Jean‐Eudes Petit
A5048738595- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Atmospheric aerosols and clouds
- Atmospheric Ozone and Climate
- Vehicle emissions and performance
- Odor and Emission Control Technologies
- French Urban and Social Studies
- COVID-19 impact on air quality
- Atmospheric and Environmental Gas Dynamics
- Plant responses to elevated CO2
- Advanced Chemical Sensor Technologies
- Indoor Air Quality and Microbial Exposure
- Environmental Policies and Emissions
- Aeolian processes and effects
- Allergic Rhinitis and Sensitization
- Geochemistry and Geologic Mapping
- Radioactivity and Radon Measurements
- Groundwater and Isotope Geochemistry
- Analytical chemistry methods development
- Urban Heat Island Mitigation
- Climate Change and Health Impacts
- Advanced oxidation water treatment
- Historical Geography and Geographical Thought
- Wastewater Treatment and Nitrogen Removal
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2016-2025
Centre National de la Recherche Scientifique
2016-2025
CEA Paris-Saclay
2015-2025
Laboratoire des Sciences du Climat et de l'Environnement
2016-2025
Université de Versailles Saint-Quentin-en-Yvelines
2016-2025
Université Paris-Saclay
2018-2025
Centre d'Enseignement et de Recherche en Environnement Atmosphérique
2014-2024
CEA Grenoble
2023
CEA Cadarache
2023
Atmel (France)
2018-2022
Various receptor methodologies have been developed in the last decades to investigate geographical origins of atmospheric pollution, based either on wind data or backtrajectory analyses. To date, only few software packages exist make use one other approach. We present here ZeFir, an Igor-based package specifically designed achieve a comprehensive origin analysis using single statistical tool. ZeFir puts emphasis user-friendly experience order facilitate and speed up working time. Key...
Abstract. In this work, the source of ambient particulate matter (PM10) collected over a one-year period at an urban background site in Lens (France) was determined and investigated using positive matrix factorization receptor model (US EPA PMF v3.0). addition, potential contribution function (PSCF) performed by means Hybrid Single-Particle Lagrangian Integrated Trajectory (Hysplit) v4.9 to assess prevailing geographical origins identified sources. A selective iteration process followed for...
Abstract. Within the framework of air quality studies at megacity scale, highly time-resolved volatile organic compound (C2–C8) measurements were performed in downtown Paris (urban background sites) from January to November 2010. This unique dataset included non-methane hydrocarbons (NMHCs) and aromatic/oxygenated species (OVOCs) measured by a GC-FID (gas chromatograph with flame ionization detector) PTR-MS (proton transfer reaction – mass spectrometer), respectively. study presents seasonal...
Delhi, the capital of India, suffers from heavy local emissions as well regional transport air pollutants, resulting in severe aerosol loadings. To determine sources these we have quantified mass concentrations 26 elements airborne particles, measured by an online X-ray fluorescence spectrometer with time resolution between 30 min and 1 h. Measurements PM10 PM2.5 (particulate matter <10 μm < 2.5 μm) were conducted during two consecutive winters (2018 2019) Delhi. On average, Al to Pb made up...
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. Air pollution, in particular high concentrations of particulate matter smaller than 1 µm diameter (PM1), continues to be a major health problem, and meteorology is known substantially influence atmospheric PM concentrations. However, the scientific understanding ways which complex interactions meteorological factors lead high-pollution episodes inconclusive. In this study, novel, data-driven approach based on empirical relationships used characterize better understand...
This study analyzed the variability of equivalent black carbon (eBC) mass concentrations and their sources in urban Europe to provide insights into use eBC as an advanced air quality (AQ) parameter for AQ standards. compiled concentration datasets covering period between 2006 2022 from 50 measurement stations, including 23 background (UB), 18 traffic (TR), 7 suburban (SUB), 2 regional (RB) sites. The results highlighted need harmonization measurements allow direct comparisons measured across...
The 2017–2019 hourly particle number size distributions (PNSD) from 26 sites in Europe and 1 the US were evaluated focusing on 16 urban background (UB) 6 traffic (TR) framework of Research Infrastructures services reinforcing air quality monitoring capacities European URBAN & industrial areaS (RI-URBANS) project. main objective was to describe phenomenology ultrafine particles (UFP) with a significant focus. varying lower detection limits made it difficult compare PN concentrations (PNC),...
A reliable determination of equivalent black carbon (eBC) mass concentrations derived from filter absorption photometers (FAPs) measurements depends on the appropriate quantification cross-section (MAC) for converting coefficient (babs) to eBC. This study investigates spatial–temporal variability MAC obtained simultaneous elemental (EC) and babs performed at 22 sites. We compared different methodologies retrieving eBC integrating options calculating including: locally derived, median value...
Abstract. Aerosol mass spectrometer (AMS) measurements have been successfully used towards a better understanding of non-refractory submicron (PM1) aerosol chemical properties based on short-term campaigns. The recently developed Chemical Speciation Monitor (ACSM) has designed to deliver quite similar artifact-free information but for low cost, and perform robust monitoring over long-term periods. When deployed in parallel with real-time black carbon (BC) measurements, the combined data set...
Abstract. The present study aims at identifying and apportioning fine aerosols to their major sources in Paris (France) – the second most populated "larger urban zone" Europe determining geographical origins. It is based on daily chemical composition of PM2.5 examined over 1 year an background site (Bressi et al., 2013). Positive matrix factorization (EPA PMF3.0) was used identify apportion sources; bootstrapping performed determine adequate number PMF factors, statistics (root mean square...
Abstract. Studies describing the chemical composition of fine aerosol (PM2.5) in urban areas are often conducted for a few weeks only and at one sole site, giving thus narrow view their temporal spatial characteristics. This paper presents one-year (11 September 2009–10 2010) survey daily PM2.5 region Paris, which is second most populated "Larger Urban Zone" Europe. Five sampling sites representative suburban (SUB), (URB), northeast (NER), northwest (NWR) south (SOR) rural backgrounds were...
Abstract. As part of the European ACTRIS project, first large Quadrupole Aerosol Chemical Speciation Monitor (Q-ACSM) intercomparison study was conducted in region Paris for 3 weeks during late-fall – early-winter period (November–December 2013). The week dedicated to tuning and calibration each instrument, whereas second third were side-by-side comparison ambient conditions with co-located instruments providing independent information on submicron aerosol optical, physical, chemical...
Abstract. Aerosol particles are essential constituents of the Earth's atmosphere, impacting earth radiation balance directly by scattering and absorbing solar radiation, indirectly acting as cloud condensation nuclei. In contrast to most greenhouse gases, aerosol have short atmospheric residence times, resulting in a highly heterogeneous distribution space time. There is clear need document this variability at regional scale through observations involving, particular, situ near-surface...
Abstract. Black carbon is a primary aerosol tracer for high-temperature combustion emissions and can be used to characterize the time evolution of its sources. It correlated with decrease in public health contributes atmospheric warming. measurements are usually conducted absorption filter photometers, which prone several artifacts, including filter-loading effect – saturation instrumental response due accumulation sample matrix. In this paper, we investigate hypothesis that depends on...
Abstract. This paper presents the light-scattering properties of atmospheric aerosol particles measured over past decade at 28 ACTRIS observatories, which are located mainly in Europe. The data include particle light scattering (σsp) and hemispheric backscattering (σbsp) coefficients, Ångström exponent (SAE), backscatter fraction (BF) asymmetry parameter (g). An increasing gradient σsp is observed when moving from remote environments (arctic/mountain) to regional urban environments. At a...
Abstract. Online non-refractory submicron aerosol mass spectrometer (AMS) measurements in urban areas have successfully allowed the apportionment of specific sources and/or physical and chemical properties organic fraction. However, order to be fully representative PM pollution, a comprehensive source analysis is needed by taking into account all major components aerosols, creating strengthened bonds between pollution sources. We present here novel two-step methodology perform such an...
Abstract. Secondary inorganic compounds represent a major fraction of fine aerosol in the Paris megacity. The thermodynamics behind their formation is now relatively well constrained but, due to sparse direct measurements precursors (in particular NH3 and HNO3), uncertainties remain on concentrations variability as regime ammonium nitrate terms limited species among HNO3) urban environments such Paris. This study presents first background both gaseous during several months within city...
The performance and the uncertainty of receptor models (RMs) were assessed in intercomparison exercises employing real-world synthetic input datasets. To that end, results obtained by different practitioners using ten RMs compared with a reference. In order to explain differences performances uncertainties approaches, apportioned mass, number sources, chemical profiles, contribution-to-species time trends sources all evaluated methodology described Belis et al. (2015). this study, 87% 344...
Abstract. Organic aerosol (OA) particles are recognized as key factors influencing air quality and climate change. However, highly time-resolved long-term characterizations of their composition sources in ambient still very limited due to challenging continuous observations. Here, we present an analysis variability submicron OA using the combination chemical speciation monitor (ACSM) a multiwavelength Aethalometer from November 2011 March 2018 at peri-urban background site Paris region...
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...
The CARA program has been running since 2008 by the French reference laboratory for air quality monitoring (LCSQA) and regional networks, to gain better knowledge—at a national level—on particulate matter (PM) chemistry its diverse origins in urban environments. It results strong collaborations with international-level academic partners state-of-the-art, straightforward, robust methodologies within operational stakeholders (and subsequently, decision makers). Here, we illustrate some of main...
During the COVID-19 pandemic, lockdown reduced anthropogenic emissions of NO2 in Paris. concentrations recorded 2020 were lowest they have been past 5 years. Despite these low-NO2 levels, Paris experienced PM2.5 pollution episodes, which investigated here based on multi-species and multi-platform measurements. Ammonia (NH3) measurements over Paris, derived from a mini-DOAS (differential optical absorption spectroscopy) instrument Infrared Atmospheric Sounding Interferometer (IASI) satellite,...