GSNZ Wellington branch event
GSNZ Branch event
The nature of the last deglaciation in New Zealand glacial records and the role of antecedent topography.
Over recent years has been intensive investigation of the timing and nature of the last deglaciation (c. 18,000 to 11,500 years ago) in New Zealand mostly using cosmogenic radionuclide chronologies from glacial limits to detail the changes in glacier positions. These events have been interpreted in terms of climatic factors, specifically temperature, though precipitation is also often considered. From these records a rapid phase of warming is inferred in the early deglaciation followed by cooling during the Antarctic Cold Reversal. Comparatively little attention has been paid to the roles of antecedent landforms and glacial sedimentology in controlling the pattern of deglaciation. Here I summarise both geological evidence and a recent modelling study to highlight an alternative deglaciation history. Implications for climatic interpretations will be considered.
Jamie Shulmeister is Professor and Head of School of the new School of Earth and Environment at the University of Canterbury. He is a Quaternary Geologist/Climatic Geomorphologist with an interest in long-term evolution of climate systems in Australasia and SE Asia, including the southern hemisphere westerlies and the Australian and South Asian monsoons. He has worked on glacial, aeolian, lacustrine and coastal systems to investigate these climate histories. He is a former HochstetterLecturer of the GSNZ and a former staff member at VUW. He has ongoing interests in glaciation and landscape evolution in the Southern Alps; aeolian and coastal evolution in eastern Australia and climate evolution in SW China.
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