Modelling the northern hemisphere and Antarctic ice sheet changes through the last glacial cycle ...

• Main Author: Coutts, Brendan
• Format: Thesis
• Language: unknown
• Published: University Of Tasmania 2023
• Subjects: Antarctic; Rayner; The Antarctic; Antarc*; Ice Sheet; Ice Shelf
• Online Access: https://dx.doi.org/10.25959/23233520.v1; https://figshare.utas.edu.au/articles/thesis/Modelling_the_northern_hemisphere_and_Antarctic_ice_sheet_changes_through_the_last_glacial_cycle/23233520/1

In order to gain a proper understanding of the present state of the Earth's cryosphere in relation to its environment, it is desirable to have a sound knowledge of the glacial history which led to the present conditions. In this study, the ice sheets of the northern hemisphere and the Antarctic are modelled through the last glacial cycle in order to gain some understanding of both present and palaeo environments. The results of the energy balance model of Budd and Rayner (1993), which was driven by orbital variations in radiation as well as internal climate and ice sheet feedbacks, provides the shape of the time series of primary climate forcing for global ice sheet modelling. The amplitude of the climate forcing comes from matching palaeo-reconstructions of ice margins, sea level, temperature and accumulation rate. The ice sheet model is coupled to an ice shelf model and includes isostatic adjustment of the bedrock as well as simple thermodynamics. Results for the northern hemisphere modelling indicated ...