Concurrent Changepoints in Greenland Ice Core δ<sup>18</sup>O Records and the North Atlantic Oscillation over the Past Millennium
Structural changes, or changepoints, coinciding in multiple ice core records over the Greenland Ice Sheet (GrIS) may reflect a widespread response of the GrIS to atmospheric forcing. Thus, to better understand how atmospheric circulation may regulate sudden changes in <i>δ</i><sup>...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-01-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/13/1/93 |
| _version_ | 1797495862717317120 |
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| author | István Gábor Hatvani Dániel Topál Eric Ruggieri Zoltán Kern |
| author_facet | István Gábor Hatvani Dániel Topál Eric Ruggieri Zoltán Kern |
| author_sort | István Gábor Hatvani |
| collection | DOAJ |
| description | Structural changes, or changepoints, coinciding in multiple ice core records over the Greenland Ice Sheet (GrIS) may reflect a widespread response of the GrIS to atmospheric forcing. Thus, to better understand how atmospheric circulation may regulate sudden changes in <i>δ</i><sup>18</sup>O of Greenland precipitation, we seek synchronous changepoints occurring in ice core-derived <i>δ</i><sup>18</sup>O time series across the GrIS and in the North Atlantic Oscillation (NAO) over the past millennium. By utilizing a Bayesian changepoint detection method, four changepoint horizons were revealed: at the beginning of the 20th century, in the late-15th century, and around the turn of the 11th and 10th centuries. Although the changepoints in ice core <i>δ</i><sup>18</sup>O records exhibited distinctive spatial arrangements in each horizon, all corresponded to changepoints in the NAO, indicative of a consistent atmospheric influence on GrIS surface changes over the past millennium. |
| first_indexed | 2024-03-10T01:55:39Z |
| format | Article |
| id | doaj.art-1baa502f131f41678abb339faa29ed02 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-10T01:55:39Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-1baa502f131f41678abb339faa29ed022023-11-23T12:57:02ZengMDPI AGAtmosphere2073-44332022-01-011319310.3390/atmos13010093Concurrent Changepoints in Greenland Ice Core δ<sup>18</sup>O Records and the North Atlantic Oscillation over the Past MillenniumIstván Gábor Hatvani0Dániel Topál1Eric Ruggieri2Zoltán Kern3Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Eötvös Loránd Research Network (ELKH), Budaörsi út 45., H-1112 Budapest, HungaryInstitute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Eötvös Loránd Research Network (ELKH), Budaörsi út 45., H-1112 Budapest, HungaryDepartment of Mathematics and Computer Science, College of the Holy Cross, 1 College Street, Worcester, MA 01610, USAInstitute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Eötvös Loránd Research Network (ELKH), Budaörsi út 45., H-1112 Budapest, HungaryStructural changes, or changepoints, coinciding in multiple ice core records over the Greenland Ice Sheet (GrIS) may reflect a widespread response of the GrIS to atmospheric forcing. Thus, to better understand how atmospheric circulation may regulate sudden changes in <i>δ</i><sup>18</sup>O of Greenland precipitation, we seek synchronous changepoints occurring in ice core-derived <i>δ</i><sup>18</sup>O time series across the GrIS and in the North Atlantic Oscillation (NAO) over the past millennium. By utilizing a Bayesian changepoint detection method, four changepoint horizons were revealed: at the beginning of the 20th century, in the late-15th century, and around the turn of the 11th and 10th centuries. Although the changepoints in ice core <i>δ</i><sup>18</sup>O records exhibited distinctive spatial arrangements in each horizon, all corresponded to changepoints in the NAO, indicative of a consistent atmospheric influence on GrIS surface changes over the past millennium.https://www.mdpi.com/2073-4433/13/1/93Greenland ice coresBayesian changepoint detectionice core <i>δ</i><sup>18</sup>Oatmospheric circulationbreakpoint |
| spellingShingle | István Gábor Hatvani Dániel Topál Eric Ruggieri Zoltán Kern Concurrent Changepoints in Greenland Ice Core δ<sup>18</sup>O Records and the North Atlantic Oscillation over the Past Millennium Atmosphere Greenland ice cores Bayesian changepoint detection ice core <i>δ</i><sup>18</sup>O atmospheric circulation breakpoint |
| title | Concurrent Changepoints in Greenland Ice Core δ<sup>18</sup>O Records and the North Atlantic Oscillation over the Past Millennium |
| title_full | Concurrent Changepoints in Greenland Ice Core δ<sup>18</sup>O Records and the North Atlantic Oscillation over the Past Millennium |
| title_fullStr | Concurrent Changepoints in Greenland Ice Core δ<sup>18</sup>O Records and the North Atlantic Oscillation over the Past Millennium |
| title_full_unstemmed | Concurrent Changepoints in Greenland Ice Core δ<sup>18</sup>O Records and the North Atlantic Oscillation over the Past Millennium |
| title_short | Concurrent Changepoints in Greenland Ice Core δ<sup>18</sup>O Records and the North Atlantic Oscillation over the Past Millennium |
| title_sort | concurrent changepoints in greenland ice core δ sup 18 sup o records and the north atlantic oscillation over the past millennium |
| topic | Greenland ice cores Bayesian changepoint detection ice core <i>δ</i><sup>18</sup>O atmospheric circulation breakpoint |
| url | https://www.mdpi.com/2073-4433/13/1/93 |
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