10:45am - 11:00amFR1-4: 1
Seasonal Cycles and Sources of Water-Soluble Organic Carbon and Nitrogen in Size Segregated Aerosols in Bolu (Türkiye)
Konstantina Alevraki1, Maria Tsagkaraki1, Emre Dikmen2, Eda Sağırlı2, Aşkın Birgül3, Perihan Binnur Kurt Karakuş3, Konstantina Oikonomou4, Jean Sciare4, Nikolaos Mihalopoulos5, Fatma Öztürk6
1Department of Chemistry, University of Crete; 2Department of Environmental Engineering, Bolu Abant İzzet Baysal University; 3Department of Environmental Engineering, Bursa Technical University; 4Climate and Atmosphere Research Center (CARE-C), The Cyprus Institute; 5Institute for Environmental Research and Sustainable Development, National Observatory of Athens; 6Institute of Environmental Sciences, Boğaziçi University
Although water-soluble OC (WSOC) and ON (WSON) constitute a substantial fraction of aerosols, particularly in urban areas affected by agricultural, biogenic, and biomass burning emissions, there remains a paucity of information regarding the size-segregated levels, sources, and seasonality of these parameters. The primary objective of this study is to determine the levels, seasonality, and sources of WSOC and WSON in size-segregated aerosol samples collected at a ground-based station (40.73° N, 31.60º E, 743 m asl) in Bolu (Türkiye) between April 2021 and April 2022.
11:00am - 11:15amFR1-4: 2
Smoke on the water at Ioannina, Greece: emissions and processing of wood burning products on aerosols
Kalliopi Petrinoli1, Iasonas Stavroulas1, Maximilien Desservettaz2, Eleni Liakakou1, Georgios Grivas1, Nikolaos Hatzianastassiou3, Efstratios Bourtsoukidis2, Aikaterini Bougiatioti1, Nikolaos Mihalopoulos1
1Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Greece; 2Climate and Atmosphere Research Centre, The Cyprus Ιnstitute, 2121 Nicosia, Cyprus; 3Laboratory of Meteorology, Department of Physics, University of Ioannina, 45110 Ioannina, Greece
This study examines the chemical composition and sources of aerosols during severe winter pollution episodes in Ioannina, Greece. Using data from an ACSM, a PTR-MS and an aethalometer, biomass burning was identified as the dominant pollution source, significantly contributing to organic aerosols (OA) and brown carbon absorption. Combined aerosol acidity and liquid water content lead to enhanced secondary aerosol formation through aqueous phase processing. Concurrently, PMF showed that 58% of OA originates from biomass burning. Not least, Ioannina’s basin location and temperature inversions lead to pollutant accumulation, highlighting the urgent need for targeted air quality policies in southeastern European cities.
11:15am - 11:30amFR1-4: 3
Optical and chemical properties of smoke aerosols from peri-urban wildfires in Athens
Dimitris G. Kaskaoutis1, Kalliopi Petrinoli2, Georgios Grivas2, Panayiotis Kalkavouras2, Maria Tsagkaraki3, Kalliopi Tavernaraki3, Kyriaki Papoutsidaki3, Iasonas Stavroulas2, Despina Paraskevopoulou2, Aikaterini Bougiatioti2, Eleni Liakakou2, Rafaella-Eleni P. Sotiropoulou4, Efthimios Tagaris1, Evangelos Gerasopoulos2, Nikolaos Mihalopoulos2
1Department of Chemical Engineering, University of Western Macedonia; 2Institute for Environmental Research and Sustainable Development, National Observatory of Athens; 3ECPL, Department of Chemistry, University of Crete; 4Department of Mechanical Engineering, University of Western Macedonia
This work focuses on wildfire events, in the climate sensitive area of the Eastern Mediterranean and especially in Greece. The analysis focuses on three intense wildfire events that occurred in the proximity of Athens during the first half of August 2021 (August 3–10: Varympompi and Euboea forest fires; August 17–19: Vilia forest fire), following a prolonged and intense heatwave. The study assesses the impact of transported smoke from forest fires on urban air quality and aerosol optical, physical and chemical properties.
11:30am - 11:45amFR1-4: 4
Secondary organic aerosol speciation observed in urban and forested sites of the Paris region during the summer 2022
Diana L. Pereira1, Aline Gratien1, Chiara Giorio2, Alexander Zherebker2, Emmanuelle Mebold3, Thomas Bertin4, Cecile Gaimoz4, Gael Noyalet1, Servanne Chevaillier1, Christopher Cantrell4, Vincent Michoud1, Claudia Di Biagio1, Manuela Cirtog4, Benedicte Picquet-Varrault4, Mathieu Cazaunau4, Antonin Berge1, Edouard Pangui4, Jean-François Doussin4, Paola Formenti1
1LISA, Université Paris Cité and Univ Paris Est Creteil, Paris, 75013, France; 2Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, United Kingdom; 3Observatoire des Sciences de l’Univers OSU-EFLUVE, Univ Paris Est Creteil, Créteil, 94010, France; 4LISA, Univ Paris Est Creteil and Université Paris Cité, Créteil, 94010, France
This work combines chamber experiments and field measurements to determine the contribution of different secondary organic aerosol precursors into the organic carbon observed at urban and forested areas of Paris. Organic carbon measurements and molecular scale analyses using HRMS, LC-MS and GC-MS highlight the contribution of anthropogenic sources into the aerosol composition, which predominates for both environments.
11:45am - 12:00pmFR1-4: 5
Real-time Molecular Emissions from a Modern Domestic Stove: The Role of Malfunctions and Operating Conditions
Dogushan Kilic1,2, James D. Allan1,2, Leonard Kirago4, Zixuan Chen1, Daniel Wilson3, Marvin Shaw2,4, Daniel Bryant4, Rhianna Evans4, Michael Flynn1, James Hopkins2,4, Amanda Lea-Langton3, Andrew Rickard2,4, Gordon McFiggans1, Jacqueline Hamilton2,4, Hugh Coe1
1Department of Earth and Environmental Sciences, University of Manchester; 2National Centre for Atmospheric Science; 3Department of Mechanical, Aerospace and Civil Engineering, University of Manchester; 4Wolfson Atmospheric Chemistry Laboratory, University of York
Domestic wood burning is a major source of particulate matter (PM) emissions in the UK, exceeding road traffic emissions. Despite mitigation efforts like 'EcoDesign' stoves, emissions have risen over two decades. UK estimates rely on lab tests that may not reflect real-world conditions, especially during transient phases like ignition and reloading. A new test facility at the University of Manchester used real-time analysers, including EESI mass spectrometry, to monitor emissions under varied conditions. Findings reveal significant chemical variations across burn phases, with oxidised gases peaking early and nitrogen-containing aerosols increasing during smouldering, highlighting the impact of combustion conditions
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