Flow of anisotropic ice from the EPICA core: a new test apparatus
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چکیده
منابع مشابه
A tentative chronology for the EPICA Dome Concordia ice core
A tentative age scale (EDC1) for the last 45 kyr is established for the new 788-m EPICA Dome C ice core using a simple ice flow model. The age of volcanic eruptions, the end of the Younger Dryas event, and the estimated depth and age of elevated Be, about 41 kyr ago were used to calibrate the model parameters. The uncertainty of EDC1 is estimated to ± 10 yr for 0 to 700 yr BP, up to ± 200 yr ba...
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The southern hemisphere at glacial terminations: insights from the Dome C ice core R. Röthlisberger, M. Mudelsee, M. Bigler, M. de Angelis, H. Fischer, M. Hansson, F. Lambert, V. Masson-Delmotte, L. Sime, R. Udisti, and E. W. Wolff British Antarctic Survey, Natural Environment Research Council, Cambridge, UK Climate Risk Analysis, Hannover, Germany Niels Bohr Institute, University of Copenhagen...
متن کاملThe EDC3 chronology for the EPICA Dome C ice core
The EPICA (European Project for Ice Coring in Antarctica) Dome C drilling in East Antarctica has now been completed to a depth of 3260 m, at only a few meters above bedrock. Here we present the new EDC3 chronology, which is based on the use of 1) a snow accumulation and mechanical flow model, and 2) a set of independent age markers along the core. These are obtained by pattern matching of recor...
متن کاملChange in ice rheology during climate variations – implications for ice flow modelling and dating of the EPICA Dome C core
The study of the distribution of crystallographic orientations (i.e., the fabric) along ice cores provides information on past and current ice flow in ice-sheets. Besides the usually observed formation of a vertical single maximum fabric, the EPICA Dome C ice core (EDC) shows an abrupt and unexpected strengthening of its fabric during termination II around 1750 m depth. Such strengthening has a...
متن کاملRetrieving the paleoclimatic signal from the deeper part of the EPICA Dome C ice core
An important share of paleoclimatic information is buried within the lowermost layers of deep ice cores. Because improving our records further back in time is one of the main challenges in the near future, it is essential to judge how deep these records remain unaltered, since the proximity of the bedrock is likely to interfere both with the recorded temporal sequence and the ice properties. In...
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ژورنال
عنوان ژورنال: Annals of Glaciology
سال: 2000
ISSN: 0260-3055,1727-5644
DOI: 10.3189/172756400781820732