GISP2 oxygen isotope ratios

  • Stuiver M
  • Grootes P
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Abstract

The GISP2 oxygen isotope record, with its high-resolution detail, yields crucial information on past climate change. The glacial [delta]18O oscillations of the GISP2 core, with their very fast onsets, are templates of a prototype oscillation of variable duration with an amplitude of 3.9[permil]. The halfway mark of the cold-warm transition is reached in 2 years; the top is reached in 50 years. The [delta]18O-time gradient of the leading front is about 7.8[permil] per 100 yr. After reaching the top, [delta]18O slowly declines by -0.14[permil] per 100 yr. The duration of [delta]18O decline varies from a couple of centuries for fast oscillations to about 4000 yr for slower ones. The subsequent [delta]18O downturn during the warm-cold transition has a [delta]18O-time gradient of -3.2[permil] per 100 yr and lasts about 80 yr

Author-supplied keywords

  • CORE
  • Climate
  • Climate-Change
  • DURATION
  • GISP2
  • Gradient
  • High-Resolution
  • ISOTOPE
  • LAST
  • OXYGEN ISOTOPE RATIOS
  • Oxygen
  • PAST
  • RATIOS
  • RECORD
  • Ratio
  • TRANSITION
  • climate change
  • isotope ratios

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Authors

  • Minze Stuiver

  • P M Grootes

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