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Past Accumulation rates derived from observed annual layers in the GRIP ice core from Summit, Central Greenland

  • D. Dahl-Jensen
  • S. J. Johnsen
  • C. U. Hammer
  • H. B. Clausen
  • J. Jouzel
Part of the NATO ASI Series book series (volume 12)

Abstract

Based on dated reference horizons down to 1623 m an ice flow model has been developed. The model is used to reconstruct past accumulation rates from the sequences of detected annual layers in the upper 2321 m of the 3029 m deep GRIP ice core. Comparison of these past time accumulation rates with the corresponding δ 18O values show a strong correlation. This relationship can be used in a non steady state flow model, in which past accumulation rates, deduced from the continuous δ 18O record, are used to model a time scale. The hereby determined time scale and the modelled annual layers compare well with the observed data.

Keywords

Accumulation Rate Annual Layer Reference Horizon Annual Accumulation Rate Steady State Flow Model 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1993

Authors and Affiliations

  • D. Dahl-Jensen
    • 1
  • S. J. Johnsen
    • 1
    • 2
  • C. U. Hammer
    • 1
  • H. B. Clausen
    • 1
  • J. Jouzel
    • 3
    • 4
  1. 1.Geophysical InstituteUniversity of CopenhagenCopenhagenDenmark
  2. 2.Science InstituteUniversity of ReykjavikReykjavik 107Iceland
  3. 3.Laboratoire de Modélisation du Climat et de l’Environment CEA/DSMCE SaclayFrance
  4. 4.Laboratoire de Glaciologie et Géophysique de l’EnvironmentSt Martin d’Hères CedexFrance

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