Conference Agenda
Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).
MO4-3: 4
Coating thickness and mass absorption cross-section of black carbon of fresh biomass burning emissions
1University of Nova Gorica, Slovenia; 2Haze instruments d.o.o, 1000 Ljubljana, Slovenia; 3Metrology Research Centre, National Research Council of Canada, Ottawa, ON K1A 0R6, Canada; 4Department of Mechanical Engineering, University of Alberta, Edmonton, Canada; 5Natural Resources Canada—Canadian Forest Service, Northern Forestry Centre, Edmonton, Canada; 6Department of Chemistry, University of Albert, Edmonton, Alberta, Canada; 7Department of Chemistry, University of Toronto, Toronto, Ontario, Canada
In this study we present the results from a laboratory campaign that took place in summer 2024 at the Northern Forestry Center in Edmonton, Canada, where we performed biomass burning experiments to analyze their coathing thickness and mass absorption cross-section properties. To this end, we performed over 40 controlled burns over fuel types characteristic of Canadian wildfires and domestic heating were burned, including, grass, ponderosa pine, peat, mulch and mixtures mulch with peat. To measure their coating thickness we used a CPMA-SP2 tandem configuration, and for measuring the aerosol particles absorption we used a PTTAM-2λ.
Session Details:
WG2: Aerosol optical propertise: from sources to coating
Time: 01/Sept/2025: 3:00pm-4:30pm · Location: Room Caravaggio
| <strong>pdf</strong>: Adobe Acrobat "Portable Document Format"EAC2025_MO4-3-4_562_Yus Díez.pdf |
Cross molecular chemical characterization of primary and aged logwood stove emissions using online mass spectrometry
1INERIS, Parc Technologique Alata, Verneuil en Halatte, 60550, France; 2Aerospec, EPFL, Lausanne, 1015, Switzerland; 3Haze Instruments, Ljubljana, Slovenia; 4University of Nova Gorica, Nova Gorica, Slovenia; 5Aix Marseille Univ., CNRS, LCE, Marseille, France
Residential wood combustion is a significant source of PM2.5 in winter, emitting volatile and semi-volatile organic compounds that form secondary organic aerosols (SOA). Despite their environmental impact, the SOA formation mechanisms, particularly involving nitrate radicals at night, remain underexplored. This study investigates the chemical transformations of the emissions from a modern logwood stove using advanced online mass spectrometry techniques (CHARON-PTR-ToF-MS and EESI-ToF-MS). Experiments, simulating real-life heating conditions, focused on the day- (OH radicals) and nighttime (NO3 radicals) aging of softwood and hardwood combustion. The study provides real-time molecular characterization of primary and aged emissions, offering insights into their chemical composition.
Session Details:
Poster Session Tuesday
Time: 02/Sept/2025: 5:15pm-6:45pm · Location: Studium2000 Building5
| <strong>pdf</strong>: Adobe Acrobat "Portable Document Format"EAC2025_PO2-70_234_Allouche.pdf |
Field intercomparison of absorption measurements at the suburban Demokritos station in Athens
1Institute of Nuclear and Radiological Sciences & Technology, N.C.S.R. Demokritos, 15341 Athens, Greece; 2Center for Atmospheric Research, University of Nova Gorica, Nova Gorica, 5270, Slovenia; 3Haze Instruments d.o.o., Ljubljana, 1000, Slovenia; 4Department of Chemistry and Biology, Federal Institute of Metrology METAS, 3003 Bern, Switzerland; 5Atmospheric Microphysics Department, Leibniz Institute for Tropospheric Research, Leipzig, 04318, Germany; 6PSI Center for Energy and Environmental Sciences, Paul Scherrer Institute, 5232 Villigen, Switzerland; 7Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
Several methods for in-situ aerosol absorption measurement exist, including optical light attenuation, photothermal interferometry, photo-acoustic spectroscopy, and extinction-minus-scattering. The STANBC project aims to establish a measurement framework for both the aerosol light absorption coefficient and its conversion to eBC mass concentration, ensuring measurement traceability, consistency, and comparability across different air quality monitoring networks in Europe. This work focuses on the comparison of different techniques for measuring light absorption and black carbon in the field. The campaign took at the at the National Center for Scientific Research “Demokritos” (DEM) monitoring station in Athens, Greece, from 25/09/2023 to 11/10/2023.
Session Details:
Poster Session Tuesday
Time: 02/Sept/2025: 5:15pm-6:45pm · Location: Studium2000 Building5
| <strong>pdf</strong>: Adobe Acrobat "Portable Document Format"EAC2025_PO2-146_1018_Gini.pdf |
TH1-3: 4
Characterizing the absorption and heating rate of BC and Mineral dust across urban and remote Mediterranean sites
1Center for Atmospheric Science, University of Nova Gorica, Ajdovščina, Slovenia; 2Institute of Environmental Diagnostics and Water Research, IDAEA-CSIC, Barcelona, Spain; 3Aerosol d.o.o., Ljubljana, Slovenia
This study was conducted at three distinct locations in Spain, representing different atmospheric environments: an urban site in Barcelona (77 m a.s.l.), a regional background site in Montseny (720 m a.s.l.), and a continental site in Montsec (1600 m a.s.l.). The primary objective of this research is to characterize the absorption properties and heating rates of black carbon (BC) and mineral dust (MD), with respect to their size distribution.
Session Details:
WG2: Optical properties of different aerosol species
Time: 04/Sept/2025: 10:15am-11:15am · Location: Room Caravaggio
| <strong>pdf</strong>: Adobe Acrobat "Portable Document Format"EAC2025_TH1-3-4_1021_Gautam.pdf |
TH2-3: 1
The roadmap to a European standard for aerosol light absorption
1Physikalisch-Technische Bundesanstalt, Germany; 2Finnish Meteorological Institute, Helsinki, Finland; 3National Physical Laboratory, Teddington, UK; 4National Research Council, Ottawa, Canada; 5Center for Atmospheric Research, University of Nova Gorica, Nova Gorica, Slovenia; 6Haze Instruments d.o.o., Ljubljana, Slovenia; 7National Centre of Scientific Research “Demokritos”, Attiki, Greece; 8Federal Institute of Metrology METAS, Berne-Wabern, Switzerland; 9Institute for Sensors and Electronics, FHNW, Windisch, Switzerland; 10Jozef Stefan Institute, Ljubljana, Slovenia; 11Department of Atmospheric Microphysics, TROPOS, Leipzig, Germany
We present a roadmap for providing standardised BC measurements, which follows a top-down approach, beginning with SI-traceable measurements of the aerosol absorption coefficient (babs) using in-situ reference methods with a target measurement uncertainty of ≤ 10 % (coverage factor k=2). Two measurement workshops have been successfully conducted, providing essential data to achieve the research goals: 1) two primary reference methods for aerosol light absorption have been tested and validated; these include photo-thermal interferometry and extinction-minus-scattering for at least two different wavelengths. 2) MACBC has been determined for different aerosol mixtures including bare BC, coated BC and externally mixed BC.
Session Details:
WG3: Optical aerosol measurement techniques
Time: 04/Sept/2025: 11:30am-12:30pm · Location: Room Caravaggio
| <strong>pdf</strong>: Adobe Acrobat "Portable Document Format"EAC2025_TH2-3-1_873_Saturno.pdf |
Review of the mass absorption cross-section literature for mixed atmospheric black carbon
1Finnish Meteorological Institute, Finland; 2Metrology Research Centre, National Research Council Canada, Ottawa, Canada; 3Laboratory Particles and Aerosols, Federal Institute of Metrology METAS, Bern, 3003, Switzerland; 4University of Applied Sciences and Arts Northwestern Switzerland, CH-5210 Windisch, Switzerland; 5Air Quality and Aerosol Metrology Group, National Physical Laboratory, Teddington, TW11 0LW, UK; 6Atmospheric Microphysics Department, Leibniz Institute for Tropospheric Research, 04318 Leipzig, Germany; 7Center for Atmospheric Research, University of Nova Gorica, Nova Gorica, 5270, Slovenia; 8Haze Instruments d.o.o., Ljubljana, 1000, Slovenia; 9Department of Environmental Sciences, Jozef Stefan Institute, Ljubljana, 1000, Slovenia; 10Institute of Nuclear Technology and Radiation, NCSR Demokritos, Paraskevi, Attiki, 15310, Greece; 11Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany
We compile more than 200 MACBC values from 63 studies and explore the effects of sampling location, study duration, instrumentation (photometers, photoacoustic; mass concentration (CBC) from thermal-optical analysis, or SP2), measurement wavelength, thermal–optical protocol. The data show that photoacoustic measurements of MACBC were consistently higher in remote relative to urban environments, indicating Eabs>1 in remote environments, as expected. This trend was not evident for filter-based measurements, and few other clear trends could be identified in general. Notably, wavelength-dependent trends were not evident. Our results do not support the use of simplistic generalizations or assumptions about MACBC in the atmosphere.
Session Details:
Poster Session Thursday
Time: 04/Sept/2025: 5:15pm-6:45pm · Location: Studium2000 Building5
| <strong>pdf</strong>: Adobe Acrobat "Portable Document Format"EAC2025_PO3-7_1007_Asmi.pdf |
Investigation of coating thickness and black carbon mass absorption cross-section variation during winter campaign in Ljubljana (Slovenia)
1University of Nova Gorica, Slovenia; 2Haze Instruments d.o.o., Slovenia; 3Aerosol d.o.o., Slovenia; 4Finnish Meteorological Institute, Finland
An ambient measurement campaign was conducted in an urban background site in Ljubljana (Slovenia) during winter 2024/2025. The aim was to determine the influence of coating on absorption enhancement of black carbon and to investigate the factors influencing the generation of coating. The coating thickness was measured by selecting particle mass using CPMA and measuring rBC with SP2-XR. Photothermal interferometer PTAAM-2λ was used to measure aerosol absorption. First results show a varying mixture of moderately and highly coated particles.
Session Details:
Poster Session Thursday
Time: 04/Sept/2025: 5:15pm-6:45pm · Location: Studium2000 Building5
| <strong>pdf</strong>: Adobe Acrobat "Portable Document Format"EAC2025_PO3-40_827_Drinovec.pdf |
ML analysis for absorption measurements correction schemes – A test study
1University of Nova Gorica, Slovenia; 2Nextail Labs SL, 28006 Madrid, Spain; 3Haze instruments d.o.o; 4Andalusian Institute for Earth System Research (IISTA-CEAMA), University of Granada, Granada, Spain; 5Institute for Atmospheric and Earth System Research (INAR), Faculty of Science, University of Helsinki, Finland; 6Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Barcelona, Spain
The absorbing properties of aerosols is typically measured using instruments like filter photometers, with the aethalometer AE33 being the most widely deployed. However, FPs are sensitive to scattering, which can lead to measurement errors, especially at high scattering levels. A correction scheme to address this was proposed but requires scattering data, often unavailable in networks. To overcome this, we are testing Machine Learning algorithms using a gradient boosting regressor on a 2023 summer campaign in Granada, yielding accurate compensation results. The model is being expanded to 23 European sites to validate and refine the algorithm and cross-validate with other instruments.
Session Details:
Poster Session Thursday
Time: 04/Sept/2025: 5:15pm-6:45pm · Location: Studium2000 Building5
| <strong>pdf</strong>: Adobe Acrobat "Portable Document Format"EAC2025_PO3-57_958_Yus Díez.pdf |
Determining source specific organic aerosol and black carbon emission rates by coupling source apportionment and atmospheric dynamics
1Center for Atmospheric Research, University of Nova Gorica, SI-5000 Nova Gorica, Slovenia; 2Aerosol d.o.o., SI-1000 Ljubljana, Slovenia; 3Center for Energy and Environmental Sciences, Paul Scherrer Institute, 5232 Villigen, Switzerland
This study focuses on determining emission rates of source-specific black carbon (BC) and organic aerosol (OA) using a combination of source apportionment and atmospheric modeling. Measurements were conducted in Nova Gorica, Slovenia, using an Aerosol Chemical Speciation Monitor (ACSM) and an aethalometer over three months in 2024. A box model approach estimated emission rates by incorporating atmospheric dynamics through planetary boundary layer height inferred from radon measurements. Results showed distinct diurnal patterns for traffic and biomass burning emissions, while secondary OA can be linked to photochemical production and long-range transport.
Session Details:
Poster Session Thursday
Time: 04/Sept/2025: 5:15pm-6:45pm · Location: Studium2000 Building5
| <strong>pdf</strong>: Adobe Acrobat "Portable Document Format"EAC2025_PO3-82_1097_Stavroulas.pdf |
Comparison of Airborne In-Situ and Ground-/Satellite-Based LIDAR-Derived Aerosol Light Extinction Coefficients During the JATAC/CAVA-AW Campaigns in 2021 and 2022
1Center for Atmospheric Research, University of Nova Gorica, Ajdovščina, 5270, Slovenia; 2Haze Instruments d.o.o., Ljubljana, 1000, Slovenia; 3Aerovizija d.o.o., Vojnik, 3212, Slovenia; 4IAASARS, National Observatory of Athens, Penteli, 15236, Greece; 5Meteorological Institute, Ludwig Maximilian University of Munich, Germany; 6Leibniz Institute for Tropospheric Research, Leipzig, Germany; 7Ocean Science Centre Mindelo, Mindelo, CP 2110, Cape Verde; 8GEOMAR Helmholtz Centre for Ocean Research, Kiel, 24148, Germany; 9ESA/ESTEC, Noordwijk, 2201 AZ, Netherlands
Here we compare the optical product of ESA's space-borne ALADIN lidar with the in-situ airborne measurements obtained during the JATAC campaign over Cabo Verde in 2021–2022. In-situ measurements of aerosol optical properties were matched to Aeolus overpasses and extrapolated to 355 nm. Despite the spatial and temporal resolution differences, results of comparison between the in-situ and space-borne aerosol light extinction coefficients show good agreement (regression slope of 0.99, geometric Rg² of 0.54). Additional comparisons of the in-situ aerosol light extinction coefficient with ground-based lidars (PollyXT and eVe) data show regression slopes of 0.69–0.94 and Rg² > 0.74.
Session Details:
Poster Session Thursday
Time: 04/Sept/2025: 5:15pm-6:45pm · Location: Studium2000 Building5
| <strong>pdf</strong>: Adobe Acrobat "Portable Document Format"EAC2025_PO3-159_1215_Bervida Mačak.pdf |
