A5088835440- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Atmospheric chemistry and aerosols
- Spectroscopy and Laser Applications
- Air Quality Monitoring and Forecasting
- Hydrocarbon exploration and reservoir analysis
- Air Quality and Health Impacts
- Geochemistry and Geologic Mapping
- Calibration and Measurement Techniques
- Methane Hydrates and Related Phenomena
- Vehicle emissions and performance
- Climate variability and models
- Geophysics and Gravity Measurements
- Water Quality Monitoring and Analysis
- Carbon Dioxide Capture Technologies
- Spacecraft and Cryogenic Technologies
- Cryospheric studies and observations
- Ionosphere and magnetosphere dynamics
- Wind and Air Flow Studies
- Atmospheric aerosols and clouds
- Scientific Research and Discoveries
- Fire effects on ecosystems
- French Urban and Social Studies
- COVID-19 impact on air quality
- Aerospace Engineering and Energy Systems
Sorbonne Université
2016-2025
Centre National de la Recherche Scientifique
2014-2025
Molécule aux Nanos-objets : Réactivité, Interactions et Spectroscopies
2025
Université Paris Sciences et Lettres
2016-2024
Laboratoire d’Etudes du Rayonnement et de la Matière en Astrophysique et Atmosphères
2015-2024
Tohoku University
2024
University of Wollongong
2024
University of Bremen
2020-2022
École nationale des ponts et chaussées
2022
Centre d'Enseignement et de Recherche en Environnement Atmosphérique
2022
Abstract. NASA's Orbiting Carbon Observatory-2 (OCO-2) has been measuring carbon dioxide column-averaged dry-air mole fraction, XCO2, in the Earth's atmosphere for over 2 years. In this paper, we describe comparisons between first major release of OCO-2 retrieval algorithm (B7r) and XCO2 from OCO-2's primary ground-based validation network: Total Column Observing Network (TCCON). The retrievals, after filtering bias correction, agree well when aggregated around coincident with TCCON data...
Abstract. Since September 2014, NASA's Orbiting Carbon Observatory-2 (OCO-2) satellite has been taking measurements of reflected solar spectra and using them to infer atmospheric carbon dioxide levels. This work provides details the OCO-2 retrieval algorithm, versions 7 8, used derive column-averaged dry air mole fraction CO2 (XCO2) for roughly 100 000 cloud-free recorded by each day. The algorithm is based on Atmospheric Observations from Space (ACOS) which applied observations Greenhouse...
Abstract. TROPOMI (the TROPOspheric Monitoring Instrument), on board the Sentinel-5 Precursor (S5P) satellite, has been monitoring Earth's atmosphere since October 2017 with an unprecedented horizontal resolution (initially 7 km2×3.5 km2, upgraded to 5.5 km2 in August 2019). air quality is one of main objectives TROPOMI; it obtains measurements important pollutants such as nitrogen dioxide, carbon monoxide, and formaldehyde (HCHO). In this paper we assess latest HCHO products versions...
Abstract. The Sentinel-5 Precursor (S5P) mission with the TROPOspheric Monitoring Instrument (TROPOMI) on board has been measuring solar radiation backscattered by Earth's atmosphere and surface since its launch 13 October 2017. In this paper, we present for first time S5P operational methane (CH4) carbon monoxide (CO) products' validation results covering a period of about 3 years using global Total Carbon Column Observing Network (TCCON) Infrared Working Group Detection Atmospheric...
Abstract. Accurate accounting of emissions and removals CO2 is critical for the planning verification emission reduction targets in support Paris Agreement. Here, we present a pilot dataset country-specific net carbon exchange (NCE; fossil plus terrestrial ecosystem fluxes) stock changes aimed at informing countries' budgets. These estimates are based on “top-down” NCE outputs from v10 Orbiting Carbon Observatory (OCO-2) modeling intercomparison project (MIP), wherein an ensemble inverse...
Abstract. The Total Carbon Column Observing Network (TCCON) measures column-average mole fractions of several greenhouse gases (GHGs) beginning in 2004 from over 30 current or past measurement sites around the world, using solar absorption spectroscopy near infrared region. TCCON GHG data have been used extensively for multiple purposes, including studies carbon cycle and anthropogenic emissions as well to validate improve observations made spacebased sensors. Here, we describe an update...
Abstract. The Total Carbon Column Observing Network (TCCON) measures column-average mole fractions of several greenhouse gases (GHGs), beginning in 2004, from over 30 current or past measurement sites around the world using solar absorption spectroscopy near-infrared (near-IR) region. TCCON GHG data have been used extensively for multiple purposes, including studies carbon cycle and anthropogenic emissions, as well to validate improve observations space-based sensors. Here, we describe an...
Abstract. This work presents the latest release (v9.0) of University Leicester GOSAT Proxy XCH4 dataset. Since launch satellite in 2009, these data have been produced by UK National Centre for Earth Observation (NCEO) as part ESA Greenhouse Gas Climate Change Initiative (GHG-CCI) and Copernicus Services (C3S) projects. With now over a decade observations, we outline many scientific studies achieved using past versions order to highlight how this version may be used future. We describe detail...
Abstract. Providing timely information on urban greenhouse gas (GHG) emissions and their trends to stakeholders relies reliable measurements of atmospheric concentrations the understanding how local transport influence these observations. Portable Fourier transform infrared (FTIR) spectrometers were deployed at five stations in Paris metropolitan area provide column-averaged CO2 (XCO2) during a field campaign spring 2015, as part Collaborative Carbon Column Observing Network (COCCON). Here,...
Abstract. In this study, an extension on the previously reported status of COllaborative Carbon Column Observing Network's (COCCON) calibration procedures incorporating refined methods is presented. COCCON a global network portable Bruker EM27/SUN FTIR spectrometers for deriving column-averaged atmospheric abundances greenhouse gases. The original laboratory open-path lamp measurements instrumental line shape (ILS) spectrometer from water vapour lines have been and extended to secondary...
Abstract. The Thermal And Near infrared Sensor for carbon Observation – Fourier Transform Spectrometer (TANSO-FTS) on the Japanese Greenhouse gases Observing SATellite (GOSAT) has been returning data since April 2009. version 9 (v9) Atmospheric Carbon Observations from Space (ACOS) Level 2 Full Physics (L2FP) retrieval algorithm (Kiel et al., 2019) was used to derive estimates of dioxide (CO2) dry air mole fraction (XCO2) TANSO-FTS measurements collected over its first 11 years operation....
Abstract. Volatile organic compounds (VOCs) are key precursors of particulate matter and tropospheric ozone. Although the terrestrial biosphere is by far largest source VOCs into atmosphere, emissions biogenic remain poorly constrained at regional scale. In this work, we derive top-down over Europe using weekly averaged TROPOMI formaldehyde (HCHO) data from 2018 to 2021. The systematic bias HCHO columns characterized corrected for based on comparisons with FTIR seven European stations....
Abstract. Spaceborne formaldehyde (HCHO) measurements constitute an excellent proxy for the sources of non-methane volatile organic compounds (NMVOCs). Past studies suggested substantial overestimations NMVOC emissions in state-of-the-art inventories over major source regions. Here, QA4ECV (Quality Assurance Essential Climate Variables) retrieval HCHO columns from OMI (Ozone Monitoring Instrument) is evaluated against (1) FTIR (Fourier-transform infrared) column observations at 26 stations...
Abstract This study presents the ozone monitoring instrument (OMI) Collection 4 formaldehyde (HCHO) retrieval developed with Smithsonian Astrophysical Observatory's (SAO) Making Earth System Data Records for Use in Research Environments (MEaSUREs) algorithm. The algorithm updates and makes improvements to NASA operational OMI HCHO (OMI 3 HCHO) algorithm, has been transitioned use Level‐1B radiances. paper describes updated compares data products. exhibits remarkably improved stability over...
Abstract. Among the more than 20 ground-based FTIR (Fourier transform infrared) stations currently operating around globe, only a few have provided formaldehyde (HCHO) total column time series until now. Although several independent studies shown that measurements can provide columns with good precision, spatial coverage has not been optimal for providing diagnostics satellite or model validation. Furthermore, these past used different retrieval settings, and biases as large 50 % be observed...
Abstract TanSat is the 1st Chinese carbon dioxide (CO 2 ) measurement satellite, launched in 2016. In this study, University of Leicester Full Physics (UoL‐FP) algorithm implemented for nadir mode XCO retrievals. We develop a spectrum correction method to reduce retrieval errors by online fitting an 8 th order Fourier series. The spectrum‐correction model and its priori parameters are developed analyzing solar calibration measurement. This provides significant improvement O A band retrieval....
Abstract. Since 2009, the Greenhouse gases Observing SATellite (GOSAT) has performed radiance measurements in near-infrared (NIR) and shortwave infrared (SWIR) spectral region. From February 2019 onward, data from GOSAT-2 have also been available. We present first results application of Fast atmOspheric traCe gAs retrievaL (FOCAL) algorithm to derive column-averaged dry-air mole fractions carbon dioxide (XCO2) GOSAT radiances their validation. FOCAL was initially developed for OCO-2 XCO2...
Abstract. We show new results from an updated version of the Fast atmOspheric traCe gAs retrievaL (FOCAL) retrieval method applied to measurements Greenhouse gases Observing SATellite (GOSAT) and its successor GOSAT-2. FOCAL was originally developed for estimating total column carbon dioxide mixing ratio (XCO2) spectral made by Orbiting Carbon Observatory-2 (OCO-2). However, depending on available windows, also successfully retrieves amounts other atmospheric species their uncertainties...
Abstract Carbonyl sulfide (OCS) is a non‐hygroscopic trace species in the free troposphere and large sulfur reservoir maintained by both direct oceanic, geologic, biogenic, anthropogenic emissions oxidation of other sulfur‐containing source species. It largest transported to stratosphere during volcanically quiescent periods. Data from 22 ground‐based globally dispersed stations are used derive trends total partial column OCS. Middle infrared spectral data recorded solar‐viewing Fourier...
Abstract We validate formaldehyde (HCHO) vertical column densities (VCDs) from Ozone Mapping and Profiler Suite Nadir Mapper (OMPS‐NM) instruments onboard the Suomi National Polar‐orbiting Partnership (Suomi NPP) satellite for 2012–2020 Oceanic Atmospheric Administration‐20 (NOAA‐20) 2018–2020, hereafter referred to as OMPS‐NPP OMPS‐N20, with ground‐based Fourier‐Transform Infrared (FTIR) observations of Network Detection Composition Change (NDACC). OMPS‐NPP/N20 HCHO products reproduce...
Abstract. Observations of carbon monoxide (CO) from the Measurements Of Pollution In The Troposphere (MOPITT) instrument aboard Terra spacecraft were expected to have an accuracy 10 % prior launch in 1999. Here we evaluate MOPITT Version 7 joint (V7J) thermal-infrared and near-infrared (TIR–NIR) retrieval precision suggest ways further improve observations. We take five steps involving filtering or bias corrections reduce scatter data relative other soundings ground-based measurements. (1)...
Abstract. Although optical components in Fourier transform infrared (FTIR) spectrometers are preferably wedged, practice, spectra typically suffer from the effects of resonances (“channeling”) affecting retrieval weakly absorbing gases. This study investigates level channeling each FTIR spectrometer within Network for Detection Atmospheric Composition Change (NDACC). Dedicated were recorded by more than 20 NDACC using a laboratory mid-infrared source and two detectors. In indium antimonide...
Recent advances in satellite observations of methane provide increased opportunities for inverse modeling. However, challenges exist the observation optimization and retrievals high latitudes. In this study, we examine possibilities use total column averaged dry-air mole fractions (XCH4) data over land from TROPOspheric Monitoring Instrument (TROPOMI) on board Sentinel 5 Precursor estimation CH4 fluxes using CarbonTracker Europe-CH4 (CTE-CH4) atmospheric model. We carry out simulations...
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...