16°C rapid temperature variation in Central Greenland 70,000 years ago
Variations in the 29N2/28N2 ratio of air bubbles trapped in polar ice cores and their relation to variations of the 18O/16O of the ice allow past surface temperature variations and ice age–gas age differences to be determined. High-resolution measurements of29N2/28N2 in Dansgaard-Oeschger event 19 (...
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American Association for the Advancement of Science
1999
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ftdatacite:10.48350/158271 2023-05-15T16:27:15+02:00 16°C rapid temperature variation in Central Greenland 70,000 years ago Lang, C. Leuenberger, M. Schwander, J. Johnson, S. 1999 https://dx.doi.org/10.48350/158271 https://boris.unibe.ch/158271/ unknown American Association for the Advancement of Science restricted access publisher holds copyright http://purl.org/coar/access_right/c_16ec 530 Physics Text article-journal journal article ScholarlyArticle 1999 ftdatacite https://doi.org/10.48350/158271 2021-11-05T12:55:41Z Variations in the 29N2/28N2 ratio of air bubbles trapped in polar ice cores and their relation to variations of the 18O/16O of the ice allow past surface temperature variations and ice age–gas age differences to be determined. High-resolution measurements of29N2/28N2 in Dansgaard-Oeschger event 19 (around 70,000 years before the present) in ice from Central Greenland show that at the beginning of the event, the ice age–gas age difference was 1090 ± 100 years. With the use of a combined firn densification, temperature, and gas diffusion model, the δ18Oice-temperature coefficient α was determined to be 0.42 ± 0.05 per mil per kelvin. This coefficient implies a mean surface temperature change of 16.0 kelvin (between 14.3 and 18.1 kelvin), which differs substantially from values derived from borehole temperatures and modern spatial δ18Oice–surface temperature correlations. Text Greenland DataCite Metadata Store (German National Library of Science and Technology) Greenland |
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DataCite Metadata Store (German National Library of Science and Technology) |
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topic |
530 Physics |
spellingShingle |
530 Physics Lang, C. Leuenberger, M. Schwander, J. Johnson, S. 16°C rapid temperature variation in Central Greenland 70,000 years ago |
topic_facet |
530 Physics |
description |
Variations in the 29N2/28N2 ratio of air bubbles trapped in polar ice cores and their relation to variations of the 18O/16O of the ice allow past surface temperature variations and ice age–gas age differences to be determined. High-resolution measurements of29N2/28N2 in Dansgaard-Oeschger event 19 (around 70,000 years before the present) in ice from Central Greenland show that at the beginning of the event, the ice age–gas age difference was 1090 ± 100 years. With the use of a combined firn densification, temperature, and gas diffusion model, the δ18Oice-temperature coefficient α was determined to be 0.42 ± 0.05 per mil per kelvin. This coefficient implies a mean surface temperature change of 16.0 kelvin (between 14.3 and 18.1 kelvin), which differs substantially from values derived from borehole temperatures and modern spatial δ18Oice–surface temperature correlations. |
format |
Text |
author |
Lang, C. Leuenberger, M. Schwander, J. Johnson, S. |
author_facet |
Lang, C. Leuenberger, M. Schwander, J. Johnson, S. |
author_sort |
Lang, C. |
title |
16°C rapid temperature variation in Central Greenland 70,000 years ago |
title_short |
16°C rapid temperature variation in Central Greenland 70,000 years ago |
title_full |
16°C rapid temperature variation in Central Greenland 70,000 years ago |
title_fullStr |
16°C rapid temperature variation in Central Greenland 70,000 years ago |
title_full_unstemmed |
16°C rapid temperature variation in Central Greenland 70,000 years ago |
title_sort |
16°c rapid temperature variation in central greenland 70,000 years ago |
publisher |
American Association for the Advancement of Science |
publishDate |
1999 |
url |
https://dx.doi.org/10.48350/158271 https://boris.unibe.ch/158271/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_rights |
restricted access publisher holds copyright http://purl.org/coar/access_right/c_16ec |
op_doi |
https://doi.org/10.48350/158271 |
_version_ |
1766016365425065984 |