LOA - Laboratoire d'Optique Atmosphèrique - UMR 8518

France Centre de recherche public
Accréditation CIR
Contact principal
Téléphone : 33(0)3 20 43 45 32
Mail : direction-loa@univ-lille1.fr
Adresse :
Bât. P5
59655 Villeneuve d'Ascq
France
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Description
(Extrait du site web)
Activité Générale :

L'optique atmosphérique cherche à modéliser la propagation à travers l'atmosphère de la lumière visible reçue du soleil et de la lumière infrarouge émise par l'ensemble des surfaces et de l'atmosphère terrestres. Les travaux menés au LOA dans ce domaine s'insèrent dans l'étude globale du climat.

Un premier objectif est de quantifier le rôle de ce rayonnement visible et infrarouge dans les échanges énergétiques de la planète, en particulier de préciser le rôle des nuages dans le bilan radiatif de la terre dont ils constituent un facteur essentiel.

Un second axe de recherche porte sur la caractérisation à l'échelle du globe de différents paramètres qui sont en relation directe avec l'évolution climatique (nuages, aérosols, surfaces), en utilisant principalement l'observation satellitaire.
Les travaux menés dans ce contexte mettent en oeuvre:

* La conception de logiciels permettant de simuler le transfert du rayonnement, à l'aide de modèles du système terre - atmosphère.
* L'analyse d'observations acquises par les capteurs satellitaires existants, le plus souvent sous forme d'images traitées sur ordinateur, et la conception d'expériences satellitaires nouvelles.
* La réalisation de campagnes d'observation de terrain, utilisant des appareillages développés par le laboratoire, mis en oeuvre au sol ou à partir d'avions ou de ballons stratosphériques, et destinés à valider les modèles ou à mettre en évidence les processus atmosphériques.

Le LOA est une unité Mixte de Recherches (UMR/CNRS 8518). Il fait partie de la Fédération de Recherches (FR1818) Milieux naturels et anthropisé Flux et dynamique.

Quelques documents de Laboratoire d'Optique Atmosphèrique
Global and regional Earth-system monitoring using satellite and in-situ data
GEMS
2005 - 2009

Sujets :
Earth Sciences, Environmental Protection, Meteorology, Aerospace Technology
Participants :
Laboratoire d'Optique Atmosphèrique
Laboratoire d'Optique Atmosphèrique


European Centre for Medium-Range Weather Forecasts
European Centre for Medium-Range Weather Forecasts


Danish Meteorological Institute
Danish Meteorological Institute


National Technical University of Athens
National Technical University of Athens


Arpa Emilia Romagna
Arpa Emilia Romagna


Deutscher Wetterdienst
Deutscher Wetterdienst


Royal Netherlands Meteorological Institute
Royal Netherlands Meteorological Institute


Commissariat À L'energie Atomique
Commissariat À L'energie Atomique


Imperial College of Science, Technology and Medicine
Imperial College of Science, Technology and Medicine


Max Planck Gesellschaft Zur Förderung Der Wissenschaften E.V.
Max Planck Gesellschaft Zur Förderung Der Wissenschaften E.V.


Institut D'aeronomie Spatiale de Belgique
Institut D'aeronomie Spatiale de Belgique


Finnish Meteorological Institute
Finnish Meteorological Institute


University of Bremen
University of Bremen


Universite Pierre et Marie Curie
Universite Pierre et Marie Curie


National University of Ireland, Galway
National University of Ireland, Galway


Koninklijk Meteorologisch Instituut - Institut Royal Meteorologique
Koninklijk Meteorologisch Instituut - Institut Royal Meteorologique


Consiglio Nazionale Delle Ricerche
Consiglio Nazionale Delle Ricerche


Meteorologisk Institutt
Meteorologisk Institutt


Rhenish Institute for Environmental Research at the University of Cologne
Rhenish Institute for Environmental Research at the University of Cologne


European Commission, General Directorate Joint Research Centre
European Commission, General Directorate Joint Research Centre


Institut National de L'environnement Industriel et Risques
Institut National de L'environnement Industriel et Risques


Czech Hydrometeorological Institute
Czech Hydrometeorological Institute


Environmental Protection Agency Ireland
Environmental Protection Agency Ireland


Met Office
Met Office


Polish Institute of Environmental Protection
Polish Institute of Environmental Protection


Forschungszentrum Juelich GMBH
Forschungszentrum Juelich GMBH


The Provost, Fellows and Scholars of the College of the Holy and Undivided Trinity of Queen Elizabeth, Near Dublin (hereinafter Called Tcd)
The Provost, Fellows and Scholars of the College of the Holy and Undivided Trinity of Queen Elizabeth, Near Dublin (hereinafter Called Tcd)


COMMISSARIAT À L'ENERGIE ATOMIQUE FRANCE
COMMISSARIAT À L'ENERGIE ATOMIQUE
Research

LABORATOIRE DES SCIENCES DU CLIMAT ET DE L'ENVIRONMENT JOINT RESEARCH UNIT CEA-CNRS 1572' 31/33 rue de la Federation
FRANCE
IMPERIAL COLLEGE OF SCIENCE, TECHNOLOGY AND MEDICINE UNITED KINGDOM
IMPERIAL COLLEGE OF SCIENCE, TECHNOLOGY AND MEDICINE
Education

EPIDEMIOLOGY & PUBLIC HEALTH, DIVISION OF PRIMARY CARE & POPULATION HEALTH SCIENCES Exhibition Road
UNITED KINGDOM
MAX PLANCK GESELLSCHAFT ZUR FÖRDERUNG DER WISSENSCHAFTEN E.V. DEUTSCHLAND
MAX PLANCK GESELLSCHAFT ZUR FÖRDERUNG DER WISSENSCHAFTEN E.V.
Other,Research

MAX-PLANCK-INSTITUT FÜR METEOROLOGIE Postfach 101062 Hofgartenstrasse 8
DEUTSCHLAND
ROYAL NETHERLANDS METEOROLOGICAL INSTITUTE NEDERLAND
ROYAL NETHERLANDS METEOROLOGICAL INSTITUTE
Other

DEPARTMENT OF CLIMATE RESEARCH AND SEISMOLOGY PO Box 201 Wilhlminalaan 10
NEDERLAND
INSTITUT D'AERONOMIE SPATIALE DE BELGIQUE BELGIQUE-BELGIË
INSTITUT D'AERONOMIE SPATIALE DE BELGIQUE
Research

IASB/BIRA 3 Avenue Circulaire
BELGIQUE-BELGIË
FINNISH METEOROLOGICAL INSTITUTE SUOMI/FINLAND
FINNISH METEOROLOGICAL INSTITUTE
Research

RESEARCH DEPARTMENT PO Box 503 Vuorikatu 24
SUOMI/FINLAND
UNIVERSITY OF BREMEN DEUTSCHLAND
UNIVERSITY OF BREMEN
Education

UNIVERSITY OF BREMEN, DEP. OF PHYSICS (FBI), INST. OF ENVIRON. PHYSICS AND REMOTE SENSING (IUP/IFE) Postfach 330440 Bibliotheksstrasse
DEUTSCHLAND
UNIVERSITE PIERRE ET MARIE CURIE FRANCE
UNIVERSITE PIERRE ET MARIE CURIE
Education

SERVICE D'AÉRONOMIE - UPMC - TOUR 45-46 (BOITE 102) 4, Place Jussieu
FRANCE
METEO-FRANCE, CENTRE NATIONAL DE RECHERCHES METEOROLOGIQUES FRANCE
METEO-FRANCE, CENTRE NATIONAL DE RECHERCHES METEOROLOGIQUES
Research

CENTRE NATIONAL DE RECHERCHES METEOROLOGIQUES Avenue Gaspard Coriolis, 42
FRANCE
NATIONAL UNIVERSITY OF IRELAND, GALWAY ÉIRE/IRELAND
NATIONAL UNIVERSITY OF IRELAND, GALWAY
Education

ENVIRONMENTAL CHANGE INSTITUTE University Road
ÉIRE/IRELAND
KONINKLIJK METEOROLOGISCH INSTITUUT - INSTITUT ROYAL METEOROLOGIQUE BELGIQUE-BELGIË
KONINKLIJK METEOROLOGISCH INSTITUUT - INSTITUT ROYAL METEOROLOGIQUE
Research

DEPARTMENT OF OBSERVATIONS Ringlaan 3
BELGIQUE-BELGIË
CONSIGLIO NAZIONALE DELLE RICERCHE ITALIA
CONSIGLIO NAZIONALE DELLE RICERCHE
Research

INSTITUTO DI SCIENZE DELL'ATMOSFERA E DEL CLIMA, ISAC-CNR' Piazzale Aldo Moro 7
ITALIA
METEOROLOGISK INSTITUTT NORGE
METEOROLOGISK INSTITUTT
Research

RESEARCH AND DEVELOPMENT DEPARTMENT, AIR POLLUTION SECTION Niels Henrik Abels vei 40
NORGE
RHENISH INSTITUTE FOR ENVIRONMENTAL RESEARCH AT THE UNIVERSITY OF COLOGNE DEUTSCHLAND
RHENISH INSTITUTE FOR ENVIRONMENTAL RESEARCH AT THE UNIVERSITY OF COLOGNE
Research

DATA ASSIMILATION RESEARCH GROUP Aachener Strasse 201 -209
DEUTSCHLAND
EUROPEAN COMMISSION, GENERAL DIRECTORATE JOINT RESEARCH CENTRE ITALIA
EUROPEAN COMMISSION, GENERAL DIRECTORATE JOINT RESEARCH CENTRE
Research

CLIMATE CHANGE UNIT OF THE INSTITUE FOR ENVIRONMENT AND SUSTAINABILITY Via E. Fermi, 1
ITALIA
INSTITUT NATIONAL DE L'ENVIRONNEMENT INDUSTRIEL ET RISQUES FRANCE
INSTITUT NATIONAL DE L'ENVIRONNEMENT INDUSTRIEL ET RISQUES
Research

CHRONIC RISKS DIVISION Parc Technologique Alata
FRANCE
CZECH HYDROMETEOROLOGICAL INSTITUTE CESKA REPUBLIKA
CZECH HYDROMETEOROLOGICAL INSTITUTE
Other

CZECH HYDROMETEOROLOGICAL INSTITUTE Na Sabatce 17
CESKA REPUBLIKA
ENVIRONMENTAL PROTECTION AGENCY IRELAND ÉIRE/IRELAND
ENVIRONMENTAL PROTECTION AGENCY IRELAND
Other

ERTDI PROGRAMME, ENVIRONMENTAL PROTECTION AGENCY IRELAND PO Box 3000 Johnstown Castle Estate
ÉIRE/IRELAND
MET OFFICE UNITED KINGDOM
MET OFFICE
Other

MET OFFICE HADLEY CENTRE FOR CLIMATE PREDICTION AND RESEARCH Fitzroy road
UNITED KINGDOM
POLISH INSTITUTE OF ENVIRONMENTAL PROTECTION POLSKA
POLISH INSTITUTE OF ENVIRONMENTAL PROTECTION

DEPARTMENT OF ENVIRONMENTAL POLICY - SECTION OF INTEGRATED MODELLING AIR POLLUTION MONITORING DIVISION Krucza 5/11
POLSKA
FORSCHUNGSZENTRUM JUELICH GMBH DEUTSCHLAND
FORSCHUNGSZENTRUM JUELICH GMBH

INSTITUTE OF CHEMISTRY AND DYNAMICS OF THE GEOSPHERE, TROPOSPHERE (ICG II)
DEUTSCHLAND
THE PROVOST, FELLOWS AND SCHOLARS OF THE COLLEGE OF THE HOLY AND UNDIVIDED TRINITY OF QUEEN ELIZABETH, NEAR DUBLIN (HEREINAFTER CALLED TCD) ÉIRE/IRELAND
THE PROVOST, FELLOWS AND SCHOLARS OF THE COLLEGE OF THE HOLY AND UNDIVIDED TRINITY OF QUEEN ELIZABETH, NEAR DUBLIN (HEREINAFTER CALLED TCD)

DEPARTMENT OF CIVIL STRUCTURAL & ENVIRONMENT ENGINEERING 2 College Green
ÉIRE/IRELAND
Hide objectives
Fifteen thousand excess deaths in the heat wave of summer 2003 showed that Europe lacks operational capabilities to provide adequate medium-range (3-7 day) & short-range (1-3 day) forecasts for natural disasters involving atmospheric chemistry & dy namics. This proposal, GEMS, will create new European operational capabilities for medium-range & short-range air-chemistry forecasts, through much improved exploitation of satellite data. The GEMS consortium comprises ten regional centres, most with o perational responsibilities for regional air-quality forecasting, ten leading research labs with capabilities & models on all aspects of atmospheric chemistry, two leading European labs, ECMWF with global operational weather capabilities, & the E U's JRC with global diagnostic capabilities. The research teams & ECMWF will develop a global operational medium-range forecast / assimilation capability for dynamics & composition, exploiting all available satellite data. The global forecasts wil l provide key information on long-range transport of air pollutants to the regional forecast models, through the forecast boundary conditions used by the regional systems. The improved regional forecasts will be used by air-quality authorities at city leve l, in dozens of cities across Europe. Based on the best science, the integrated forecast / assimilation capability will provide a powerful monitoring capability for greenhouse gases, reactive gases and aerosols. Sophisticated new inversion methods will be developed to infer surface fluxes of CO2 and other species through use of the surface flask data with the gridded atmospheric fields on transport & composition. The GEMS project will produce global retrospective analyses of the atmospheric dynamics and composition for the troposphere & stratosphere, and will be able to assess the impact of changes both on global & regional scale, examining extremes as well as means. The real-time & retros

Source : Cordis  

Seasonal distributions of aeolian iron fluxes to the global ocean
2001
Auteurs : P.G. Falkowski, Y. Gao, Yoram J. KAUFMAN, D. KOLBER et Didier TANRE
Masquer le résumé
Among the factors affecting the photosynthetic rate of marine phytoplankton, aeolian iron (Fe) fluxes appear to be critical in several large regions of the global ocean. Here we present an analysis of in situ aerosol iron data obtained from a wide variety of marine locations to quantify the seasonal Fe inputs to the global ocean. When extrapolated to the global ocean, our results indicate strong seasonal variations in aeolian Fe fluxes in different oceanic basins. The predominant fraction of the Fe inputs enters the oceans in the Northern Hemisphere, with the summer flux rates ca. twice those of winter. The high Fe fluxes in the Northern Hemisphere are concentrated in low and mid-latitudes. With the promising new data from MODIS aboard the Terra satellite, the linkage between Fe fluxes and phytoplankton biomass and productivity may be soon further quantified.
Keywords :
Ocean atmosphere interaction ; Aerosol deposition ; Iron ; Seasonal variation ; Phytoplankton ; World ocean ;
Source : Pascal - INIST  

Ultraviolet spectral irradiance in the French Alps : Results of two campaigns
1999
Auteurs : J. L. BOCQUET, Colette Brogniez, Jacqueline LENOBLE, D. MASSEROT et E. PACHART
Masquer le résumé
The ultraviolet spectral irradiance has been measured in the Alps in Briançon (altitude 1300 m asl) in July 1996 and March 1997, with the spectroradiometer of the University of Lille. The erythemal dose rate has been measured simultaneously with a broadband instrument. The aerosol optical depth, necessary as input for modeling, was measured with a Sun photometer. On cloudy days, irradiance is highly variable, with values exceeding those of clear days when the direct solar beam is not obstructed by clouds. For clear days, measured values are compared with the results of a radiative transfer model, and the influence of altitude and ground surface reflectance is analyzed. For the same solar zenith angle, irradiance in UVA is 8-10% higher in Briançon than in Brussels, half of the difference being due to the higher altitude of Briançon. Comparison of winter and summer values shows an amplification of ∼10-15% in winter owing to the snow reflectance; it can be explained by an effective reflectance of 0.3-0.4.
Keywords :
Solar radiation ; Ultraviolet radiation ; Irradiance ; Spectroradiometry ; Dose rate ; Clear sky ; Radiative transfer ; Observation data ; Comparative study ; Altitudinal distribution ; Ground surface ; Reflectance ; Alps ; France ; Europe ;
Source : Pascal - INIST  

Indirect radiative forcing due to aerosols over the North Atlantic region.
ACE-2: CLOUDYCOLUMN
1996 - 1998

Sujets :
Environmental Protection, Meteorology
Participants :
Laboratoire d'Aérologie
Laboratoire d'Aérologie


Laboratoire de Météorologie Physique
Laboratoire de Météorologie Physique


Laboratoire d'Optique Atmosphèrique
Laboratoire d'Optique Atmosphèrique


German Aerospace Center
German Aerospace Center


Secretary of State for Defence - Ministry of Defence
Secretary of State for Defence - Ministry of Defence


Freie Universitaet Berlin
Freie Universitaet Berlin


University of Manchester Institute of Science and Technology (umist)
University of Manchester Institute of Science and Technology (umist)


CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE FRANCE
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
Research

URA 1357 - GROUPE D'ETUDE DE L'ATMOSPHRE MTOROLOGIQUE - GAME Avenue Gustave Coriolis 42, C.N.R. MTtTorologique 31057
FRANCE
FREIE UNIVERSITAET BERLIN DEUTSCHLAND
FREIE UNIVERSITAET BERLIN
Education

INSTITUT FUER WELTRAUMWISSENSCHAFTEN (WE4) - FACHBEREICH GEOWISSENSCHAFTEN Fabeckstrasse 69 14195
DEUTSCHLAND
SECRETARY OF STATE FOR DEFENCE - MINISTRY OF DEFENCE UNITED KINGDOM
SECRETARY OF STATE FOR DEFENCE - MINISTRY OF DEFENCE
Research,Other

METEOROLOGICAL OFFICE FLIGHT RESEARCH D.E.R.A. Aerospace, Building Y 46 GU14 0LX
UNITED KINGDOM
University of Manchester Institute of Science and Technology (UMIST) UNITED KINGDOM
University of Manchester Institute of Science and Technology (UMIST)
Education

Department of Pure and Applied Physics Physics Department PO Box 88 Sackville Street M60 1QD
UNITED KINGDOM
Hide objectives
Cloudy-Column is one of five projects which constitute the European contribution to the second Aerosol Characterisation Experiment (ACE-2) of the International Global Atmospheric Chemistry Project (IGAC). Cloudy-Column is specifically dedicated to the study of the indirect effect. The objective is to develop parameterisations of marine extended stratocumulus for climate models, that include explicitly the characteristics of the aerosol background and their effects on cloud radiative properties.

Source : Cordis  

In-flight calibration of the POLDER polarized channels using the sun's glitter
1999
Auteurs : T. BAILLEUL, J.-L. Deuzé, O. HAGOLLE, M. HERMAN, Goloub PHILLIPPE et B. TOUBBE
Pas de résumé disponible
Keywords :
remote sensing ; polarization ; calibration ; reflectance ; roughness ; radiance ; accuracy ; satellite methods ; airborne methods ; atmosphere ; aerosols ; errors ;
Source : Pascal - INIST  

Retrieval of aerosol single-scattering albedo from ground-based measurements : Application to observational data
1998
Auteurs : C. DEVAUX, J.-L. Deuzé, P. Dubuisson, M. HERMAN, R. SANTER, M. VERBRUGGHE et A. VERMEULEN
Masquer le résumé
The single-scattering albedo ω0 of atmospheric aerosols is a key parameter concerning the effect of the particles on the Earth's radiative budget. Retrieval of this parameter from in situ measurements is a difficult task. We address the possibility to derive ω0 from ground-based measurements of solar transmission and diffuse skylight, independent of the knowledge of the aerosol properties or the absorption mechanism. The proposed method is based on the normalization of the aerosol phase function that is derived from scannings of the skylight. The method has been applied to a series of observations conducted during a few years over the french site of La Crau, near the industrial area of Fos sur Mer in the southeast of France. The aerosol albedo, retrieved near the 870 nm wavelength, ranges from 0.60 to 0.95. The estimated error is Δω0 ±0.05. To test their reliability, the retrieved ω0 have been used to calculate the diffuse/ total solar fluxes at ground level. These estimates are consistent within about 10% with independent direct/diffuse flux measurements performed simultaneously.
Keywords :
Aerosols ; Ground based measurement ; Albedo ; Measurement method ; Phase function ; France ; Europe ;
Source : Pascal - INIST  

Verification of aerosol models for satellite ocean color remote sensing
1998
Auteurs : Pierre-Yves Deschamps, Robert J. FROUIN et M. SCHWINDLING
Masquer le résumé
Direct atmospheric transmittance and sky radiance were measured spectrally at the coastal site of Scripps Institution of Oceanography pier in La Jolla, California, during the winters of 1993 and 1994. Direct atmospheric transmittance was also measured aboard R/V Wecoma and on Catalina Island during the 1994 California Cooperative Oceanic Fisheries Investigation winter cruise. The data were analyzed to (1) verify whether the aerosol models selected by Gordon and Wang [1994] for the sea-viewing wide field of view sensor are adequate for ocean color remote sensing from space and (2) identify what type of in situ atmospheric optics measurements should be performed to verify atmospheric correction algorithms. Aerosol optical thickness at 870 nm was generally low at La Jolla, with most values below 0.1 after correction for stratospheric aerosols. Values were even lower offshore (R/V Wecoma, Catalina Island), and no systematic correlation was found between aerosol characteristics and meteorological conditions. Therefore a mean background model, specified regionally, may be sufficient for ocean color remote sensing from space. For optical thicknesses above 0.1, two modes of variability characterized by Ångström coefficients of 1.2 and 0.5 and corresponding to tropospheric and maritime models, respectively, were identified in the measurements. The aerosol models selected by Gordon and Wang [1994] allow one to fit, within measurement inaccuracies, the derived values of Ångström coefficient and pseudo phase function (the product of single-scattering albedo and phase function), key atmospheric correction parameters. Importantly, the pseudo phase function can be derived from measurements of the Ångström coefficient. This means that shipborne Sun photometer measurements made at the time of satellite overpass are usually sufficient to verify the atmospheric correction of ocean color.
Keywords :
Air sea interface ; Aerosols ; Sea surface ; Remote sensing ; Transmittance ; Optical thickness ; Atmospheric correction ;
Source : Pascal - INIST  





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