High resolution ice core records of climate variability and forcing ...

• Main Author: Pedro, JB
• Format: Thesis
• Language: unknown
• Published: University Of Tasmania 2023
• Subjects: Antarctic; East Antarctica; Law Dome; Antarc*; Antarctica; ice core
• Online Access: https://dx.doi.org/10.25959/23206661.v1; https://figshare.utas.edu.au/articles/thesis/High_resolution_ice_core_records_of_climate_variability_and_forcing/23206661/1

This thesis exploits the high temporal resolution and precise dating of ice cores from Law Dome, coastal East Antarctica, to address questions concerning climate forcings, variability and feedbacks over a range of timescales: (i) sub-annual to decadal-scale environmental influences on the \\(^{10}\\)Be solar activity proxy; (ii) centennial to millennial-scale internal climate variability; and (iii) the phase relationship between Antarctic temperature and atmospheric CO\\(_2\\) during the last deglaciation. Cosmogenic \\(^{10}\\)Be is a primary ice core proxy for past solar activity. However, interpretation of the \\(^{10}\\)Be record is hindered by limited understanding of the physical processes governing its atmospheric transport and deposition to the ice sheets. The thesis presents a suite of monthly to annually-resolved Law Dome \\(^{10}\\)Be records, which combined span 1936-2009. The records are quantitatively assessed against observed cosmic ray intensities, instrumental and reanalysis climate data and ...