Joint Seminar: How did the Northern hemisphere shift from interglacial to glacial conditions during late Pliocene? And new environment climate condition during Quaternary

This seminar will focus on the context of the Greenland glaciation during late Pliocene. Very often the idea is that this shift is related to a radiative forcing process due to a threshold in atmospheric CO2 level and finally leading to an abrupt glaciation. We will first show that previously to the Greenland inception (2,7 Ma) a large glaciation occurred at 3.3 Ma (MIS-M2) which aborted after 50 Ky. In the first step we shall explain why this glaciation occurred and why it doesn’t led to perennial glaciation over Greenland. In the second step, we will, through sensitivity experiments but also using coupled climate cryosphere modelling, demonstrate that the Greenland glaciation occurred during a long time span involving several glacial/interglacial cycle. We will end this seminar showing some results on the last glacial/interglacial climate changes including abrupt events (Heinrich events) and depict some potential consequences for future climate.

Datum

22.11.2016

Uhrzeit

15:15 Uhr

Ort

Bundesstr. 53, room 022/023
Seminar Room 022/023, Ground Floor, Bundesstrasse 53, 20146 Hamburg, Hamburg

ReferentIn

Gilles Ramstein, Laboratoire des Sciences du Climat et de l'Environnement

Chair

Uwe Mikolajewicz

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