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. (2015). A case study of a low-level jet during OPALE
. Atmospheric Chemistry and Physics, 15(11), 6237–6246.
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Gallée, H., S. Preunkert, S. Argentini, M. M. Frey, C. Genthon, B. Jourdain, I. Pietroni, G. Casasanta, H. Barral, E. Vignon, and M. Legrand. (2015). Characterization of the boundary layer at Dome C (East Antarctica) during the OPALE summer campaign. Atmos. Chem. Phys., 15, 6225–6236.
Abstract: 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).
Programme: 1013
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Slemr F, Angot H, Dommergue A, Magand O, Barret M, Weigelt A, Ebinghaus R, Brunke E-G, Pfaffhuber K A, Edwards G, Howard D, Powell J, Keywood M, Wang F, . (2015). Comparison of mercury concentrations measured at several sites in the Southern Hemisphere
. Atmos. Chem. Phys., 15(6), 3125–3133.
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T. A. Berhanu, J. Savarino, J. Erbland, W. C. Vicars, S. Preunkert, J. F. Martins, M. S. Johnson. (2015). Isotopic effects of nitrate photochemistry in snow: a field study at Dome C, Antarctica (Vol. 15).
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Legrand M, Preunkert S, Frey M, Bartels-Rausch Th, Kukui A, King M D, Savarino J, Kerbrat M, Jourdain B, . (2014). Large mixing ratios of atmospheric nitrous acid (HONO) at Concordia (East Antarctic Plateau) in summer: a strong source from surface snow?
. 1680-7316, 14(18), 9963–9976.
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Frey M M, Brough N, France J L, Anderson P S, Traulle O, King M D, Jones A E, Wolff E W, Savarino J, . (2013). The diurnal variability of atmospheric nitrogen oxides (NO and NO2) above the Antarctic Plateau driven by atmospheric stability and snow emissions
. ATMOSPHERIC CHEMISTRY AND PHYSICS, 13(6), 3045–3062.
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J. Kuttippurath, F. Lefevre, J.-P. Pommereau, H. K. Roscoe, F. Goutail, A. Pazmino, and J. D. Shanklin. (2013). Atmos. Chem. Phys., 13(3), 1625–1635.
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Pison I, Ringeval B, Bousquet P, Prigent C, Papa F, . (2013). Stable atmospheric methane in the 2000s: key-role of emissions from natural wetlands
. Atmos. Chem. Phys., 13(23), 11609–11623.
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Klonecki A, Pommier M, Clerbaux C, Ancellet G, Cammas J-P, Coheur P-F, Cozic A, Diskin G S, Hadji-Lazaro J, Hauglustaine D A, Hurtmans D, Khattatov B, Lamarque J-F, Law K S, Nedelec P, Paris J-D, Podolske J R, Prunet P, Schlager H, Szopa S, Turquety S, . (2012). Assimilation of IASI satellite CO fields into a global chemistry transport model for validation against aircraft measurements
. ATMOSPHERIC CHEMISTRY AND PHYSICS, 12(10), 4493–4512.
Abstract: This work evaluates the IASI CO product against independent in-situ aircraft data from the MOZAIC program and the POLARCAT aircraft campaign. The validation is carried out by analysing the impact of assimilation of eight months of IASI CO columns retrieved for the period of May to December 2008 into the global chemistry transport model LMDz-INCA. A modelling system based on a sub-optimal Kalman filter was developed and a specific treatment that takes into account the representativeness of observations at the scale of the model grid is applied to the IASI CO columns and associated errors before their assimilation in the model. Comparisons of the assimilated CO profiles with in situ CO measurements indicate that the assimilation leads to a considerable improvement of the model simulations in the middle troposphere as compared with a control run with no assimilation. Model biases in the simulation of background values are reduced and improvement in the simulation of very high concentrations is observed. The improvement is due to the transport by the model of the information present in the IASI CO retrievals. Our analysis also shows the impact of assimilation of CO on the representation of transport into the Arctic region during the POLARCAT summer campaign. A considerable increase in CO mixing ratios over the Asian source region was observed when assimilation was used leading to much higher values of CO during the cross-pole transport episode. These higher values are in good agreement with data from the POLARCAT flights that sampled this plume.
Programme: 416
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Gazeaux J, Bekki S, Naveau P, Keckhut P, Jumelet J, Parades J, David C, . (2012). Detection of particle layers in backscatter profiles: application to Antarctic lidar measurements
. 1680-7316, 12(7), 3205–3217.
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