Deep sea sedimentary analogs for the Vostok ice core
Mortyn, P. G., C. D. Charles, U. S. Ninnemann, K. Ludwig, D. A. Hodell, Deep sea sedimentary analogs for the Vostok ice core, Geochem. Geophys. Geosyst., 4(8), 8405, doi:10.1029/2002GC000475, 2003. Copyright 2003 by the American Geophysical Union. Many applications of the Vostok ice core depend crit...
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ftcalifstateuniv:oai:dspace.calstate.edu:10211.3/200423 2023-05-15T13:54:58+02:00 Deep sea sedimentary analogs for the Vostok ice core Mortyn, P. Graham Charles, Charles D. Ninnemann, Ulysses S. Mortyn, P. Graham Mortyn, P. Graham. California State University, Fresno. College of Science and Mathematics. Department of Earth & Environmental Science Charles, Charles D. Scripps Institution of Oceanography Ninnemann, Ulysses S. University of Bergen. Department of Geology 2003 http://hdl.handle.net/10211.3/200423 https://doi.org/10.1029/2002GC000475 en_US eng American Geophysical Union (AGU) Geochemical Society dx.doi.org/10.1029/2002GC000475 Geochemistry, Geophysics, Geosystems (ESSN: 1525-2027). Vol. 4, 8405 doi:10.1029/2002GC000475 http://hdl.handle.net/10211.3/200423 2003 ftcalifstateuniv https://doi.org/10.1029/2002GC000475 2022-04-13T11:39:23Z Mortyn, P. G., C. D. Charles, U. S. Ninnemann, K. Ludwig, D. A. Hodell, Deep sea sedimentary analogs for the Vostok ice core, Geochem. Geophys. Geosyst., 4(8), 8405, doi:10.1029/2002GC000475, 2003. Copyright 2003 by the American Geophysical Union. Many applications of the Vostok ice core depend critically on the ability to make stratigraphic ties to marine records in the adjacent Southern Ocean. Here we present oxygen isotopic records from high accumulation rate sites in the South Atlantic sector of the Southern Ocean, collected for the purpose of complementing the recently extended deltaD record from the Vostok ice core. The combination of several planktonic foraminiferal delta(18)O records from northern subantarctic piston cores demonstrates that all of the millennial-scale oscillations expressed in the Vostok ice core over the last 60 ky are also present in marine records. The observations also support the assumption that the millennial-scale oscillations common to both marine and ice archives are synchronous, thus providing a rationale for extending the marine-ice core comparison through the last 400,000 years, making use of a marine drilled core (ODP Site 1089). By aligning the phase of these common abrupt events, we anchor the Vostok chronology to an orbitally tuned marine sediment chronology-a refinement that allows examination of a variety of paleoclimatological issues such as the relationship between deep ocean variability and Antarctic polar climate. For example, this exercise suggests that, over at least the 4 major deglaciation events, the primary (orbital scale) changes in the chemistry and, most likely, the temperature of the deep Southern ocean were synchronous with changes in atmospheric pCO(2) and polar air temperatures. We also find that the deuterium excess in the ice core resembles marine (foraminiferal) delta(13)C records and that the deuterium excess is synchronous with an "anomalous'' foraminiferal delta(18)O signal ( the residual between normalized versions of Vostok deltaD and foraminiferal delta(18)O). These observations demand a tight link between the Vostok isotopic record and the air-sea interaction of the subantarctic zone. Other/Unknown Material Antarc* Antarctic ice core Southern Ocean California State University (CSU): DSpace Antarctic Southern Ocean Geochemistry, Geophysics, Geosystems 4 8 |
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California State University (CSU): DSpace |
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ftcalifstateuniv |
language |
English |
description |
Mortyn, P. G., C. D. Charles, U. S. Ninnemann, K. Ludwig, D. A. Hodell, Deep sea sedimentary analogs for the Vostok ice core, Geochem. Geophys. Geosyst., 4(8), 8405, doi:10.1029/2002GC000475, 2003. Copyright 2003 by the American Geophysical Union. Many applications of the Vostok ice core depend critically on the ability to make stratigraphic ties to marine records in the adjacent Southern Ocean. Here we present oxygen isotopic records from high accumulation rate sites in the South Atlantic sector of the Southern Ocean, collected for the purpose of complementing the recently extended deltaD record from the Vostok ice core. The combination of several planktonic foraminiferal delta(18)O records from northern subantarctic piston cores demonstrates that all of the millennial-scale oscillations expressed in the Vostok ice core over the last 60 ky are also present in marine records. The observations also support the assumption that the millennial-scale oscillations common to both marine and ice archives are synchronous, thus providing a rationale for extending the marine-ice core comparison through the last 400,000 years, making use of a marine drilled core (ODP Site 1089). By aligning the phase of these common abrupt events, we anchor the Vostok chronology to an orbitally tuned marine sediment chronology-a refinement that allows examination of a variety of paleoclimatological issues such as the relationship between deep ocean variability and Antarctic polar climate. For example, this exercise suggests that, over at least the 4 major deglaciation events, the primary (orbital scale) changes in the chemistry and, most likely, the temperature of the deep Southern ocean were synchronous with changes in atmospheric pCO(2) and polar air temperatures. We also find that the deuterium excess in the ice core resembles marine (foraminiferal) delta(13)C records and that the deuterium excess is synchronous with an "anomalous'' foraminiferal delta(18)O signal ( the residual between normalized versions of Vostok deltaD and foraminiferal delta(18)O). These observations demand a tight link between the Vostok isotopic record and the air-sea interaction of the subantarctic zone. |
author2 |
Mortyn, P. Graham Mortyn, P. Graham. California State University, Fresno. College of Science and Mathematics. Department of Earth & Environmental Science Charles, Charles D. Scripps Institution of Oceanography Ninnemann, Ulysses S. University of Bergen. Department of Geology |
author |
Mortyn, P. Graham Charles, Charles D. Ninnemann, Ulysses S. |
spellingShingle |
Mortyn, P. Graham Charles, Charles D. Ninnemann, Ulysses S. Deep sea sedimentary analogs for the Vostok ice core |
author_facet |
Mortyn, P. Graham Charles, Charles D. Ninnemann, Ulysses S. |
author_sort |
Mortyn, P. Graham |
title |
Deep sea sedimentary analogs for the Vostok ice core |
title_short |
Deep sea sedimentary analogs for the Vostok ice core |
title_full |
Deep sea sedimentary analogs for the Vostok ice core |
title_fullStr |
Deep sea sedimentary analogs for the Vostok ice core |
title_full_unstemmed |
Deep sea sedimentary analogs for the Vostok ice core |
title_sort |
deep sea sedimentary analogs for the vostok ice core |
publisher |
American Geophysical Union (AGU) |
publishDate |
2003 |
url |
http://hdl.handle.net/10211.3/200423 https://doi.org/10.1029/2002GC000475 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic ice core Southern Ocean |
genre_facet |
Antarc* Antarctic ice core Southern Ocean |
op_relation |
dx.doi.org/10.1029/2002GC000475 Geochemistry, Geophysics, Geosystems (ESSN: 1525-2027). Vol. 4, 8405 doi:10.1029/2002GC000475 http://hdl.handle.net/10211.3/200423 |
op_doi |
https://doi.org/10.1029/2002GC000475 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
4 |
container_issue |
8 |
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1766261166271627264 |