The impact of climate-ice sheet interactions on abrupt climate changes in the long-term past and their importance for the future climate

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

• Marie-Luise Kapsch (Max Planck Institute for Meteorology)
• Wednesday 12 February 2025, 17:30-19:00
• Latimer Room, Clare College.

If you have a question about this talk, please contact wb350.

The simulation of the last deglaciation (about 20.000 years before present to present) represents a hitherto unsolved challenge for comprehensive state-of-the-art climate models. During my presentation, I will introduce our novel coupled atmosphere-ocean-vegetation-ice sheet-solid earth model that is used to simulate the transient climate. An ensemble of transient model simulations successfully captures the main features of the last deglaciation, as depicted by proxy estimates. In addition, our model simulates a series of abrupt climate changes, which can be attributed to different drivers that will be discussed throughout the presentation. I will furthermore show, how the model can be applied for simulations of the long-term future. The future simulations show, that parts of the Antarctic ice sheet become unstable even under low-emission scenarios, with significant implications for the modelled climate response. Sensitivity experiments additionally show that, the Greenland ice sheet may exhibit multiple steady-states under pre-industrial climate conditions. This has significant implications for a potential regrowth, once disintegrated entirely.

This talk is part of the Quaternary Discussion Group (QDG) series.

This talk is included in these lists:

• AUB_Cambridge Seminars
• Climate Science Seminars within Cambridge
• Department of Earth Sciences seminars
• Department of Geography
• Latimer Room, Clare College
• Quaternary Discussion Group (QDG)
• Type the title of a new list here
• ld636
• seminars

Note that ex-directory lists are not shown.