A5089499888- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Atmospheric Ozone and Climate
- Air Quality Monitoring and Forecasting
- Atmospheric aerosols and clouds
- Vehicle emissions and performance
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Maritime Transport Emissions and Efficiency
- GaN-based semiconductor devices and materials
- Photorefractive and Nonlinear Optics
- Catalytic Processes in Materials Science
- Atmospheric and Environmental Gas Dynamics
- Plant responses to elevated CO2
- Health, Environment, Cognitive Aging
- Urban Heat Island Mitigation
- Electrohydrodynamics and Fluid Dynamics
- Influenza Virus Research Studies
- Surface Modification and Superhydrophobicity
- Hungarian Social, Economic and Educational Studies
- Mass Spectrometry Techniques and Applications
- Advanced biosensing and bioanalysis techniques
- Geomagnetism and Paleomagnetism Studies
- Geological Studies and Exploration
- Advanced Aircraft Design and Technologies
Jolly Aero (Slovenia)
2019-2025
Magee Scientific (United States)
2024
University of Ljubljana
2010-2018
Jožef Stefan Institute
2013
Abstract. Providing reliable observations of aerosol particles' absorption properties at spatial and temporal resolutions suited to climate models is utter importance better understand the effects that atmospheric particles have on climate. Nowadays, one instruments most widely used in international monitoring networks for situ surface measurements light multi-wavelength dual-spot Aethalometer, AE33. The AE33 derives coefficients seven different wavelengths from optical attenuation through a...
Abstract. In the frame of EMEP/ACTRIS/COLOSSAL campaign in Milan during winter 2018, equivalent black carbon measurements using Aethalometer 31 (AE31), 33 (AE33), and a Multi-Angle Absorption Photometer (MAAP) were carried out together with levoglucosan analyses on 12 h resolved PM2.5 samples collected parallel. From AE31 AE33 data, loading-corrected aerosol attenuation coefficients (bATN) calculated at seven wavelengths (λ, where λ values are 370, 470, 520, 590, 660, 880, 950 nm). The...
Abstract. We present a newly developed total carbon analyzer (TCA08) and method for online speciation of carbonaceous aerosol with high time resolution. The content is determined by flash heating sample collected on quartz-fiber filter base between 20 min 24 h. limit detection approximately 0.3 µg C, which corresponds to concentration C m−3 at flow rate 16.7 L min−1 1 h sampling base. particulate equivalent organic (OC) subtracting black concentration, concurrently measured optically an...
Abstract. Residential wood combustion is a widespread practice in Europe with serious impact on air quality, especially mountainous areas. While there significant number of studies conducted deep urbanized valleys and basins, little known about the pollution processes rural shallow hollows, where around 30 % people areas across live. We aim to determine influence ground temperature inversions aerosol hilly, The study uses Retje karst hollow (Loški Potok, Slovenia) as representative site for...
In recent years, carbonaceous aerosols (CA) have been recognized as a significant contributor to the concentration of particles smaller than 2.5 μm (i.e., PM2.5), with negative impact on public health and Earth's radiative balance. this study, we present method for CA apportionment based high-time-resolution measurements total carbon (TC), black (BC), spectral dependence absorption coefficient using recently developed Carbonaceous Aerosol Speciation System (CASS). Two-year-long at two...
Abstract. Recent years have seen an increase in the use of wood for energy production over 30 %, and this trend is expected to continue due current crisis geopolitical instability. At present, residential burning (RWB) one most important sources organic aerosols (OAs) black carbon (BC), posing a significant risk air quality health. Simultaneously, as substantial aerosol source, RWB also holds relevance context radiative effects climate. While BC recognized its large light absorption...
Abstract. This study compares the results of three on-road chasing campaigns conducted in 2011, 2017, and 2023, making it first to report how real-world emission factors (EF) for diesel vehicles have changed over a decade. By directly measuring emissions during driving, this research provides critical insights into effectiveness control technologies regulatory interventions. The findings highlight transformative impact Diesel Particulate Filters (DPFs), which consistently reduced black...
Abstract. Brown carbon (BrC) is a fraction of organic aerosol (OA) that absorbs radiation in the ultraviolet and short visible wavelengths. Its contribution to radiative forcing uncertain due limited knowledge its imaginary refractive index (k). This study investigates variability k for OA from wildfires, residential, shipping, traffic emission sources over Europe. The Multiscale Online Nonhydrostatic Atmosphere Chemistry (MONARCH) model simulated concentrations source contributions, feeding...
Particulate matter from wood combustion has a significant impact on climate and human health. Black carbon (BC) brown (BrC) are strong light absorbers that reduce the transparency of atmosphere in long short wavelength range. As aerosol ages, some molecular chromophores break down particles become less absorbent (photobleaching). On other hand, photochemical ageing can modify organic molecules, which light-absorbing even though they were colorless after emission. In addition, secondary...
Abstract. We experimentally quantified the impact of cloud fraction and type on heating rate (HR) black brown carbon (HRBC HRBrC). In particular, we examined in more detail effect HR detected a previous study (Ferrero et al., 2018). High-time-resolution measurements aerosol absorption coefficient at multiple wavelengths were coupled with spectral direct, diffuse surface reflected irradiance lidar–ceilometer data during field campaign Milan, Po Valley (Italy). The experimental set-up allowed...
Abstract. Black carbon (BC) is recognized as the most important warming agent among atmospheric aerosol particles. The absorption efficiency of pure BC rather well-known, nevertheless mixing with other particles can enhance light efficiency, thus directly affecting Earth's radiative balance. effects on climate enhancement due to these aerosols are not yet well constrained because depend availability material for BC, creating regional variations. Here we present mass cross-section (MAC) and...
This study analyzes the aerosol optical properties (scattering, absorption coefficients, single scattering albedo), supported by chemical composition measurements, in marine boundary layer of East Mediterranean – Middle (EMME) region, aiming to explore spatio-temporal variability, mixing state, sources and dominant types. The measurements were taken during AQABA (Air Quality climate change Arabian Basin) cruise campaign (1st July September 1, 2017) from south France Kuwait back. Both...
Source apportionment (SA) techniques allocate the measured ambient pollutants with their potential source origin; thus, they are a powerful tool for designing air pollution mitigation strategies. Positive Matrix Factorization (PMF) is one of most widely used SA approaches, and its multi-time resolution (MTR) methodology, which enables mixing different instrument data in original time resolution, was focus this study. One year co-located measurements Barcelona, Spain, non-refractory...
Greater Cairo, the largest megacity of Middle East North Africa (MENA) region, is currently suffering from major aerosol pollution, posing a significant threat to public health. However, main sources pollution remain insufficiently characterized due limited atmospheric observations. To bridge this knowledge gap, we conducted continuous 2-month field study during winter 2019-2020 at an urban background site, documenting for first time chemical and physical properties submicron (PM
Abstract. Recent years have seen an increase in the use of wood for energy production over 30 %, and this trend is expected to continue due current crisis geopolitical instability. At present, residential burning (RWB) one most important sources organic aerosols (OA) black carbon (BC). While BC recognized its large light absorption cross-section, role OA still under evaluation their heterogeneous composition source-dependent optical properties. Studies that characterize wood-burning aerosol...
The formation and dimensions of G‐wires by different short G‐rich DNA sequences in solution were investigated dynamic light scattering (DLS) polyacrilamide gel electrophoresis (PAGE). To explore the basic principles wire formation, we studied effects base sequence, method preparation, temperature, oligonucleotide concentration. Both DLS PAGE show that thermal annealing induces much less macromolecular self‐assembly than dialysis. degree assembly consequently length (5‐6 nm) are well resolved...
Optical waveguides of III-metal-polar and N-polar AlGaN are grown on sapphire substrates in order to test their use integrated optics. The dispersion the ordinary extraordinary indices refraction for films with aluminum mole fraction between 0.0 0.30 at four discrete wavelengths has been determined by prism coupling method. wavelength dependence refractive is described well first-order Sellmeier formula. measurements show a small difference two polarities, which more pronounced longer wavelengths.
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Light-absorbing aerosols (LAA) impact the atmosphere by heating it. Their effect in Arctic was investigated during two summer oceanographic campaigns (2018 and 2019) around Svalbard Archipelago order to unravel differences between background local anthropic settlements. Therefore, LAA rate (HR) experimentally determined. Both chemical composition high-resolution measurements highlighted substantial Ocean (average eBC concentration of 11.7 ± 0.1 ng/m3) human settlements, among which most...
Light-absorbing aerosols heat the atmosphere; an accurate quantification of their absorption coefficient is mandatory. However, standard reference instruments (CAPS, MAAP, PAX, PTAAM) are not always available at each measuring site around world. By integrating all previous published studies concerning Aethalometers, AE33 filter loading parameter, provided by dual-spot algorithm, were used to determine multiple scattering enhancement factor from Aethalometer itself (hereinafter CAE) on yearly...
Discriminating the absorption coefficients of aerosol mineral dust and black carbon (BC) in different size fractions is a challenge because BC's large mass cross-section compared to dust. Ambient wavelength dependent (babs) supermicron submicron were determined with high time resolution. The measurements performed simultaneously using identical systems at an urban regional background site Qatar. At each site, taken by co-located Aethalometers, one virtual impactor (VI) other PM1 cyclone...
Abstract. Brown carbon (BrC) is a fraction of Organic Aerosols (OA) that absorbs radiation in the ultraviolet and short visible wavelengths. Its contribution to radiative forcing uncertain due limited knowledge its imaginary refractive index (k ). This study investigates variability k for OA from wildfires, residential, shipping, traffic emission sources over Europe. The MONARCH atmospheric chemistry model simulated concentrations source contributions, feeding an offline optical tool...