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

• Published in: Atmospheric chemistry and physics Vol. 15; no. 11; pp. 6225 - 6236
• Main Authors: Gallée, H, Preunkert, S, Argentini, S, Frey, M. M, Genthon, C, Jourdain, B, Pietroni, I, Casasanta, G, Barral, H, Vignon, E, Amory, C, Legrand, M
• Format: Journal Article
• Language: English
• Published: Katlenburg-Lindau Copernicus GmbH 08-06-2015; European Geosciences Union; Copernicus Publications
• Subjects: Albedo; Albedo (solar); Antarctic radiation; Antarctica; Atmospheric boundary layer; Atmospheric turbulence; Boundary layer; Boundary layer height; Boundary layers; Climate models; Cloud formation; Clouds; Coefficients; Comparative analysis; Computer simulation; Diffusion coefficients; Diffusion layers; Domes; Energy (Physics); Energy budget; Environmental Sciences; Fluxes; Ice; Long wave radiation; Lower troposphere; Marine; Meteorological conditions; Polar environments; Profiles; Radiation; Radiation data; Regional; Regional climate models; Regional climates; Sea level; Short wave radiation; Simulation; Summer; Summer climates; Surface energy; Surface properties; Troposphere; Tropospheric chemistry; Turbulence; Turbulent fluxes; Vertical diffusion; Vertical profiles; Winds; Antarctica; PSE, Antarctica, East Antarctica; Antarctica, East Antarctica, Antarctic Plateau, Dome C
• ISSN: 1680-7324; 1680-7316; 1680-7324
• DOI: 10.5194/acp-15-6225-2015

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).