A5080610475- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Ionosphere and magnetosphere dynamics
- Atmospheric aerosols and clouds
- Spectroscopy and Laser Applications
- Climate variability and models
- Infrared Target Detection Methodologies
- Aerospace Engineering and Energy Systems
- Calibration and Measurement Techniques
- Solar and Space Plasma Dynamics
- Lightning and Electromagnetic Phenomena
- Meteorological Phenomena and Simulations
- Spaceflight effects on biology
- Impact of Light on Environment and Health
- Remote-Sensing Image Classification
- Spectroscopy and Chemometric Analyses
- Laser-induced spectroscopy and plasma
- Magneto-Optical Properties and Applications
- Inorganic Fluorides and Related Compounds
- Laser Design and Applications
- Advanced Optical Sensing Technologies
- Methane Hydrates and Related Phenomena
- Spacecraft Design and Technology
- Bauxite Residue and Utilization
Centre National de la Recherche Scientifique
2011-2023
Université Clermont Auvergne
1994-2023
Observatoire de Physique du Globe de Clermont-Ferrand
2019-2023
Laboratoire de Physique et Chimie de l’Environnement et de l’Espace
2003-2022
Laboratoire atmosphères, milieux, observations spatiales
2021
Sorbonne Université
2021
Laboratoire de Météorologie Physique
2019-2020
Université d'Orléans
2009-2020
Centre National d'Études Spatiales
2019
Laboratoire Chimie de l'Environnement
2009-2015
Abstract. For the last 25 years, CO-PDD (Cézeaux-Aulnat-Opme-puy de Dôme) has evolved to become a full instrumented platform for atmospheric research. It received credentials as national observing in France and is internationally recognized global station GAW (Global Atmosphere Watch) network. reference site of European research infrastructures ACTRIS (Aerosol Cloud Trace gases Research Infrastructure) ICOS (Integrated Carbon Observing System). The located on top puy Dôme mountain (1465 m...
Abstract. During several balloon flights inside the Arctic polar vortex in early 2003, unusual trace gas distributions were observed, which indicate a strong influence of mesospheric air stratosphere. The tuneable diode laser (TDL) instrument SPIRALE (Spectroscopie Infra-Rouge par Absorption de Lasers Embarqués) measured unusually high CO values (up to 600 ppb) on 27 January at about 30 km altitude. cryosampler BONBON sampled masses with very molecular Hydrogen, extremely low SF6 and...
Abstract. The Atmospheric Chemistry Experiment (ACE) satellite was launched on 12 August 2003. Its two instruments measure vertical profiles of over 30 atmospheric trace gases by analyzing solar occultation spectra in the ultraviolet/visible and infrared wavelength regions. reservoir HNO3, ClONO2, N2O5 are three key species provided primary instrument, ACE Fourier Transform Spectrometer (ACE-FTS). This paper describes ACE-FTS version 2.2 data products, including update, for presents...
Abstract. Vertical profiles of NO2 and NO have been obtained from solar occultation measurements by the Atmospheric Chemistry Experiment (ACE), using an infrared Fourier Transform Spectrometer (ACE-FTS) (for NO2) ultraviolet-visible-near-infrared spectrometer, MAESTRO (Measurement Aerosol Extinction in Stratosphere Troposphere Retrieved Occultation). In this paper, quality ACE-FTS version 2.2 1.2 data are assessed other (HALOE, SAGE II, III, POAM SCIAMACHY), stellar (GOMOS), limb (MIPAS,...
The balloonborne SPIRALE (a French acronym for infrared absorption spectroscopy by tunable diode lasers) instrument has been developed in situ measurements of several tracer and chemically active species the stratosphere. Laser takes place an open Herriott multipass cell located under balloon gondola, with six lead salt lasers as light sources. One mirror is at extremity a deployable mast 3.5 m below enabling measurement very low abundance throughout long path (up to 544 m). Three successful...
Abstract. The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) instrument was launched aboard the environmental satellite ENVISAT into its sun-synchronous orbit on 1 March 2002. short-lived species NO2 is one of key target products MIPAS that are operationally retrieved from limb emission spectra measured in stratosphere and mesosphere. Within validation activities, a large number independent observations balloons, satellites ground-based stations have been compared to...
Abstract. The ENVISAT validation programme for the atmospheric instruments MIPAS, SCIAMACHY and GOMOS is based on a number of balloon-borne, aircraft, satellite ground-based correlative measurements. In particular activities scientists were coordinated by ESA within Stratospheric Aircraft Balloon Campaign or ESABC. As part series similar papers other species [this issue] in parallel to contribution individual teams, present paper provides synthesis comparisons performed between MIPAS CH4 N2O...
Abstract. Nitric acid (HNO3) is one of the key products that are operationally retrieved by European Space Agency (ESA) from emission spectra measured Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) onboard ENVISAT. The product version 4.61/4.62 observation period between July 2002 and March 2004 validated comparisons with a number independent observations ground-based stations, aircraft/balloon campaigns, satellites. Individual HNO3 profiles ESA MIPAS level-2 show good...
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...
A new version of the PROGRA2 instrument, dedicated to measuring polarization phase function various kinds solid particles, allows obtaining maps and brightness with a spatial resolution few tens micrometers. The measurements are conducted in microgravity during parabolic flights ensure random distribution orientation particles. results first two sessions presented. Comparison between Mie theory modeling for glass spheres shows that instrument works well accurate can be obtained even at small...
Ozone loss in the lower and middle stratosphere spring summer, particular over polar regions, is driven mainly by halogens nitrogen oxides (NO x ). Whereas stratospheric chlorine levels are expected to decrease future, role of NO for O 3 budget a changing climate not well quantified. Here we combine satellite measurements model simulations diagnose accumulated during winter 2002–2003 Arctic stratosphere. We show that strongly disturbed warmings, processes can significantly overlap within...
CH 4 and N 2 O measured by the balloon‐borne Spectromètre Infra Rouge pour l'Étude de l'Atmosphère par Diodes Laser Embarquées (SPIRALE) instrument at midlatitude on October 2002 in polar region 21 January 2003 are used to study vertical structure of stratosphere. SPIRALE utilizes a direct absorption technique using tunable diodes laser midinfrared. For two flights, detailed structures with extents less than 1 km nonmonotonic profiles observed. Measured have been compared correlation curves...
Abstract. The Odin satellite carries two instruments capable of determining stratospheric ozone profiles by limb sounding: the Sub-Millimetre Radiometer (SMR) and UV-visible spectrograph OSIRIS (Optical Spectrograph InfraRed Imager System) instrument. A large number measurements were performed during six years from November 2001 to present. This dataset is here used make quantitative comparisons with in order assess quality Odin/SMR measurements. In a first step, we compare Swedish SMR...
Abstract This study focuses on the ability of ERA-Interim to represent wind variability in middle atmosphere. The originality proposed approach is that measurements are deduced from trajectories zero-pressure balloons can reach high-stratospheric altitudes. These mainly used carry large scientific payloads. launched above Esrange, Sweden, and Teresina, Brazil, 2000 2011 were deduce zonal meridional components (by considering balloon as a perfect tracer at high altitude). Collected data cover...
Recent theories of solid polar stratospheric clouds (PSCs) formation have shown that particles could remain liquid down to 3 K or 4 below the ice frost point. Such temperatures are rarely reached in Arctic stratosphere at synoptic scale, but nevertheless, PSCs frequently observed. Mesoscale processes such as mountain‐induced gravity waves be responsible for their formation. In this paper, a microphysical‐chemical Lagrangian model (MiPLaSMO) and mountain wave (NRL/MWFM) used interpret...
Ozone‐tracer relations are used to quantify chemical ozone loss in the polar vortices. The underlying assumptions for application of this technique were extensively discussed recent years. However, impact intrusions mesospheric air into stratosphere have on estimates based ozone‐tracer has not hitherto been studied. Here, we revisit observations an intrusion down altitudes ∼25 km (∼600 K potential temperature) Arctic vortex 2003. was identified three balloon profiles January and March 2003...
Large disagreements between measured and simulated NO 2 have been observed several times in the Arctic polar vortex. Here we report on comparison of two sets nighttime balloonborne measurements couple (OClO, ) with Lagrangian model outputs order to study interactions halogen nitrogen species. Those were characterized by simultaneous presence significant amounts both are modeled . Very surprisingly, good agreement can be achieved for OClO spite supposed strong coupling these The only species...
Abstract. In this paper we study the impact of modelling N2O on simulation NO2 and HNO3 by comparing in situ vertical profiles measured at mid-latitudes with results Reprobus 3-D CTM (Three-dimensional Chemical Transport Model) computed kinetic parameters from JPL recommendation 2002. The analysis profile shows particular features indicating different air mass origins. N2O, are not satisfyingly reproduced when using current 6-hourly ECMWF operational analysis. Improving transport allows us...
Abstract. HIBISCUS was a field campaign for investigating the impact of deep convection on Tropical Tropopause Layer (TTL) and Lower Stratosphere, which took place during Southern Hemisphere summer in February–March 2004 State São Paulo, Brazil. Its objective to provide set new observational data meteorology, tracers horizontal vertical transport, water vapour, clouds, chemistry tropical UT/LS from balloon observations at local scale over land convective area, as well global using...
Nighttime remote‐sensing balloon observations conducted by the SALOMON instrument in arctic polar vortex January 2006 reveal high amounts of stratospheric NO 2 lower stratosphere similarly to previously published profiles. concentration enhancements are also present vertical profiles observed GOMOS on board Envisat satellite and obtained coincidently measurements. Such quantities not situ SPIRALE similar geophysical conditions. While OClO acceptably reproduced Chemistry Transport Model (CTM)...
The balloonborne microRADIBAL instrument is a radiometer that measures the radiance and polarization of sunlight scattered by atmosphere, gas, aerosols in horizontal plane near‐infrared range. It was launched from Esrange, Sweden, on 25 January 2000 framework Third European Stratospheric Experiment Ozone (THESEO) campaign, performed measurements vicinity large polar stratospheric cloud (PSC). provide diagrams versus scattering angle at several altitudes. aerosol signature, derived...
Abstract. Volume mixing ratio (vmr) vertical profiles of hydrogen chloride (HCl) are retrieved from in situ measurements performed by a balloon-borne infrared tunable diode laser absorption spectrometer (SPIRALE) during two balloon flights the tropics (Teresina, Brazil, 5.1° S–42.9° W) June 2005 and 2008. HCl obtained 15 to 31 km presented analysed estimate contribution very short-lived substances (VSLS) total stratospheric chlorine. Both these agree well with each other, estimated overall...
Simultaneous measurements of NO 3 , along with those O 2 and aerosol extinction coefficient, have been performed during the night by AMON instrument since 1992 at high midlatitudes SALOMON 1998 midlatitude. Observations are conducted using stellar lunar occultation methods, respectively. Vertical profiles obtained after inversion optical depth spectra recorded from 650 to 670 nm, including 662‐nm absorption line. Five midlatitude two latitude presented. Comparisons a box model constrained...
Abstract. The micro-SDLA balloonborne diode laser spectrometer was flown twice from Bauru (22° S, Brazil) in February 2004 during HIBISCUS to yield situ H2O measurements the Upper Troposphere (UT) and Lower Stratosphere (LS) particular Tropical Tropopause Layer (TTL). overall TTL found warmer (with a subsaturated cold point near –79°C) LS moister compared former obtained tropical oceanic conditions. use of specific balloons with slow descent, combined high-resolution sensor, allowed us...
Abstract. Volume mixing ratio (vmr) vertical profiles of hydrogen chloride (HCl) are retrieved from in situ measurements performed by a balloon-borne infrared tunable diode laser absorption spectrometer (SPIRALE) during two balloon flights the tropics (Teresina, Brazil, 5.1° S–42.9° W) at three year interval June 2005 and 2008. HCl obtained 15.0 to 31.0 km presented analysed estimate contribution very short-lived substances (VSLS) total stratospheric chlorine. Both these globally agree well...