Climate entropy production recorded in a deep Antarctic ice core
Paleoclimate records are extremely rich sources of information about the past history of the Earth system. Information theory, the branch of mathematics capable of quantifying the degree to which the present is informed by the past, provides a new means for studying these records. Here, we demonstra...
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ftdatacite:10.48550/arxiv.1806.10936 2023-05-15T13:40:32+02:00 Climate entropy production recorded in a deep Antarctic ice core Garland, Joshua Jones, Tyler R. Bradley, Elizabeth Neuder, Michael White, James W. C. 2018 https://dx.doi.org/10.48550/arxiv.1806.10936 https://arxiv.org/abs/1806.10936 unknown arXiv arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Geophysics physics.geo-ph Data Analysis, Statistics and Probability physics.data-an FOS Physical sciences Preprint Article article CreativeWork 2018 ftdatacite https://doi.org/10.48550/arxiv.1806.10936 2022-04-01T09:35:19Z Paleoclimate records are extremely rich sources of information about the past history of the Earth system. Information theory, the branch of mathematics capable of quantifying the degree to which the present is informed by the past, provides a new means for studying these records. Here, we demonstrate that estimates of the Shannon entropy rate of the water-isotope data from the West Antarctica Ice Sheet (WAIS) Divide ice core, calculated using weighted permutation entropy (WPE), can bring out valuable new information from this record. We find that WPE correlates with accumulation, reveals possible signatures of geothermal heating at the base of the core, and clearly brings out laboratory and data-processing effects that are difficult to see in the raw data. For example, the signatures of Dansgaard-Oeschger events in the information record are small, suggesting that these abrupt warming events may not represent significant changes in the climate system dynamics. While the potential power of information theory in paleoclimatology problems is significant, the associated methods require careful handling and well-dated, high-resolution data. The WAIS Divide ice core is the first such record that can support this kind of analysis. As more high-resolution records become available, information theory will likely become a common forensic tool in climate science. : 15 pages, 7 figures, 1 table Report Antarc* Antarctic Antarctica Dansgaard-Oeschger events ice core Ice Sheet West Antarctica DataCite Metadata Store (German National Library of Science and Technology) Antarctic West Antarctica |
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Geophysics physics.geo-ph Data Analysis, Statistics and Probability physics.data-an FOS Physical sciences |
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Geophysics physics.geo-ph Data Analysis, Statistics and Probability physics.data-an FOS Physical sciences Garland, Joshua Jones, Tyler R. Bradley, Elizabeth Neuder, Michael White, James W. C. Climate entropy production recorded in a deep Antarctic ice core |
topic_facet |
Geophysics physics.geo-ph Data Analysis, Statistics and Probability physics.data-an FOS Physical sciences |
description |
Paleoclimate records are extremely rich sources of information about the past history of the Earth system. Information theory, the branch of mathematics capable of quantifying the degree to which the present is informed by the past, provides a new means for studying these records. Here, we demonstrate that estimates of the Shannon entropy rate of the water-isotope data from the West Antarctica Ice Sheet (WAIS) Divide ice core, calculated using weighted permutation entropy (WPE), can bring out valuable new information from this record. We find that WPE correlates with accumulation, reveals possible signatures of geothermal heating at the base of the core, and clearly brings out laboratory and data-processing effects that are difficult to see in the raw data. For example, the signatures of Dansgaard-Oeschger events in the information record are small, suggesting that these abrupt warming events may not represent significant changes in the climate system dynamics. While the potential power of information theory in paleoclimatology problems is significant, the associated methods require careful handling and well-dated, high-resolution data. The WAIS Divide ice core is the first such record that can support this kind of analysis. As more high-resolution records become available, information theory will likely become a common forensic tool in climate science. : 15 pages, 7 figures, 1 table |
format |
Report |
author |
Garland, Joshua Jones, Tyler R. Bradley, Elizabeth Neuder, Michael White, James W. C. |
author_facet |
Garland, Joshua Jones, Tyler R. Bradley, Elizabeth Neuder, Michael White, James W. C. |
author_sort |
Garland, Joshua |
title |
Climate entropy production recorded in a deep Antarctic ice core |
title_short |
Climate entropy production recorded in a deep Antarctic ice core |
title_full |
Climate entropy production recorded in a deep Antarctic ice core |
title_fullStr |
Climate entropy production recorded in a deep Antarctic ice core |
title_full_unstemmed |
Climate entropy production recorded in a deep Antarctic ice core |
title_sort |
climate entropy production recorded in a deep antarctic ice core |
publisher |
arXiv |
publishDate |
2018 |
url |
https://dx.doi.org/10.48550/arxiv.1806.10936 https://arxiv.org/abs/1806.10936 |
geographic |
Antarctic West Antarctica |
geographic_facet |
Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctica Dansgaard-Oeschger events ice core Ice Sheet West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Dansgaard-Oeschger events ice core Ice Sheet West Antarctica |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1806.10936 |
_version_ |
1766136612110991360 |