The lower picture, plotted against depth, shows how compressed the deeper parts of the cores are: the earliest 100 kyr (thousand years) of the EPICA core are in the bottom 100 m of the core.īefore 400 kyr the character of the ice ages are seen to be somewhat different: interglacial warmth is distinctly less warm than the four most recent interglacials however, the interglacial periods before 400 kyr occupied a much larger proportion of each cycle than subsequently. The upper plot, with x-axis being age (years before 1950) clearly shows the extra information in the EPICA core before the start of the Vostok record. The picture shows delta deuterium data (a proxy for temperature: more negative values indicate lower temperatures) from both EPICA and Vostok. Information about the core was first published in Nature on 10 June 2004. Present-day annual average air temperature is −54.5 ☌ and snow accumulation 25 mm/y. Drilling was completed at this site in December 2004, reaching a drilling depth of 3270.2 m, 5 m above bedrock. The core goes back 740,000 years and reveals 8 previous glacial cycles. This site ( 75☀6′S 123☂1′E / 75.100°S 123.350☎ / -75.100 123.350, 3233 m above sea level, 560 km from Vostok Station) was chosen to obtain the longest undisturbed chronicle of environmental change, in order to characterise climate variability over several glacial cycles, and to study potential climate forcings and their relationship to events in other regions. In 2008 the project received the Descartes Prize for Research. The European Science Foundation EPICA Programme (1996–2005) provides co-ordination for EPICA drilling activities at Dome Concordia and Kohnen Station, which are supported by the European Commission and by national contributions from Belgium, Denmark, France, Germany, Italy, the Netherlands, Norway, Sweden, Switzerland and the United Kingdom.ĭeep drilling took place at two sites in Antarctica: Concordia Station at Dome C and Kohnen Station. Evaluation of these records will provide information about the natural climate variability and mechanisms of rapid climatic changes during the last glacial epoch.
Permanent protal to above bedrock imango full#
Its main objective is to obtain full documentation of the climatic and atmospheric record archived in Antarctic ice by drilling and analyzing two ice cores and comparing these with their Greenland counterparts ( GRIP and GISP). The European Project for Ice Coring in Antarctica (EPICA) is a multinational European project for deep ice core drilling in Antarctica. End of the EDML ice core from a depth 2775 m consists of meltwater which has formed at the basis of the ice sheet the core was drilled 2002-2004 through the Antarctic ice sheet in the area of Dronning Maud Land by the project EPICA
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