A5028309809- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Atmospheric Ozone and Climate
- Air Quality Monitoring and Forecasting
- Atmospheric aerosols and clouds
- Atmospheric and Environmental Gas Dynamics
- Vehicle emissions and performance
- Nanoparticles: synthesis and applications
- Coal and Its By-products
- Thermochemical Biomass Conversion Processes
- Particle Dynamics in Fluid Flows
- Healthcare and Environmental Waste Management
- Advanced Thermodynamics and Statistical Mechanics
- Gas Dynamics and Kinetic Theory
- Radioactivity and Radon Measurements
- Catalytic Processes in Materials Science
- Indoor Air Quality and Microbial Exposure
- Occupational exposure and asthma
- Fire effects on ecosystems
- Human Health and Disease
- Coal Properties and Utilization
- Advanced Combustion Engine Technologies
- Combustion and flame dynamics
- Electrohydrodynamics and Fluid Dynamics
- Advanced Aircraft Design and Technologies
Czech Academy of Sciences, Institute of Chemical Process Fundamentals
2016-2025
Czech Academy of Sciences
1993-2022
German Meteorological Service
2021
Harvard University
2020
NOAA Earth System Research Laboratory
2008-2015
National Oceanic and Atmospheric Administration
2008-2015
Cooperative Institute for Research in Environmental Sciences
2008-2015
University of Colorado Boulder
1999-2015
University of Colorado System
2015
NOAA Chemical Sciences Laboratory
2010
Abstract. We evaluate black carbon (BC) model predictions from the AeroCom intercomparison project by considering diversity among year 2000 simulations and comparing with available measurements. These model-measurement intercomparisons include BC surface aircraft concentrations, aerosol absorption optical depth (AAOD) retrievals AERONET Ozone Monitoring Instrument (OMI) column estimations based on AERONET. In regions other than Asia, most models are biased high compared to concentration...
Abstract. In this paper we describe and summarize the main achievements of European Aerosol Cloud Climate Air Quality Interactions project (EUCAARI). EUCAARI started on 1 January 2007 ended 31 December 2010 leaving a rich legacy including: (a) comprehensive database with year observations physical, chemical optical properties aerosol particles over Europe, (b) measurements in four developing countries, (c) airborne aerosols clouds Europe during May 2008, (d) modeling tools to study processes...
During the ARCPAC (Aerosol, Radiation, and Cloud Processes affecting Arctic Climate) airborne field experiment in April 2008 northern Alaska, about 50 plumes were encountered with NOAA WP‐3 aircraft between surface 6.5 km. Onboard measurements transport model FLEXPART showed that most of emitted by forest fires southern Siberia‐Lake Baikal area agricultural burning Kazakhstan‐southern Russia. Unexpectedly, these biomass dominant aerosol gas‐phase features this during April. The influence on...
Organic aerosol (OA) is a key component of total submicron particulate matter (PM1), and comprehensive knowledge OA sources across Europe crucial to mitigate PM1 levels. has well-established air quality research infrastructure from which yearlong datasets using 21 chemical speciation monitors (ACSMs) 1 mass spectrometer (AMS) were gathered during 2013-2019. It includes 9 non-urban 13 urban sites. This study developed state-of-the-art source apportionment protocol analyse long-term spectrum...
Abstract. A high-resolution global aerosol model (Oslo CTM2) driven by meteorological data and allowing a comparison with variety of observations is used to simulate radiative forcing (RF) the direct effect. The simulates all main components, including several secondary components such as nitrate organic carbon. reproduces chemical composition size features observed during large campaigns. Although compares best ground-based measurement over land for modelled sulphate, no systematic...
Using aircraft observations and transport model calculations we determine the total amounts of various gas‐phase aerosol species in Arctic due to distant biomass burning (BB) emissions. We find that for many climate‐relevant species, including black carbon (BC) organic aerosols, fires Russia typically occur during critical springtime snowmelt can more than double high seasonal atmospheric background has built up winter months (commonly called “Arctic haze”). Decision makers have targeted BC,...
Abstract. In the most advanced aerosol-climate models it is common to represent aerosol particle size distribution in terms of several log-normal modes. This approach, motivated by computational efficiency, makes assumptions about shape that may not always capture properties global aerosol. Here, a modal microphysics module (GLOMAP-mode) evaluated and improved comparing against sectional version (GLOMAP-bin) observations same 3-D offline chemistry transport model. With both schemes, model...
Abstract. A comparison exercise on thermal-optical elemental carbon/organic carbon (ECOC) analysers was carried out among 17 European laboratories. Contrary to previous exercises, the participants made use of an identical instrument set-up, after correcting for temperature offsets with application a recently developed calibration kit (Sunset Laboratory Inc, OR, US). Temperature reported by ranged from −93 +100 °C per step. Five filter samples and two sucrose solutions were analysed both...
The physical properties of indoor particles were measured with an Scanning Mobility Particle Sizer (SMPS) system (14.6–850 nm), Aerodynamic (APS, 0.54–18 μm) and Hygroscopic Tandem Differential Analyzer (H-TDMA) in apartment located urban background site Prague (Czech Republic) from 15 August to 8 September, 2014. total particle maximum number concentration was 9.38 × 104, 1.46 105, 2.89 2.25 105 1.57 106 cm−3 for released vacuum cleaning, soap/W5 cleaning spray, smoking, incense burning...
Similarities and differences in the submicron atmospheric aerosol chemical composition are analyzed from a unique set of measurements performed at 21 sites across Europe for least one year. These located between 35 62°N 10° W – 26°E, represent various types settings (remote, coastal, rural, industrial, urban). Measurements were all carried out on-line with 30-min time resolution using mass spectroscopy based instruments known as Aerosol Chemical Speciation Monitors (ACSM) Mass Spectrometers...
Although particulate organic and elemental carbon (OC EC) are important constituents of the suspended atmospheric matter (PM), measurements OC EC much less common more uncertain than e.g. ionic components PM. In framework research infrastructures supported by European Union, actions have been undertaken to determine mitigate sampling artefacts, assess comparability data obtained in a network 10 observatories across Europe. Positive artefacts (from 0.4 2.8 μg C/m3) analytical discrepancies...
<h3>Objective</h3> The use of nanotechnology is growing enormously and occupational physicians have an increasing interest in evaluating potential hazards finding biomarkers effect workers exposed to nanoparticles. <h3>Methods</h3> A study was carried out with 36 (nano)TiO<sub>2</sub> pigment 45 controls. Condensate (EBC) titanium markers oxidation nucleic acids (including 8-hydroxy-2-deoxyguanosine (8-OHdG), 8-hydroxyguanosine (8-OHG), 5-hydroxymethyl uracil (5-OHMeU)) proteins (such as...
The concentrations, size distributions, and mixing states of refractory black carbon (rBC) aerosols were measured with a ground-based Single Particle Soot Photometer (SP2), aerosol absorption was an Aethalometer at Qinghai Lake (QHL), rural area in the Northeastern Tibetan Plateau China October 2011. not pristine, average rBC mass concentration 0.36 μg STP-m(-3) during two-week campaign period. peaked night reached minimal afternoon. This diurnal cycle is negatively correlated mixed layer...
Markers of oxidative stress and inflammation were analysed in the exhaled breath condensate (EBC) urine samples 14 workers (mean age 43 ± 7 years) exposed to iron oxide aerosol for an average 10 4 years controls 39 by liquid chromatography-electrospray ionization-mass spectrometry/mass spectrometry (LC-ESI-MS/MS) after solid-phase extraction. Aerosol exposure workplace was measured particle size spectrometers, a scanning mobility sizer (SMPS) aerodynamic (APS), concentration monitors, P-TRAK...
Nanoscale titanium dioxide (nanoTiO2) is a commercially important nanomaterial. Animal studies have documented lung injury and inflammation, oxidative stress, cytotoxicity genotoxicity. Yet, human health data are scarce quantitative risk assessments biomonitoring of exposure lacking. NanoTiO2 classified by IARC as group 2B, possible carcinogen. In our earlier we an increase in markers well DNA protein damage, exhaled breath condensate (EBC) workers exposed nanoTiO2. This study focuses on...
Simultaneous particle number size distribution measurements were performed in the urban environment of Budapest, Vienna, and Prague, three Central European cities located within 450 km each other. The measurement days from continuous, 2-year long campaign classified for new formation (NPF) events using an adapted classification scheme sites. total numbers NPF event 152 69 143 Prague. There 12 when took place at all sites; 11 out these spring summer. only 2 (Budapest-Vienna), 19...