APPLICATIONS OF IN SITU 14C TO GLACIAL LANDSCAPES IN SWEDEN AND ANTARCTICA ...

• Main Author: Koester, Alexandria
• Format: Text
• Language: unknown
• Published: Purdue University Graduate School 2023
• Subjects: Geochronology; Isotope geochemistry; Antarc*; Antarctica; Ice Sheet
• Online Access: https://dx.doi.org/10.25394/pgs.22696426; https://hammer.purdue.edu/articles/thesis/APPLICATIONS_OF_IN_SITU_14C_TO_GLACIAL_LANDSCAPES_IN_SWEDEN_AND_ANTARCTICA/22696426

Reconstructing past glacier and ice-sheet extents is important to better understand how glacial systems have responded to past climate changes in hope of constraining predictions of their responses to ongoing anthropogenic climate warming. As such, the most recent period of climatic variations, from the Last Glacial Maximum (LGM, ca. 21 ka) through today, is of great interest as a prominent example of how ice has reacted to past climatic warming events. Surface exposure dating utilizing cosmogenic nuclides can directly constrain when past ice deglaciated in current and former glacial landscapes. Numerous studies have utilized long-lived cosmogenic radionuclides (i.e., 10Be, 26Al) in polar regions to reconstruct glacial systems. However, due to prevalent non-erosive cold-based ice, prior nuclides from pre-LGM can be preserved. The research described in this dissertation applies in situ cosmogenic 14C ( in situ 14C), an emerging geochronometer, to polar glacial landscapes in Sweden and Antarctica to constrain ...