Orbitally forced climate changes in the Tasman sector during the Middle Eocene
The influence of orbital precession on early Paleogene climate and ocean circulation patterns in the southeast Pacific region is investigated by combining environmental analyses of cyclic Middle Eocene sediments and palynomorph records recovered from ODP Hole 1172A on the East Tasman Plateau with cl...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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Purdue University
2009
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Online Access: | https://docs.lib.purdue.edu/easpubs/88 https://doi.org/10.1016/j.palaeo.2009.06.023 https://docs.lib.purdue.edu/context/easpubs/article/1087/viewcontent/EAS_88_Sriver_Huber.pdf |
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ftpurdueuniv:oai:docs.lib.purdue.edu:easpubs-1087 2023-07-02T03:30:37+02:00 Orbitally forced climate changes in the Tasman sector during the Middle Eocene Warnaar, Jeroen Bijl, Peter K. Huber, Matthew Sloan, Lisa Brinkhuis, Henk Röhl, Ursula Sriver, Ryan Visscher, Henk 2009-06-21T07:00:00Z application/pdf https://docs.lib.purdue.edu/easpubs/88 https://doi.org/10.1016/j.palaeo.2009.06.023 https://docs.lib.purdue.edu/context/easpubs/article/1087/viewcontent/EAS_88_Sriver_Huber.pdf unknown Purdue University https://docs.lib.purdue.edu/easpubs/88 doi:10.1016/j.palaeo.2009.06.023 https://docs.lib.purdue.edu/context/easpubs/article/1087/viewcontent/EAS_88_Sriver_Huber.pdf Department of Earth, Atmospheric, and Planetary Sciences Faculty Publications southern ocean middle eocene orbital forcing model-data comparison organic-walled dinoflagellate cysts general circulationmodel text 2009 ftpurdueuniv https://doi.org/10.1016/j.palaeo.2009.06.023 2023-06-12T20:42:58Z The influence of orbital precession on early Paleogene climate and ocean circulation patterns in the southeast Pacific region is investigated by combining environmental analyses of cyclic Middle Eocene sediments and palynomorph records recovered from ODP Hole 1172A on the East Tasman Plateau with climate model simulations. Integration of results indicates that in the marine realm, direct effects of precessional forcing are not pronounced, although increased precipitation/runoff could have enhanced dinoflagellate cyst production. On the southeast Australian continent, the most pronounced effects of precessional forcing were fluctuations in summer precipitation and temperature on the Antarctic Margin. These fluctuations resulted in vegetational changes, most notably in the distribution of Nothofagus (subgenus Brassospora). The climate model results suggest significant fluctuations in sea ice in the Ross Sea, notably during Austral summers. This is consistent with the influx of Antarctic heterotrophic dinoflagellates in the early part of the studied record. The data demonstrate a strong precessionally driven climate variability and thus support the concept that precessional forcing could have played a role in early Antarctic glaciation via changes in runoff and/or precipitation. Text Antarc* Antarctic Ross Sea Sea ice Southern Ocean Purdue University: e-Pubs Antarctic Austral Pacific Ross Sea Southern Ocean The Antarctic Palaeogeography, Palaeoclimatology, Palaeoecology 280 3-4 361 370 |
institution |
Open Polar |
collection |
Purdue University: e-Pubs |
op_collection_id |
ftpurdueuniv |
language |
unknown |
topic |
southern ocean middle eocene orbital forcing model-data comparison organic-walled dinoflagellate cysts general circulationmodel |
spellingShingle |
southern ocean middle eocene orbital forcing model-data comparison organic-walled dinoflagellate cysts general circulationmodel Warnaar, Jeroen Bijl, Peter K. Huber, Matthew Sloan, Lisa Brinkhuis, Henk Röhl, Ursula Sriver, Ryan Visscher, Henk Orbitally forced climate changes in the Tasman sector during the Middle Eocene |
topic_facet |
southern ocean middle eocene orbital forcing model-data comparison organic-walled dinoflagellate cysts general circulationmodel |
description |
The influence of orbital precession on early Paleogene climate and ocean circulation patterns in the southeast Pacific region is investigated by combining environmental analyses of cyclic Middle Eocene sediments and palynomorph records recovered from ODP Hole 1172A on the East Tasman Plateau with climate model simulations. Integration of results indicates that in the marine realm, direct effects of precessional forcing are not pronounced, although increased precipitation/runoff could have enhanced dinoflagellate cyst production. On the southeast Australian continent, the most pronounced effects of precessional forcing were fluctuations in summer precipitation and temperature on the Antarctic Margin. These fluctuations resulted in vegetational changes, most notably in the distribution of Nothofagus (subgenus Brassospora). The climate model results suggest significant fluctuations in sea ice in the Ross Sea, notably during Austral summers. This is consistent with the influx of Antarctic heterotrophic dinoflagellates in the early part of the studied record. The data demonstrate a strong precessionally driven climate variability and thus support the concept that precessional forcing could have played a role in early Antarctic glaciation via changes in runoff and/or precipitation. |
format |
Text |
author |
Warnaar, Jeroen Bijl, Peter K. Huber, Matthew Sloan, Lisa Brinkhuis, Henk Röhl, Ursula Sriver, Ryan Visscher, Henk |
author_facet |
Warnaar, Jeroen Bijl, Peter K. Huber, Matthew Sloan, Lisa Brinkhuis, Henk Röhl, Ursula Sriver, Ryan Visscher, Henk |
author_sort |
Warnaar, Jeroen |
title |
Orbitally forced climate changes in the Tasman sector during the Middle Eocene |
title_short |
Orbitally forced climate changes in the Tasman sector during the Middle Eocene |
title_full |
Orbitally forced climate changes in the Tasman sector during the Middle Eocene |
title_fullStr |
Orbitally forced climate changes in the Tasman sector during the Middle Eocene |
title_full_unstemmed |
Orbitally forced climate changes in the Tasman sector during the Middle Eocene |
title_sort |
orbitally forced climate changes in the tasman sector during the middle eocene |
publisher |
Purdue University |
publishDate |
2009 |
url |
https://docs.lib.purdue.edu/easpubs/88 https://doi.org/10.1016/j.palaeo.2009.06.023 https://docs.lib.purdue.edu/context/easpubs/article/1087/viewcontent/EAS_88_Sriver_Huber.pdf |
geographic |
Antarctic Austral Pacific Ross Sea Southern Ocean The Antarctic |
geographic_facet |
Antarctic Austral Pacific Ross Sea Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Ross Sea Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Ross Sea Sea ice Southern Ocean |
op_source |
Department of Earth, Atmospheric, and Planetary Sciences Faculty Publications |
op_relation |
https://docs.lib.purdue.edu/easpubs/88 doi:10.1016/j.palaeo.2009.06.023 https://docs.lib.purdue.edu/context/easpubs/article/1087/viewcontent/EAS_88_Sriver_Huber.pdf |
op_doi |
https://doi.org/10.1016/j.palaeo.2009.06.023 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
280 |
container_issue |
3-4 |
container_start_page |
361 |
op_container_end_page |
370 |
_version_ |
1770274815963299840 |