Wildfire plume ageing in the Photochemical Large Aerosol Chamber (PHOTO-LAC)

Czech, H.; Popovicheva, O.; Chernov, D.G.; Kozlov, A.; Schneider, E.; Shmargunov, V.P.; Sueur, M.; Rüger, C.P.; Afonso, C.; Uzhegov, V.; Kozlov, V.S.; Panchenko, M.V.; Zimmermann, R.

Авторы: Czech Hendryk, Popovicheva Olga, Chernov Dmitriy G., Kozlov Alexander, Schneider Eric, Shmargunov Vladimir P., Sueur Maxime, Rüger Christopher P., Afonso Carlos, Uzhegov Viktor, Kozlov Valerii S., Panchenko Mikhail V., Zimmermann Ralf
Журнал: ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
Год издания: 2023
DOI: 10.1039/d3em00280b
Аннотация: Plumes from wildfires are transported over large distances from remote to populated areas and threaten sensitive ecosystems.Dense wildfireplumes areprocessed by atmospheric oxidants and complex multiphase chemistry,differing from processes at typical ambient concentrations.For study ingdense biomass burning plume chemistry in the laboratory,we establish a Photochemical Large Aerosol Chamber (PHOTO-LAC) being th eworld's largest aerosol chamber with a volum eof 1800 m3 and provide its figures of merit.While the photolysis rate of NO2(jNO2 )iscomparable to that of otherchambers,the PHOTO-LAC and its associated low surface-to-volumer at iolead to exceptionally low losses of particles to the walls. Photochemical age ingof toluene underhigh-NOx conditions inducess ubstantial formation of secondary organic aerosols(SOAs)and browncarbon(BrC).Several individual nitrophenol iccompoundscouldbe detectedbyhighresolutionmassspectrometry,demonstratingsimilarphotochemistrytoother environmentalchambers.Biomassburningaerosolsaregeneratedfrompinewoodanddebrisunder flamingandsmoulderingcombustionconditionsandsubsequentlyagedunderphotochemicalanddark ageingconditions,thusresemblingday-andnight-timeatmosphericchemistry.Intheunprecedentedlong ageingwithalternatingphotochemicalanddarkageingconditions,thetemporalevolutionofparticulate matteranditschemicalcompositionisshownbyultra-highresolutionmassspectrometry.Duetothe spaciouscavity,thePHOTO-LACmaybeusedforapplicationsrequiringlargeamountsofparticulatematter, suchascomprehensivechemicalaerosolcharacterisationorcellexposuresundersubmersedconditions.
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Wildfire plume ageing in the Photochemical Large Aerosol Chamber (PHOTO-LAC)статья

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