A Drone-Based Bioaerosol Sampling System to Monitor Ice Nucleation Particles in the Lower Atmosphere

dc.contributor.authorBieber, Paulen
dc.contributor.authorSeifried, Teresa M.en
dc.contributor.authorBurkart, Juliaen
dc.contributor.authorGratzl, Jürgenen
dc.contributor.authorKasper-Giebl, Anneen
dc.contributor.authorSchmale, David G. IIIen
dc.contributor.authorGrothe, Hinrichen
dc.contributor.departmentSchool of Plant and Environmental Sciencesen
dc.date.accessioned2020-03-02T13:27:39Zen
dc.date.available2020-03-02T13:27:39Zen
dc.date.issued2020-02-07en
dc.date.updated2020-03-02T12:40:39Zen
dc.description.abstractTerrestrial ecosystems can influence atmospheric processes by contributing a huge variety of biological aerosols (bioaerosols) to the environment. Several types of biological particles, such as pollen grains, fungal spores, and bacteria cells, trigger freezing processes in super-cooled cloud droplets, and as such can contribute to the hydrological cycle. Even though biogenic particles are known as the most active form of ice nucleation particles (INPs), the transport to high tropospheric altitudes, as well as the occurrence in clouds, remains understudied. Thus, transport processes from the land surface into the atmosphere need to be investigated to estimate weather phenomena and climate trends. To help fill this knowledge gap, we developed a drone-based aerosol particles sampling impinger/impactor (DAPSI) system for field studies to investigate sources and near surface transport of biological INPs. DAPSI was designed to attach to commercial rotary-wing drones to collect biological particles within about 100 m of the Earth&rsquo;s surface. DAPSI provides information on particulate matter concentrations (PM<sub>10</sub> &amp; PM<sub>2.5</sub>), temperature, relative humidity, and air pressure at about 0.5 Hz, by controlling electrical sensors with an onboard computer (Raspberry Pi 3). Two remote-operated sampling systems (impinging and impacting) were integrated into DAPSI. Laboratory tests of the impinging system showed a 96% sampling efficiency for standardized aerosol particles (2 &micro;m polystyrene latex spheres) and 84% for an aerosol containing biological INPs (<i>Betula pendula)</i>. A series of sampling missions (12 flights) were performed using two Phantom 4 quadcopters with DAPSI onboard at a remote sampling site near Gosau, Austria. Fluorescence microscopy of impactor foils showed a significant number of auto-fluorescent particles &lt; 0.5 &micro;m at an excitation of 465&ndash;495 nm and an emission of 515&ndash;555 nm. A slight increase in ice nucleation activity (onset temperature between &minus;27 &deg;C and &minus;31 &deg;C) of sampled aerosol was measured by applying freezing experiments with a microscopic cooling technique. There are a number of unique opportunities for DAPSI to be used to study the transport of bioaerosols, particularly for investigations of biological INP emissions from natural sources such as birch or pine forests.en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationBieber, P.; Seifried, T.M.; Burkart, J.; Gratzl, J.; Kasper-Giebl, A.; Schmale, D.G., III; Grothe, H. A Drone-Based Bioaerosol Sampling System to Monitor Ice Nucleation Particles in the Lower Atmosphere. Remote Sens. 2020, 12, 552.en
dc.identifier.doihttps://doi.org/10.3390/rs12030552en
dc.identifier.urihttp://hdl.handle.net/10919/97097en
dc.language.isoenen
dc.publisherMDPIen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectbioaerosolen
dc.subjectimpingeren
dc.subjectimpactoren
dc.subjectfluorescenceen
dc.subjectice nucleationen
dc.subjectINPsen
dc.subjectsUASen
dc.subjecthydrological cycleen
dc.titleA Drone-Based Bioaerosol Sampling System to Monitor Ice Nucleation Particles in the Lower Atmosphereen
dc.title.serialRemote Sensingen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
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