A5042527817- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Air Quality Monitoring and Forecasting
- Air Quality and Health Impacts
- Atmospheric and Environmental Gas Dynamics
- Aeolian processes and effects
- Meteorological Phenomena and Simulations
- Atmospheric Ozone and Climate
- Geophysics and Gravity Measurements
- Cryospheric studies and observations
- Remote Sensing in Agriculture
- Arctic and Antarctic ice dynamics
- Icing and De-icing Technologies
- Fire effects on ecosystems
- Material Dynamics and Properties
- Advanced Polymer Synthesis and Characterization
- COVID-19 impact on air quality
- Indoor Air Quality and Microbial Exposure
- Mass Spectrometry Techniques and Applications
- Plant responses to elevated CO2
- Block Copolymer Self-Assembly
- Methane Hydrates and Related Phenomena
- Spectroscopy and Laser Applications
- Marine and coastal ecosystems
- Ocean Acidification Effects and Responses
National Technical University of Athens
2019-2025
Foundation for Research and Technology Hellas
2023-2025
École Polytechnique Fédérale de Lausanne
2024-2025
National Centre of Scientific Research "Demokritos"
2022-2024
Research Academic Computer Technology Institute
2023
University of Crete
2018
Abstract. Remote sensing measurements of aerosols using depolarization Raman lidar systems from four EARLINET (European Aerosol Research Lidar Network) stations are used for a comprehensive analysis Saharan dust events over the Mediterranean basin in period 2014–2017. In this period, 51 regarding geometrical, optical and microphysical properties were selected, classified assessed according to their radiative forcing effect on atmosphere. From west east, Granada, Potenza, Athens Limassol...
Abstract. The purpose of this study is to understand the drivers cloud droplet formation in orographic clouds. We used a combination modeling, in-situ and remote sensing measurements at high-altitude Helmos Hellenic Atmospheric Aerosol Climate Change station ((HAC)2), which located top Mt. (1314 metres above sea level), Greece during Cloud-AerosoL InteractionS background TropOsphere (CALISTHO) campaign Fall 2021 (https://calishto.panacea-ri.gr/) examine origins aerosols (i.e., local aerosol...
Abstract. The Cloud-AerosoL InteractionS in the Helmos background TropOsphere (CALISHTO) campaign took place autumn 2021 at NCSR Demokritos high-altitude Hellenic Atmospheric Aerosol and Climate Change station (HAC)2 to study interactions between aerosols clouds. current presents chemical characterization of non-refractory (NR) PM1 aerosol fraction using a time-of-flight speciation monitor (ToF-ACSM). A comparative offline filter analysis by high-resolution mass spectrometer (HR-ToF-AMS)...
Mixed-phase clouds play a key role in weather and climate are a major challenge to model accurately in models. Nevertheless, considerable progress on modeling microphysical processes mixed-phase clouds, such as primary Secondary Ice Production (SIP) has led systematic improvements performance.Here, we use the Weather Research Forecasting (WRF) model with the EPFL/FORTH cloud scheme (Georgakaki et al., 2024) simulate weather, formation...
Understanding aerosol properties and their life cycle in regional air masses is essential for assessing impacts on clouds, precipitation climate. High-altitude mountain stations, often emphasized as free-tropospheric measurement sites, are ideal cloud climate research. However, depending the season time of day, high-altitude sites may be influenced by planetary boundary layer (PBL) due to convective transport. The segregation between PBL-influenced (FT) remains a challenging but critical...
　Ice formation in mixed-phase clouds is a critical component of their evolution and impacts on the hydrological cycle climate. Nevertheless, quantification link to different aerosol sources (dust, biological particles) impact atmospheric aging leads considerable uncertainty description models. Observations at high altitude mountaintop sites can provide way alleviate this uncertainty, as observations be carried out for extensive periods time, sample both free tropospheric boundary...
The Cleancloud Helmos OrograPhic site experimeNt (CHOPIN) campaign took place in autumn 2024 at a unique high-altitude location Mount Helmos, Greece (38.0oN, 22.2oE) ideal for targeted studies of aerosol-cloud interactions (ACI) due to its strategic location, serving as crossroad different aerosol transport paths. This position allows the detection wide range particles like wildfire smoke, continental polluted, marine and mineral dust from Sahara, well bioparticles (pollen, bacteria, fungal...
The Payerne lidaR and Insitu detection of fluorescent biomass burning dust partiCLES their cloud impact (PERICLES) campaign (May - June 2023) took place at the rural site Payerne, Switzerland (46.82o N, 6.94o E, 491 m a.s.l.), premises MeteoSwiss station. PERICLES aimed to understand spatio-temporal variability different types bioaerosols (biomass burning, pollen, dust, etc.) in Planetary Boundary Layer aloft (typically up 2-5 km asl.) role formation. As play a crucial formation on human...
Atmospheric acidity is a major aerosol parameter that influences atmospheric chemistry, nutrient availability and deposition rates, formation growth availability, toxicity the ability of to nucleate ice crystals cloud droplets. Aerosol depends on concentration volatility precursor gases/bases, amount non-volatile cations (such as Ca, K, Mg), sulfate, temperature humidity. Understanding how changes between airmasses its vertical evolution from moist, warm boundary layer conditions (close...
The partitioning between liquid- and ice-phase cloud water content can have a substantial impact on the cloud’s radiative effect precipitation. This is expected to change average with global warming due warmer temperatures, more atmospheric moisture, different nucleating particle distributions, which then feed back into changing climate. Changes in mixed phase clouds (MPCs)  are difficult predict complexity of microphysical processes that determine uncertainty future...
Aerosol-Cloud Interactions (ACI) play an important role in the hydrological cycle and are strong modulators of cloud radiative forcing climate. Nevertheless, they remain poorly understood constrained despite decades research, because many processes feedbacks highly uncertain challenging to describe regional global climate models. Even less is natural aerosol ACI a post-fossil future, where anthropogenic emissions vastly reduced but emerging “natural” sources modulated by...
In recent years, there has been a breakthrough in the identification and description of various secondary ice production (SIP) mechanisms that affect mixed-phase clouds. However, SIP is general not described well climate mesoscale models, which leads to notable biases representation warm clouds terms content, number concentration cloud structure. this study, Integrated Community Limited Area Modelling System (ICLAMS) utilized examine formation evolution wintertime orographic over Mt. Helmos,...
Abstract We report the drivers of spatiotemporal variability ice nucleating particles (INPs) for mixed-phase orographic clouds (~−25 °C) in Eastern Mediterranean. In planetary boundary layer, pronounced INP diurnal periodicity is observed, which mainly driven by biological (and to a lesser extent, dust) but not aerosols from biomass burning. The comparison size-resolved and fluorescence-discriminated aerosol particle properties with INPs reveals primary role fluorescent bioaerosol. presence...
Vertical profiling of aerosol particles was performed during the PANhellenic infrastructure for Atmospheric Composition and climatE chAnge (PANACEA) winter campaign (10 January 2020–7 February 2020) over city Ioannina, Greece (39.65° N, 20.85° E, 500 m a.s.l.). The middle-sized Ioannina suffers from wintertime air pollution episodes due to biomass burning (BB) domestic heating activities. lidar technique applied PANACEA on city, fill gap knowledge spatio-temporal evolution vertical mixing...
Recent years have shown that secondary ice production (SIP) is ubiquitous, affecting all clouds from polar to tropical regions. SIP not described well in models and may explain biases warm mixed-phase cloud content structure. Through modeling constrained by in-situ observations its synergy with radar we show orographic exert a profound impact on the vertical distribution of hydrometeors precipitation, especially seeder-feeder configurations. The mesoscale model simulations coupled simulator...
We report on a long-lasting (10 days) Saharan dust event affecting large sections of South-Eastern Europe by using synergy lidar, satellite, in-situ observations and model simulations over Athens, Greece. The measurements (11–20 May 2020), performed during the confinement period due to COVID-19 pandemic, revealed interesting features aerosol properties in absence important air pollution sources European continent. During event, moderate optical depth (AOD) values (0.3–0.4) were observed...
Abstract. Aerosol-cloud interactions in mixed-phase clouds (MPCs) are one of the most uncertain drivers hydrological cycle and climate change. A synergy in-situ, remote sensing modelling experiments was used to determine source ice nucleating particles (INPs) for MPCs at Mount Helmos Eastern Mediterranean. The influences boundary layer turbulence, vertical aerosol distributions meteorological conditions were also examined. When observation site is Free Troposphere (FT), approximately 1 106...
In the present study, we aerosol optical properties and radiative forcing (RF) of tropospheric stratospheric smoke layers, observed by Cloud-Aerosol Lidar Infrared Pathfinder Satellite Observation (CALIPSO) satellite, during extraordinary Australian biomass burning (BB) event in 2019–2020. These BB layers were studied analyzed within longitude range 140° E–20° W latitude band 20°–60° S, as they gradually transported from banks to South American continent. found be trapped Andes circulation,...
We present a detailed simulation study of the structural and dynamical behavior star-shaped mikto-arm (polystyrene)8(poly(ethylene oxide))8, (PS)8(PEO)8, copolymers with eight arms each type, versus that linear polystyrene-block-poly(ethylene oxide), PS-b-PEO, diblock, in selective homopolymer host. Both are blended at same weight fraction 33% an oligomeric PEO use atomistic molecular dynamics simulations to account for interactions blends quantitatively properties these systems. The...