Mid-Pliocene sea level and continental ice volume based on coupled benthic Mg/Ca palaeotemperatures and oxygen isotopes
Ostracode magnesium/calcium (Mg/Ca)-based bottom-water temperatures were combined with benthic foraminiferal oxygen isotopes in order to quantify the oxygen isotopic composition of seawater, and estimate continental ice volume and sea-level variability during the Mid-Pliocene warm period, ca 3.3–3.0...
Published in: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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Language: | English |
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Online Access: | http://dx.doi.org/10.1098/rsta.2008.0222 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.2008.0222 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsta.2008.0222 |
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crroyalsociety:10.1098/rsta.2008.0222 2024-09-15T17:46:01+00:00 Mid-Pliocene sea level and continental ice volume based on coupled benthic Mg/Ca palaeotemperatures and oxygen isotopes Dwyer, Gary S Chandler, Mark A 2008 http://dx.doi.org/10.1098/rsta.2008.0222 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.2008.0222 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsta.2008.0222 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences volume 367, issue 1886, page 157-168 ISSN 1364-503X 1471-2962 journal-article 2008 crroyalsociety https://doi.org/10.1098/rsta.2008.0222 2024-08-19T04:24:54Z Ostracode magnesium/calcium (Mg/Ca)-based bottom-water temperatures were combined with benthic foraminiferal oxygen isotopes in order to quantify the oxygen isotopic composition of seawater, and estimate continental ice volume and sea-level variability during the Mid-Pliocene warm period, ca 3.3–3.0 Ma. Results indicate that, following a low stand of approximately 65 m below present at marine isotope stage (MIS) M2 ( ca 3.3 Ma), sea level generally fluctuated by 20–30 m above and below a mean value similar to present-day sea level. In addition to the low-stand event at MIS M2, significant low stands occurred at MIS KM2 (−40 m), G22 (−40 m) and G16 (−60 m). Six high stands of +10 m or more above present day were also observed; four events (+10, +25,+15 and +30 m) from MIS M1 to KM3, a high stand of +15 m at MIS K1, and a high stand of +25 m at MIS G17. These results indicate that continental ice volume varied significantly during the Mid-Pliocene warm period and that at times there were considerable reductions of Antarctic ice. Article in Journal/Newspaper Antarc* Antarctic The Royal Society Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 367 1886 157 168 |
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Open Polar |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
Ostracode magnesium/calcium (Mg/Ca)-based bottom-water temperatures were combined with benthic foraminiferal oxygen isotopes in order to quantify the oxygen isotopic composition of seawater, and estimate continental ice volume and sea-level variability during the Mid-Pliocene warm period, ca 3.3–3.0 Ma. Results indicate that, following a low stand of approximately 65 m below present at marine isotope stage (MIS) M2 ( ca 3.3 Ma), sea level generally fluctuated by 20–30 m above and below a mean value similar to present-day sea level. In addition to the low-stand event at MIS M2, significant low stands occurred at MIS KM2 (−40 m), G22 (−40 m) and G16 (−60 m). Six high stands of +10 m or more above present day were also observed; four events (+10, +25,+15 and +30 m) from MIS M1 to KM3, a high stand of +15 m at MIS K1, and a high stand of +25 m at MIS G17. These results indicate that continental ice volume varied significantly during the Mid-Pliocene warm period and that at times there were considerable reductions of Antarctic ice. |
format |
Article in Journal/Newspaper |
author |
Dwyer, Gary S Chandler, Mark A |
spellingShingle |
Dwyer, Gary S Chandler, Mark A Mid-Pliocene sea level and continental ice volume based on coupled benthic Mg/Ca palaeotemperatures and oxygen isotopes |
author_facet |
Dwyer, Gary S Chandler, Mark A |
author_sort |
Dwyer, Gary S |
title |
Mid-Pliocene sea level and continental ice volume based on coupled benthic Mg/Ca palaeotemperatures and oxygen isotopes |
title_short |
Mid-Pliocene sea level and continental ice volume based on coupled benthic Mg/Ca palaeotemperatures and oxygen isotopes |
title_full |
Mid-Pliocene sea level and continental ice volume based on coupled benthic Mg/Ca palaeotemperatures and oxygen isotopes |
title_fullStr |
Mid-Pliocene sea level and continental ice volume based on coupled benthic Mg/Ca palaeotemperatures and oxygen isotopes |
title_full_unstemmed |
Mid-Pliocene sea level and continental ice volume based on coupled benthic Mg/Ca palaeotemperatures and oxygen isotopes |
title_sort |
mid-pliocene sea level and continental ice volume based on coupled benthic mg/ca palaeotemperatures and oxygen isotopes |
publisher |
The Royal Society |
publishDate |
2008 |
url |
http://dx.doi.org/10.1098/rsta.2008.0222 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.2008.0222 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsta.2008.0222 |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences volume 367, issue 1886, page 157-168 ISSN 1364-503X 1471-2962 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rsta.2008.0222 |
container_title |
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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367 |
container_issue |
1886 |
container_start_page |
157 |
op_container_end_page |
168 |
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1810493967657074688 |