University of Cambridge > Talks.cam > Department of Earth Sciences Seminars (downtown) >  Geochemical Insights into Antarctic Ice Sheet Stability

Geochemical Insights into Antarctic Ice Sheet Stability

Add to your list(s) Download to your calendar using vCal

If you have a question about this talk, please contact Oscar Branson.

Future sea level change is one of the most serious, and yet poorly constrained, impacts of anthropogenic climate change. One of the issues is the lack of observational data of very slow, glacial processes, which makes it difficult to parameterise them accurately in ice sheet models. Some attempts have therefore been made to “tune” ice sheet models using palaeoclimate records, and to use these tuned models to project future sea level rise. However, these projections are somewhat controversial, largely because of the uncertainties associated with the past sea level reconstructions. Here I discuss some approaches to improve our reconstructions of past ice sheet variability using geochemical techniques. I also present some intriguing geochemical data and modelling results from the Oligocene-Miocene Transition (~23 million years ago), which casts some doubt on the traditional way we view the evolution of Earth’s Cryosphere as a simple progression from greenhouse to unipolar icehouse, to bipolar icehouse conditions.

This talk is part of the Department of Earth Sciences Seminars (downtown) series.

Tell a friend about this talk:

This talk is included in these lists:

Note that ex-directory lists are not shown.

 

© 2006-2023 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity