Jean JOUZEL, Palaeoclimatologist, former vice-chair of the IPCC, member of the French Academy of Sciences.

Wolfgang CRAMER, lead author of IPCC Working Group 2, CNRS research director, ecologist

Magali REGHEZZA, member of the French High Council on Climate, geographer, member of the Centre de Formation sur l’Environnement et la Société de l’ENS (Centre for Environmental and Social Studies)

Jean-Baptiste SALLEE, IPCC Author, CNRS Research Director, oceanographer

Christophe CASSOU, co-author of the 6th IPCC report, CNRS research director, climatologist

Yamina SAHEB, lead author of IPCC group 3, PhD in energy, expert in climate change mitigation policies

Agnès DUCHARNE, hydroclimatologist, CNRS research director

Jean-Louis DUFRESNE, co-author of the 5th and 6th IPCC reports, CNRS research director, climatologist

Michael GHIL, climatologist, physicist and mathematician, professor Emeritus at the Ecole Normale Supérieure, Member of the Academia Europaea, Alfred Wegener Medalist of the European Geosciences Union

Heidi SEVESTRE, glaciologist, member of the Arctic Monitoring and Assessment Programme, working group of the Arctic Council

Xavier CAPET, CNRS Research Director, oceanographer

Elodie VERCKEN, Director of Research in Ecology, INRAE

Juliette MIGNOT, IRD Research Director, climatologist

Benjamin SULTAN, IRD Research Director, climatologist

François COLAS, IRD Research Director, oceanographer

Jérôme VIALARD, IRD Research Director, Oceanographer and Climatologist

Sébastien LEBONNOIS, CNRS Research Director, planetologist

Etienne BERTHIER, Glaciologist at the CNRS, Midi Pyrénées Observatory

Stéphanie BONIFACE, Carbon Footprint Project Manager, Institut Pierre Simon Laplace, CNRS

Rémi LAXENAIRE, CNES post-doctoral researcher at the University of La Réunion, oceanographer

Niels DUTRIEVOZ, PhD student at the Laboratory of Climate and Environmental Sciences (LSCE)

Philippe NAVEAU, PhD student, CNRS, LSCE

Lionel GOURDEAU, IRD Research Director, oceanographer

Catherine AUBERTIN, Research Director, IRD, environmental economist

David LABAT, University Professor, hydrogeologist, Toulouse 3 University

Xavier MARI, IRD Research Director, oceanographer

Sébastien BAROT, IRD Research Director, ecologist

Serge JANICOT, Research Director, IRD

Sara Labrousse LOCEAN, CNRS Research Fellow, ecologist

Philippe SOLANO, IRD, Director of UMR Intertryp IRD-Cirad

Dr Sarah DUMONT, oncologist

Yann COHEN, Postdoctoral researcher in atmospheric chemistry (LSCE)

Marie-Paule BONNET, IRD Research Director, UMR Espace-Dev

Renaud PERSON, IRD research engineer, oceanographer

Pascal MAUGIS, researcher at LSCE

Dr Frédéric C. DO, PhD, HDR, Plant Water Ecophysiology, Ecohydrology, Agroecology, Agroforestry

Lucile GUERIN, Climate Project Officer at IRD.

Robin ROLLAND, PhD student in oceanography.

Valentin MARON, researcher in climate didactic physics 

Christophe LOUP, Assistant Chemical Engineer, CNRS.

Sophie GODIN-BEEKMANN, Director of Research in Atmospheric Physics, CNRS

Céline GUILLOIT, Research Officer

Maxime REJOU-MECHAIN, Ecologist at the Institut de Recherche pour le Développement, Research Officer.

Raphael LEBLOIS, INRAE Montpellier researcher

Olga OTERO, University Professor, Evolution & Palaeontology

Lise DESVALLEES, Senior Lecturer and researcher at the University of Pau and the Pays de l’Adour Post-doctoral researcher at the PASSAGES Laboratory

Jacques LE BOURLOT, Professor Emeritus (Physics/Astrophysics) at Université Paris-Cité and Observatoire de Paris

Albane BARBERO, Research Engineer – Institute of Environmental Geosciences of the Environment

Rémi VALOIS, MdC Senior Lecturer and Researcher, Hydrogeology and Geophysics, EMMAH Laboratory – Univ. Avignon

Laurent DRAPEAU, Applied Mathematics Research Engineer, IRD

Nicolas DELPIERRE, Professor of Forest Ecology, Université Paris-Saclay

Sylvain GLÉMIN, CNRS Research Director

Claire CHATELAIN, CNRS Research Fellow, Centre R. Mousnier Centre/Sorbonne University

Jean-Luc GOUZE, DR Inria, Sophia-Antipolis

Éric LOMBAERT, INRAE Research Engineer

Patrick GANSTER, Senior Lecturer and Researcher, ITM

Jim GRISILLON, PhD student in atmospheric chemistry at the LCE (Laboratoire deChimie de l’Environnement) at the University of Aix-Marseille.

Guillaume BLANC, Senior Lecturer in physics, Université Paris Cité

Olivier FREROT, Chief Engineer, Ponts et Chaussées, Lecturer and essayist

Arthur LEBLOIS, CNRS Research Director

Constance VALENTIN, Research fellow, Physicist

Alain FUMENIA, Post-doctoral researcher at the Oceanology and Geoscience Laboratory

Gilles ARNOLD, Senior Lecturer at the University of Haute Alsace

Jean-Christophe POGGIALE, Professor, Université de la Méditerranée, member of the Microbiology, Geochemistry and Marine Ecology Laboratory at the Marseille Oceanology Centre.

Simon BENHAMOU, CNRS Research Director

Thierry MENAND, Senior Lecturer at the University of Clermont Auvergne, Doctor of Internal Geophysics

Sara LABROUSSE, postdoctoral researcher, specialist in marine ecology, CNRS

Cécile APPERT, Research Director, CNRS

Audrey TAILLEFER, Post-doctoral researcher in Geosciences

Laurent PAGANI, Astrophysicist, CNRS Research Director

Tanguy FARDET, Research Fellow, OCAPI Programme, LEESU, ENPC

Simon BOITARD , Research Fellow, INRAE

Nicolas GRANER, Head of scientific mediation, Université Paris-Saclay

Daniel EPRON, Professor, Kyoto University, Université de Lorraine, Faculty of Agriculture

Patrick DUNCAN, Former Research Director, CNRS Labo de Chizé.

Rémi GAILLARD, PhD student in climate science

Olivier COQ, CNRS Researcher

James COSTA, University Professor, Sorbonne Nouvelle University

Thierry WINKEL, Researcher, IRD

Fabien MALBET, Research Director, Deputy Director of the Observatoire des Sciences de l’Univers de Grenoble, Univ. Grenoble Alpes.

Claire WAELBROECK, CNRS Research Director in palaeoclimatology and oceanography.

Laurent PERRIN, CNRS Research Director

Jérôme FONTANE, Teacher-researcher, engineering sciences

Patricia GARNIER, INRAE Research Director

Philémon AUTIN, Postdoctoral researcher, Grenoble Institute of Environmental Geosciences

Pascal BARLA, INRIA Research Fellow

Denis LOUSTAU, INRAE Research Director

Nicolas PERRY, University Professor, member of the Ecodesign of Sustainable Systems Network

Nicolas GRATIOT, IRD Research Director, geophysicist, Deputy Director of the IGE

David MONTAGNE, Senior Lecturer and researcher, AgroParisTech

Raia-Silvia MASSAD, INRAE Research Fellow, UMR Ecosys

Kaïna PRIVET, Ecologist

Xavier ROBERT, Research fellow, IRD Grenoble

Haye VAN DER WERF, INRAE Research Engineer

Fanny DOMMANGET, Researcher in the ecology of plant invasions

Laurent BETERMIN, Senior Lecturer at the Institut Camille Jordan

Nathalie GEORGE, CNRS Research Director

Bruno FADY, INRAE Research Director

Christine LAUZERAL, Doctor of Ecology, Evolution and Biological Diversity Laboratory – Paul Sabatier University

Guillaume SESCOUSSE, INSERM Research Fellow

Benoit HINGRAY, hydroclimatologist, CNRS researcher

Odile FOSSATI, ecologist, IRD

Camille LEPOITTEVIN, Research engineer, BIOGECO unit, INRAE

Thierry MOUTIN, Professor, Mediterranean Institute of Oceanography

Marie LAUNAY, Deputy Director of the AgroClim Unit, INRAE

Sébastien TRIQUENEAUX, Néel Institute, CNRS

Sylvia PARDONNET, AI studies of geo-natural and man-made environments, IPHC

Joachim THIEBAUT, PhD student in biology and ecotoxicology

Julie PERRIN, Professor, Université Paris 8 Saint-Denis

Luis GARCIA ALLES, CNRS Researcher

Béatrice MARTICORENA, CNRS Research Director, Atmospheric physical chemist

Julie LE GALLO, University Professor in agriculture, Institut Agro Dijon

Frédéric LEGENDRE, Senior Lecturer, Institute of Systematics, Evolution and Biodiversity

Nicolas BEZ, Director of Research, IRD

Boris LEROY, Senior Lecturer, Muséum d’Histoire Naturelle, specialising in Biogeography of Global Change

Aurélie CHARRON, Sustainable Development Research Officer

Aurélien PAULMIER, Researcher in marine biochemistry

Antoine LEBLOIS, Researcher at INRAE

Michel BLAY, Honorary Research Director, CNRS

Lucie ZINGER, Senior Lecturer, Biology Institute of the Ecole Normale Supérieure, Ecology and Evolutionary Biology Section

Laurence DESPRES, Professor, Grenoble Alpes University, Alpine Ecology Laboratory,

Marc PANANCEAU, Teacher-researcher, Université Paris-Saclay

Mathieu MANGEOT, Teacher-researcher in Sustainability Sciences

Patrick CHAUVIN, STI teacher in CPGE, Montauban

Patrick CHAMES, CNRS Research Director, Marseille

Roméo HATCHI, Research engineer at the CEA, mathematician

Myriam QUATRINI, Associate Professor, University of Aix-Marseille

Pascal HOUILLIER, Professor of Physiology, Université Paris Cité

Philippe ROCHE, CNRS Researcher, Grenoble

Jean CHAMEL, Anthropologist, University of Lausanne

Sarah KADA, Postdoctoral researcher

Didier ORANGE, IRD Researcher, Ecohydrologist

François BOUSQUET, CIRAD researcher

Odin MARC, CNRS Researcher, Geosciences Environment Toulouse

Thomas RUPP, Senior Lecturer, Université Savoie Mont Blanc

Valérie D’ACREMONT GENTON, Professor of Global and Environmental Health, University of Lausanne

Sophie GERBER, Researcher, INRAE, Bordeaux

Romain COUILLET, Professor at Grenoble-Alpes University

Flavien LABRE, R&D engineer in soil decontamination 

Serge RENOUARD, R&D Director

Caroline ZANCHI, Post-doctoral biologist

François BONHOMME, Research Director, University of Montpellier

Jean-Louis MARTIN, Emeritus Research Director, CNRS

Anne-Marie DARE, Teacher-researcher in physics, Aix-Marseille University

Paul SAVARY, Post-doctoral researcher in ecology, Department of Biology, Concordia University

Pierre-Henri GOUYON-SION, Professor Emeritus, Muséum National d’Histoire Naturelle

Olivier TALAGRAND, Honorary Research Director at the CNRS, Laboratoire de Météorologie Dynamique, Geosciences Department, Institut Pierre-Simon Laplace

Jean-Luc PEIRY, Professor UCA, University of Clermont Auvergne

Charling TAO, Emeritus Research Director CNRS

Patrick PETITJEAN, Paris Astrophysics Institute

Christelle PLUVINET, Naturalist technician

Emmanuel KRIEGER, PhD student in Sustainability Sciences, INRIA

Marina PAVLIDES , Scientific Documentalist 

Michelle LECOLLE, Professor, Paris 3 Sorbonne Nouvelle

Fabien PERDU, expert at CEA

Delphine MOUSSARD, Senior Lecturer at the University of Aix-Marseille

Josyane RONCHAIL, Climatologist – LOCEAN

Laurent MANIVEL, Research Director, CNRS

Claudine GUERINI-TOUVIER, Associate Professor

Harry BERNAS, Physicist, CNRS Research Director

François DULAC, CEA Researcher-Engineer in Climate and Environmental Sciences

Cécile MEUNIER, PRAG University of Rennes

Marie GRANGE, PhD, Grenoble Alpes University

Damien CARTRON, CNRS Research Engineer, Maurice Halbwachs Centre

Lilian BLANC, Environmental Sciences researcher, CIRAD

Sandra BARANTAL, post-doctoral researcher in soil ecology, Centre D’Ecologie Fonctionnelle et Évolutive, Montpellier

Sylvie FERRARI, Professor of Ecological Economics, University of Bordeaux

Louisiane BURKART, eco-epidemiologist for the French Polar Institute, French Southern and Antarctic Territories

Fabien HOBLEA, teacher-researcher in environmental geography

Michel PETERSCHMITT, Researcher in Plant Virology

Camille ROSSIGNOL, Department of Chemical and Geological Sciences, University of Cagliari

Frédéric REES, Research Fellow, INRAE

Pauline GARNIER-GERE, Research Fellow, INRAE

Lounès CHIKHI, CNRS Research Director, Evolution and Biological Diversity Laboratory, Toulouse III University

Corinne CHARBONNEL, Astrophysicist, CNRS Research Director and Ordinary Professor

Bernard SCHÉOU, Senior Lecturer, IAE/University of Perpignan

Aude VALADE, Researcher, CIRAD, UMR Functional Ecology and Biogeochemistry of Soils and Agroecosystems, Montpellier

Claude MARANGES, Professor, National Institute of Applied Sciences, Toulouse

Yves RICHARD, Professor, University of Boulogne, Climatology Research Centre

Enrique BARRIUSO, Research Director, INRAE

Yona SILVY, Oceanographer, postdoctoral researcher at the University of Bern

Adrienne RESSAYRE, INRAE researcher

Guillaume CHAGNAUD, post-doctoral researcher in hydro-climatology

Steven RENDON RESTREPO, post-doctoral researcher at the Leibniz-Institut für Astrophysik Potsdam (AIP)

Jeanne GHERARDI SCAO, teacher-researcher UVSQ/LSCE

François AGUILLON, Professor Emeritus of Physics, Université Paris-Saclay

Geoffroy AUBRY, Research fellow CNRS, Institut de Physique de Nice

Sakina-Dorothée AYATA, Senior Lecturer in marine ecology at Sorbonne University

Silvia DE MONTE, CNRS Research Fellow, Biology Institute, ENS

Thierry LEBEL, IRD Research Director

Vincent MOULIN, PhD student in forest ecology at the ECODIV USC INRAE Laboratory

Tristan LAFONT RAPNOUIL, CNRS PhD student

Benoît FONTAINE Research Engineer, Muséum national d’Histoire naturelle, Centre d’Écologie et des Sciences de la Conservation

Casimir DE LAVERGNE, CNRS research fellow, oceanographer

Thomas HERMILLY, PhD student in physical oceanography and biogeochemistry at LOPS

Géraldine BOCQUEHO, INRAE Research Fellow

Mélanie GRENIER, CNRS research fellow, oceanographer

Noam BLOCH, PhD student, Hydraulic engineer, Grenoble Alpes University.

Yannick BIARD, Director of the MEANS multi-criteria evaluation platform and Head of the Environmental Analysis of Agricultural and Food Products project.

Fabrice HERNANDEZ, IRD Research Fellow, oceanographer.

Emmanuel WICKER, HDR Researcher, International Centre for Agricultural Research for Development

Rosemary MORROW, CNAP oceanographer at LEGOS, oceanographer

Claire LEVY CNRS Research Engineer, Oceanographer

Odile PONCY, Botany, Honorary IR CNRS, MNHN, National Museum of Natural History

Mickael CORIAT, Astrophysicist, IRAP, Toulouse

Sylvain CHARLAT, CNRS Researcher, Lyon 1 University.

Julie AUGUSTIN, Post-doctoral researcher in ecology

Matthias BEEKMANN, CNRS Research Director

Florence GAUNET, Researcher, CNRS

Géraldine SARRET, CNRS Research Director, Institute of Earth Sciences

Cyril PANNETIER, post-doctoral researcher at the Observatoire Côte d’Azur (OCA)

Pierre GERARD, Senior Lecturer at AgroParisTech, Institut Diversité, Écologie et Évolution du Vivant (IDEEV)

Pascal GUÉNEL, Research Director, INSERM

Cécile TANNIER, Geographer, CNRS Research Director

Bertrand PLEZ, Professor, Laboratoire Univers et Particules de Montpellier

Marie-Lazarine POULLE , Research Engineer, URCA

Pierrick PENVEN- IRD Research Director – Oceanographer

Fabienne BARATAUD, INRAE Research Engineer

Albert HERTZOG, Teacher-Researcher, LMD, Sorbonne-Université, Laboratoire de Météorologie Dynamique

Antoine BIERJON, CNRS research engineer, planetology

Marine LANET, PhD student at the Laboratoire de Météorologie Dynamique

Aymeric SPIGA, Senior Lecturer at Sorbonne University, Climatologist / Planetologist

Laurent FAIRHEAD, Research Engineer, Laboratoire de Météorologie Dynamique

Marion SAINT-LU, CNRS post-doctoral researcher, climatologist

Cathlee PETIT, post-doctoral researcher in ecology

Dr Sara FLEURY, CNRS Research Engineer

Clémence PERRIN-MALTERRE, Senior Lecturer – HDR, UFR Sciences et Montagne, Deputy Director of the EDYTEM laboratory

Laure VIEU, CNRS Research Director

Alban PLANCHAT, PhD student, Oceanographer

Marie-Alice FOUJOLS, Research Engineer, Climate Modelling, CNRS

Sébastien PAYAN, Deputy Scientific Director of AERIS, Researcher at the Laboratoire Atmosphères Milieux Observations Spatiales

Camille RISI, CNRS research fellow, climatologist

Martin TURBET, CNRS research fellow, Laboratoire de Météorologie Dynamique

Eric FAUDRY, Microbiology researcher

Johan PARRA Research engineer, Laboratoire de Météorologie Dynamique

Louise FOUQUEAU- Post-doctoral researcher in Evolutionary Biology, ISTA (Institute of Science & Technology Austria – University of Basel)

Najda VILLEFRANQUE, CNRS research fellow, climate physicist

Andrea M. DOGLIOLI, Senior Lecturer HDR, Mediterranean Institute of Oceanography

Julien SARRON, Research agronomist, CIRAD

Florian MAUMUS- Research Director, INRAE

Riwal PLOUGONVEN, Professor and Deputy Director of the Laboratoire de Météorologie Dynamique, Ecole Polytechnique

Pascal BONNEFOND, Astronomer, Observatoire de Paris – SYRTE

Cédric SUEUR, Senior Lecturer in Ethology and Animal Ethics, University of Strasbourg

Agathe HELLICH, Environmental Sciences Engineer

Arnaud CHIFFAUDEL, Researcher in Complex Systems Physics

Méril MASSOT, Postdoctoral researcher in microbiology at the Centre for Evolutionary and Functional Ecology, CNRS

Claire DOUTRELANT, CNRS researcher in Evolutionary Ecology

Juliane FLOURY, Professor of Process Engineering, Agrocampus Ouest Rennes

Gwenael RABUT, Biologist, Research Fellow

Laure PECQUERIE, IRD Research Fellow, LEMAR, Brest

Celine SCORNAVACCA, Research Director, CNRS, Montpellier

Dominique DESCLAUX, Researcher in agronomy and plant improvement – INRAE Montpellier

Stéphane MOUNIER, Senior Lecturer, University of Toulon, Geochemist.

Hélène CASTEBRUNET, Senior Lecturer and researcher in urban hydrology, Institute of Environmental Geosciences

Hélène CHAUVEAU, Geographer, researcher associated with the Rural Studies Laboratory

Jean GUILLARD, IR – HDR – Univ. Savoie Mont Blanc, INRAE

Pierre SALOU, CEA Engineer, Large National Heavy Ion Accelerator

Jérémie CAVÉ, IRD researcher, Toulouse

Vincent PRADIER, PhD student, IAE, University of Paris 1

Océane FOIX, Researcher in Seismology

Guillaume GUIMBRETIERE, CNRS Research Fellow, Atmosphere and Cyclones Laboratory

Loïc SALMON, CNRS Researcher, Biophysics

Jean-Christophe HAMILTON, CNRS Research Director, APC (AstroParticle and Cosmology) Laboratory, Paris

Laurène FEINTRENIE, Agronomy and geography researcher at CIRAD, ECOSUR, Campeche, Mexico

Jean-Baptiste DURAND, CIRAD researcher

Julie RIEGEL, Research fellow in anthropology

Daniele ROMANINI, CNRS Research Director, LIPhy – Laboratory of Interdisciplinary Physics

Marwan NACIRI, PhD student in ecology, CEFE University of Montpellier

Yasmine LALAU, Teacher-researcher

Emmanuelle KESSE-GUYOT, INRAE Research Director

Nathalie FROMIN, CNRS research fellow

Gilles RAMSTEIN Research Director, CEA, Climate and Environmental Sciences Laboratory

Guillaume PITON, geoscience research fellow, IGE laboratory

Benjamin GRELIER, hydrology researcher

André MOUNIER, PhD student, ADEME (CIRED/LMD)

Edouard KLEINPETER, CNRS research engineer, Bordeaux

Aude CARRERIC, post-doctoral researcher in climate sciences.

Laurent HUSSON, CNRS Research Director

Vincent LHUILLIER, Senior Lecturer, University of Lorraine

Viviane BALADI, Research Director, CNRS, Sorbonne University

Benjamin MAUROY, Research Director, CNRS

Elsa ABS, Researcher, Laboratory of Climate and Environmental Sciences (LSCE)

François DULAC, CEA Researcher-Engineer in Climate and Environmental Sciences, Paris-Saclay

Philippe LESAGE, Senior Lecturer in Earth Sciences, Savoie Mont Blanc University

Soizic ROCHANGE, Senior Lecturer, Toulouse 3 University

Gabriel HES, PhD student in climate and forest sciences, EDB, University of Toulouse

Kévin JEAN, Senior Lecturer in Epidemiology, MESuRS Laboratory

Théophile TRUCHIS, Physics Centre (CPHT – Polytechnique), Mathematical Physics team, PhD student in evolution modelling

Gaëlle LETORT, CNRS Research Engineer, Institut Pasteur Paris

Andrée DE BACKER, Researcher, University of Lille

Pierre-François VAQUIÉ, Agricultural engineer

Florence VOLAIRE, Research Fellow, French National Research Institute for Agriculture, Food and the Environment

Laurent RIOU, Research Fellow, INSERM

Julien MILLI, Assistant Astronomer, Grenoble Institute of Palaeontology and Astrophysics

Arnaud POUBLAN-COUZARDOT, Neuroscientist, post-doctoral fellow, INSERM

Victor ALTMAYER, Doctor in neurology at the Pitié-Salpêtrière Hospital, doctoral student in cognitive neuroscience at the Brain Institute.

Matthieu CHASSE, Senior  Lecturer, PhD in geosciences. Institute of Mineralogy, Materials Physics and Cosmochemistry, Sorbonne University.

Gilles ARMANI, anthropologist

Mireille NAVARRETE, INRAE Research Director

Christian PAROISSIN, Senior Lecturer, Université de Pau et des Pays de l’Adour

Annette BERARD, Researcher in microbial ecology

Bertrand CARISSIMO, Senior researcher at the Atmospheric Environment Teaching and Research Centre

Claire COULY, Project Manager, Réseau national des Maisons des Sciences de l’Homme, support for the “health and environmental crises” mechanism

Patrick CASSAM-CHENAI, CNRS Research Director

Laure HOSSARD, Research agronomist, INRAE, UMR Innovation Montpellier

Simon MUNIER, Hydrometeorology researcher at Météo France

Louise VAN OUDENHOVE, INRAE research fellow

Rémi SERVIEN, INRAE Research Fellow

Hugo MATHE-HUBERT, postdoctoral fellow, CNRS, researcher in Evolutionary Ecology

Maurine MONTAGNAT, Research Director, CNRS

Bernard TOURANCHEAU, Professor, Grenoble Alpes University

David NERINI, Senior Lecturer, Mediterranean Institute of Oceanography

Pascal BRUNET, CNRS engineer

Jean-Marc BONNEVILLE, CNRS Research Fellow, Alpine Ecology Laboratory

Gaëlle CAPITAINE, PhD student in chemical oceanography, Laboratoire National de Métrologie et d’Essais, Mediterranean Institute of Oceanography

Damien SOUS, Oceanographer, MIO

Pierre-Pol LIEBGOTT, Research Fellow

Nadège FONVIEILLE, PhD student in oceanography at MIO

Bruno ZAKARDJIAN Professor, University of Toulon, Mediterranean Institute of Oceanology

Xavier FAIN, climatologist at the CNRS