A5009080201- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Air Quality and Health Impacts
- Plant responses to elevated CO2
- nanoparticles nucleation surface interactions
- Climate change and permafrost
- Polar Research and Ecology
- Microplastics and Plastic Pollution
- Air Quality Monitoring and Forecasting
- Aeolian processes and effects
- Cryospheric studies and observations
- Marine and coastal plant biology
- Atmospheric Ozone and Climate
- Vehicle emissions and performance
- Additive Manufacturing and 3D Printing Technologies
- Allergic Rhinitis and Sensitization
- Turfgrass Adaptation and Management
- Biosensors and Analytical Detection
- Icing and De-icing Technologies
- Recycling and Waste Management Techniques
TU Wien
2022-2025
University of Vienna
2020-2021
Abstract. Within the last years pollen grains have gained increasing attention due to their cloud-forming potential. Especially discovery that ice nucleating macromolecules (INMs) or subpollen particles (SPPs) obtained from are able initiate freezing has stirred up interest in pollen. INMs and SPPs much smaller potentially more numerous than could significantly affect cloud formation atmosphere. However, not clearly distinguished. This motivated present study, which focuses on birch...
Microplastic particles in the atmosphere are regularly detected urban areas as well very remote locations. Yet sources, chemical transformation, transport, and abundance of airborne microplastics still remain largely unexplained. Therefore, their impact on health, weather climate related processes lacks comprehensive understanding. Single particle detection presents a substantial challenge due to its time-consuming process is conducted solely offline. To get more information about...
Terrestrial ecosystems can influence atmospheric processes by contributing a huge variety of biological aerosols (bioaerosols) to the environment. Several types particles, such as pollen grains, fungal spores, and bacteria cells, trigger freezing in super-cooled cloud droplets, contribute hydrological cycle. Even though biogenic particles are known most active form ice nucleation (INPs), transport high tropospheric altitudes, well occurrence clouds, remains understudied. Thus, from land...
Abstract. Fluorescent aerosol particles (FAPs) as a fraction of total (TAPs) were measured online with Wideband Integrated Bioaerosol Sensor 5/NEO (WIBS, Droplet Measurement Technologies) from mid-September to mid-December during the Pallas Cloud Experiment 2022 (PaCE22) at Sammaltunturi station, located in sub-Arctic region Finnish Lapland. The WIBS measures particle size distributions 0.5 30 µm and fluorescence three channels single particles, well concentrations. Since most biological...
Primary biological aerosol particles (PBAPs), including fungal spores, bacteria and pollen grains, are widely distributed in the atmosphere. Some PBAPs highly efficient ice nucleating (INPs), but their impact on atmospheric formation is currently uncertain. have been associated with INPs that active at high sub-zero temperatures may contribute disproportionally  in places little anthropogenic influence, such as Arctic [1] boreal forest [2].This study investigates pristine Finnish...
Forests are increasingly recognized as significant sources of biogenic aerosols, impacting air quality and climate. However, understanding the distribution transport these aerosols within above forest canopies remains a challenge. This study investigates vertical profiles aerosol volatile organic compound (VOC) concentrations spruce in Lower Austria using novel analytical instrument packages on Uncrewed Aerial Vehicles (UAV).In our campaign we used multiple UAVs outfitted with various...
Abstract. Primary biological aerosol particles (PBAPs) can influence weather and climate by acting as high-temperature ice nucleating (INPs), especially in clean, rural regions like the European sub-Arctic. However, actual contribution to atmospheric nucleation exact identity of PBAPs serving INPs remains poorly understood. Here, we present measurements highly fluorescent (HFAPs) over course one year, at Pallas Atmosphere-Ecosystem Supersite Finnish sub-Arctic, aiming determine whether...
Abstract. Within the last years pollen grains have gained increasing attention due to their cloud forming potential. Especially discovery that ice nucleating macromolecules (INM) or subpollen particles (SPP) obtained from are able initiate freezing has stirred up interest in pollen. INM SPP much smaller and potentially more numerous than could significantly affect formation atmosphere. However, not clearly distinguished explanations on how these materials distribute atmosphere missing. In...
Microplastic particles in the atmosphere are regularly detected urban areas as well very remote locations. Yet sources, chemical transformation, transport, and abundance of airborne microplastics still remains largely unexplained. Therefore, their impact on health, weather climate related processes lacks comprehensive understanding. Single particle detection presents a substantial challenge due to its time-consuming process is conducted solely offline. To get more information about...
<p>Microplastic particles in the atmosphere, even very remote locations (Allen 2021; Allen 2019, Materić 2020, 2021), have attracted considerable interest recent years. The origin, chemical transformation, transport and abundance of airborne microplastics still remains largely unexplained. Detection techniques are scarce often include visual classification with naked eye or an optical microscope (Lulu 2021).</p><p>In this study,...
<p>Wind pollinated trees such as birch release large amounts of pollen to the atmosphere during their blooming season in early spring. Due size (birch diameter: 20-25 µm) and short residence time atmosphere, impact on cloud formation was believed be negligible. However, recent years studies have shown that ice nucleating materials, so called macromolecules (INM), much smaller can extracted from pollen. At same there is evidence medical rupture under conditions high...
<p>During the blooming season of trees, pollen is an important component atmospheric aerosol, even in urban areas. Wind pollinated plants such as early flowering trees (e.g. birch, alder) release grains extremely large quantities. Once atmosphere can impact human health and cloud formation (Schäppi et al. 1999, Pummer 2012, Steiner 2015). Intact are rather with geometrical diameters from 10-100 μm therefore have short residence times atmosphere....
<p>Aerosol particles that act as cloud condensation nuclei (CCN) inuence albedo and lifetime thereby affect the planetary radiative balance. The indirect aerosol effect on climate is still one of largest uncertainties especially role biological not yet well described. Pollen grains are primary become airborne during blooming season plants. from wind pollinated plants represent a seasonally signifficant portion organic in atmosphere. Intact pollen rather large (10-100...
<p>Terrestrial ecosystems can contribute various particles to the troposphere, some of which are known for their ice nucleation activity. Most land-surface in Europe is covered with forests and fields, representing potential sources active bioaerosols form pollen grains, fungal spores bacterial cells. The presence biogenic ice-nucleating (INPs) clouds leads heterogeneous freezing events therefore influences hydrological cycle Earth’s climate. Many studies focus on...
<p>Within the last years pollen grains have gained increasing attention due to their cloud-forming potential. Especially discovery that ice nucleating macromolecules (INMs) or subpollen particles (SPPs) obtained from are able initiate freezing has stirred up interest in pollen. INMs SPPs much smaller and potentially more numerous than could significantly affect cloud formation atmosphere.</p><p>However, not clearly distinguished. This motivated...
<p>Asphalt related emissions act as non-traditional sources of secondary organic aerosol precursors (Khare, 2018). We have evaluated generated during asphalt pavement construction and compared it to background laboratory measurements. Particle size distribution construction, measurements were performed with an Optical Counter (OPC) correlated a Wideband Integrated Bioaerosol Sensor (WIBS). Fluorescence intensity particles both the process recorded two excitation wavelengths...