A5067135916- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Air Quality and Health Impacts
- Atmospheric aerosols and clouds
- Air Quality Monitoring and Forecasting
- Vehicle emissions and performance
- Advanced Aircraft Design and Technologies
- Methane Hydrates and Related Phenomena
- Climate variability and models
- Fire effects on ecosystems
- Spectroscopy and Laser Applications
- Meteorological Phenomena and Simulations
- Ionosphere and magnetosphere dynamics
- Advanced Measurement and Detection Methods
- Air Traffic Management and Optimization
- COVID-19 impact on air quality
- Geophysics and Gravity Measurements
- Radioactivity and Radon Measurements
- Risk Perception and Management
- Nuclear Physics and Applications
- Lightning and Electromagnetic Phenomena
- Aerospace and Aviation Technology
- Arctic and Antarctic ice dynamics
- Radioactive contamination and transfer
Laboratoire d'Aérologie
2016-2025
Centre National de la Recherche Scientifique
2016-2025
Université Toulouse III - Paul Sabatier
2016-2025
Université de Toulouse
2015-2024
Observatoire Midi-Pyrénées
2013-2024
Sorbonne Université
2024
Université de Versailles Saint-Quentin-en-Yvelines
2024
National Central University
2024
Météo-France
2024
Centre National pour la Recherche Scientifique et Technique (CNRST)
2012-2024
Tentative estimates, using three‐dimensional chemistry and transport models, have suggested small ozone increases in the upper troposphere resulting from current aircraft emissions, but also concluded to significant deficiencies today's models need improve them through comparison with extended data sets. The Measurement of Ozone Water Vapor by Airbus In‐Service Aircraft (MOZAIC) program was initiated 1993 European scientists, manufacturers, airlines collect experimental data. Its goal is...
The rate at which ozone is increasing in the troposphere uncertain due to lack of accurate long‐term measurements. Old measurements obtained Pic du Midi Observatory (3000 m high, southwestern France) were recently rediscovered. Four sets data available this station are presented herein: (1) 1874–1881 and (2) 1881–1909 by Schönbein method (3) 1982–1984 (4) 1990–1993 UV absorption analyzers. results show an increase a factor 5 since beginning twentieth century, corresponding exponential 1.6%...
The European Research Infrastructure IAGOS (In-service Aircraft for a Global Observing System) operates global-scale monitoring system atmospheric trace gases, aerosols and clouds utilising the existing global civil aircraft. This new infrastructure builds on heritage of former research projects MOZAIC (Measurement Ozone Water Vapour Airbus In-service Aircraft) CARIBIC (Civil Regular Investigation Atmosphere Based an Instrument Container). continues within acts as important airborne...
Abstract. Ozone (O3) profiles recorded over Beijing from 1995 to 2005 by the Measurement of and Water Vapor Airbus In-Service Aircraft (MOZAIC) program were analyzed provide a first climatology tropospheric O3 North China Plains (NCPs), one most populated polluted regions in China. A pooled method was adopted data analysis reduce influence irregular sampling frequency. The shows seasonal vertical distribution typical mid-latitude locations Northern Hemisphere, but has higher daytime...
Recent aircraft observations show that tropospheric ozone increased above many Northern Hemisphere regions since the mid-1990s.
Extracting globally representative trend information from lower tropospheric ozone observations is extremely difficult due to the highly variable distribution and interannual variability of ozone, ongoing shift precursor emissions high latitudes low latitudes. Here we report surface trends at 27 distributed remote locations (20 in Northern Hemisphere, 7 Southern Hemisphere), focusing on continuous time series that extend present back least 1995. While these sites are only less than 25%...
Automatic ozone measuring devices have been operating continuously on board the five long‐range aircraft of Measurement Ozone and Water Vapor by Airbus In‐Service Aircraft (MOZAIC) program since September 1994. This paper presents main characteristics system procedures followed to ensure its accurate calibration over long durations. accuracy was estimated at ±[2 ppbv + 2%], but much better in‐flight levels were in fact observed: average discrepancy (between different devices) ranging from 1...
Using both thermal infrared (TIR) and near (NIR) channels of MOPITT (Measurements Pollution in the Troposphere) on EOS‐Terra, we demonstrate first coincident multispectral retrievals carbon monoxide (CO) from space. Exploiting TIR NIR has been possible due to recent progress characterizing channel radiance errors. This allowed us trade off sensitivity surface CO for larger random errors combined retrieval. By examining retrieval diagnostics such as DFS (degrees freedom signal) averaging...
Abstract. The AMMA (African Monsoon Multidisciplinary Analysis) program is dedicated to providing a better understanding of the West African monsoon and its influence on physical, chemical biological environment regionally globally, as well relating variability this system issues health, water resources, food security demography for nations. Within framework, an intensive field campaign took place during summer 2006 document specific processes weather systems at various key stages season....
Abstract. The MOZAIC programme collects ozone and water vapour data using automatic equipment installed on board five long-range Airbus A340 aircraft flying regularly all over the world since August 1994. Those measurements made between September 1994 1996 allowed first accurate climatology at 9–12 km altitude to be generated. seasonal variability of tropopause height has always provided a problem when constructing climatologies in this region. To remove any signal from synoptic scale we...
This article presents the In-service Aircraft of a Global Observing System (IAGOS) developed for operations on commercial long-range Airbus aircraft (A330/A340) monitoring atmospheric composition. IAGOS is continuation former Measurement OZone and water vapour airCraft (MOZAIC) programme (1994–2014) with five operated by European airlines over 20 yr. MOZAIC has provided unique scientific database used worldwide community. In MOZAIC, aims to equip fleet up around world decades. started in...
Abstract. In situ measurements in the upper troposphere–lower stratosphere (UTLS) have been performed framework of European research infrastructure IAGOS (In-service Aircraft for a Global Observing System) ozone since 1994 and carbon monoxide (CO) 2002. The flight tracks cover wide range longitudes northern extratropics, extending from North American western coast (125° W) to eastern Asian (135° E) more recently over Pacific Ocean. Several tropical regions are also sampled frequently, such...
Abstract This study quantifies the association between COVID‐19 economic downturn and 2020 tropospheric ozone anomalies above Europe western North America, their impact on long‐term trends. Anomaly detection for an atmospheric time series is usually carried out by identifying potentially aberrant data points relative to climatological values. However, detecting from sparsely sampled ozonesonde profiles (once per week at most sites) challenging due ozone's high temporal variability. We first...
Abstract. Quantification and attribution of long-term tropospheric ozone trends are critical for understanding the impact human activity climate change on atmospheric chemistry but also challenged by limited coverage observations in free troposphere where has higher production efficiency radiative potential compared to that at surface. In this study, we examine observed trends, their attributions, impacts from 1995–2017 using aircraft In-service Aircraft a Global Observing System database...
We examine the ozone production from boreal forest fires based on a case study of wildfires in Alaska and Canada summer 2004. The model simulations were performed with chemistry transport model, MOZART‐4, evaluated by comparison comprehensive set aircraft measurements. In analysis we use measurements carbon monoxide (CO) (O 3 ) at PICO‐NARE station located Azores within pathway North American outflow. modeled mixing ratios used to test robustness enhancement ratio ΔO /ΔCO (defined as excess...
The most extensive set of free tropospheric ozone measurements ever compiled across midlatitude North America was measured with daily ozonesondes, commercial aircraft and a lidar at 14 sites during July‐August 2004. model estimated stratospheric subtracted from all profiles, leaving residual ozone. On average the upper troposphere above eastern contained 15 ppbv more than polluted layer between surface 2 km sea level. Lowest values in were found two upwind California. 16 three sites,...
Compact airborne humidity sensing devices using capacitive sensors are employed on board in‐service aircraft to measure water vapor concentrations in the troposphere up 13 km altitude. The individually calibrated before onboard installation. After every 500 flight hours, each sensor is an environmental simulation chamber under typical middle/upper tropospheric conditions. A Lyman‐Alpha fluorescence hygrometer used as reference instrument. Preflight and postflight calibration of flown agreed...
Abstract. We present the configuration of Météo-France Chemistry and Transport Model (CTM) MOCAGE-Climat that will be dedicated to study chemistry climate interactions. is a state-of-the-art CTM simulates global distribution ozone its precursors (82 chemical species) both in troposphere stratosphere, up mid-mesosphere (~70 km). Surface processes (emissions, dry deposition), convection, scavenging are explicitly described model has been driven by ECMWF operational analyses period 2000–2005,...
Abstract. We present airborne measurements of carbon dioxide (CO2), monoxide (CO), ozone (O3), equivalent black (EBC) and ultra fine particles over North-Eastern Siberia in July 2008 performed during the YAK-AEROSIB/POLARCAT experiment. During a "golden day" (11 2008) number biomass burning plumes were encountered with CO mixing ratio enhancements up to 500 ppb relative background 90 ppb. Number concentrations aerosols size range 3.5–200 nm peaked at 4000 cm−3 EBC content reached 1.4 μg m−3....
Abstract. We analyze ozone observations recorded over Equatorial Africa between April 1997 and March 2003 by the MOZAIC programme, providing first climatology deriving from continental in-situ data this region. Three-dimensional streamlines strongly suggests connections characteristics of monthly mean vertical profiles, most persistent circulation patterns in troposphere (on a basis) such as Harmattan, African Easterly Jet, Trades regions precursors emissions biomass burning. During burning...
Abstract. The vertical distribution and seasonal variation of water vapour volume mixing ratio (H2O VMR), relative humidity with respect to ice (RHice) particularly regions ice-supersaturated air masses (ISSRs) in the extratropical upper troposphere lowermost stratosphere are investigated at northern mid-latitudes over eastern North American, Atlantic European for period 1995 2010. Observation data originate from regular continuous long-term measurements on board instrumented passenger...
Abstract We investigate the contributions of emission changes from 10 world regions, as well global methane concentration change, on tropospheric ozone burden change 1980 to 2010. The modeled has increased by 28.1 Tg, with 26.7% (7.5 Tg) this attributed increase. Southeast Asia (5.6 and South (4.0) contribute comparably East (5.6), even though NO x increases in each region are less than one‐third those Asia, highlighting greater sensitivity these regions. Emission decreases North America,...
Abstract. The In-service Aircraft for a Global Observing System (IAGOS) is European research infrastructure that equips the Airbus A340/330 with system monitoring atmospheric composition. IAGOS instruments have three different configurations: IAGOS-Core, – Measurement of Ozone and Water Vapor by In Service (IAGOS-MOZAIC) Civil Regular Investigation atmosphere Based on an Instrument Container (IAGOS-CARIBIC). Since 1994, there been total 17 aircraft equipped. this study, we perform...