Calcareous Nannoplankton Assemblages across the Pliocene-Pleistocene Transition in the Southwestern Indian Ocean, IODP Site U1475
International Ocean Discovery Program (IODP) Expedition 361 cored six sites along the greater Agulhas Current system. An objective of this expedition was to determine the dynamics of the Indian-Atlantic Ocean Gateway circulation during Pliocene-Pleistocene climate changes in association with changin...
Main Authors: | , |
---|---|
Other Authors: | |
Format: | Thesis |
Language: | unknown |
Published: |
2018
|
Subjects: | |
Online Access: | https://hdl.handle.net/1969.1/166447 |
id |
fttexasamuniv:oai:oaktrust.library.tamu.edu:1969.1/166447 |
---|---|
record_format |
openpolar |
spelling |
fttexasamuniv:oai:oaktrust.library.tamu.edu:1969.1/166447 2023-07-16T03:54:25+02:00 Calcareous Nannoplankton Assemblages across the Pliocene-Pleistocene Transition in the Southwestern Indian Ocean, IODP Site U1475 Farr, Clinton Layne Cares, Zoe P LeVay, Leah J 2018-05-23T15:31:19Z application/pdf https://hdl.handle.net/1969.1/166447 unknown https://hdl.handle.net/1969.1/166447 Paleo-oceanography Paleoceanography Pliocene-Pleistocene Transition Southern Ocean Ocean circulation Agulhas Agulhas current Agulhas plateau Agulhas retroflection Antarctic glaciation Calcareous nannoplankton Nannoplankton Climate proxy Paleo-climate paleoclimatology Coccolithophorids Indian-Atlantic Ocean Gateway Eccentricity Nannofossils Northern Hemisphere Glaciation Glacial Cycles Pliocene Pleistocene Indian Ocean Thesis text 2018 fttexasamuniv 2023-06-27T23:04:22Z International Ocean Discovery Program (IODP) Expedition 361 cored six sites along the greater Agulhas Current system. An objective of this expedition was to determine the dynamics of the Indian-Atlantic Ocean Gateway circulation during Pliocene-Pleistocene climate changes in association with changing wind fields and migrating ocean fronts. The Indian-Atlantic Ocean Gateway contains a pronounced oceanic frontal system, the position of which has the potential to influence global climate on millennial scales. Owing to the physical differences between the frontal zones, this region has complex biogeochemistry, changes in phytoplankton distribution, and variations in primary productivity. Site U1475 was cored on the Agulhas Plateau in the Southwestern Indian Ocean and recovered a complete sequence of calcareous ooze spanning the last ~7 Ma. The calcareous nannoplankton assemblage shows an increase of taxa associated with cooler water across the Pliocene-Pleistocene Transition (PPT) interval suggesting that a long- term change in sea surface temperature and nutrient availability took place across the PPT, potentially linked to the northward migration of the Subtropical Front. Thesis Antarc* Antarctic Southern Ocean Texas A&M University Digital Repository Antarctic Southern Ocean Indian |
institution |
Open Polar |
collection |
Texas A&M University Digital Repository |
op_collection_id |
fttexasamuniv |
language |
unknown |
topic |
Paleo-oceanography Paleoceanography Pliocene-Pleistocene Transition Southern Ocean Ocean circulation Agulhas Agulhas current Agulhas plateau Agulhas retroflection Antarctic glaciation Calcareous nannoplankton Nannoplankton Climate proxy Paleo-climate paleoclimatology Coccolithophorids Indian-Atlantic Ocean Gateway Eccentricity Nannofossils Northern Hemisphere Glaciation Glacial Cycles Pliocene Pleistocene Indian Ocean |
spellingShingle |
Paleo-oceanography Paleoceanography Pliocene-Pleistocene Transition Southern Ocean Ocean circulation Agulhas Agulhas current Agulhas plateau Agulhas retroflection Antarctic glaciation Calcareous nannoplankton Nannoplankton Climate proxy Paleo-climate paleoclimatology Coccolithophorids Indian-Atlantic Ocean Gateway Eccentricity Nannofossils Northern Hemisphere Glaciation Glacial Cycles Pliocene Pleistocene Indian Ocean Farr, Clinton Layne Cares, Zoe P Calcareous Nannoplankton Assemblages across the Pliocene-Pleistocene Transition in the Southwestern Indian Ocean, IODP Site U1475 |
topic_facet |
Paleo-oceanography Paleoceanography Pliocene-Pleistocene Transition Southern Ocean Ocean circulation Agulhas Agulhas current Agulhas plateau Agulhas retroflection Antarctic glaciation Calcareous nannoplankton Nannoplankton Climate proxy Paleo-climate paleoclimatology Coccolithophorids Indian-Atlantic Ocean Gateway Eccentricity Nannofossils Northern Hemisphere Glaciation Glacial Cycles Pliocene Pleistocene Indian Ocean |
description |
International Ocean Discovery Program (IODP) Expedition 361 cored six sites along the greater Agulhas Current system. An objective of this expedition was to determine the dynamics of the Indian-Atlantic Ocean Gateway circulation during Pliocene-Pleistocene climate changes in association with changing wind fields and migrating ocean fronts. The Indian-Atlantic Ocean Gateway contains a pronounced oceanic frontal system, the position of which has the potential to influence global climate on millennial scales. Owing to the physical differences between the frontal zones, this region has complex biogeochemistry, changes in phytoplankton distribution, and variations in primary productivity. Site U1475 was cored on the Agulhas Plateau in the Southwestern Indian Ocean and recovered a complete sequence of calcareous ooze spanning the last ~7 Ma. The calcareous nannoplankton assemblage shows an increase of taxa associated with cooler water across the Pliocene-Pleistocene Transition (PPT) interval suggesting that a long- term change in sea surface temperature and nutrient availability took place across the PPT, potentially linked to the northward migration of the Subtropical Front. |
author2 |
LeVay, Leah J |
format |
Thesis |
author |
Farr, Clinton Layne Cares, Zoe P |
author_facet |
Farr, Clinton Layne Cares, Zoe P |
author_sort |
Farr, Clinton Layne |
title |
Calcareous Nannoplankton Assemblages across the Pliocene-Pleistocene Transition in the Southwestern Indian Ocean, IODP Site U1475 |
title_short |
Calcareous Nannoplankton Assemblages across the Pliocene-Pleistocene Transition in the Southwestern Indian Ocean, IODP Site U1475 |
title_full |
Calcareous Nannoplankton Assemblages across the Pliocene-Pleistocene Transition in the Southwestern Indian Ocean, IODP Site U1475 |
title_fullStr |
Calcareous Nannoplankton Assemblages across the Pliocene-Pleistocene Transition in the Southwestern Indian Ocean, IODP Site U1475 |
title_full_unstemmed |
Calcareous Nannoplankton Assemblages across the Pliocene-Pleistocene Transition in the Southwestern Indian Ocean, IODP Site U1475 |
title_sort |
calcareous nannoplankton assemblages across the pliocene-pleistocene transition in the southwestern indian ocean, iodp site u1475 |
publishDate |
2018 |
url |
https://hdl.handle.net/1969.1/166447 |
geographic |
Antarctic Southern Ocean Indian |
geographic_facet |
Antarctic Southern Ocean Indian |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
https://hdl.handle.net/1969.1/166447 |
_version_ |
1771551646082400256 |