A5062586156- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Vehicle emissions and performance
- Air Quality Monitoring and Forecasting
- Atmospheric Ozone and Climate
- Atmospheric aerosols and clouds
- Toxic Organic Pollutants Impact
- Wind and Air Flow Studies
- Particle Dynamics in Fluid Flows
FORTH Institute of Chemical Engineering Sciences
2017-2024
Foundation for Research and Technology Hellas
2014-2023
University of Patras
2013-2017
Significance To quantify the full implications of biomass burning emissions on atmosphere, it is essential to accurately represent emission plume after has undergone chemical aging in atmosphere. Atmospheric models typically consider predominant pathway take place presence sunlight (via OH radical); however, this mechanism leads consistent underpredictions oxidized organic aerosol wintertime urban areas. Here, we show, through a combination laboratory experiments, ambient field measurements,...
Abstract. The particulate matter source apportionment technology (PSAT) is used together with PMCAMx, a regional chemical transport model, to estimate how local emissions and pollutant affect primary secondary mass concentration levels in Paris. During the summer winter periods examined, only 13% of PM2.5 predicted be due Paris emissions, 36% coming from mid-range (50–500 km center Paris) sources 51% long range (more than 500 Paris). contribution simulated elemental carbon (EC) significant,...
Abstract. A detailed three-dimensional regional chemical transport model (Particulate Matter Comprehensive Air Quality Model with Extensions, PMCAMx) was applied over Europe, focusing on the formation and transformation of organic matter. Three periods representative different seasons were simulated, corresponding to intensive field campaigns. An extensive set AMS measurements used evaluate and, using factor-analysis results, gain more insight into sources transformations aerosol (OA)....
The purpose of this study was to estimate cardiopulmonary mortality associations for long-term exposure PM2.5 species and sources (i.e., components) within the U.S. National Health Interview Survey cohort. Exposures were estimated through a chemical transport model six elemental carbon (EC), primary organic aerosols (POA), secondary (SOA), sulfate (SO4), ammonium (NH4), nitrate (NO3)) five vehicles, electricity-generating units (EGU), non-EGU industrial sources, biogenic (bio), "other"...
Abstract Wildfires are a significant source of organic aerosol during summer, with major impacts on air quality and climate. However, studies in Europe suggest surprisingly low (less than 10%) contribution biomass burning to average summertime fine particulate matter levels. In this study we combine field measurements atmospheric chemical transport modeling, demonstrate that the wildfires particle levels summer is seriously underestimated. Our work suggests corresponding has been...
Abstract. We use a three-dimensional regional chemical transport model (PMCAMx) with high grid resolution and high-resolution emissions (4 × 4 km2) over the Paris greater area to simulate formation of carbonaceous aerosol during summer (July 2009) winter (January/February 2010) period as part MEGAPOLI (megacities: emissions, urban, regional, global atmospheric pollution climate effects, Integrated tools for assessment mitigation) campaigns. Model predictions are compared against Aerodyne...
Five case studies (Athens and Paris in Europe, Pittsburgh Los Angeles the United States, Mexico City Central America) are used to gain insights into changing levels, sources, role of atmospheric chemical processes air quality large urban areas as they develop technologically. Fine particulate matter is focus our analysis. In all cases reductions emissions by industrial transportation sources have resulted significant improvements during last few decades. However, these changes increasing...
On-road vehicles are an important source of atmospheric particulate matter (PM), producing both primary aerosol and gas-phase precursors, which react in the atmosphere lead to formation secondary aerosol. Over past 50 years, emissions from exhaust passenger cars have been thoroughly studied, on contrary, other on-road vehicles, like mopeds, buses, heavy-duty received less attention. Moreover, as regulatory measures reduce concentrations emitted significance precursors increases. The aim this...
Black carbon (BC) and brown (BrC) are light-absorbing carbonaceous aerosol components that can contribute to radiative forcing thus affect the climate. In this study, we focus on modification of optical properties associated with BrC emissions from biomass burning. is simulated introduction three new species in three-dimensional chemical transport model PMCAMx-SR, two primary-absorbing (inert reactive BrC) species, one "photobleached" species. 10% emitted assumed be inert, rest able undergo...
The formation, atmospheric evolution, properties, and removal of organic particulate matter remain some the least understood aspects chemistry despite importance aerosol (OA) for both human health climate change. Here, we summarize our recent efforts to deal with chemical complexity tens thousands compounds in atmosphere using volatility-oxygen content framework (often called 2D-Volatility Basis Set, 2D-VBS). Our current ability measure ambient OA concentration as a function its volatility...
Abstract. Significant reductions in emissions of SO2, NOx, volatile organic compounds (VOCs), and primary particulate matter (PM) took place the US from 1990 to 2010. We evaluate here our understanding links between these changes corresponding concentrations health outcomes using a chemical transport model, Particulate Matter Comprehensive Air Quality Model with Extensions (PMCAMx), for 1990, 2001, The use Particle Source Apportionment Algorithm (PSAT) allows us link concentration sources...
Abstract. Factor analysis of aerosol mass spectrometer measurements (organic spectra) is often used to determine the sources organic (OA). In this study we aim gain insights regarding ability positive matrix factorization (PMF) identify and quantify OA accurately. We performed PMF multilinear engine (ME-2) on predictions a state-of-the-art chemical transport model (PMCAMx-SR, Particulate Matter Comprehensive Air Quality Model with extensions – source resolved) during photochemically active...
Abstract. The Particulate Matter Source Apportionment Technology (PSAT) is used together with PMCAMx, a regional chemical transport model, to estimate how local emissions and pollutant affect primary secondary particulate matter mass concentration levels in Paris. During the summer winter periods examined, only 13% of PM2.5 predicted be due Paris emissions, 36% coming from mid range (50–500 km center Paris) sources 51% long (more than 500 Paris). contribution elemental carbon (EC)...
Air pollution forecasting systems are useful tools for the reduction in human health risks and eventual improvement of atmospheric quality on regional or urban scales. The SmartAQ (Smart Quality) system combines state-of-the-art meteorological chemical transport models to provide detailed air pollutant concentration predictions at a resolution 1 × km2 area interest next few days. Weather Research Forecasting (WRF) mesoscale numerical weather prediction model is used produce fields PMCAMx...
Abstract. A detailed three-dimensional regional chemical transport model (PMCAMx) was applied over Europe focusing on the formation and transformation of organic matter. Three periods representative different seasons were simulated, corresponding to intensive field campaigns. An extensive set AMS measurements used evaluate and, using factor analysis results, gain more insight into sources transformations aerosol (OA). Overall, agreement between predictions for OA concentration is encouraging...
<p>Oxidized organic aerosol (OOA) is a major component of ambient particulate matter, substantially affecting both climate and human health. A considerable body evidence has established that OOA readily produced in the presence daylight, thus leading to association high concentrations summer or mid-afternoon. However, this current mechanistic understanding fails explain elevated during night wintertime periods low photochemical activity, atmospheric models under predict by...
Abstract. We use a three dimensional regional chemical transport model (PMCAMx) with high grid resolution and emissions (4 km × 4 km) over the Paris greater area to simulate formation of carbonaceous aerosol during summer (July 2009) winter (January/February 2010) period as part MEGAPOLI (Megacities: Emissions, urban, regional, Global Atmospheric POLlution climate effects, Integrated tools for assessment mitigation) campaigns. Model predictions are compared against Aerodyne mass spectrometer...
Abstract. Factor analysis of Aerosol Mass Spectrometer measurements (organic aerosol mass spectra) is often used to determine the sources organic (OA). In this study we aim gain insights regarding ability positive matrix factorization (PMF) identify and quantify OA accurately. We performed PMF multilinear engine (ME-2) on predictions a state-of-the-art chemical transport model (PMCAMx-SR) during photochemically active period for specific sites in Europe an effort interpret diverse factors...