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Jouzel J., Vimeux F., Caillon N., Delaygue G., Hoffmann G., Masson Delmotte V. & Parre. (2003). Magnitude of the isotope-temperature scaling for interpretation of central Antarctic ice cores. J. Geophys. Res., 108, 1029–1046.
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Masson-Delmotte V., Stenni B. & Jouzel J. (2004). Common millenial scale variability of Antarctica and southern ocean temperatures during the past 5000 years reconstructed from EPICA Dome C ice core,. Holocene, 2, 145–151.
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Goose H., Masson-Delmotte V., Renssen H., Delmotte M., Fichefet T., Morgan V., van Ommen T., Khim B.K. & Stenni B. (2004). A delayged medieval warm period in the Southern Ocean? Geophysical research letters, 31(6), 113–117.
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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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Landais A., Barnola J.M., Awamura K., Caillon N., Delmotte M., Van Ommen T., Dreyfus G., Jouzel J., Masson-Delmotte V., Minster B., Freitag J., Leuenberger M., Schwander J., Huber C., Etheridge D. & Morgan V. (2006). Firn-air d15N in modern polar sites and glacial-interglacial ice: a model-data mismatch during glacial periods in Antarctica? Quat Sci Rev, 25(1-2), 49–62.
Abstract: The phase lag between atmospheric composition (air bubbles) and temperature (water isotopes) can be quantified from ice cores provided that the age difference between entrapped air and the surrounding air can be correctly estimated. This difference depends on the lock-in depth (LID), when air no longer mixes with the atmosphere. The LID can be estimated from firnification models or from the air isotopic composition (?15N and ?40Ar). Both methods give consistent results for Greenland and one coastal site in Antarctica (Byrd). New firn measurements in Greenland (NorthGRIP) and Antarctica (Berkner Island, BAS depot, Dome C) confirm that firnification models correctly reproduce the present LID over a large range of surface conditions. However, a systematic mismatch is observed for the Last Glacial Maximum (LGM) in East Antarctic sites (Vostok, Dome C, Dome F) questioning the model's validity. Here we use new ?15N measurements from two coastal Antarctic sites (Kohnen Station and Law Dome) providing depth estimates again distinct from firnification model calculations. We show that this discrepancy can be resolved by revising the estimate of past accumulation rates. ?15N measurements can therefore help to constrain past accumulation rate and improve ice core dating.
Programme: 960
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EPICA Community Members. (2004). Eight glacial cycles from an Antarctic ice core. Nature, 429(6992), 623–628.
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. (2003). Evolution of chemical peak shapes in the Dome C, Antarctica, ice core. J. Geophys. Res., 108.
Keywords: 1863 Hydrology: Snow and ice; 9310 Information Related to Geographic Region: Antarctica; 3344 Meteorology and Atmospheric Dynamics: Paleoclimatology; 3999 Mineral Physics: General or miscellaneous; 0325 Atmospheric Composition and Structure: Evolution of the atmosphere
Programme: 960
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Delmonte B., Petit J.R., Krinner G., Maggi V., Jouzel J. & Udisti R. (2005). Ice core evidence for secular variability and 200-year dipolar oscillations in atmospheric circulation over East Antarctica during the Holocene. Climate dynamics, 24, 641–654.
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Krinner G. & Werner M. (2003). Impact of precipitation seasonality changes on isotopic signals in polar ice cores : A multi-model analysis. Earth Planet. Sci. Lett., 216, 525–538.
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Siegenthaler U., Stocker T., Monnin E., Luthi D., Schwander J., Stauffer B., Raynaud D., Barnola J.M., Fischer H., Masson-Delmotte V. & Jouzel J. (2005). Stable Carbon Cycle-Climate Relationship During the Late Pleistocene. Science, 310, 1313–1316.
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