...
... In this sense, a paradigm shift is currently underway in terms of how air quality is monitored: the new trend is public, widely accessible, real-time air quality data (Castell et al., 2017). Despite many studies, there are still unanswered questions regarding the accuracy, reliability, consistency, and reproducibility of LCS (Wang et al., 2015;Borrego et al., 2016;Clements et al., 2017;Renard et al., 2016aRenard et al., , 2016bNorthcross et al., 2013;Badura et al., 2018); furthermore, environmental impacts on sensor characteristics are not fully understood. For example, humidity is an important parameter in interpreting sensor values in-field since standard methods provide PM concentration values at a constant 50% relative humidity (%RH). ...