Paleoclimate and Hydrology of Bermuda from the Last Interglacial to Today Using Oxygen and Clumped Isotope Geochemistry ...

• Main Author: Zhang, Jade
• Format: Article in Journal/Newspaper
• Language: English
• Published: My University 2023
• Subjects: Isotope Geochemistry; Last Interglacial; Bermuda Hydrology; Paleoclimate; Geology and Earth Sciences; Science; Greenland; Iceland; Nordic Seas; North Atlantic
• Online Access: https://dx.doi.org/10.7302/8302; http://deepblue.lib.umich.edu/handle/2027.42/177845

The Last Interglacial (LIG), also known as Marine Isotope Stage 5e (MIS 5e), was an interval with climate as warm or slightly warmer than today. Global mean sea surface temperatures were reconstructed to be ~2°C warmer than present, accompanied by a ~6-9m increase in the sea level. At the regional scale, this warming was non-uniform. The North Atlantic/Greenland/Iceland/Nordic Seas were reconstructed to be warmer than today, whereas the Central Atlantic/Caribbean Seas were reconstructed to be cooler than modern. Situated at the boundary between these two regions, Bermuda can provide a unique record of Last Interglacial climate. In this dissertation, I conduct and optimize isotopic analyses of modern waters and fossil invertebrates from Bermuda to reconstruct modern hydrology and Last Interglacial climate, respectively. First, I determine the most accurate approach for estimating seasonality by comparing multiple isotopic sampling techniques. Validation of these techniques in the modern, where true ...