Athanasios Nenes
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View article: Uncertainty in aerosol effective radiative forcing from anthropogenic and natural aerosol parameters in ECHAM6.3-HAM2.3
Uncertainty in aerosol effective radiative forcing from anthropogenic and natural aerosol parameters in ECHAM6.3-HAM2.3 Open
Interactions between aerosols, clouds, and radiation remain a major source of uncertainty in effective radiative forcing (ERF), limiting the accuracy of climate projections. This study aims to quantify parametric uncertainties in aerosol–c…
View article: Aerosol Chemical Characterization and Seasonal Variability at the Helmos Hellenic Atmospheric Aerosol and Climate Change Mountain Station
Aerosol Chemical Characterization and Seasonal Variability at the Helmos Hellenic Atmospheric Aerosol and Climate Change Mountain Station Open
Observations of PM 1 nonrefractory species (NRS) were performed for a 12 month period at the high‐altitude Helmos Hellenic Atmospheric Aerosol and Climate Change ((HAC) 2 ) station at 2,314 m a.s.l. using real‐time online mass spectrometry…
View article: Spatial and temporal distribution of fine aerosol acidity in the Eastern Mediterranean
Spatial and temporal distribution of fine aerosol acidity in the Eastern Mediterranean Open
Aerosol acidity (pH) affects aerosol composition and properties, and therefore climate, human health and ecosystems. Fine aerosol acidity and its seasonal variation at 6 sites (Finokalia, Patras, Thissio, Ioannina, Thessaloniki, and Xanthi…
View article: Diurnal aging of biomass burning emissions: impacts on secondary organic aerosol formation and oxidative potential
Diurnal aging of biomass burning emissions: impacts on secondary organic aerosol formation and oxidative potential Open
Residential biomass burning is an important wintertime source of aerosols. These particles are subjected to complex diurnal aging processes in the atmosphere, contributing to urban and regional air pollution. The cumulative impact of these…
View article: Implementation of Primary and Secondary Ice Production in EC-Earth3-AerChem: Global Impacts and Insights
Implementation of Primary and Secondary Ice Production in EC-Earth3-AerChem: Global Impacts and Insights Open
Clouds and aerosol–cloud interactions remain major sources of uncertainty in climate projections. We improve the representation of mixed-phase clouds (MPCs) in the EC-Earth3-AerChem Earth System Model by replacing the default temperature-d…
View article: Comparative characterization of bronchial and nasal mucus reveals key determinants of influenza A virus inhibition
Comparative characterization of bronchial and nasal mucus reveals key determinants of influenza A virus inhibition Open
Differentiated primary human respiratory epithelial cells grown at air-liquid interface have become a widely used cell culture model of the human conducting airways. These cultures contain secretory cells such as goblet and club cells, whi…
View article: Assessing the global contribution of marine aerosols, terrestrial bioaerosols, and desert dust to ice-nucleating particle concentrations
Assessing the global contribution of marine aerosols, terrestrial bioaerosols, and desert dust to ice-nucleating particle concentrations Open
Aerosol–cloud interactions, particularly ice processes in mixed-phase clouds (MPCs), remain a key source of uncertainty in climate change assessments. This study introduces state-of-the-art laboratory-based parameterizations into a global …
View article: Spatial and temporal distribution of fine aerosol acidity in the Eastern Mediterranean
Spatial and temporal distribution of fine aerosol acidity in the Eastern Mediterranean Open
Aerosol acidity (pH) affects aerosol composition and properties, and therefore climate, human health and ecosystems. Fine aerosol acidity and its seasonal variation at 6 sites (Finokalia, Patras, Thissio, Ioannina, Thessaloniki, and Xanthi…
View article: Profiling pollen and biomass burning particles over Payerne, Switzerland using laser-induced fluorescence lidar and in situ techniques during the 2023 PERICLES campaign
Profiling pollen and biomass burning particles over Payerne, Switzerland using laser-induced fluorescence lidar and in situ techniques during the 2023 PERICLES campaign Open
Vertical profiles of pollen and biomass burning particles were obtained at a semi-rural site at the MeteoSwiss station near Payerne (Switzerland) using a novel multi-channel elastic-fluorescence lidar combined with in situ measurements dur…
View article: A causal intercomparison framework unravels precipitation drivers in Global Storm-Resolving Models
A causal intercomparison framework unravels precipitation drivers in Global Storm-Resolving Models Open
Correctly representing convective precipitation remains a long-standing problem in climate models, due to its highly parameterized nature and unclear role of drivers interacting over a wide range of spatial scales. We analyze and compare s…
View article: Diurnal aging of biomass burning emissions: Impacts on secondary organic aerosol formation and oxidative potential
Diurnal aging of biomass burning emissions: Impacts on secondary organic aerosol formation and oxidative potential Open
Residential biomass burning is an important wintertime source of aerosols. These particles are subjected to complex diurnal aging processes in the atmosphere, contributing to urban and regional air pollution. The cumulative impact of these…
View article: Uncertainty in aerosol effective radiative forcing from anthropogenic and natural aerosol parameters in ECHAM6.3-HAM2.3
Uncertainty in aerosol effective radiative forcing from anthropogenic and natural aerosol parameters in ECHAM6.3-HAM2.3 Open
Interactions between aerosols, clouds, and radiation remain one of the largest sources of uncertainty in effective radiative forcing (ERF), limiting the accuracy of climate projections. Despite progress, key sources of parametric and struc…
View article: Airborne Microorganisms at Hellenic Atmospheric Aerosol and Climate Change Station in Helmos Mountain (Greece)
Airborne Microorganisms at Hellenic Atmospheric Aerosol and Climate Change Station in Helmos Mountain (Greece) Open
Cultural-based methods of bacteria and fungi and molecular identification of bacteria were combined with parallel continuous measurements of aerosol chemical composition, number size distribution, ice-nucleating concentration, and fluoresc…
View article: Evaluation of in-situ metrics for determining the influence of the Planetary Boundary Layer at the Helmos Hellenic Atmospheric Aerosol & Climate Change (HAC)2 station 
Evaluation of in-situ metrics for determining the influence of the Planetary Boundary Layer at the Helmos Hellenic Atmospheric Aerosol & Climate Change (HAC)2 station  Open
Understanding aerosol properties and their life cycle in regional air masses is essential for assessing their impacts on clouds, precipitation and climate. High-altitude mountain stations, often emphasized as free-tropospheric measurement …
View article: Fluorescent primary bioaerosol particle measurements in mixed phase cloud residuals at Mount Helmos, Greece
Fluorescent primary bioaerosol particle measurements in mixed phase cloud residuals at Mount Helmos, Greece Open
The partitioning between liquid- and ice-phase cloud water content can have a substantial impact on the cloud’s radiative effect and on precipitation. This partitioning is expected to change on average with global warming due to warm…
View article: Detection of bioparticles by synergy of depolarisation-LIF lidars supported by in situ measurements at the high alpine station of Helmos, Greece, during the CHOPIN campaign 2024
Detection of bioparticles by synergy of depolarisation-LIF lidars supported by in situ measurements at the high alpine station of Helmos, Greece, during the CHOPIN campaign 2024 Open
The Cleancloud Helmos OrograPhic site experimeNt (CHOPIN) campaign took place in autumn 2024 at a unique high-altitude location at Mount Helmos, Greece (38.0oN, 22.2oE) ideal for targeted studies of aerosol-cloud interactions (ACI) due to …
View article: Emission Factors of Primary Pollutants from a Real-world Tunnel Measurement
Emission Factors of Primary Pollutants from a Real-world Tunnel Measurement Open
With over 1.6 billion vehicles worldwide, the combustion of fossil fuels is a major source of particulate matter (PM) and trace gases, which significantly contribute to air pollution, climate change and cause health burden. Heavy-duty vehi…
View article: Enhanced molecular characterization of atmospheric organic aerosols in the Western Mediterranean basin by Fourier transform mass spectrometry 
Enhanced molecular characterization of atmospheric organic aerosols in the Western Mediterranean basin by Fourier transform mass spectrometry  Open
Atmospheric aerosols (AAs) significantly influence the global radiative balance, air quality, biogeochemical cycles, and human health. While their climate and health impacts are well-studied, their biogeochemical role, including contributi…
View article: Exploring local and long-range aerosol source contributions to summertime CCN in Southern Greenlandic fjord systems
Exploring local and long-range aerosol source contributions to summertime CCN in Southern Greenlandic fjord systems Open
The Greenland Ice Sheet (GrIS) discharges ~1000 Gt yr-1 of freshwater into Arctic coastal oceans in the form of meltwater runoff and glacial discharge, with the majority entering the ocean via fjords. Fjordic ecosystems lie at the nexus of…
View article: An Investigation of the Validity of Secondary Ice Production Parameterizations in WRF in an Orographic Environment with Preliminary Data From CHOPIN
An Investigation of the Validity of Secondary Ice Production Parameterizations in WRF in an Orographic Environment with Preliminary Data From CHOPIN Open
Mixed-phase clouds play a key role in weather and climate and are a major challenge to model accurately in models. Nevertheless, considerable progress on modeling microphysical processes in mixed-phase clouds, such as primar…
View article: Exploring the oxidative potential of vehicles emissions from bench dynamometer to underground tunnels and parking lots 
Exploring the oxidative potential of vehicles emissions from bench dynamometer to underground tunnels and parking lots  Open
Health effects associated with aerosol exposure have been widely studied, demonstrating a positive association with mortality and poor health from a diversity of ailments. Emissions from vehicular traffic have been a major source of air po…