A5001181102- Atmospheric Ozone and Climate
- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Meteorological Phenomena and Simulations
- Ionosphere and magnetosphere dynamics
- Air Quality and Health Impacts
- Precipitation Measurement and Analysis
- Air Quality Monitoring and Forecasting
- Geophysics and Gravity Measurements
- Calibration and Measurement Techniques
- Tropical and Extratropical Cyclones Research
- Methane Hydrates and Related Phenomena
- Advanced Measurement and Detection Methods
- Spectroscopy and Laser Applications
- Advanced Optical Sensing Technologies
- Fire effects on ecosystems
- Geomagnetism and Paleomagnetism Studies
- Geochemistry and Geologic Mapping
- Remote Sensing and LiDAR Applications
- Vehicle emissions and performance
- Geological Modeling and Analysis
- Maritime Navigation and Safety
- Climate Change Communication and Perception
European Organisation for the Exploitation of Meteorological Satellites
2022-2024
Institute of Atmospheric Sciences and Climate
2012-2021
National Research Council
2010-2021
National Academies of Sciences, Engineering, and Medicine
2009-2013
Centre National de la Recherche Scientifique
1998-2002
Centre de Gestion Scientifique
1999
Different definitions for estimating the degree of changes in signal polarization measured by lidar measurements are used both to detect presence nonspherical aerosol particles and estimate their shape density. Our aim is provide a tool calculation interpretation that due backscatter technique. An overview several techniques calculate linear depolarization from two-channel given. Advantages disadvantages each method analyzed when we apply them on vertical profile. Systematic errors also...
Abstract The transport of air from the planetary boundary layer (PBL) into Asian Summer Monsoon anticyclone is investigated using backward trajectories initiated within anti‐cyclone at 100 mb and 200 during August 2011. Transport occurs through a well‐defined conduit centered over southern Tibetan plateau, where convection lofts parcels anticyclone. conduit, as dynamical feature, distinct Thus, while influences upper troposphere lower stratosphere, it does not by itself define pipeline that...
Abstract. During June, July and August 2006 five aircraft took part in a campaign over West Africa to observe the aerosol content chemical composition of troposphere lower stratosphere as African Monsoon Multidisciplinary Analysis (AMMA) project. These are first such measurements this region during monsoon period. In addition providing an overview tropospheric composition, paper provides description measurement strategy (flights performed, instrumental payloads, wing-tip comparisons) points...
Abstract. In response to global warming, the Brewer–Dobson circulation in stratosphere is expected accelerate and mean transport time of air along this decrease. This would imply a negative stratospheric age trend, i.e. an parcel need less travel from tropopause any point stratosphere. Age as inferred tracer observations, however, shows zero positive trends northern mid-latitude zonally asymmetric patterns. Using satellite observations model calculations we show that observed latitudinal...
Abstract. In situ measurements of ice crystal size distributions in tropical upper troposphere/lower stratosphere (UT/LS) clouds were performed during the SCOUT-AMMA campaign over West Africa August 2006. The cloud properties measured with a Forward Scattering Spectrometer Probe (FSSP-100) and Cloud Imaging (CIP) operated aboard Russian high altitude research aircraft M-55 Geophysica mission base Ouagadougou, Burkina Faso. A total 117 particle obtained from vicinity Mesoscale Convective...
Abstract. A multi-platform field measurement campaign involving aircraft and balloons took place over West Africa between 26 July 25 August 2006, in the frame of concomitant AMMA Special Observing Period SCOUT-O3 African tropical activities. Specifically aiming at sampling upper troposphere lower stratosphere, high-altitude research M55 Geophysica was deployed Ouagadougou (12.3° N, 1.7° W), Burkina Faso, conjunction with German D-20 Falcon, while a series stratospheric sonde flights were...
Abstract. This work investigates the variability of ozone (O3), carbon monoxide (CO) and equivalent black (BC) at Italian Climate Observatory "O. Vittori" (ICO-OV), part Mt. Cimone global GAW-WMO station (Italy). For this purpose, ICO-OV observations carried out in period January 2007–June 2009, have been analyzed correlated with outputs FLEXPART Lagrangian dispersion model to specifically evaluate influence biomass burning (BB) anthropogenic emissions younger than 20 days. During...
Abstract. Vertical profiles of aerosol particle optical properties were explored in a case study near the San Pietro Capofiume (SPC) ground station during PEGASOS Po Valley campaign summer 2012. A Zeppelin NT airship was employed to investigate effect dynamics planetary boundary layer at altitudes between ∼ 50 and 800 m above ground. Determined included size distribution, hygroscopic growth factor, effective index refraction light absorption coefficient. The first three parameters used...
Abstract. Pollutant plumes with enhanced concentrations of trace gases and aerosols were observed over the southern coast West Africa during August 2006 as part AMMA wet season field campaign. Plumes both in mid upper troposphere. In this study we examined origin these pollutant plumes, their potential to photochemically produce ozone (O3) downwind Atlantic Ocean. Their possible contribution O3 maximum is also discussed. Runs using BOLAM mesoscale model including biomass burning carbon...
Abstract. High levels of trace gas (O3 and CO) aerosol (BC, fine coarse particle volumes), as well high scattering coefficient (σp) values, were recorded at the regional GAW-WMO station Mt. Cimone (CMN, 2165 m a.s.l., Italy) during period 26–30 August 2007. Analysis air-mass circulation, chemical characterization enhancement ratios (ERs), showed that O3 likely linked to (i) transport anthropogenic pollution from northern Italy, (ii) advection air masses rich in mineral dust biomass burning...
There is a growing demand to train Earth Observation (EO) data users in how access and use existing upcoming data. A promising tool for data-related training computational notebooks, which are interactive web applications that combine text, code output. Here, we present the Learning Tool Python (LTPy), course (based on Jupyter notebooks) atmospheric composition LTPy consists of more than 70 notebooks has taught over 1000 EO so far, whose feedback overall positive. We adapted five guiding...
The Global Ozone Monitoring Experiment 2 (GOME-2) and the TROPOspheric Instrument (TROPOMI) are two significant satellite-based instruments dedicated to monitoring Earth’s atmosphere. GOME-2, part of MetOp platform, has been operational since 2006, was originally developed monitor ozone layer in However, its onboard spectrometer can also detect pollutant gases, including NO2, which we will use as an initial example this study.GOME-2 spatial resolution is very coarse: a single data...
Polar stratospheric clouds (PSCs) which do not fit into the standard type Ia/Ib scheme were measured by airborne lidar OLEX (Ozone Lidar Experiment) on board Deutsches Zentrum für Luft‐ und Raumfhart (DLR) Falcon during Airborne Experiment and clouds, Leewaves, Chemistry Aerosol Transport (APE‐POLECAT) campaign. In contrast, classification is satisfied almost all observations for four winters at Ny Ålesund, Spitsbergen, one of most comprehensive data sets ground station measurements...
Abstract. The EU HIBISCUS project consisted of a series field campaigns during the intense convective summers in 2001, 2003 and 2004 State São Paulo Brazil. Its objective was to investigate impact deep convection on Tropical Tropopause Layer (TTL) lower stratosphere by providing new set observational data meteorology, tracers horizontal vertical transport, water vapour, clouds, chemistry tropical Upper Troposphere/Lower Stratosphere (UT/LS). This achieved using short duration research...
Abstract. In this work, we have studied the seasonal and inter-annual variability of aerosol vertical distribution over Sahelian Africa for years 2006, 2007 2008, characterizing different kind aerosols present in atmosphere terms their optical properties observed by ground-based satellite instruments, sources searched using trajectory analysis. This study combines data acquired three micro lidar systems located Banizoumbou (Niger), Cinzana (Mali) M'Bour (Senegal) framework African Monsoon...
Abstract. Pollution aerosols strongly influence the composition of Western Mediterranean basin, but at present little is known on their optical properties. We report in this study situ observations single scattering albedo (ω) pollution aerosol plumes measured over basin during TRAQA (TRansport and Air QuAlity) airborne campaign summer 2012. Cases export from different source regions around altitudes between ∼ 160 3500 m above sea level were sampled flights. Data show a large variability ω,...
Abstract. Trace gas and aerosol data collected in the tropical tropopause layer (TTL) between 12–18.5 km by M55 Geophysica aircraft as part of SCOUT-AMMA campaign over West Africa during summer monsoon August 2006 have been analysed terms their air mass origins. Analysis domain filling back trajectories arriving Africa, specific region flights, showed that flights were generally representative masses first 2 weeks August, 2006. Air originating from mid-latitude lower stratosphere was...
A new automated small size lidar system (microlidar or MULID) has been developed and employed to perform aerosol measurements since March 2010 at Ny Ålesund (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mrow><mml:mn>78.9</mml:mn></mml:mrow><mml:mo>°</mml:mo></mml:msup><mml:mtext>N</mml:mtext></mml:mrow></mml:math>,<mml:math...
Abstract. The case study presented here focuses on the life cycle of clouds in anvil region a tropical deep convective system. During SCOUT-O3 campaign from Darwin, Northern Australia, Hector storm system has been probed by Geophysica high-altitude aircraft. Clouds were observed situ particle probes, backscatter sonde, and miniature lidar. Additionally, aerosol number concentrations have measured. On 30 November 2005 double flight took place was throughout its developing, mature, dissipating...
Abstract A coupled aerosol‐atmosphere‐ocean‐sea ice climate model is used to explore the interaction between aerosols and Indian summer monsoon precipitation on seasonal‐to‐interannual time scales. Results show that when increased aerosol loading found Himalayas slopes in premonsoon period (April–May), intensification of early rainfall over India low‐level westerly flow follow, agreement with elevated‐heat‐pump mechanism. The increase during season has a cooling effect land surface. In same...
Abstract. This work quantifies the spatial distribution of different aerosol types, their seasonal variability and sources.The analysis four years CALIOP (Cloud–Aerosol LIdar with Orthogonal Polarization) vertically resolved data allows identification patterns desert dust carbonaceous particles in atmospheric layers. Clusters Lagrangian back trajectories highlight transport pathways from source regions during dusty spring season. The shows a prevalence dust; at low heights it occurs...
Observations within two polar stratospheric clouds (PSCs) of aerosol scattering and size‐resolved concentration were compared to infer the index refraction PSC particles. The observations completed in situ with balloon‐borne counters a laser scatterometer (692, 830 nm) remotely an ozone (308, 353 Rayleigh (532, 1064 lidar. A Monte Carlo analysis, accounting for errors individual measurements, indicates comparison method has precision ±0.03 range 1.30–1.60. Measurements from all instruments...
Abstract The atmospheric composition of West Africa reflects the interaction various dynamical and chemical systems (i.e. biogenic, urban, convective long‐range transport) with signatures from local to continental scales. Recent measurements performed during African Monsoon Multidisciplinary Analyses (AMMA) observational periods in 2005 2006 provide new data which has allowed insight into processes within these that control distribution ozone its precursors. Using recently published results,...
Abstract. We present the analysis of impact convection on composition tropical tropopause layer region (TTL) in West-Africa during AMMA-SCOUT campaign. Geophysica M55 aircraft observations water vapor, ozone, aerosol and CO2 August 2006 show perturbed values at altitudes ranging from 14 km to 17 (above main convective outflow) satellite data indicates that air detrainment is likely have originated cloud east flights. Simulations BOLAM mesoscale model, nudged with infrared radiance...
Abstract. An FSSP-100 Optical Particle Counter designed to count and size particles in the micron range a backscattersonde that measures in-situ particle optical properties such as backscatter depolarization ratio, are part of payload high altitude research aircraft M55 Geophysica. This was deployed tropical field campaigns Bauru, Brasil (TROCCINOX, 2004) Darwin, Australia (SCOUT-Darwin, 2005) Ouagadougou, Burkina Faso (SCOUT-AMMA, 2006). In those occasions, measurements distributions within...