10:15am - 10:30amTH1-2: 1
Investigating the Impact of Wildfire Emissions on Air Quality Through Multi-annual Observations
Joel F. de Brito, Elise Moreau, Anna Font
Centre for Energy and Environment, IMT Nord Europe, Institut Mines-Télécom, Université de Lille, Lille, 59000, France
Wildfires significantly impact air quality and climate, with increasing frequency and intensity expected in the coming years. Currently, wildfire-related emissions contribute 7–10% of near-surface PM2.5 in French background regions during summertime. This study investigates biomass burning (BB) aerosols at the ATOLL, northern France, site using in-situ and remote sensing techniques. The INTERPLAY method, previously applied to winter heating emissions, is adapted to assess BrC aging from wildfires. Case studies from 2017, 2019, and 2022 highlight transboundary transport. Findings enhance source attribution methods and improve BrC quantification, informing air quality assessments and climate models through integrated ground-based and satellite observations.
10:30am - 10:45amTH1-2: 2
Toxicity of Transport Emissions: Findings from the PAREMPI Light-Duty Campaign
Tereza Cervena1, Michal Vojtisek-Lom1, Martin Pechout1, Katerina Honkova1, Tana Zavodna1, Jan Topinka1, Päivi Aakko-Saksa2, Anssi Järvinen2, Matti Rissanen3, Lassi Markkula3, Laura Salo3, Katariina Kylämäki3, Henna Lintusaari3, Topi Rönkkö3, Luis Barreira4, Li Delun4, Sanna Saarikoski4, Wojciech Honkisz5, Piotr Bielaczyc5, Pontus Roldin6, Ismael Ortega7
1Institute of Experimental Medicine, Prague, Czech Republic; 2VTT Technical Research Centre of Finland, Finland; 3Tampere University, Tampere, Finland; 4Finnish Meteorological Institute, Helsinki, Finland; 5BOSMAL, Bielsko Biala, Poland; 6Lund University, Lund, Sweden.; 7ONERA, Palaiseau, France
Transport emissions contribute to airborne particulate matter (PM) and impact health through primary and secondary aerosol (SecA) formation. The PAREMPI project assesses the toxicological effects of emissions using an air-liquid interface (ALI) in-vitro model. In the Light-Duty (LD) campaign, five vehicles were tested under real driving emissions (RDE) conditions at +23°C and -9°C. Toxicity assessments revealed higher cytotoxicity (V1, V3, V4), oxidative stress (V3, V5, V4), and DNA damage (V3, V4, V6), with cold-start conditions upregulating antiviral defense genes. These findings highlight the need for emission regulations reflecting real-world toxicity risks.
10:45am - 11:00amTH1-2: 3
The ubiquity of Ultrafine particles and Aircraft Lubrication Oil compounds near Zürich Airport
Sarah Tinorua1, Benjamin T. Brem1, Zachary C. J. Decker1,2, Jay G. Slowik1, Peter A. Alpert1, Markus Ammann1, André S. H. Prévôt1, Michael Bauer1, Suneeti Mishra1, Michael Götsch3, Joerg Sintermann3, Martin Gysel-Beer1
1PSI Center for Energy and Environmental Sciences, 5232 Villigen PSI, Switzerland; 2now at NOAA CSL & Cooperative Institute for Research in Environmental Sciences (CIRES), Boulder, CO, USA; 3AWEL, Amt für Abfall, Wasser, Energie und Luft, 8090 Zürich, Switzerland
Aircraft particle emissions at the engine exit are largely composed of Ultra Fine Particles (UFPs, D <100 nm) which can cause adverse health effects. In November 2022, we deployed a state-of-the-art set of gas- and aerosol-phase instrumentation 1 km near Zürich airport to characterize aircraft UFPs. Measurements showed that airport activities bring high UFPs number concentrations to the site with a small mean diameter (around 17.5 nm), that can significantly grow by condensation/coagulation. An increase of the UFPs concentration with lubrication oil markers signal has been found, highlighting that their online detection can predict high UFPs concentrations from the airport.
11:00am - 11:15amTH1-2: 4
Reducing the exposure to soot and carcinogenic polycyclic aromatic hydrocarbon emissions from jet fuel combustion by pentanol blending
Constantinos Moularas1, Una Trivanovic2,3, Irini Tsiodra4, Kalliopi Tavernaraki4, Nikos Mihalopoulos4,5, Georgios A. Kelesidis1
1Faculty of Aerospace Engineering, Delft University of Technology, Delft, 2629 HS, The Netherlands; 2Institute of Energy & Process Engineering, Department of Mechanical and Process Engineering, ETH Zürich, Zurich, 8092, Switzerland; 3Federal Institute of Metrology METAS, Bern-Wabern, 3003, Switzerland; 4Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Athens, 15236, Greece; 5Department of Chemistry, University of Crete, Heraklion, 71003, Greece
Here, soot is produced by enclosed spray combustion of jet fuel blending with pentanol. The concentration, morphology and chemical composition of the generated soot are characterized using real-time and time-integrated sampling instrumentation. Most importantly, increasing the pentanol content in the jet fuel decreases the genotoxic potential of soot and carcinogenic polyaromatic hydrocarbons (PAHs) up to 87 % and the surface area of the deposited soot, an important metric that determines its cytoxocity, by 36 %. Thus, optimization of the pentanol content in jet fuel could eliminate the public health impact of soot and PAH emissions from aircraft engines.
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