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Duprat J., Engrand C., Gounelle M., Maurette M., Matrajt G., Kurat G. & Brandstätter F. (2001). Search for possible extraterrestrial matter among shiny small iron oxide spherules. Lunar and planetary science, XXXII, #1773.
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Friesen, V.L., T. M. Burg & K.D. McCoy. (2007). Mechanisms of population differentiation in seabirds. Mol. Ecol., 16, 1765–1785.
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Stephens B.B., K. Gurney, P. Tans, C. Sweeney, P. Wouter, L. Bruhwiler, P.Ciais, M.Ramonet, P. Bousquet, T. Nakazawa, S. Aoki, T. Machida, G. Inoue, N. Vinnichenko, J. Lloyd, A. Jordan, O. Shibistova, R. Langenfelds, P. Steele, R. Francey, and S. Denning. (2007). The vertical distribution of atmospheric CO2 defines the latitudinal partitioning of global carbon fluxes. Science, 316, 1732–1735.
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Stephens, B.B.; Gurney, K.R.; Tans, P.P.; Sweeney, C.; Peters, W.; Bruhwiler, L.; Ciais, P.; Ramonet, M.; Bousquet, P.; Nakazawa, T.; Aoki, S.; Machida, T.; Inoue, G.; Vinnichenko, N.; Lloyd, J.; Jordan, A.; Heimann, M.; Shibistova, O.; Langenfelds, R.L.; Steele, L.P.; Francey, R.J.; Denning, A.S. (2007). Weak Northern and Strong Tropical Land Carbon Uptake from Vertical Profiles of Atmospheric CO2. Science, 316(5832), 1732–1735.
Abstract: Measurements of midday vertical atmospheric CO2 distributions reveal annual-mean vertical CO2 gradients that are inconsistent with atmospheric models that estimate a large transfer of terrestrial carbon from tropical to northern latitudes. The three models that most closely reproduce the observed annual-mean vertical CO2 gradients estimate weaker northern uptake of -1.5 petagrams of carbon per year (Pg C year-1) and weaker tropical emission of +0.1 Pg C year-1 compared with previous consensus estimates of -2.4 and +1.8 Pg C year-1, respectively. This suggests that northern terrestrial uptake of industrial CO2 emissions plays a smaller role than previously thought and that, after subtracting land-use emissions, tropical ecosystems may currently be strong sinks for CO2.
Programme: 416
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Caillon N., Severinghaus J.P., Jouzel J., Barnola J.M., Kang J. & Lipenkov V.Y. (2003). Timing of Atmospheric CO2 and Antarctic Temperature Changes across Termination III. Science, 299, 1728–1731.
Abstract: The analysis of air bubbles from ice cores has yielded a precise record of atmospheric greenhouse gas concentrations, but the timing of changes in these gases with respect to temperature is not accurately known because of uncertainty in the gas age-ice age difference. We have measured the isotopic composition of argon in air bubbles in the Vostok core during Termination III (~240,000 years before the present). This record most likely reflects the temperature and accumulation change, although the mechanism remains unclear. The sequence of events during Termination III suggests that the CO2 increase lagged Antarctic deglacial warming by 800 ± 200 years and preceded the Northern Hemisphere deglaciation.
Programme: 902
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Duprat J., Engrand C., Maurette M., Gounelle M., Hammer C. & Kurat G. (2003). The CONCORDIA-collection : pristine contemporary micrometeorites from central Antarctica surface snow. Lunar and planetary science, 34, 1727.
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Engrand C., Gounelle M., Zolensky M.E. & Duprat J. (2003). About Tagish Lake as a potential parent body for polar micrometeorites ; clues from their hydrogen isotopic compositions. Lunar and planetary science, 34, 1688.
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Long D.G. & Drinkwater M.R. (1999). Cryosphere applications of NSCAT data : Special issue on ADEOS. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 37(3), 1671–1684.
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Raccurt, M.; Baudimont, F.; Tirard, J.; Rey, B.; Moureaux, E.; Geloen, A.; Duchamp, C. (2008). Growing in Antarctica, a challenge for white adipose tissue development in Adelie penguin chicks (Pygoscelis adeliae). Am. J. Physiol. Regul. Integr. Comp. Physiol., 295(5), R1671–1679.
Abstract: Rapid growth is of crucial importance for Adelie penguin chicks reared during the short Antarctic summer. It partly depends on the rapid ontogenesis of fat stores that are virtually null at hatching but then develop considerably (x40) within a month to constitute both an isolative layer against cold and an energy store to fuel thermogenic and growth processes. The present study was aimed at identifying by RT-PCR the major transcriptional events that chronologically underlie the morphological transformation of adipocyte precursors into mature adipocytes from hatching to 30 days of age. The peak expression of GATA binding protein 3, a marker of preadipocytes, at day 7 posthatch indicates a key proliferation step, possibly in relation to the expression of C/EBP{alpha} (C/EBP{alpha}). High plasma total 3,5,3'-triiodo-L-thyronine (T3) levels and high levels of growth hormone receptor transcripts at hatching suggested that growth hormone and T3 play early activating roles to favor proliferation of preadipocyte precursors. Differentiation and growth of preadipocytes may occur around day 15 in connection with increased abundance of transcripts encoding IGF-1, proliferator-activated receptor-{gamma}, and C/EBP{beta}, gradually leading to functional maturation of metabolic features of adipocytes including lipid uptake and storage (lipoprotein lipase, fatty-acid synthase) and late endocrine functions (adiponectin) by day 30. Present results show a close correlation between adipose tissue development and chick biology and a difference in the scheduled expression of regulatory factors controlling adipogenesis compared with in vitro studies using cell lines emphasizing the importance of in vivo approaches.
Programme: 131
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Milot E., Weimerskirch H. & Bernatchez L. (2008). The seabird paradox : dispersal, genetic structure and population dynamics in a highly mobile, but philopatric albatross species. Mol. Ecol., 17, 1658–1673.
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