Calcareous Nannoplankton Assemblages across the Pliocene-Pleistocene Transition in the Southwestern Indian Ocean, IODP Site U1475
![Thumbnail](/bitstream/handle/1969.1/166447/FARR-FINALTHESIS-2018.pdf.jpg?sequence=7&isAllowed=y)
View/
Open
Metadata
Show full item recordAbstract
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.
Citation
Farr, Clinton Layne; Cares, Zoe P (2018). Calcareous Nannoplankton Assemblages across the Pliocene-Pleistocene Transition in the Southwestern Indian Ocean, IODP Site U1475. Undergraduate Research Scholars Program. Available electronically from https : / /hdl .handle .net /1969 .1 /166447.
Related items
Showing items related by title, author, creator and subject.
-
Whitworth, Thomas (Texas A&M University. Libraries, )The Antarctic Circumpolar Current in Drake Passage comprises four regimes which are characterized by distinct temperature-salinity relationships in the near-surface waters and by different depths of common temperature-salinity ...
-
Cheon, Woo Geunn (2009-05-15)This dissertation discusses a linkage between the Southern Ocean (SO) winds and the global ocean circulation in the framework of a coarse-resolution global ocean general circulation model coupled to a sea-ice model. In ...
-
Kurtakoti, Prajvala Kishore (2019-04-18)Open ocean polynyas (OOPs) in the Southern Ocean are ice-free areas within the winter ice pack that are associated with deep convection, potentially contributing to the formation of Antarctic Bottom Water (AABW). To enhance ...