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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ftcaltechauth:oai:authors.library.caltech.edu:105164 2023-05-15T15:00:51+02:00 High-frequency climate variability in the Holocene from a coastal-dome ice core in east-central Greenland Hughes, Abigail G. Jones, Tyler R. Vinther, Bo M. Gkinis, Vasileios Stevens, C. Max Morris, Valerie Vaughn, Bruce H. Holme, Christian Markle, Bradley R. White, James W. C. 2020-07-31 application/pdf https://authors.library.caltech.edu/105164/ https://authors.library.caltech.edu/105164/1/cp-16-1369-2020.pdf https://resolver.caltech.edu/CaltechAUTHORS:20200831-103026258 unknown European Geosciences Union https://authors.library.caltech.edu/105164/1/cp-16-1369-2020.pdf Hughes, Abigail G. and Jones, Tyler R. and Vinther, Bo M. and Gkinis, Vasileios and Stevens, C. Max and Morris, Valerie and Vaughn, Bruce H. and Holme, Christian and Markle, Bradley R. and White, James W. C. (2020) High-frequency climate variability in the Holocene from a coastal-dome ice core in east-central Greenland. Climate of the Past, 16 (4). pp. 1369-1386. ISSN 1814-9332. https://resolver.caltech.edu/CaltechAUTHORS:20200831-103026258 <https://resolver.caltech.edu/CaltechAUTHORS:20200831-103026258> Article PeerReviewed 2020 ftcaltechauth 2020-09-10T17:02:19Z 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 Caltech Authors (California Institute of Technology) Arctic Greenland Renland ENVELOPE(-26.750,-26.750,71.200,71.200) |
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Caltech Authors (California Institute of Technology) |
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ftcaltechauth |
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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 |
Hughes, Abigail G. Jones, Tyler R. Vinther, Bo M. Gkinis, Vasileios Stevens, C. Max Morris, Valerie Vaughn, Bruce H. Holme, Christian Markle, Bradley R. White, James W. C. |
spellingShingle |
Hughes, Abigail G. Jones, Tyler R. Vinther, Bo M. Gkinis, Vasileios Stevens, C. Max Morris, Valerie Vaughn, Bruce H. Holme, Christian Markle, Bradley R. White, James W. C. High-frequency climate variability in the Holocene from a coastal-dome ice core in east-central Greenland |
author_facet |
Hughes, Abigail G. Jones, Tyler R. Vinther, Bo M. Gkinis, Vasileios Stevens, C. Max Morris, Valerie Vaughn, Bruce H. Holme, Christian Markle, Bradley R. White, James W. C. |
author_sort |
Hughes, Abigail G. |
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 |
European Geosciences Union |
publishDate |
2020 |
url |
https://authors.library.caltech.edu/105164/ https://authors.library.caltech.edu/105164/1/cp-16-1369-2020.pdf https://resolver.caltech.edu/CaltechAUTHORS:20200831-103026258 |
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_relation |
https://authors.library.caltech.edu/105164/1/cp-16-1369-2020.pdf Hughes, Abigail G. and Jones, Tyler R. and Vinther, Bo M. and Gkinis, Vasileios and Stevens, C. Max and Morris, Valerie and Vaughn, Bruce H. and Holme, Christian and Markle, Bradley R. and White, James W. C. (2020) High-frequency climate variability in the Holocene from a coastal-dome ice core in east-central Greenland. Climate of the Past, 16 (4). pp. 1369-1386. ISSN 1814-9332. https://resolver.caltech.edu/CaltechAUTHORS:20200831-103026258 <https://resolver.caltech.edu/CaltechAUTHORS:20200831-103026258> |
_version_ |
1766332906843668480 |