Episodic fresh surface waters in the Eocene Arctic Ocean
It has been suggested, on the basis of modern hydrology and fully coupled palaeoclimate simulations, that the warm greenhouse conditions1 that characterized the early Palaeogene period (55–45 Myr ago) probably induced an intensified hydrological cycle2 with precipitation exceeding evaporation at hig...
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Online Access: | https://orca.cardiff.ac.uk/id/eprint/10754/ https://doi.org/10.1038/nature04692 |
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:10754 2023-05-15T14:28:07+02:00 Episodic fresh surface waters in the Eocene Arctic Ocean Brinkhuis, Henk Schouten, Stefan Collinson, Margaret E. Sluijs, Appy Damsté, Jaap S. Sinninghe Dickens, Gerald R. Huber, Matthew Cronin, Thomas M. Onodera, Jonaotaro Takahashi, Kozo Bujak, Jonathan P. Stein, Ruediger van der Burgh, Johan Eldrett, James S. Harding, Ian C. Lotter, André F. Sangiorgi, Francesca Cittert, Han van Konijnenburg-van de Leeuw, Jan W. Matthiessen, Jens Backman, Jan Moran, Kathryn Clemens, Steve Eynaud, Frédérique Gattacceca, Jérôme Jakobsson, Martin Jordan, Ric Kaminski, Michael King, John Koc, Nalân Martinez, Nahysa C. McInroy, David Moore, Jr, Theodore C. O'Regan, Matthew Pälike, Heiko Rea, Brice Rio, Domenico Sakamoto, Tatsuhiko Smith, David C. St John, Kristen E. K. Suto, Itsuki Suzuki, Noritoshi Watanabe, Mahito Yamamoto, Masanobu 2006 https://orca.cardiff.ac.uk/id/eprint/10754/ https://doi.org/10.1038/nature04692 unknown NPG Brinkhuis, Henk, Schouten, Stefan, Collinson, Margaret E., Sluijs, Appy, Damsté, Jaap S. Sinninghe, Dickens, Gerald R., Huber, Matthew, Cronin, Thomas M., Onodera, Jonaotaro, Takahashi, Kozo, Bujak, Jonathan P., Stein, Ruediger, van der Burgh, Johan, Eldrett, James S., Harding, Ian C., Lotter, André F., Sangiorgi, Francesca, Cittert, Han van Konijnenburg-van, de Leeuw, Jan W., Matthiessen, Jens, Backman, Jan, Moran, Kathryn, Clemens, Steve, Eynaud, Frédérique, Gattacceca, Jérôme, Jakobsson, Martin, Jordan, Ric, Kaminski, Michael, King, John, Koc, Nalân, Martinez, Nahysa C., McInroy, David, Moore, Jr, Theodore C., O'Regan, Matthew, Pälike, Heiko, Rea, Brice, Rio, Domenico, Sakamoto, Tatsuhiko, Smith, David C., St John, Kristen E. K., Suto, Itsuki, Suzuki, Noritoshi, Watanabe, Mahito and Yamamoto, Masanobu 2006. Episodic fresh surface waters in the Eocene Arctic Ocean. Nature 441 (7093) , pp. 606-609. 10.1038/nature04692 https://doi.org/10.1038/nature04692 doi:10.1038/nature04692 GC Oceanography Q Science (General) Article PeerReviewed 2006 ftunivcardiff https://doi.org/10.1038/nature04692 2022-09-25T20:17:42Z It has been suggested, on the basis of modern hydrology and fully coupled palaeoclimate simulations, that the warm greenhouse conditions1 that characterized the early Palaeogene period (55–45 Myr ago) probably induced an intensified hydrological cycle2 with precipitation exceeding evaporation at high latitudes3. Little field evidence, however, has been available to constrain oceanic conditions in the Arctic during this period. Here we analyse Palaeogene sediments obtained during the Arctic Coring Expedition, showing that large quantities of the free-floating fern Azolla grew and reproduced in the Arctic Ocean by the onset of the middle Eocene epoch (50 Myr ago). The Azolla and accompanying abundant freshwater organic and siliceous microfossils indicate an episodic freshening of Arctic surface waters during an 800,000-year interval. The abundant remains of Azolla that characterize basal middle Eocene marine deposits of all Nordic seas4, 5, 6, 7 probably represent transported assemblages resulting from freshwater spills from the Arctic Ocean that reached as far south as the North Sea8. The termination of the Azolla phase in the Arctic coincides with a local sea surface temperature rise from 10 °C to 13 °C, pointing to simultaneous increases in salt and heat supply owing to the influx of waters from adjacent oceans. We suggest that onset and termination of the Azolla phase depended on the degree of oceanic exchange between Arctic Ocean and adjacent seas. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Cardiff University: ORCA (Online Research @ Cardiff) Arctic Arctic Ocean Nature 441 7093 606 609 |
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Cardiff University: ORCA (Online Research @ Cardiff) |
op_collection_id |
ftunivcardiff |
language |
unknown |
topic |
GC Oceanography Q Science (General) |
spellingShingle |
GC Oceanography Q Science (General) Brinkhuis, Henk Schouten, Stefan Collinson, Margaret E. Sluijs, Appy Damsté, Jaap S. Sinninghe Dickens, Gerald R. Huber, Matthew Cronin, Thomas M. Onodera, Jonaotaro Takahashi, Kozo Bujak, Jonathan P. Stein, Ruediger van der Burgh, Johan Eldrett, James S. Harding, Ian C. Lotter, André F. Sangiorgi, Francesca Cittert, Han van Konijnenburg-van de Leeuw, Jan W. Matthiessen, Jens Backman, Jan Moran, Kathryn Clemens, Steve Eynaud, Frédérique Gattacceca, Jérôme Jakobsson, Martin Jordan, Ric Kaminski, Michael King, John Koc, Nalân Martinez, Nahysa C. McInroy, David Moore, Jr, Theodore C. O'Regan, Matthew Pälike, Heiko Rea, Brice Rio, Domenico Sakamoto, Tatsuhiko Smith, David C. St John, Kristen E. K. Suto, Itsuki Suzuki, Noritoshi Watanabe, Mahito Yamamoto, Masanobu Episodic fresh surface waters in the Eocene Arctic Ocean |
topic_facet |
GC Oceanography Q Science (General) |
description |
It has been suggested, on the basis of modern hydrology and fully coupled palaeoclimate simulations, that the warm greenhouse conditions1 that characterized the early Palaeogene period (55–45 Myr ago) probably induced an intensified hydrological cycle2 with precipitation exceeding evaporation at high latitudes3. Little field evidence, however, has been available to constrain oceanic conditions in the Arctic during this period. Here we analyse Palaeogene sediments obtained during the Arctic Coring Expedition, showing that large quantities of the free-floating fern Azolla grew and reproduced in the Arctic Ocean by the onset of the middle Eocene epoch (50 Myr ago). The Azolla and accompanying abundant freshwater organic and siliceous microfossils indicate an episodic freshening of Arctic surface waters during an 800,000-year interval. The abundant remains of Azolla that characterize basal middle Eocene marine deposits of all Nordic seas4, 5, 6, 7 probably represent transported assemblages resulting from freshwater spills from the Arctic Ocean that reached as far south as the North Sea8. The termination of the Azolla phase in the Arctic coincides with a local sea surface temperature rise from 10 °C to 13 °C, pointing to simultaneous increases in salt and heat supply owing to the influx of waters from adjacent oceans. We suggest that onset and termination of the Azolla phase depended on the degree of oceanic exchange between Arctic Ocean and adjacent seas. |
format |
Article in Journal/Newspaper |
author |
Brinkhuis, Henk Schouten, Stefan Collinson, Margaret E. Sluijs, Appy Damsté, Jaap S. Sinninghe Dickens, Gerald R. Huber, Matthew Cronin, Thomas M. Onodera, Jonaotaro Takahashi, Kozo Bujak, Jonathan P. Stein, Ruediger van der Burgh, Johan Eldrett, James S. Harding, Ian C. Lotter, André F. Sangiorgi, Francesca Cittert, Han van Konijnenburg-van de Leeuw, Jan W. Matthiessen, Jens Backman, Jan Moran, Kathryn Clemens, Steve Eynaud, Frédérique Gattacceca, Jérôme Jakobsson, Martin Jordan, Ric Kaminski, Michael King, John Koc, Nalân Martinez, Nahysa C. McInroy, David Moore, Jr, Theodore C. O'Regan, Matthew Pälike, Heiko Rea, Brice Rio, Domenico Sakamoto, Tatsuhiko Smith, David C. St John, Kristen E. K. Suto, Itsuki Suzuki, Noritoshi Watanabe, Mahito Yamamoto, Masanobu |
author_facet |
Brinkhuis, Henk Schouten, Stefan Collinson, Margaret E. Sluijs, Appy Damsté, Jaap S. Sinninghe Dickens, Gerald R. Huber, Matthew Cronin, Thomas M. Onodera, Jonaotaro Takahashi, Kozo Bujak, Jonathan P. Stein, Ruediger van der Burgh, Johan Eldrett, James S. Harding, Ian C. Lotter, André F. Sangiorgi, Francesca Cittert, Han van Konijnenburg-van de Leeuw, Jan W. Matthiessen, Jens Backman, Jan Moran, Kathryn Clemens, Steve Eynaud, Frédérique Gattacceca, Jérôme Jakobsson, Martin Jordan, Ric Kaminski, Michael King, John Koc, Nalân Martinez, Nahysa C. McInroy, David Moore, Jr, Theodore C. O'Regan, Matthew Pälike, Heiko Rea, Brice Rio, Domenico Sakamoto, Tatsuhiko Smith, David C. St John, Kristen E. K. Suto, Itsuki Suzuki, Noritoshi Watanabe, Mahito Yamamoto, Masanobu |
author_sort |
Brinkhuis, Henk |
title |
Episodic fresh surface waters in the Eocene Arctic Ocean |
title_short |
Episodic fresh surface waters in the Eocene Arctic Ocean |
title_full |
Episodic fresh surface waters in the Eocene Arctic Ocean |
title_fullStr |
Episodic fresh surface waters in the Eocene Arctic Ocean |
title_full_unstemmed |
Episodic fresh surface waters in the Eocene Arctic Ocean |
title_sort |
episodic fresh surface waters in the eocene arctic ocean |
publisher |
NPG |
publishDate |
2006 |
url |
https://orca.cardiff.ac.uk/id/eprint/10754/ https://doi.org/10.1038/nature04692 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Arctic Ocean |
op_relation |
Brinkhuis, Henk, Schouten, Stefan, Collinson, Margaret E., Sluijs, Appy, Damsté, Jaap S. Sinninghe, Dickens, Gerald R., Huber, Matthew, Cronin, Thomas M., Onodera, Jonaotaro, Takahashi, Kozo, Bujak, Jonathan P., Stein, Ruediger, van der Burgh, Johan, Eldrett, James S., Harding, Ian C., Lotter, André F., Sangiorgi, Francesca, Cittert, Han van Konijnenburg-van, de Leeuw, Jan W., Matthiessen, Jens, Backman, Jan, Moran, Kathryn, Clemens, Steve, Eynaud, Frédérique, Gattacceca, Jérôme, Jakobsson, Martin, Jordan, Ric, Kaminski, Michael, King, John, Koc, Nalân, Martinez, Nahysa C., McInroy, David, Moore, Jr, Theodore C., O'Regan, Matthew, Pälike, Heiko, Rea, Brice, Rio, Domenico, Sakamoto, Tatsuhiko, Smith, David C., St John, Kristen E. K., Suto, Itsuki, Suzuki, Noritoshi, Watanabe, Mahito and Yamamoto, Masanobu 2006. Episodic fresh surface waters in the Eocene Arctic Ocean. Nature 441 (7093) , pp. 606-609. 10.1038/nature04692 https://doi.org/10.1038/nature04692 doi:10.1038/nature04692 |
op_doi |
https://doi.org/10.1038/nature04692 |
container_title |
Nature |
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441 |
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7093 |
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