A5062465370- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Atmospheric Ozone and Climate
- Air Quality and Health Impacts
- Aeolian processes and effects
- Meteorological Phenomena and Simulations
- Atmospheric and Environmental Gas Dynamics
- Air Quality Monitoring and Forecasting
- Vehicle emissions and performance
- Plant responses to elevated CO2
- Geophysics and Gravity Measurements
- Earthquake Detection and Analysis
- Coastal and Marine Management
- Maritime Transport Emissions and Efficiency
- Ionosphere and magnetosphere dynamics
- Oil Spill Detection and Mitigation
- Advanced Aircraft Design and Technologies
- Energy and Environment Impacts
- Lichen and fungal ecology
- Fire effects on ecosystems
- International Law and Aviation
- Wind and Air Flow Studies
- Peatlands and Wetlands Ecology
- Aviation Industry Analysis and Trends
- Remote Sensing and LiDAR Applications
Centre National de Recherches Météorologiques
2015-2024
Météo-France
2015-2024
Centre National de la Recherche Scientifique
2015-2024
Université de Toulouse
2019-2024
Leibniz Institute for Tropospheric Research
2014-2021
Université Paris Cité
2013-2019
Laboratoire Interuniversitaire des Systèmes Atmosphériques
2013-2019
Laboratoire Techniques, Territoires et Sociétés
2014-2019
Université Paris-Est Créteil
2013-2019
Institut Pierre-Simon Laplace
2013-2019
Abstract The Aerosol, Radiation and Clouds in southern Africa (AEROCLO-sA) project investigates the role of aerosols on regional climate Africa. This is a unique environment where natural anthropogenic semipermanent widespread stratocumulus (Sc) cloud deck are found. aims to understand dynamical, chemical, radiative processes involved aerosol–cloud–radiation interactions over land ocean under various meteorological conditions. AEROCLO-sA field campaign was conducted August September 2017...
Abstract. This study presents in situ aircraft measurements of Saharan mineral dust transported over the western Mediterranean basin June–July 2013 during ChArMEx/ADRIMED (the Chemistry-Aerosol Experiment/Aerosol Direct Radiative Impact on regional climate MEDiterranean region) airborne campaign. Dust events differing terms source region (Algeria, Tunisia and Morocco), time transport (1–5 days) height were sampled. Mineral above marine boundary layer, which conversely was dominated by...
Abstract. The Chemistry-Aerosol Mediterranean Experiment (ChArMEx; http://charmex.lsce.ipsl.fr) is a collaborative research program federating international activities to investigate regional chemistry-climate interactions. A special observing period (SOP-1a) including intensive airborne measurements was performed in the framework of Aerosol Direct Radiative Impact on climate MEDiterranean region (ADRIMED) project during dry season over western and central basins, with focus...
Abstract The European Union (EU)-funded project Dynamics–Aerosol–Chemistry–Cloud Interactions in West Africa (DACCIWA) investigates the relationship between weather, climate, and air pollution southern Africa—an area with rapid population growth, urbanization, an increase anthropogenic aerosol emissions. over this region contains a unique mixture of natural gases, liquid droplets, particles, emitted environment which multilayer clouds frequently form. These exert large influence on local...
Abstract Direct and semi‐direct radiative effects of biomass burning aerosols (BBA) from southern central African fires are still widely debated, in particular because climate models have been unsuccessful reproducing the low single scattering albedo BBA over eastern Atlantic Ocean. Using state‐of‐the‐art airborne situ measurements Mie simulations, we demonstrate that well‐aged plumes West Africa results presence strongly absorbing refractory black carbon (rBC), whereas brown contribution to...
Abstract. In this study, vertical profiles and column-integrated aerosol properties retrieved by the GRASP (Generalized Retrieval of Atmosphere Surface Properties) algorithm are evaluated with in situ airborne measurements made during ChArMEx-ADRIMED field campaign summer 2013. framework campaign, two different flights took place over Granada (Spain) a desert dust episode on 16 17 June. The algorithm, which combines lidar sun–sky photometer data measured at Granada, was used to retrieve...
Abstract. Biological particles such as bacteria, fungal spores or pollen are known to be efficient ice nucleating particles. Their ability nucleate is due nucleation active macromolecules (INMs). It has been suggested that these INMs maintain their even when they separated from original carriers. This opens the possibility of an accumulation in soils, resulting internal mixture mineral dust and INMs. If soils which contain biological then dispersed into atmosphere wind erosion agricultural...
Abstract. Comprehensive field campaigns dedicated to fog life cycle observation were conducted during the winters of 2010–2013 at Instrumented Site for Atmospheric Remote Sensing Research (SIRTA) observatory in a suburb Paris. In order document their properties, situ microphysical measurements collected 23 events induced by both radiative cooling and stratus lowering are examined here. They reveal large variability number, concentration size aerosol background before onset droplets according...
Abstract. Southern West Africa (SWA) is an African pollution hotspot but a relatively poorly sampled region of the world. We present overview in situ aerosol optical measurements collected over SWA June and July 2016 as part DACCIWA (Dynamics-Aerosol-Chemistry-Clouds Interactions Africa) airborne campaign. The aircraft wide range air masses, including anthropogenic plumes emitted from coastal cities, long-range transported biomass burning central southern dust Sahara Sahel region, well...
Abstract. Through observations of NO, NO2, NOY and O3 in the Rambouillet forest near Paris, France, (as part ACROSS campaign, 2022) we have gained insight into nighttime processes controlling NOX an anthropogenically impacted environment. mixing ratios displayed a strong diel profile at site, which was driven by variable but generally rapid deposition to soil foliar surfaces. The strongly influenced relative humidity, surface resistance uptake, temperature inversion, rate entrainment from...
Abstract. Mineral dust from arid areas is a major component of global aerosol and has strong interactions with climate biogeochemistry. As part the Chemistry-Aerosol Mediterranean Experiment (ChArMEx) to investigate atmospheric chemistry its impacts in region, an intensive field campaign was performed mid-June early August 2013 western basin including situ balloon-borne measurements light optical counter (LOAC). LOAC counter/sizer that provides concentrations 19 size classes between 0.2 100...
Abstract We present the first direct evidence that hygroscopic properties of super micron (>1 µm) African dust particles did not change despite undergoing long‐range transport across Atlantic toward Caribbean. Concurrent measurements chemical composition show most mineral was chemically unprocessed and externally mixed. A minor portion internally mixed with sulfate chloride (~13–24% by number) or aggregated sea‐salt (~3–6%). Only sea salt showed significant growth above 75% relative...
Abstract. Vast stretches of agricultural land in southern and central Africa are burnt between June September each year, which releases large quantities aerosol into the atmosphere. The resulting smoke plumes carried west over Atlantic Ocean at altitudes 2 4 km. As only limited observational data West have existed until now, whether this pollution has an impact lower remained unclear. Dynamics-aerosol-chemistry-cloud interactions (DACCIWA) aircraft campaign took place during July 2016, with...
Abstract The transatlantic transport of mineral dust from Africa is a persistent atmospheric phenomenon, clue for understanding the impacts at global scale. As part DUST Aging and Transport to Caribbean (Dust‐ATTACk) intensive field campaign, size distribution optical properties were measured in June–July 2012 on east coast Puerto Rico, more than 5000 km west Africa. During recorded events, PM 10 (particulate matter micrometers or less diameter) concentrations increased 20 70 µg m −3 ....
Abstract. Aerosol radiative properties are investigated in southeastern Spain during a dust event on 16–17 June 2013 the framework of ChArMEx/ADRIMED (Chemistry-Aerosol Mediterranean Experiment/Aerosol Direct Radiative Impact regional climate MEDiterranean region) campaign. Particle optical and microphysical from ground-based sun/sky photometer lidar measurements, as well situ measurements board SAFIRE ATR 42 French research aircraft, used to create set different levels input...
Abstract. Detailed measurements of radiation, atmospheric and aerosol properties were carried out in summer 2013 during the Aerosol Direct Radiative Impact on regional climate MEDiterranean region (ADRIMED) campaign framework Chemistry-Aerosol Mediterranean Experiment (ChArMEx) experiment. This study focusses characterization infrared (IR) optical direct radiative effects mineral dust, based three vertical profiles IR broadband narrowband radiation from airborne measurements, made...
Abstract. During the monsoon season, pollutants emitted by large coastal cities and biomass burning plumes originating from central Africa have complex transport pathways over southern West (SWA). The Dynamics–Aerosol–Chemistry–Cloud Interactions in (DACCIWA) field campaign has provided numerous dynamical chemical measurements around super-site of Savè Benin (≈185 km away coast), which allows quantification relative contribution advected pollutants. Through combination situ ground with...
Abstract. The evolution of the droplet size distribution (DSD) during fog life cycle remains poorly understood and progress is required to reduce uncertainty forecasts. To gain insights into physical processes driving microphysical properties, intensive field campaigns were conducted winters 2010–2013 at Instrumented Site for Atmospheric Remote Sensing Research (SIRTA) in a semi-urban environment southwest Paris city center monitor simultaneous variations properties their potential...
Abstract. Secondary organic aerosol (SOA) were generated from the ozonolysis of α-pinene in CESAM (French acronym for Experimental Multiphasic Atmospheric Simulation Chamber) simulation chamber. The SOA formation and aging studied by following their optical, hygroscopic chemical properties. optical properties investigated determining particle complex refractive index (CRI). hygroscopicity was quantified measuring effect relative humidity (RH) on size (size growth factor, GF) scattering...
Abstract. A new methodology for the determination of changes due to hygroscopic growth with relative humidity number size distribution and optical properties polydispersed aerosols is described. This method uses simulation chamber CESAM where aerosol particles can be investigated in situ by exposing them RH ranging from 0 100% approximately 1 h. In humidification used provide simultaneous information on RH-dependence particle corresponding scattering coefficient (σscat), that entire...
Abstract. A series of experiments was conducted in the CESAM (French acronym for Experimental Multiphasic Atmospheric Simulation Chamber) simulation chamber to investigate evolution physical and chemical properties secondary organic aerosols (SOAs) during different forcings. The present represent a first attempt comprehensively influence oxidative processing, photochemistry, diurnal temperature cycling upon SOA properties. SOAs generated from ozonolysis α-pinene were exposed under dry...
Abstract. As part of the Dynamics-Aerosol-Chemistry-Cloud Interactions in West Africa (DACCIWA) project, an airborne campaign was designed to measure a large range atmospheric constituents, focusing on effect anthropogenic emissions regional climate. The presented study details results French ATR42 research aircraft, which aimed characterize gas-phase, aerosol and cloud properties region during field carried out June/July 2016 combination with German Falcon 20 British Twin Otter aircraft....
Abstract Marine ecosystems are important drivers of the global climate system. They emit volatile species into atmosphere, involved in complex reaction cycles that influence lifetime greenhouse gases. Sea spray and marine biogenic aerosols affect Earth's by scattering solar radiation controlling cloud microphysical properties. Here we show larger than expected emissions butenes, three orders magnitude higher dimethyl sulfide, produced coastal part Benguela upwelling system, one most...
<strong class="journal-contentHeaderColor">Abstract.</strong> The complex vertical distribution of aerosols over coastal southern West Africa (SWA) is investigated using airborne observations and numerical simulations. Observations were gathered on 2 July 2016 offshore Ghana Togo, during the field phase Dynamics-Aerosol-Chemistry-Cloud Interactions in project. This was only flight conducted ocean which a downward-looking lidar operational. aerosol loading lower troposphere includes...