دورية أكاديمية
Active Nordic Seas deep-water formation during the last glacial maximum
| العنوان: | Active Nordic Seas deep-water formation during the last glacial maximum |
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| المؤلفون: | Larkin, Christina S., Mohamed, Mohamed Mahmoud Ezat Ahmed, Roberts, Natalie L., Bauch, Henning A., Spielhagen, Robert F., Noormets, Riko, Polyak, Leonid, Moreton, Steven G., Rasmussen, Tine Lander, Sarnthein, Michael, Tipper, Edward T., Piotrowski, Alex M. |
| بيانات النشر: | Springer Nature |
| سنة النشر: | 2022 |
| المجموعة: | University of Tromsø: Munin Open Research Archive |
| الوصف: | The Nordic Seas are the primary location where the warm waters of the North Atlantic Current densify to form North Atlantic Deep Water, which plays a key part in the modern Atlantic Meridional Overturning Circulation. The formation of dense water in the Nordic Seas and Arctic Ocean and resulting ocean circulation changes were probably driven by and contributed to the regional and global climate of the last glacial maximum (LGM). Here we map the source and degree of mixing of deep water in the Nordic Seas and through the Arctic Gateway (Yermak Plateau) over the past 35 thousand years using neodymium isotopes (εNd) measured on authigenic phases in deep-sea sediments with a high spatial and temporal resolution. We find that a large-scale reorganization of deep-water formation in the Nordic Seas took place between the LGM (23–18 thousand years ago) and the rapid climate shift that accompanied the subsequent deglaciation (18–10 thousand years ago). We show that homogeneous εNd signatures across a wide range of sites support LGM deep-water formation in the Nordic Seas. In contrast, during the deglaciation, disparate and spatially variable εNd values are observed leading to the conclusion that deep-water formation may have been reduced during this time. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 1752-0894 1752-0908 |
| العلاقة: | Nature Geoscience; EC/FP7: 274429; Natural Environment Research Council: NE/L002507/1; Norges forskningsråd: 223259; Natural Environment Research Council: 2117.0418; Tromsø forskningsstiftelse: A31720; Larkin, Mohamed M, Roberts, Bauch HA, Spielhagen RF, Noormets R, Polyak L, Moreton SG, Rasmussen TLR, Sarnthein M, Tipper, Piotrowski. Active Nordic Seas deep-water formation during the last glacial maximum. Nature Geoscience. 2022; FRIDAID 2064807; https://hdl.handle.net/10037/27802Test |
| DOI: | 10.1038/s41561-022-01050-w |
| الإتاحة: | https://doi.org/10.1038/s41561-022-01050-wTest https://hdl.handle.net/10037/27802Test |
| حقوق: | Attribution 4.0 International (CC BY 4.0) ; openAccess ; Copyright 2022 The Author(s) ; https://creativecommons.org/licenses/by/4.0Test |
| رقم الانضمام: | edsbas.B8005099 |
| قاعدة البيانات: | BASE |
| تدمد: | 17520894 17520908 |
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| DOI: | 10.1038/s41561-022-01050-w |