High-frequency climate variability in the Holocene from a coastal-dome ice core in east-central Greenland
An ice core drilled on the Renland ice cap in east-central Greenland contains a continuous climate record dating through the last glacial period. The Renland record is valuable because the coastal environment is more likely to reflect regional sea surface conditions compared to inland Greenland ice...
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Copernicus Publications
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Online Access: | https://doi.org/10.5194/cp-16-1369-2020 https://cp.copernicus.org/articles/16/1369/2020/cp-16-1369-2020.pdf https://doaj.org/article/ff08b6035e5b48fbb1e87a8773de33b3 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:ff08b6035e5b48fbb1e87a8773de33b3 2023-05-15T15:00:51+02:00 High-frequency climate variability in the Holocene from a coastal-dome ice core in east-central Greenland A. G. Hughes T. R. Jones B. M. Vinther V. Gkinis C. M. Stevens V. Morris B. H. Vaughn C. Holme B. R. Markle J. W. C. White 2020-07-01 https://doi.org/10.5194/cp-16-1369-2020 https://cp.copernicus.org/articles/16/1369/2020/cp-16-1369-2020.pdf https://doaj.org/article/ff08b6035e5b48fbb1e87a8773de33b3 en eng Copernicus Publications doi:10.5194/cp-16-1369-2020 1814-9324 1814-9332 https://cp.copernicus.org/articles/16/1369/2020/cp-16-1369-2020.pdf https://doaj.org/article/ff08b6035e5b48fbb1e87a8773de33b3 undefined Climate of the Past, Vol 16, Pp 1369-1386 (2020) envir anthro-bio Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2020 fttriple https://doi.org/10.5194/cp-16-1369-2020 2023-01-22T19:28:18Z An ice core drilled on the Renland ice cap in east-central Greenland contains a continuous climate record dating through the last glacial period. The Renland record is valuable because the coastal environment is more likely to reflect regional sea surface conditions compared to inland Greenland ice cores that capture synoptic variability. Here we present the δ18O water isotope record for the Holocene, in which decadal-scale climate information is retained for the last 8 kyr, while the annual water isotope signal is preserved throughout the last 2.6 kyr. To investigate regional climate information preserved in the water isotope record, we apply spectral analysis techniques to a 300-year moving window to determine the mean strength of varying frequency bands through time. We find that the strength of 15–20-year δ18O variability exhibits a millennial-scale signal in line with the well-known Bond events. Comparison to other North Atlantic proxy records suggests that the 15–20-year variability may reflect fluctuating sea surface conditions throughout the Holocene, driven by changes in the strength of the Atlantic Meridional Overturning Circulation. Additional analysis of the seasonal signal over the last 2.6 kyr reveals that the winter δ18O signal has experienced a decreasing trend, while the summer signal has predominantly remained stable. The winter trend may correspond to an increase in Arctic sea ice cover, which is driven by a decrease in total annual insolation, and is also likely influenced by regional climate variables such as atmospheric and oceanic circulation. In the context of anthropogenic climate change, the winter trend may have important implications for feedback processes as sea ice retreats in the Arctic. Article in Journal/Newspaper Arctic Climate change Greenland Greenland ice cores Ice cap ice core North Atlantic Sea ice Unknown Arctic Greenland Renland ENVELOPE(-26.750,-26.750,71.200,71.200) Climate of the Past 16 4 1369 1386 |
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language |
English |
topic |
envir anthro-bio |
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envir anthro-bio A. G. Hughes T. R. Jones B. M. Vinther V. Gkinis C. M. Stevens V. Morris B. H. Vaughn C. Holme B. R. Markle J. W. C. White High-frequency climate variability in the Holocene from a coastal-dome ice core in east-central Greenland |
topic_facet |
envir anthro-bio |
description |
An ice core drilled on the Renland ice cap in east-central Greenland contains a continuous climate record dating through the last glacial period. The Renland record is valuable because the coastal environment is more likely to reflect regional sea surface conditions compared to inland Greenland ice cores that capture synoptic variability. Here we present the δ18O water isotope record for the Holocene, in which decadal-scale climate information is retained for the last 8 kyr, while the annual water isotope signal is preserved throughout the last 2.6 kyr. To investigate regional climate information preserved in the water isotope record, we apply spectral analysis techniques to a 300-year moving window to determine the mean strength of varying frequency bands through time. We find that the strength of 15–20-year δ18O variability exhibits a millennial-scale signal in line with the well-known Bond events. Comparison to other North Atlantic proxy records suggests that the 15–20-year variability may reflect fluctuating sea surface conditions throughout the Holocene, driven by changes in the strength of the Atlantic Meridional Overturning Circulation. Additional analysis of the seasonal signal over the last 2.6 kyr reveals that the winter δ18O signal has experienced a decreasing trend, while the summer signal has predominantly remained stable. The winter trend may correspond to an increase in Arctic sea ice cover, which is driven by a decrease in total annual insolation, and is also likely influenced by regional climate variables such as atmospheric and oceanic circulation. In the context of anthropogenic climate change, the winter trend may have important implications for feedback processes as sea ice retreats in the Arctic. |
format |
Article in Journal/Newspaper |
author |
A. G. Hughes T. R. Jones B. M. Vinther V. Gkinis C. M. Stevens V. Morris B. H. Vaughn C. Holme B. R. Markle J. W. C. White |
author_facet |
A. G. Hughes T. R. Jones B. M. Vinther V. Gkinis C. M. Stevens V. Morris B. H. Vaughn C. Holme B. R. Markle J. W. C. White |
author_sort |
A. G. Hughes |
title |
High-frequency climate variability in the Holocene from a coastal-dome ice core in east-central Greenland |
title_short |
High-frequency climate variability in the Holocene from a coastal-dome ice core in east-central Greenland |
title_full |
High-frequency climate variability in the Holocene from a coastal-dome ice core in east-central Greenland |
title_fullStr |
High-frequency climate variability in the Holocene from a coastal-dome ice core in east-central Greenland |
title_full_unstemmed |
High-frequency climate variability in the Holocene from a coastal-dome ice core in east-central Greenland |
title_sort |
high-frequency climate variability in the holocene from a coastal-dome ice core in east-central greenland |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/cp-16-1369-2020 https://cp.copernicus.org/articles/16/1369/2020/cp-16-1369-2020.pdf https://doaj.org/article/ff08b6035e5b48fbb1e87a8773de33b3 |
long_lat |
ENVELOPE(-26.750,-26.750,71.200,71.200) |
geographic |
Arctic Greenland Renland |
geographic_facet |
Arctic Greenland Renland |
genre |
Arctic Climate change Greenland Greenland ice cores Ice cap ice core North Atlantic Sea ice |
genre_facet |
Arctic Climate change Greenland Greenland ice cores Ice cap ice core North Atlantic Sea ice |
op_source |
Climate of the Past, Vol 16, Pp 1369-1386 (2020) |
op_relation |
doi:10.5194/cp-16-1369-2020 1814-9324 1814-9332 https://cp.copernicus.org/articles/16/1369/2020/cp-16-1369-2020.pdf https://doaj.org/article/ff08b6035e5b48fbb1e87a8773de33b3 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-16-1369-2020 |
container_title |
Climate of the Past |
container_volume |
16 |
container_issue |
4 |
container_start_page |
1369 |
op_container_end_page |
1386 |
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1766332902795116544 |