Super ENSO and Global Climate Oscillations at Millennial Time Scales
The late Pleistocene history of seawater temperature and salinity variability in the western tropical Pacific warm pool is reconstructed from oxygen isotope (δ 18 O) and magnesium/calcium composition of planktonic foraminifera. Differentiating the calcite δ 18 O record into components of temperature...
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American Association for the Advancement of Science (AAAS)
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craaas:10.1126/science.1071627 2024-06-23T07:53:21+00:00 Super ENSO and Global Climate Oscillations at Millennial Time Scales Stott, Lowell Poulsen, Christopher Lund, Steve Thunell, Robert 2002 http://dx.doi.org/10.1126/science.1071627 https://www.science.org/doi/pdf/10.1126/science.1071627 en eng American Association for the Advancement of Science (AAAS) Science volume 297, issue 5579, page 222-226 ISSN 0036-8075 1095-9203 journal-article 2002 craaas https://doi.org/10.1126/science.1071627 2024-06-06T04:01:31Z The late Pleistocene history of seawater temperature and salinity variability in the western tropical Pacific warm pool is reconstructed from oxygen isotope (δ 18 O) and magnesium/calcium composition of planktonic foraminifera. Differentiating the calcite δ 18 O record into components of temperature and local water δ 18 O reveals a dominant salinity signal that varied in accord with Dansgaard/Oeschger cycles over Greenland. Salinities were higher at times of high-latitude cooling and were lower during interstadials. The pattern and magnitude of the salinity variations imply shifts in the tropical Pacific ocean/atmosphere system analogous to modern El Niño–Southern Oscillation (ENSO). El Niño conditions correlate with stadials at high latitudes, whereas La Niña conditions correlate with interstadials. Millennial-scale shifts in atmospheric convection away from the western tropical Pacific may explain many paleo-observations, including lower atmospheric CO 2 , N 2 O, and CH 4 during stadials and patterns of extratropical ocean variability that have tropical source functions that are negatively correlated with El Niño. Article in Journal/Newspaper Greenland Planktonic foraminifera AAAS Resource Center (American Association for the Advancement of Science) Greenland Pacific Science 297 5579 222 226 |
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Open Polar |
collection |
AAAS Resource Center (American Association for the Advancement of Science) |
op_collection_id |
craaas |
language |
English |
description |
The late Pleistocene history of seawater temperature and salinity variability in the western tropical Pacific warm pool is reconstructed from oxygen isotope (δ 18 O) and magnesium/calcium composition of planktonic foraminifera. Differentiating the calcite δ 18 O record into components of temperature and local water δ 18 O reveals a dominant salinity signal that varied in accord with Dansgaard/Oeschger cycles over Greenland. Salinities were higher at times of high-latitude cooling and were lower during interstadials. The pattern and magnitude of the salinity variations imply shifts in the tropical Pacific ocean/atmosphere system analogous to modern El Niño–Southern Oscillation (ENSO). El Niño conditions correlate with stadials at high latitudes, whereas La Niña conditions correlate with interstadials. Millennial-scale shifts in atmospheric convection away from the western tropical Pacific may explain many paleo-observations, including lower atmospheric CO 2 , N 2 O, and CH 4 during stadials and patterns of extratropical ocean variability that have tropical source functions that are negatively correlated with El Niño. |
format |
Article in Journal/Newspaper |
author |
Stott, Lowell Poulsen, Christopher Lund, Steve Thunell, Robert |
spellingShingle |
Stott, Lowell Poulsen, Christopher Lund, Steve Thunell, Robert Super ENSO and Global Climate Oscillations at Millennial Time Scales |
author_facet |
Stott, Lowell Poulsen, Christopher Lund, Steve Thunell, Robert |
author_sort |
Stott, Lowell |
title |
Super ENSO and Global Climate Oscillations at Millennial Time Scales |
title_short |
Super ENSO and Global Climate Oscillations at Millennial Time Scales |
title_full |
Super ENSO and Global Climate Oscillations at Millennial Time Scales |
title_fullStr |
Super ENSO and Global Climate Oscillations at Millennial Time Scales |
title_full_unstemmed |
Super ENSO and Global Climate Oscillations at Millennial Time Scales |
title_sort |
super enso and global climate oscillations at millennial time scales |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2002 |
url |
http://dx.doi.org/10.1126/science.1071627 https://www.science.org/doi/pdf/10.1126/science.1071627 |
geographic |
Greenland Pacific |
geographic_facet |
Greenland Pacific |
genre |
Greenland Planktonic foraminifera |
genre_facet |
Greenland Planktonic foraminifera |
op_source |
Science volume 297, issue 5579, page 222-226 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.1071627 |
container_title |
Science |
container_volume |
297 |
container_issue |
5579 |
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222 |
op_container_end_page |
226 |
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1802644939323998208 |