Institutskolloquium Physische Geographie – 11.07.2018
Brewster Glacier – a benchmark for investigating glacierclimate interactions in the Southern Alps of New Zealand
Nicolas Cullen (University of Otago, Neuseeland)
The advance of some fast-responding glaciers in the Southern Alps of New Zealand at the end of the 20th and beginning of the 21st century during three of the warmest decades of the instrumental era provides clear evidence that changes in large-scale atmospheric circulation in the Southern Hemisphere can act as a counter-punch to global warming. The Southern Alps are surrounded by vast areas of ocean and are strongly influenced by both subtropical and polar air masses, with the interaction of these contrasting air masses in the prevailing westerly airflow resulting in weather systems having a strong influence on glacier mass balance. Until recently, one of the challenges in assessing how large-scale atmospheric circulation influences glacier behaviour has been the lack of observational data from high-elevation sites in the Southern Alps. However, high-quality meteorological and glaciological observations from Brewster Glacier allow us to now assess in detail how atmospheric processes at different scales influence glacier behaviour. This talk will provide details about the observational programme on Brewster Glacier, which has been continuous for over a decade, and then target how weather systems influence daily ablation and precipitation (snowfall).
Wann: Mittwoch, 11.07.2018 um 12:15 Uhr
Wo: Hörsaal C, Kochstr. 4 (Eingang Hindenburgstraße)
Gesamtübersicht Kolloquiumsprogramm im Sommersemester 2018