10:15am - 10:30amMO1-5: 1
Exploring the particle-phase emissions of biomass burning and their chemical transformations at the outdoor EUPHORE simulation chambers
Mila Ródenas1, Rubén Soler1, Teresa Vera1, Ettore Petralia2, Ilaria D’Elia2, Maurizio Gualtieri3, Antonio Piersanti2, Rossella Bengalli3, Esther Borrás1, Beatriz Domínguez1, Laura Caiazzo2, Tatiana Gómez1, Sara Marchetti3, María L. Martínez1, Giulia Motta3, Milena Stracquadanio2, Teresa M.G. La Torretta2, Giandomenico Pace2, Ezra Wood1,4, Amalia Muñoz1
1EUPHORE Laboratories, Fundación CEAM, Paterna, 46980, Spain; 2ENEA - Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Rome - 00123 and Bologna, 40121, Italy; 3Dept. of Earth and Environmental Sciences, University of Milano-Bicocca, Milano, 20126, Italy; 4Department of Chemistry, Drexel University, Philadelphia, PA, 19104, USA
Biomass burning (BB) emits pollutants affecting air quality, climate, and health, but its aerosol composition and transformation remain unclear. This work presents the set-up and rationale of a campaign conducted at the high-volume EUPHORE simulation chamber. An in-depth characterization of gas and particle-phase emissions and optical properties from domestic stoves burning oak, pine, and pellet-wood in flaming and smoldering phases and oxidized under day and nighttime conditions was done along with human cell exposure to asses toxicological risks. Focusing on aerosol composition characterization (API-ToF-CIMS+FIGAERO), this work aims to improve understanding of BB emissions, supporting air quality models and mitigation strategies.
10:30am - 10:45amMO1-5: 2
Chamber experiments on the evolution of Polycyclic Aromatic Hydrocarbons (PAHs) and oxygenated PAHs (OPAHs) in fresh and aged biomass burning emissions.
Irini Tsiodra1,2,3, Maria P. Georgopoulou3,4, Kalliopi Florou3, Christos Kaltsonoudis3, Constantine Parinos5, Georgios Grivas1, Aikaterini Bougiatioti1, Spyros N. Pandis3,4, Nikolaos Mihalopoulos1,2, Athanasios Nenes3,6
1Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Lofos Koufou, P. Penteli, Athens, 15236, Greece; 2Environmental Chemical Processes Laboratory, Department of Chemistry, University of Crete, Heraklion, 71003, Greece; 3Center for the Study of Air Quality and Climate Change, Institute of Chemical Engineering Sciences, Foundation for Research and Technology Hellas, Patras, GR-26504, Greece; 4Department of Chemical Engineering, University of Patras, Patras, GR-26504, Greece; 5Hellenic Centre for Marine Research, Institute of Oceanography, 190 13 Anavyssos, Attiki, Greece; 6Laboratory of Atmospheric Processes and their Impacts, School of Architecture, Civil & Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, CH-1015, Switzerland
Polycyclic aromatic hydrocarbons (PAHs) and oxygenated derivatives (OPAHs) were measured in the particle phase of pellet and wood stove burning emissions through a series of experiments. PAHs and OPAHs wood-burning emissions were characterized under fresh, daytime-aged (oxidation by OH radicals) and nighttime-aged (oxidation by NO3 radicals) experimental conditions in the chamber. Besides the effects of aging, the PAC levels were studied under different relative humidity (RH) conditions. Furthermore, the toxicity indicator, Benzo(a)pyrene equivalent (BaPeq), was calculated for the different experiments. Finally, the chamber PAC profile was compared to the biomass burning source profile (from PMF analysis) for ambient particle PACs.
10:45am - 11:00amMO1-5: 3
AIDA Arctic transport experiment (part 1): simulation of northward transport and ageing effect on fundamental black carbon properties
Marco Zanatta1,2, Pia Bogert1, Patrick Ginot3, Yiwei Gong1, Gholam Ali Hoshyaripour1, Yaqiong Hu1, Feng Jiang1, Paolo Laj3, Yanxia Li1, Claudia Linke1, Ottmar Möhler1, Harald Saathoff1, Martin Schnaiter1, Nsikanabasi Silas Umo1, Franziska Vogel1, Robert Wagner1
1Institute of Meteorology and Climate Research – Atmospheric Aerosol Research, Karlsruhe Institute of Technology, Karlsruhe, Germany; 2Institute of Atmospheric Science and Climate, National Research Council of Italy, Bologna, Italy; 3University Grenoble Alpes, CNRS, IRD, G-INP, Institut des Géosciences de l’Environnement, Grenoble, France
Black carbon (BC) is a key anthropogenic climate forcer, with its radiative impact depending on its absorption, cloud activation, and ice-nucleating properties. These evolve with atmospheric ageing, which is challenging to parameterize in models, leading to uncertainties in Arctic BC forcing estimates. The ARCTEx project investigated BC ageing timescales under Arctic transport conditions using the AIDA chamber. Results show altitude strongly modulates BC ageing, with rapid transformation at low altitudes but stable fractal-like BC at high altitudes. Seasonal effects influenced optical and cloud activation properties. Findings highlight the need to refine BC ageing in climate models.
11:00am - 11:15amMO1-5: 4
Ozone-Driven Aerosol Precursor Enhancement in Polyaromatic OH Oxidation
Avinash Kumar1, Prasenjit Seal1, Olga Garmash2, Aliisa Ojala1, Shawon Barua1, Siddharth Iyer1, Matti Rissanen1,3
1Aerosol Physics Laboratory, Physics Unit, Faculty of Engineering and Natural Sciences, Tampere University, 33014 Tampere, Finland.; 2Department of Chemistry, University of Copenhagen, DK-2100, Copenhagen, Denmark.; 3Department of Chemistry, University of Helsinki, P.O. Box 55, FI-00014 Helsinki, Finland.
In our study, we found that the oxidation of naphthalene by OH radicals, combined with the presence of ozone, significantly increases the formation of highly oxygenated organic molecules (HOM) contributing to secondary organic aerosol (SOA) formation. Experiments showed that ozone plays a crucial role in the rapid oxidation of polyaromatic hydrocarbons (PAHs) like naphthalene, 1 and 2-naphthols, biphenyl and anthracene affecting SOA formation. These insights help resolve discrepancies in previous molecular-level studies.
|
