Class Year

2015

Access Type

Open Access

Degree Name

Bachelor of Arts

Department or Program

Earth Science and Geography Department

First Advisor

Kirsten Menking

Abstract

Climate conditions in the Weddell Sea during the Pleistocene can be inferred by examining the abundance of foraminifer species and mineral fragments in ocean sediment cores. In particular, Neogloboquadrina incompta is a useful temperature proxy, and the abundance of terrigenous sediments is an indication of ice rafting. Using percent abundances enables correlation with other climate studies and with a global δ18O isotope stack. The proxies examined indicate at least four oscillations between cold and warm conditions related to global glacial and interglacial stages between 950 and 450 kya, with associated shifts in sea ice extent and deep-water formation.

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