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Dommergue Aurelien, Larose Catherine, Fain Xavier, Clarisse Olivier, Foucher Delphine, Hintelmann Holger, Schneider Dominique, Ferrari Christophe P,. (2010). Deposition of Mercury Species in the Ny-Ålesund Area (79°N) and Their Transfer during Snowmelt. Environ. Sci. Technol., 44(3), 901–907.
Abstract: Arctic snowpacks are often considered as temporary reservoirs for atmospheric mercury (Hg) deposited during springtime deposition events (AMDEs). The fate of deposited species is of utmost importance because melt leads to the transfer of contaminants to snowmelt-fed ecosystems. Here, we examined the deposition, fate, and transfer of mercury species (total Hg (THg) and methylmercury (MeHg)) in an arctic environment from the beginning of mass deposition of Hg during AMDEs to the full melt of the snow. Following these events, important amounts of THg were deposited onto the snow surface with concentrations reaching 373 ng·L-1 and estimated deposition fluxes of 200-2160 ng·m-2. Most of the deposited Hg was reemitted to the atmosphere via photochemical reactions. However, a fraction remained stored in the snow and we estimated that the spring melt contributed to an input of 1.5-3.6 kg·year-1 of THg to the fjord (i.e., 8-21% of the fjord’s THg content). A monitoring of MeHg in snow using a new technique (DGT sensors) is also presented.
Programme: 399
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Bonadonna F., Villafane M., Bajzak C. & Jouventin P. (2004). Recognition of burrow’s olfactory signature in blue petrels, Halobaena caerulea: an efficient discrimination mechanism in the dark. Animal behaviour, 67, 893–898.
Abstract: Previous work has shown that blue petrels need olfaction to home. We investigated whether they also recognize an olfactory signature of their own nest. We performed T-maze experiments in which maze arms were connected with the subject bird’s burrow and with the burrow of a conspecific neighbour. Of 23 birds, 16 were able to recognize the arm leading to their own burrow. In a second experiment, we positioned the maze in front of the subject’s burrow but the maze arms were closed and did not enter the burrow. Consequently, no burrow odours could be sensed by the bird. In this case, 85% of birds (17 of 20) failed to choose, suggesting that petrels were not motivated to choose by positional cues in the absence of odour
cues. We explored this idea further by performing a homing experiment whereby homing birds had to relocate an artificially displaced burrow entrance. Blue petrels homed, ignoring the natural burrow entrance and using the new artificial one. The ability to smell their own burrow allows blue petrels to return to the colony at night and to find the correct nest.
Programme: 354
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Duplessy J.C., Cortijo E., Masson Delmotte V. & Paillard D. (2005). Reconstructing the variability of the climate system : facts and theories. C.R. Acad. Sci. Paris, 337(10-11), 888–896.
Abstract: On the 102- to 103-year timescale, internal reorganizations of the climate system result in abrupt climatic changes of great magnitude. Although a large body of data has been obtained, the physical mechanisms responsible for these changes are still poorly understood. Instrumental data are too short to fully record the variability of the climate system. Palaeoclimatic records provide estimates of the past atmospheric composition, temperature, precipitation, vegetation, extension of glaciers, and past ocean circulation. On the 104- to 106-year timescale, the astronomical theory of palaeoclimates accounts for most of the reconstructed variations. To cite this article: J.-C. Duplessy et al., C. R. Geoscience 337 (2005).
Programme: 960
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Villante U., M. De Lauretis, P. Francia, M. Vellante and A. Piancatelli. (2005). Solar wind-magnetosphere interaction observed in the geomagnetic field variations in the polar regions (Vol. 76).
Abstract: Proceedings of the Solar Variability and Earth Climate Conference, 27 June – 1th July, 2005, Monte Porzio Catone, Roma, Mem S.A.It.
Programme: 1130
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Jenouvrier S., Weimerskirch H., Barbraud C., Park Y.H. & Cazelle B. (2005). Evidence of a shift in the cyclicity of Antarctic seabird dynamics linked to climate. Proceedings of the Royal Society London B, 272, 887–895.
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Delmas R.J. & Petit J.R. (1994). Present Antarctic aerosol composition : A memory of ice age atmospheric dust? Geophysical research letters, 21(10), 879–882.
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Beaulieu M., Thierry A.-M., Raclot T., Le Maho Y., Ropert-Coudert Y., Gachot-Neveu H. & Ancel A. (2009). Sex-specific parental strategies according to the sex of offspring in the Adélie penguin. Behav. Ecol., 20, 878–883.
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Gasparini, J., Boulinier, T., Gill, V.A., Gil, D., Hatch, S.A. & Roulin, A. (2007). Food availability affects the maternal transfer of androgens and antibodies into eggs of a colonial seabird. J. Evol. Biol., 20, 874–880.
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Margesin R., Feller G., Gerday C. & Russell N. (2002). Cold-adapted microorganism: adaptation strategies and biotechnological potential. The encyclopedia of environmental microbiology, 2, 871–885.
Abstract: in Bitton G. (ed.), The Encyclopedia of Environmental Microbiology, vol. 2
Programme: 193
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Marchand M., Bekki S., Pazmino A., Lefèvre F., Godin-Beekmann S. & Hauchecorne A. (2005). Model Simulations of the Impact of the 2002 Antarctic Ozone Hole on the Midlatitudes. Journal of the atmospheric sciences, 62(3), 871–884.
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