Characterization of the boundary layer at Dome C (East Antarctica) during the OPALE summer campaign

• Published in: Atmospheric Chemistry and Physics
• Main Authors: Gallee, H., Preunkert, S., Argentini, S., Frey, M.M., Genthon, Christophe, Jourdain, Bruno, Pietroni, I., Casasanta, G., Barral, H., Vignon, E., Amory, C., Legrand, Michel
• Other Authors: Laboratoire de glaciologie et géophysique de l'environnement (LGGE), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS), Istituto di Scienze dell'Atmosfera e del Clima (ISAC), Consiglio Nazionale delle Ricerche Roma (CNR), British Antarctic Survey (BAS), Natural Environment Research Council (NERC), Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2015
• Subjects: [SDE]Environmental Sciences; Antarctic; Concordia Station; East Antarctica; Antarc*; Antarctica
• Online Access: https://hal-insu.archives-ouvertes.fr/insu-01204563; https://hal-insu.archives-ouvertes.fr/insu-01204563/document; https://hal-insu.archives-ouvertes.fr/insu-01204563/file/ATMOSPHERIC%20CHEMISTRY%20AND%20PHYSICS%20-%20Characterization%20of%20the%20boundary%20layer%20at%20Dome%20C%20during%20the%20OPALE%20summer%20campaign.pdf; https://doi.org/10.5194/acp-15-6225-2015

International audience Regional climate model MAR (Modèle Atmosphérique Régional) was run for the region of Dome C located on the East Antarctic plateau, during Antarctic summer 2011–2012, in order to refine our understanding of meteorological conditions during the OPALE tropospheric chemistry campaign. A very high vertical resolution is set up in the lower troposphere, with a grid spacing of roughly 2 m. Model output is compared with temperatures and winds observed near the surface and from a 45 m high tower as well as sodar and radiation data. MAR is generally in very good agreement with the observations, but sometimes underestimates cloud formation, leading to an underestimation of the simulated downward long-wave radiation. Absorbed short-wave radiation may also be slightly overestimated due to an underestimation of the snow albedo, and this influences the surface energy budget and atmospheric turbulence. Nevertheless, the model provides sufficiently reliable information about surface turbulent fluxes, vertical profiles of vertical diffusion coefficients and boundary layer height when discussing the representativeness of chemical measurements made nearby the ground surface during field campaigns conducted at Concordia station located at Dome C (3233 m above sea level).