Concurrent Changepoints in Greenland Ice Core δ18O 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 δ18O of Greenland precipitation...
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ftmdpi:oai:mdpi.com:/2073-4433/13/1/93/ 2023-08-20T04:06:48+02:00 Concurrent Changepoints in Greenland Ice Core δ18O Records and the North Atlantic Oscillation over the Past Millennium István Gábor Hatvani Dániel Topál Eric Ruggieri Zoltán Kern agris 2022-01-07 application/pdf https://doi.org/10.3390/atmos13010093 EN eng Multidisciplinary Digital Publishing Institute Climatology https://dx.doi.org/10.3390/atmos13010093 https://creativecommons.org/licenses/by/4.0/ Atmosphere; Volume 13; Issue 1; Pages: 93 Greenland ice cores Bayesian changepoint detection ice core δ 18 O atmospheric circulation breakpoint Text 2022 ftmdpi https://doi.org/10.3390/atmos13010093 2023-08-01T03:46:31Z 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 δ18O of Greenland precipitation, we seek synchronous changepoints occurring in ice core-derived δ18O 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 δ18O 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. Text Greenland Greenland ice core Greenland ice cores ice core Ice Sheet North Atlantic North Atlantic oscillation MDPI Open Access Publishing Greenland Atmosphere 13 1 93 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
Greenland ice cores Bayesian changepoint detection ice core δ 18 O atmospheric circulation breakpoint |
spellingShingle |
Greenland ice cores Bayesian changepoint detection ice core δ 18 O atmospheric circulation breakpoint István Gábor Hatvani Dániel Topál Eric Ruggieri Zoltán Kern Concurrent Changepoints in Greenland Ice Core δ18O Records and the North Atlantic Oscillation over the Past Millennium |
topic_facet |
Greenland ice cores Bayesian changepoint detection ice core δ 18 O atmospheric circulation breakpoint |
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 δ18O of Greenland precipitation, we seek synchronous changepoints occurring in ice core-derived δ18O 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 δ18O 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. |
format |
Text |
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 |
title |
Concurrent Changepoints in Greenland Ice Core δ18O Records and the North Atlantic Oscillation over the Past Millennium |
title_short |
Concurrent Changepoints in Greenland Ice Core δ18O Records and the North Atlantic Oscillation over the Past Millennium |
title_full |
Concurrent Changepoints in Greenland Ice Core δ18O Records and the North Atlantic Oscillation over the Past Millennium |
title_fullStr |
Concurrent Changepoints in Greenland Ice Core δ18O Records and the North Atlantic Oscillation over the Past Millennium |
title_full_unstemmed |
Concurrent Changepoints in Greenland Ice Core δ18O Records and the North Atlantic Oscillation over the Past Millennium |
title_sort |
concurrent changepoints in greenland ice core δ18o records and the north atlantic oscillation over the past millennium |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://doi.org/10.3390/atmos13010093 |
op_coverage |
agris |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice core Greenland ice cores ice core Ice Sheet North Atlantic North Atlantic oscillation |
genre_facet |
Greenland Greenland ice core Greenland ice cores ice core Ice Sheet North Atlantic North Atlantic oscillation |
op_source |
Atmosphere; Volume 13; Issue 1; Pages: 93 |
op_relation |
Climatology https://dx.doi.org/10.3390/atmos13010093 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/atmos13010093 |
container_title |
Atmosphere |
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13 |
container_issue |
1 |
container_start_page |
93 |
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1774718127650635776 |