Age determination of Vostock Ice Core ...
The object of the present study is to introduce a means of comparing the Vostok and marine chronologies. Our strategy has been to use the delta18O of atmospheric O2 (denoted delta18Oatm) from the Vostok ice core as a proxy for the delta18O of seawater (denoted delta18Osw). Our underlying premise in...
| Main Authors: | , , , , , , , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
PANGAEA
1993
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.729774 https://doi.pangaea.de/10.1594/PANGAEA.729774 |
| Summary: | The object of the present study is to introduce a means of comparing the Vostok and marine chronologies. Our strategy has been to use the delta18O of atmospheric O2 (denoted delta18Oatm) from the Vostok ice core as a proxy for the delta18O of seawater (denoted delta18Osw). Our underlying premise in using delta18Oatm as a proxy for delta18Osw is that past variations in delta18Osw (an indicator of continental ice volume) have been transmitted to the atmospheric O2 reservoir by photosynthesizing organisms in the surface waters of the world's oceans. We compare our record of delta18Oatm to the delta18Osw record which has been developed from studies of the isotopic composition of biogenic calcite (delta18Oforam) in deep-sea cores. We have tied our delta18Oatm record from Vostok to the SPECMAP timescale throughout the last 135 kyr by correlating delta18Oatm with a delta18Osw record from V19-30. Results of the correlation indicate that 77% of the variance is shared between these two records. We observed differences ... : Supplement to: Sowers, Todd A; Bender, Michael L; Labeyrie, Laurent D; Martinson, Douglas G; Jouzel, Jean; Raynaud, Dominique; Pichon, Jean-Jacques; Korotkevich, Yevgeniy S (1993): A 135,000-year Vostok-SPECMAP common temporal framework. Paleoceanography, 8(6), 737-766 ... |
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