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

Jean-Luc Baray 1 Laurent Deguillaume 2 Aurélie Colomb 2 Karine Sellegri 2 Evelyn Freney 2 Clémence Rose 2 Joël van Baelen 2 Jean-Marc Pichon 3 David Picard Patrick Fréville 4 Laetitia Bouvier 2 Mickaël Ribeiro 2 Pierre Amato 5 Sandra Banson 4 Angelica Bianco 5, 2 Agnès Borbon 6 Lauréline Bourcier 2 Yannick Bras Marcello Brigante 5 Philippe Cacault 4 Aurélien Chauvigné 7 Tiffany Charbouillot 2, 5 Nadine Chaumerliac 5 Anne-Marie Delort 5 Marc Delmotte 8, 9 Régis Dupuy 2 Antoine Farah 2 Guy Febvre 2 Andrea Flossmann 2 Christophe Gourbeyre 2 Claude Hervier 4 Maxime Hervo 10 Nathalie Huret 2 Muriel Joly 2, 5 Victor Kazan 8, 9 Morgan Lopez 8, 9 Gilles Mailhot 5 Angela Marinoni 11 Olivier Masson 12 Nadège Montoux 13 Marius Parazols 5 Frederic Peyrin 14 Yves Pointin 15 Michel Ramonet 8, 9 Manon Rocco Martine Sancelme 5 Stéphane Sauvage 16 Martina Schmidt Emmanuel Tison 17 Mickaël Vaitilingom 2, 5 Paolo Villani 2 Miao Wang 2 Camille Yver-Kwok 8, 18 Paolo Laj 19
Abstract : For the last 25 years, CO-PDD (Cézeaux-Aulnat-Opme-puy de Dôme) has evolved to become a full instrumented platform for atmospheric research. It has received credentials as a national observing platform in France and is internationally recognized as a global station in the GAW (Global Atmosphere Watch) network. It is a reference site of 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). The integration of different sites offers 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 located 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 fall and winter. As a result of the natural conditions prevailing at the site and of the very exhaustive instrumental deployment, scientific studies at the puy de Dôme strongly contribute to improving 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 the provision of reference information for climate/chemistry models. In this context, CO-PDD is a pilot site to conduct instrumental development inside its wind tunnel for testing liquid and 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.
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Jean-Luc Baray, Laurent Deguillaume, Aurélie Colomb, Karine Sellegri, Evelyn Freney, et al.. Cézeaux-Aulnat-Opme-Puy De Dôme: a multi-site for the long-term survey of the tropospheric composition and climate change. Atmospheric Measurement Techniques, European Geosciences Union, 2020, 13 (6), pp.3413-3445. ⟨10.5194/amt-13-3413-2020⟩. ⟨hal-02883526⟩

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