A5009082437- Atmospheric Ozone and Climate
- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Meteorological Phenomena and Simulations
- Atmospheric aerosols and clouds
- Precipitation Measurement and Analysis
- Ionosphere and magnetosphere dynamics
- Calibration and Measurement Techniques
- Cryospheric studies and observations
- Geophysics and Gravity Measurements
- Spectroscopy and Laser Applications
- Arctic and Antarctic ice dynamics
Met Office
2016-2025
Centre National de la Recherche Scientifique
2013-2014
University of Maryland, College Park
2013-2014
Laboratoire d'Aérologie
2011-2014
Météo-France
2013-2014
Université de Toulouse
2013-2014
Centre National de Recherches Météorologiques
2011-2013
Abstract. We study the carbon monoxide (CO) variability in last decade measured by NASA's Atmospheric InfraRed Sounder (AIRS) on Earth Observing System (EOS)/Aqua satellite. The focus of this is to analyze CO and short-term trends separately for background fresh emissions based a new statistical approach. AIRS Level 2 (L2) retrieval algorithm utilizes cloud clearing treat contaminations signals, increases data coverage significantly yield more than 50% total measurements. first if affects...
Abstract. The objective of this paper is to deliver the most accurate ozone (O3) and carbon monoxide (CO) climatology for pure troposphere only, i.e. exclusively from ground dynamical tropopause on an individual profile basis. results (profiles columns) are derived solely Measurements OZone water vapour by in-service Alrbus airCraft programme (MOZAIC) over 15 years (1994–2009). study, focused northern mid-latitudes [24–50° N] [119° W–140° E], includes more than 40 000 profiles 11 sites give...
Abstract This paper evaluates the microwave instruments onboard latest Chinese polar-orbiting satellite, Feng-Yun 3D (FY-3D). Comparing three months of observations from Microwave Temperature Sounder 2 (MWTS-2), Humidity (MWHS-2), and Radiation Imager (MWRI) to Met Office short-range forecasts, we characterize instrumental biases, show how those biases have changed with respect their predecessors FY-3C, they compare Advanced Technology (ATMS) NOAA-20 Global Precipitation Measurement (GMI)....
Microwave radiances from passive polar-orbiting radiometers have been, until recently, assimilated in the Met Office global numerical weather prediction system after scenes significantly affected by atmospheric scattering are discarded. Recent upgrades seen introduction of a scattering-permitting observation operator and development variable error using both liquid ice water paths as proxies scattering-induced bias. Applied to Fengyun 3 Temperature Sounder 2 (MWTS-2) Humidity (MWHS-2), this...
Abstract. The space and time variabilities of methane (CH4) total column upper tropospheric mixing ratios are analysed above the Mediterranean Basin (MB) as part Chemical Aerosol Experiment (ChArMEx) programme. Since analysis mid-to-upper CH4 distribution from spaceborne sensors model outputs is challenging, we have adopted a climatological approach used wide variety data sets. We combined measurements Thermal And Near infrared Sensor for carbon Observations – Fourier Transform Spectrometer...
Confidence in the use of Earth observations for monitoring essential climate variables (ECVs) relies on validation satellite calibration accuracy to within a well-defined uncertainty. The gap analysis integrated atmospheric ECV (GAIA-CLIM) project investigated calibration/validation data sets using non-satellite reference data. Here, we explore role numerical weather prediction (NWP) frameworks assessment several meteorological sensors: advanced microwave scanning radiometer 2 (AMSR2),...
Abstract. We assess and illustrate the benefits of high-altitude attainment balloon-borne radiosonde soundings, up to beyond 10 hPa level compared e.g. 30 hPa, at operational stations sites Global Climate Observing System (GCOS) Reference Upper Air Network (GRUAN). first discuss technical challenges possible solutions for balloon soundings these higher altitudes. Then, we role high-ascent measurements in climate monitoring various process studies, contributions satellite calibration...
Abstract. The characterisation of errors and uncertainties in numerical weather prediction (NWP) model fields is a major challenge that addressed as part the Horizon 2020 Gap Analysis for Integrated Atmospheric ECV CLImate Monitoring (GAIA-CLIM) project. In regard, observations from GCOS (Global Climate Observing System) Reference Upper-Air Network (GRUAN) radiosondes are being used at Met Office European Centre Medium-Range Weather Forecasts (ECMWF) to assess associated with data. software...
The hyperspectral infrared atmospheric sounder (HIRAS), the first Chinese instrument, was launched in 2017 on board fourth polar orbiter of Feng Yun 3 series, FY-3D. instrument is a Fourier transform spectrometer with 2275 channels covering three spectral bands (650–1136, 1210–1750, and 2155–2550 cm−1) 0.625 cm−1 resolution. data quality assessment HIRAS observations at full normal resolutions presented. Comparisons short-range forecasts from Met Office numerical weather prediction (NWP)...
Abstract. This study tests a novel methodology to add value satellite data sets. methodology, fusion, is similar assimilation, except that the background model-based field replaced by set, in this case AIRS (Atmospheric Infrared Sounder) carbon monoxide (CO) measurements. The observational information comes from CO measurements with lower spatial coverage than AIRS, namely, TES (Tropospheric Emission Spectrometer) and MLS (Microwave Limb Sounder). We show combining these sets fusion uses...
Abstract. The tropical deep overshooting convection is known to be most intense above continental areas such as South America, Africa, and the maritime continent. However, its impact on tropopause layer (TTL) at global scale remains debated. In our analysis, we use 8-year Microwave Limb Sounder (MLS) water vapour (H2O), cloud ice-water content (IWC), temperature data sets from 2005 date, highlight interplays between these parameters their role in variability TTL, separately northern southern...
The HAMSTRAD microwave instrument operates at 60 and 183 GHz measures temperature water vapor, respectively, from 0- to 10-km altitude with a time resolution of 7 min. radiometer has been successfully deployed Dome C (Concordia Station), Antarctica (75°06' S, 123°21' E, 3233 m amsl) during the first summertime campaign for 12 days in January-February 2009. continuously running since January 2010, hosted within dedicated shelter. We have used very set data, recorded when was outdoors, assess...
Abstract The Dome C (Concordia) station in Antarctica (75°06′S, 123°21′E, 3233 m above mean sea level) has a unique opportunity to test the quality of remote-sensing measurements and meteorological analyses because it is situated well inside Eastern Antarctic Plateau less affected by local phenomena. Measurements tropospheric temperature water vapour (H 2 O) together with integrated (IWV) performed 2010 are statistically analysed assess their study yearly correlation between H O over entire...
Abstract. The contribution of deep convection to the amount water vapour and ice in tropical tropopause layer (TTL) from upper troposphere (UT; around 146 hPa) level (TL; 100 is investigated. Ice content (IWC) (WV) measured UT TL by Microwave Limb Sounder (MLS; Version 4.2) are compared precipitation (Prec) Tropical Rainfall Measurement Mission (TRMM; 007). two datasets, gridded within 2∘ × horizontal bins, have been analysed during austral convective season, December, January, February...
Abstract. The present analysis deals with one of the most debated aspects studies on upper troposphere/lower stratosphere (UTLS), namely budget water vapour (H2O) at tropical tropopause. Within French project “Multiscale in troposphere and lower TROpics” (TRO-pico), a global-scale has been set up based space-borne observations, models assimilation techniques. MOCAGE-VALENTINA tool used to assimilate Aura Microwave Limb Sounder (MLS) version 3.3 H2O measurements within 316–5 hPa range from...
Abstract. The objective of this paper is to deliver the most accurate ozone (O3) and carbon monoxide (CO) climatology for pure troposphere only, i.e. exclusively from ground dynamical tropopause on an individual profile basis. results (profiles columns) are derived solely Measurements OZone water vapour by in-service AIrbus airCraft programme (MOZAIC) over fifteen years (1994–2009). study, focused northern mid-latitudes [24° N–50° N] [120° W–140° E], includes more than 40 000 profiles 11...
<title>Abstract</title> Calibration of satellite observations is crucial to ensure the quality retrieved products essential for meteorological and climate applications. obtained monitored through a cascade stages, including post-launch vicarious calibration/validation activities comparison with independent reference measurements. Here, calibration method using radiative transfer simulations based on radiosondes considered in framework Microwave Imager (MWI) Ice Cloud (ICI) be launched Second...
Abstract Calibration of satellite observations is crucial for ensuring the quality retrieved products essential meteorological and climate applications. obtained monitored through a cascade stages, including postlaunch vicarious calibration/validation activities comparison with independent reference measurements. Here, calibration method using radiative transfer simulations based on radiosondes considered in framework Microwave Imager (MWI) Ice Cloud (ICI) to be launched Second Generation...
Abstract A new channel selection is proposed for the processing of observations at full spectral resolution (FSR) from Cross‐track Infrared Sounder (CrIS) and Hyperspectral Atmospheric (HIRAS) instruments in Met Office global numerical weather prediction (NWP) system. The has been derived order to minimise error NWP analysis compared an existing developed National Oceanic Administration (NOAA). Both selections have tested system investigate use FSR CrIS with current normal (NSR) set‐up...
Abstract. The space and time variabilities of methane (CH4) total column upper tropospheric mixing ratios are analyzed above the Mediterranean Basin (MB) as part Chemical Aerosol Experiment (ChArMEx) programme. Spaceborne measurements from Thermal And Near infrared Sensor for carbon Observations-Fourier Transform Spectrometer (TANSO-FTS) instrument on Greenhouse gases Observing SATellite (GOSAT) satellite, Atmospheric InfraRed (AIRS) AURA platform Infrared Sounder Interferometer (IASI)...
Abstract. The present analysis deals with one of the most debated aspect studies on Upper Troposphere/Lower Stratosphere (UTLS), namely budget water vapour (H2O) at tropical tropopause. Within French project "Multiscale in upper troposphere and lower stratosphere TROpics" (TRO-pico), a global-scale has been set up based space-borne observations, model assimilation techniques. MOCAGE-VALENTINA tool used to assimilate Aura Microwave Limb Sounder (MLS) version 3.3 H2O measurements within 316–5...
Abstract. The tropical deep overshooting convection is known to be most intense above continental areas such as South America, Africa and the maritime continent. However, its impact on Tropical Tropopause Layer (TTL) at global scale remains debated. In our analysis, we use 8 yr Microwave Limb Sounder (MLS) water vapour (H2O), cloud ice content (IWC) temperature datasets from 2005 date, highlight interplays between these parameters their role in variability TTL, separately northern southern...
Abstract. We study the Carbon Monoxide (CO) variability in last decade measured by NASA's Atmospheric InfraRed Sounder (AIRS) on Earth Observing Systems (EOS)/Aqua satellite and Europe's Infrared Interferometer (IASI) MetOp platform. The focus of this is to analyze CO short-term trends separately for background new emissions based a statistical approach. AIRS Level 2 (L2) retrieval algorithm, as well IASI products from NOAA, utilizes cloud clearing treat contaminations signals; increases...