A5061971334- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Meteorological Phenomena and Simulations
- Remote Sensing in Agriculture
- Calibration and Measurement Techniques
- Air Quality Monitoring and Forecasting
- Marine and coastal ecosystems
- Urban Heat Island Mitigation
- Climate variability and models
- Spacecraft and Cryogenic Technologies
- Icing and De-icing Technologies
- Cryospheric studies and observations
- Arctic and Antarctic ice dynamics
- Infrared Target Detection Methodologies
- Aerospace Engineering and Energy Systems
- Remote-Sensing Image Classification
- Ionosphere and magnetosphere dynamics
- Advanced Fiber Optic Sensors
- Seismic Waves and Analysis
- Aeolian processes and effects
- Astro and Planetary Science
- Tropical and Extratropical Cyclones Research
- Geology and Paleoclimatology Research
Météo-France
2015-2024
Université de Toulouse
2019-2024
Centre National de la Recherche Scientifique
2005-2024
Centre National de Recherches Météorologiques
2019-2021
Centre Hospitalier Lannion Trestel
2021
Université Paris Sciences et Lettres
2018
École Nationale Supérieure des Mines de Paris
2018
Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique
2018
SRON Netherlands Institute for Space Research
2010-2012
Laboratoire de Météorologie Physique
2008-2010
Abstract. This paper gives an update of the RTTOV (Radiative Transfer for TOVS) fast radiative transfer model, which is widely used in satellite retrieval and data assimilation communities. a model simulating top-of-atmosphere radiances from passive visible, infrared microwave downward-viewing radiometers. In addition to forward it also optionally computes tangent linear, adjoint Jacobian matrix providing changes profile variable perturbations assuming linear relationship about given...
The 15 January 2022 climactic eruption of Hunga volcano, Tonga, produced an explosion in the atmosphere a size that has not been documented modern geophysical record. event generated broad range atmospheric waves observed globally by various ground-based and spaceborne instrumentation networks. Most prominent was surface-guided Lamb wave (≲0.01 hertz), which we propagating for four (plus three antipodal) passages around Earth over 6 days. As measured amplitudes, comparable to 1883 Krakatau...
Monitoring of atmospheric methane (CH 4 ) concentrations from space‐based instruments such as the Scanning Imaging Absorption Spectrometer for Atmospheric Chartography (SCIAMACHY) and Greenhouse Gases Observing Satellite (GOSAT) relies on observations sunlight backscattered to space by Earth's surface atmosphere. Retrieval biases occur due unaccounted scattering effects aerosols thin cirrus that modify lightpath. Here, we evaluate accuracy two retrieval methods aim at minimizing induced...
The fine particle abundance, i.e., matter (PM) concentration, is one of the indicators air quality and therefore subject to ground‐based measurements. Complementary satellite aerosol remote sensing techniques provide with maps optical thickness (AOT), which sensitive abundance. This paper investigates problem retrieving PM concentration from AOT, both on daily average values, basis a large data set where networks are combined measurements AOTs. It found that linear model fails at explaining...
Airborne measurements in an Arctic mixed‐phase nimbostratus cloud were conducted Spitsbergen on 21 May 2004 during the international Study of Tropospheric Aerosol, Clouds and Radiation (ASTAR) campaign. The situ instrument suite aboard Alfred Wegener Institute Polar 2 aircraft included a polar nephelometer (PN), particle imager (CPI), Nevzorov probe, standard PMS 2DC probe to measure single‐scattering properties (at wavelength 0.8 μ m), morphology size, as well in‐cloud partitioning...
Abstract A new ice cloud optical property database in the thermal infrared has been parameterized for RTTOV radiative transfer model. The Self‐Consistent Scattering Model (SCSM) is based on an ensemble model of crystals and a parameterization particle size distribution. This convolution can predict properties cirrus without need priori information shape estimate crystal effective dimension. are estimated through linear parameterizations ambient temperature water content. We evaluate against...
Abstract Data from hyperspectral infrared sounders are routinely ingested worldwide by the National Weather Centers. The cloud‐free fraction of this data is used for initializing forecasts which include temperature, water vapor, cloud, and ice cloud profiles on a global grid. Although these sensitive to vertical distribution liquid in clouds, information not fully utilized. In future, could be validating clouds Center models forecasts. We evaluate how well calculated radiances Radiative...
As part of the NWCSAF project (Nowcasting Satellite Application Facility), CNRM participates in retrieval cloud properties from geostationary satellite observations. These retrievals include Cloud Mask and Types classification, thermodynamics at macroscopic scales (Cloud Top Temperature Height) as well microphysical (effective radius, optical thickness, liquid ice water path). Radiative transfer simulations are mandatory to retrieve these properties. In this study, I performed observations...
Abstract. This paper gives an update of the RTTOV (Radiative Transfer for TOVS) fast radiative transfer model which is widely used in satellite retrieval and data assimilation communities. a simulating top atmosphere radiances from passive visible, infrared microwave downward-viewing radiometers. In addition to forward model, it also optionally computes tangent linear, adjoint Jacobian matrix providing changes profile variable perturbations assuming linear relationship about given...
Abstract. This paper describes a new gas optical depth parameterisation implemented in the most recent release, version 13, of radiative transfer model RTTOV (Radiative Transfer for TOVS). is fast, one-dimensional simulating top-of-atmosphere visible, infrared, and microwave radiances observed by downward-viewing space-borne passive sensors. A key component fast absorption various gases atmosphere. The existing has been extended over many years to allow additional variable simulations...
Abstract The infrared sounder (IRS) instrument is an Fourier‐transform spectrometer that will be on board the Meteosat Third Generation series of future European Organization for Exploitation Meteorological Satellite's geostationary satellites. It measure radiance emitted by Earth at top atmosphere using 1,960 channels. IRS provide high spatial‐ and temporal‐frequency four‐dimensional information atmospheric temperature humidity, winds, clouds, surfaces, as well chemical composition...
This study describes the scientific approach and validation of visible near‐infrared snow‐free land surface Bidirectional Reflectance Distribution Function (BRDF) atlas for Version 11 Radiative Transfer Television Infrared Observation Satellite (TIROS) Operational Vertical Sounder (TOVS) (RTTOV) Forward Model. The provides a global (at spatial resolution 0.1°) monthly mean BRDF any instrument containing channels with central wavelength between 0.4 2.5 µm, as well quality index BRDF. It is...
Abstract We present a detailed analysis of the microstructure in shallow part (100–580m) European Project for Ice Coring Antarctica (EPICA) ice core at Dome Concordia. In Holocene ice, average grain-size increases with depth. This is normal grain-growth process driven by reduction total grain-boundary energy. Deeper, associated Holocene–Last Glacial Maximum (LGM) climatic transition, sharp decrease observed. to explain modifications change, we discuss role soluble and insoluble...
Abstract. The Medium Resolution Imaging Spectrometer (MERIS) launched in February 2002 on-board the ENVISAT spacecraft is making global observations of top-of-atmosphere (TOA) radiances. Aerosol optical properties are retrieved over land using Look-Up Table (LUT) based algorithm and surface reflectances blue red spectral regions. We compared instantaneous aerosol thicknesses by MERIS at locations containing sites within Robotic Network (AERONET). Between 2005, a set 500 images were used this...
The Monitoring Nitrous Oxide Sources (MIN2OS) satellite project aims at monitoring global-scale nitrous oxide (N2O) sources by retrieving N2O surface fluxes from the inversion of space-borne measurements that are sensitive to lowermost atmospheric layers under favorable conditions. MIN2OS will provide emission estimates a horizontal resolution 1° × on global scale and 10 km2 regional weekly monthly basis depending application (e.g., agriculture, national inventories, policy, scientific...
Abstract. The study assesses the possible benefit of assimilating aerosol optical depth (AOD) from future space-borne sensor FCI (Flexible Combined Imager) for air quality monitoring in Europe. An observing system simulation experiment (OSSE) was designed and applied over a 4-month period, which includes severe-pollution episode. focuses on channel centred at 444 nm, is shortest wavelength FCI. A nature run (NR) four different control runs MOCAGE chemistry transport model were evaluated to...
MERIS aerosol remote sensing over land is based on the use of pixels covered by vegetation. Dense Dark Vegetation are selected using Atmospheric Resistant Index as spectral index. Above an ARVI threshold, TARVI, at a given wavelength, standard DDV reflectance ρDDV set to constant value. Initially, 11 biomes and 20 models have been from POLDER 1 imagery. A clear limitation initial process was limited spatial coverage pixels. That reason why, concept has extended include less dark Preliminary...
A monthly mean land and snow Bidirectional Reflectance Distribution Function (BRDF) atlas for visible near infrared parts of the spectrum has been developed Radiative Transfer Television Infrared Observation Satellite (TIROS) Operational Vertical sounder (TOVS) (RTTOV). The follows methodology RTTOV University Wisconsin surface emissivity (UWIREMIS) atlas, i.e., it combines satellite retrievals a principal component analysis on dataset hyper-spectral hemispherical reflectance or albedo....
Inland waters are an increasingly valuable natural resource that has major impact and benefits for population environment. The new generation of ocean colour sensors better spatial resolution, hence suitable monitoring water quality lakes. As alternative to standard algorithms developed oceans, which often fail over inland waters, we propose here a scheme based on aerosol remote sensing land. have spectral bands allow characterization aerosols dark land pixels (vegetation in the blue red...
The present study aims to quantify the potential of hyperspectral thermal infrared sounders such as Infrared Atmospheric Sounding Interferometer (IASI) and future IASI next generation (IASI-NG) for retrieving ice cloud layer altitude thickness together with water path. We employed radiative transfer model Radiative Transfer TOVS (RTTOV) simulate cloudy radiances using parameterized optical properties. have been computed from an profile database coming global operational short-range forecasts...
Abstract. RTTOV (the Radiative Transfer for TOVS code, where is the TIROS Operational Vertical Sounder) coefficients are evaluated using a large, independent dataset of 25 000 atmospheric model profiles as robust test diverse 83 training typically used. The study carried out nine historical satellite instruments: InfraRed Interferometer Spectrometer D (IRIS-D), Satellite Infrared B (SIRS-B), Medium Resolution Radiometer (MRIR) and High (HRIR) infrared part spectrum, Microwave Sounding Unit...
© 2019 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).CORRESPONDING AUTHOR: Vinia Mattioli, vinia.mattioli@eumetsat.int
Abstract Spectral characteristics of the future Orbiting Carbon Observatory (OCO) sensor, which will be launched in January 2009, were used to infer carbon dioxide column-averaged mixing ratio over liquid water clouds ocean by means radiative transfer simulations and an inversion process based on optimal estimation theory. Before retrieving clouds, cloud properties such as optical depth, effective radius, cloud-top pressure must known. Cloud not included prior but are retrieved within...