Modeling geologically abrupt climate changes in the Miocene
The gradual cooling of the Cenozoic, including the Miocene epoch, was punctuated by many geologically abrupt warming and cooling episodes – strong deviations from the cooling trend with time span of ten to hundred thousands of years. Our working hypothesis is that some of those warming episodes at l...
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ftcopernicus:oai:publications.copernicus.org:cpd9457 2023-05-15T13:36:36+02:00 Modeling geologically abrupt climate changes in the Miocene Haupt, B. J. Seidov, D. 2018-09-26 application/pdf https://doi.org/10.5194/cpd-6-2687-2010 https://cp.copernicus.org/preprints/cp-2010-96/ eng eng doi:10.5194/cpd-6-2687-2010 https://cp.copernicus.org/preprints/cp-2010-96/ eISSN: 1814-9332 Text 2018 ftcopernicus https://doi.org/10.5194/cpd-6-2687-2010 2020-07-20T16:26:15Z The gradual cooling of the Cenozoic, including the Miocene epoch, was punctuated by many geologically abrupt warming and cooling episodes – strong deviations from the cooling trend with time span of ten to hundred thousands of years. Our working hypothesis is that some of those warming episodes at least partially might have been caused by dynamics of the emerging Antarctic Ice Sheet, which, in turn, might have caused strong changes of sea surface salinity in the Miocene Southern Ocean. Feasibility of this hypothesis is explored in a series of coupled ocean-atmosphere computer experiments. The results suggest that relatively small and geologically short-lived changes in freshwater balance in the Southern Ocean could have significantly contributed to at least two prominent warming episodes in the Miocene. Importantly, the experiments also suggest that the Southern Ocean was more sensitive to the salinity changes in the Miocene than today, which can attributed to the opening of the Central American Isthmus as a major difference between the Miocene and the present-day ocean-sea geometry. Text Antarc* Antarctic Ice Sheet Southern Ocean Copernicus Publications: E-Journals Antarctic Southern Ocean |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
The gradual cooling of the Cenozoic, including the Miocene epoch, was punctuated by many geologically abrupt warming and cooling episodes – strong deviations from the cooling trend with time span of ten to hundred thousands of years. Our working hypothesis is that some of those warming episodes at least partially might have been caused by dynamics of the emerging Antarctic Ice Sheet, which, in turn, might have caused strong changes of sea surface salinity in the Miocene Southern Ocean. Feasibility of this hypothesis is explored in a series of coupled ocean-atmosphere computer experiments. The results suggest that relatively small and geologically short-lived changes in freshwater balance in the Southern Ocean could have significantly contributed to at least two prominent warming episodes in the Miocene. Importantly, the experiments also suggest that the Southern Ocean was more sensitive to the salinity changes in the Miocene than today, which can attributed to the opening of the Central American Isthmus as a major difference between the Miocene and the present-day ocean-sea geometry. |
format |
Text |
author |
Haupt, B. J. Seidov, D. |
spellingShingle |
Haupt, B. J. Seidov, D. Modeling geologically abrupt climate changes in the Miocene |
author_facet |
Haupt, B. J. Seidov, D. |
author_sort |
Haupt, B. J. |
title |
Modeling geologically abrupt climate changes in the Miocene |
title_short |
Modeling geologically abrupt climate changes in the Miocene |
title_full |
Modeling geologically abrupt climate changes in the Miocene |
title_fullStr |
Modeling geologically abrupt climate changes in the Miocene |
title_full_unstemmed |
Modeling geologically abrupt climate changes in the Miocene |
title_sort |
modeling geologically abrupt climate changes in the miocene |
publishDate |
2018 |
url |
https://doi.org/10.5194/cpd-6-2687-2010 https://cp.copernicus.org/preprints/cp-2010-96/ |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Ice Sheet Southern Ocean |
genre_facet |
Antarc* Antarctic Ice Sheet Southern Ocean |
op_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cpd-6-2687-2010 https://cp.copernicus.org/preprints/cp-2010-96/ |
op_doi |
https://doi.org/10.5194/cpd-6-2687-2010 |
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1766081357219364864 |