Abstract
On July 12 1992, the GRIP European deep drilling (GReenland Ice Core Project) reached the bedrock in Central Greenland (Summit region; altitude of the site above sea level, a.s.l, is 3250 m, Figure 1). One year later, the US Greenland Ice Sheet Project (GISP2) successfully completed a second drilling in the same region at a site located 28 km apart (3208 m a.s.l). These two, more than 3 km long, cores have now been continuously analysed for their ice oxygen 18 content. Before reviewing the important climatic information that has already been derived from those profiles and putting them in a global perspective through a comparison with the Vostok deuterium record, we briefly summarize why and how these isotopic changes provide a record of the local temperature at the time of formation of the precipitation.
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Jouzel, J. et al. (1996). Abrupt climatic changes: A global perspective from ice cores. In: Crutzen, P.J., Ramanathan, V. (eds) Clouds, Chemistry and Climate. NATO ASI Series, vol 35. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-61051-6_5
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DOI: https://doi.org/10.1007/978-3-642-61051-6_5
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