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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: review article 04 Nov 2019

Submitted as: review article | 04 Nov 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Measurement Techniques (AMT).

Cézeaux-Aulnat-Opme-Puy De Dôme: a multi-site for the long term survey of the tropospheric composition and climate change

Jean-Luc Baray1,2, Laurent Deguillaume1,2, Aurélie Colomb1, Karine Sellegri1, Evelyn Freney1, Clémence Rose1, Joël Van Baelen1,3, Jean-Marc Pichon1,2, David Picard1, Patrick Fréville2, Laetitia Bouvier1,2, Mickaël Ribeiro1, Pierre Amato4, Sandra Banson1, Angelica Bianco1,4, Agnès Borbon1, Laureline Bourcier1, Yannick Bras1, Marcello Brigante4, Philippe Cacault2, Aurélien Chauvigné1,5, Tiffany Charbouillot1,4, Nadine Chaumerliac1, Anne Marie Delort4, Marc Delmotte6, Régis Dupuy1, Antoine Farah1, Guy Febvre1, Andrea Flossmann1, Christophe Gourbeyre1, Claude Hervier2, Maxime Hervo1,7, Nathalie Huret1,2, Muriel Joly1,4, Victor Kazan6, Morgan Lopez6, Gilles Mailhot4, Angela Marinoni1,8, Olivier Masson9, Nadège Montoux1, Marius Parazols1,4, Frédéric Peyrin2, Yves Pointin1, Michel Ramonet6, Manon Rocco1, Martine Sancelme4, Stéphane Sauvage10, Martina Schmidt6,11, Emmanuel Tison10, Mickaël Vaïtilingom1,4,12, Paolo Villani1, Miao Wang1, Camille Yver-Kwok6, and Paolo Laj8,13 Jean-Luc Baray et al.
  • 1Université Clermont Auvergne, CNRS, Laboratoire de Météorologie Physique, UMR6016, Clermont Ferrand, France
  • 2Université Clermont Auvergne, CNRS, Observatoire de Physique du Globe de Clermont Ferrand, UMS 833, Clermont Ferrand, France
  • 3Université de la Réunion, CNRS, Météo-France, Laboratoire de l’Atmosphère et des Cyclones, UMR 8105, St Denis de la Réunion, France
  • 4Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, UMR 6296, Clermont-Ferrand, France
  • 5Université Lille, CNRS, Laboratoire d’Optique Atmosphérique, UMR 8518, Villeneuve d'Ascq, France
  • 6Université Paris-Saclay CEA-CNRS-UVSQ, Laboratoire des Sciences du Climat et de l’Environnement, UMR 8212, Gif-sur-Yvette, France
  • 7MeteoSwiss, Payerne, Switzerland
  • 8Institute for Atmospheric Sciences and Climate, National Research Council, Bologna, Italy
  • 9Institut de Radioprotection et de Sûreté Nucléaire, Saint Paul lez Durance, France
  • 10IMT Lille Douai, Univ. Lille, SAGE –Département Sciences de l’Atmosphère et Génie de l’Environnement, Lille, France
  • 11Institut für Umweltphysik, University of Heidelberg, Heidelberg, Germany
  • 12Université des Antilles, Laboratoire de Recherche en Géosciences et Energies, EA 4539,Pointe-à-Pitre, Guadeloupe, France
  • 13University Grenoble-Alpes, CNRS, IRD, INPG, IGE UMR 5001, Grenoble, France

Abstract. For the last twenty-five years, CO-PDD (Cézeaux-Aulnat-Opme-puy de Dôme) has evolved to become a full instrumented platform for atmospheric research. It is nationally accredited by CNRS, the French national center for scientific research, and recognized as a global station in the GAW network (Global Atmospheric Watch). It is a reference site of the European and national research infrastructures ACTRIS (Aerosol Cloud and Trace gases Research Infrastructure) and ICOS (Integrated Carbon Observing System). The site located on-top of the puy de Dôme mountain (1465 m a.s.l.) is completed by additional sites located at lower altitudes and adding the vertical dimension to the atmospheric observations: Opme (660 m a.s.l.), Cézeaux (410 m) and Aulnat (330 m). On the sites has been developed a unique combination of in-situ and remote sensing measurements capturing and documenting the variability of particulate and gaseous atmospheric composition, but also the optical, biochemical and physical properties of aerosol particles, clouds and precipitations. Given its location far away from any major emission sources, its altitude and the mountain orography, the puy de Dôme station is ideally situated to sample different air masses in the boundary layer or in the free troposphere depending on time of day and seasons. It is also an ideal place to study cloud properties with frequent presence of clouds at the top in autumn and winter. As a result of the natural conditions prevailing at the site and of the very exhaustive instrumental deployment, scientific studies at puy de Dôme strongly contribute to improving the knowledge in atmospheric sciences including the characterization of trends and variability, the understanding of complex and interconnected processes (microphysical, chemical, biological, chemical and dynamical) and providing a reference point for climate models. In this context, CO-PDD is a pilot site to conduct instrumental development inside its wind tunnel for testing liquid/ice cloud probes in natural conditions, or in-situ systems to collect aerosol and cloud. This paper reviews 25 years (1995–2020) of atmospheric observation at the station, and related scientific research contributing to atmospheric and climate science.

Jean-Luc Baray et al.
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Jean-Luc Baray et al.
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Short summary
CO-PDD (Cézeaux-Aulnat-Opme-puy de Dôme) is a full instrumented platform for atmospheric research. The 4 sites located at different altitudes from 330 to 1465 m around Clermont-Ferrand (France) host in-situ and remote sensing instruments to measure atmospheric composition, including long term trends and variability, to study interconnected processes (microphysical, chemical, biological, chemical and dynamical) and to provide a reference point for climate models.
CO-PDD (Cézeaux-Aulnat-Opme-puy de Dôme) is a full instrumented platform for atmospheric...