Pliocine Diatom Abundance as Proxy for Temperature in Weddell Sea: ODP Site 697

During the Pliocene, carbon dioxide in the atmosphere was approximately 400 ppm. Today’s atmosphere exhibits similar carbon dioxide levels. Analyzing diatom abundance and changes in species diversity in the Weddell Sea during the Pliocene provides insight into temperature and sea-ice cover changes d...

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Bibliographic Details
Main Author: Robakiewicz, Elena
Format: Text
Language:unknown
Published: Digital Commons at Oberlin 2016
Subjects:
Geology
Weddell
Weddell Sea
Sea ice
Online Access:https://digitalcommons.oberlin.edu/seniorsymp/2016/presentations/43
Description
Summary:During the Pliocene, carbon dioxide in the atmosphere was approximately 400 ppm. Today’s atmosphere exhibits similar carbon dioxide levels. Analyzing diatom abundance and changes in species diversity in the Weddell Sea during the Pliocene provides insight into temperature and sea-ice cover changes during this important time interval. Diatom abundance and diversity at ODP Site 697 displays distinct species oscillations between 3.26 to 3.03 million years ago. Colder periods include 3.23 mya, 3.08 mya, and begin again around 3.03 mya.

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