NBIA Colloquium via Zoom by Sune Olander Rasmussen (NBI)

Abrupt Climate Changes and Greenland Ice Cores

Speaker: Sune Olander Rasmussen (NBI)

Abstract: The Niels Bohr Institute has been among the world's leading institutions since the start of ice-core research, and NBI's professor Willi Dansgaard (1922-2011) pioneered the use of oxygen isotope measurements as tools in climate science. His name is also attached to the most prominent examples of abrupt climate changes in recent geological time: The so-called Dansgaard-Oeschger events, characterized by temperature changes in Greenland of 5-16 °C, often taking place in decades. The talk will briefly introduce ice-core drilling in a NBI-centric historical context and argue why ice-cores are ideal archives of past climate change. The talk will then present new high-resolution analyses of ice-core data and comprehensive climate model simulations which provide a lot of information about the anatomy and dynamics of the Dansgaard-Oeschger events, but also raise new questions about the nature of these changes.

Bio-sketch: Sune Olander Rasmussen holds a PhD in geophysics from NBI (2006). After being the coordinator at the DNRF Centre of excellence for Ice and Climate in 2007-2017, he was tenured at NBI and received a Carlsberg Foundation Distinguished Associate Professorship. He works at the cross-section of palaeoclimate stratigraphy and dating, signal analysis, and climate data analysis. Sune played a key role in the development of ice-core stratigraphy and chronology methods and tools, as well as methods and tools for synchronization of records from ice cores and other climate data archives. He also led the EU-funded COST Action INTIMATE (INTegrating Ice core, MArine and TErrestrial records). 

To participate on Friday, click on

https://ucph-ku.zoom.us/j/61333932427

The colloquium will be introduced and moderated by Poul Henrik Damgaard and we strongly encourage you to participate actively by asking questions during the talk. Poul Henrik will briefly remind you how this can be done just before the colloquium starts.