A5013234828- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Ionosphere and magnetosphere dynamics
- Planetary Science and Exploration
- Atmospheric aerosols and clouds
- Air Quality Monitoring and Forecasting
- Climate variability and models
- Astro and Planetary Science
- Calibration and Measurement Techniques
- Meteorological Phenomena and Simulations
- Ocean Acidification Effects and Responses
- Spacecraft Design and Technology
- Spectroscopy and Laser Applications
- Geophysics and Gravity Measurements
- Solar and Space Plasma Dynamics
- Water Quality Monitoring and Analysis
- Space Exploration and Technology
- Vehicle emissions and performance
- Space Satellite Systems and Control
- Aerospace Engineering and Energy Systems
- Astronomical Observations and Instrumentation
- Impact of Light on Environment and Health
- Underwater Acoustics Research
- Spacecraft Dynamics and Control
Laboratoire atmosphères, milieux, observations spatiales
2013-2023
Université de Versailles Saint-Quentin-en-Yvelines
2010-2023
Institut Pierre-Simon Laplace
2000-2023
Sorbonne Université
2010-2023
Centre National de la Recherche Scientifique
2013-2023
Laboratoire Printemps
2010-2023
Université Paris-Saclay
2018-2023
Fundación Juan March
2023
Université Paris Cité
2011-2013
Aeroconseil (France)
1994-2008
Abstract. This paper reports on consolidated ground-based validation results of the atmospheric NO2 data produced operationally since April 2018 by TROPOspheric Monitoring Instrument (TROPOMI) board ESA/EU Copernicus Sentinel-5 Precursor (S5P) satellite. Tropospheric, stratospheric, and total column from S5P are compared to correlative measurements collected from, respectively, 19 Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS), 26 Network for Detection Atmospheric...
Abstract. In October 2017, the Sentinel-5 Precursor (S5P) mission was launched, carrying TROPOspheric Monitoring Instrument (TROPOMI), which provides a daily global coverage at spatial resolution as high 7 km × 3.5 and is expected to extend European atmospheric composition record initiated with GOME/ERS-2 in 1995, enhancing our scientific knowledge of processes its unprecedented resolution. Due ongoing need understand monitor recovery ozone layer, well evolution tropospheric pollution, total...
We review the standard nitrogen dioxide (NO 2 ) data product (Version 1.0.), which is based on measurements made in spectral region 415–465 nm by Ozone Monitoring Instrument (OMI) NASA Earth Observing System‐Aura satellite. A number of ground‐ and aircraft‐based have been used to validate product's three principal quantities: stratospheric, tropospheric, total NO column densities under nearly or completely cloud‐free conditions. The validation OMI complicated a factors, greatest that...
The evolution of the aerosols in tropical stratosphere since beginning Cloud‐Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) mission June 2006 is investigated using with Orthogonal Polarization (CALIOP) lidar data. It shown that current operational calibration requires adjustment tropics. Indeed, on basis assumption pure Rayleigh scattering between 30 34 km leads to an average underestimation ratio by 6% because significant amount up 35 altitude tropics, contrast...
Abstract. This paper presents extensive {bias determination} analyses of ozone observations from the Atmospheric Chemistry Experiment (ACE) satellite instruments: ACE Fourier Transform Spectrometer (ACE-FTS) and Measurement Aerosol Extinction in Stratosphere Troposphere Retrieved by Occultation (ACE-MAESTRO) instrument. Here we compare latest data products ACE-FTS ACE-MAESTRO with coincident nearly 20 satellite-borne, airborne, balloon-borne ground-based instruments, analysing volume mixing...
Abstract. Accurate long-term monitoring of total ozone is one the most important requirements for identifying possible natural or anthropogenic changes in composition stratosphere. For this purpose, NDACC (Network Detection Atmospheric Composition Change) UV-visible Working Group has made recommendations improving and homogenizing retrieval columns from twilight zenith-sky visible spectrometers. These instruments, deployed all over world about 35 stations, allow measuring twice daily with...
Abstract. This paper assesses the quality of IASI (Infrared Atmospheric Sounding Interferometer)/Metop-A (IASI-A) and IASI/Metop-B (IASI-B) ozone (O3) products (total partial O3 columns) retrieved with Fast Optimal Retrievals on Layers for Ozone (FORLI-O3; v20151001) software 9 years (2008–July 2017) through an extensive intercomparison validation exercise using independent observations (satellite, ground-based ozonesonde). Compared previous version FORLI-O3 (v20140922), several improvements...
Between November 1999 and April 2000, two major field experiments, the Stratospheric Aerosol Gas Experiment (SAGE) III Ozone Loss Validation (SOLVE) Third European on (THESEO 2000), collaborated to form largest campaign yet mounted study Arctic ozone loss. This international involved more than 500 scientists from over 20 countries. These made measurements across high middle latitudes of Northern Hemisphere. The main scientific aims SOLVE/THESEO 2000 were (1) processes leading loss in vortex...
Abstract. The possible impact of deep convective overshooting over land has been explored by six simultaneous soundings water vapour, particles and ozone in the lower stratosphere next to Mesoscale Convective Systems (MCSs) during monsoon season West Africa Niamey, Niger August 2006. vapour measurements were carried out using a fast response FLASH-B Lyman-alpha hygrometer. high vertical resolution observations instrument show presence accumulation enhanced layers between tropopause at 370 K...
Abstract. A long-term ozone loss time series is necessary to understand the evolution of in Antarctica. Therefore, we construct using ground-based, satellite and bias-corrected multi-sensor reanalysis (MSR) data sets for period 1989–2010. The trends over 1979–2010 are also estimated further elucidate its wake decreasing halogen levels stratosphere. Our analysis with ground-based observations shows that average Antarctic about −33 −50% (−90 −155 DU (Dobson Unit)) 1989–1992, then stayed at...
Abstract. This paper presents an extensive intercomparison and validation for the ozone (O3) product measured by two Infrared Atmospheric Sounding Interferometers (IASIs) launched on board MetOp-A MetOp-B satellites in 2006 2012 respectively. IASI O3 total columns vertical profiles obtained from Fast Optimal Retrievals Layers (FORLI) v20140922 software (running up until recently) are validated against independent observations during period 2008–2014 a global scale. On average 2013–2014,...
Within the framework of Network for Detection Stratospheric Change (NDSC), an intercomparison campaign ground‐based zenith‐sky viewing UV‐visible spectrometers was held at Andøya Rocket Range (69°N, 16°E) Andenes, Norway, from February 12 to March 8, 2003. The chosen site is classified as a complementary NDSC site. Eight groups seven countries participated in which focused on measurements slant columns NO 2 , BrO, and OClO. This first publication concentrates columns. Different analysis...
Abstract. Spectral measurements of BrO using zenith-sky and off-axis viewing geometries are combined in a linear multiple regression retrieval algorithm to provide stratospheric tropospheric vertical columns. One year measurement data investigated over Reunion-Island (20.9° S, 55.5° E), from August 2004 June 2005. A comparison between the columns retrieved at 45°, 80°, 85°, 87.5° 92.5° solar zenith angles photochemical simulations initialized by chemical fields 3-D-CTM SLIMCAT further...
Vertical profiles of stratospheric bromine monoxide (BrO) in the 15–30 km range are retrieved from SCIAMACHY limb scatter data over globe. First validation comparisons with balloon‐borne SAOZ‐BrO and LPMA/DOAS instruments indicate retrieval biases ∼20% or less. Propagated spectral fitting uncertainties lead to a precision approaching ∼25% on 2 grid at 25 km. This worsens higher altitudes because reduced signal lower penetrability atmosphere. In terms volume mixing ratio (VMR), single profile...
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,...
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...
After the well-reported record loss of Arctic stratospheric ozone up to 38% in winter 2010–2011, further large depletion 27% occurred 2015–2016. Record low polar vortex temperatures, below threshold for ice cloud (PSC) formation, persisted one month January 2016. This is first observation such an event and resulted unprecedented dehydration/denitrification vortex. Although chemistry–climate models (CCMs) generally predict cooling lower stratosphere with increasing atmospheric concentrations...
Abstract. The GOME-type Total Ozone Essential Climate Variable (GTO-ECV) is a level-3 data record, which combines individual sensor products into one single cohesive record covering the 22-year period from 1995 to 2016, generated in frame of European Space Agency's Change Initiative Phase II. It based on level-2 total ozone produced by GODFIT (GOME-type Direct FITting) v4 algorithm as applied GOME/ERS-2, OMI/Aura, SCIAMACHY/Envisat and GOME-2/Metop-A Metop-B observations. In this paper we...
Abstract. The QA4ECV (Quality Assurance for Essential Climate Variables) version 1.1 stratospheric and tropospheric NO2 vertical column density (VCD) climate data records (CDRs) from the OMI (Ozone Monitoring Instrument) satellite sensor are validated using NDACC (Network Detection of Atmospheric Composition Change) zenith-scattered light differential optical absorption spectroscopy (ZSL-DOAS) multi-axis DOAS (MAX-DOAS) as a reference. VCDs have small bias ∼0.2 Pmolec.cm-2 (5 %–10 %)...
A light and easily handled balloon‐borne uv‐visible spectrometer was designed for investigating ozone photochemistry in the Arctic winter. The optical sonde flown 10 times during EASOE campaign at Kiruna Northern Sweden from November 1991 until March 1992. flights gave first simultaneous measurements of vertical distributions nitrogen dioxide
Abstract. Ozone loss during the winter 2002/2003 has been evaluated from comparisons between total ozone reported by SAOZ network and simulated in passive mode both REPROBUS SLIMCAT. Despite fact that two models have a different approach to calculate descent inside vortex, evaluations provide similar results 18±4% using 20±4% SLIMCAT show started around mid-December, at least ten twenty days earlier than any of previous eleven winters, except 1993/1994. This unusual behaviour is consistent...
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...
Ground‐based UV‐visible instruments for NO 2 vertical column measurements have been operating at Issyk‐Kul station, in Kyrgyzstan, and Observatoire de Haute‐Provence (OHP), France, since 1983 1992, respectively. These already used validation of ERS‐2 Global Ozone Monitoring Experiment (GOME) Envisat Scanning Imaging Absorption Spectrometer Atmospheric Cartography (SCIAMACHY) data. Building upon the successful missions GOME SCIAMACHY, (OMI) was launched by NASA onboard EOS Aura satellite July...