Gas isotopes in ice reveal a vegetated central Greenland during ice sheet invasion

Environmental conditions prevailing during build-up of the Greenland Ice Sheet (GIS) are not yet established. Here we use results from gas isotopes from basal ice of the GRIP ice core to show that central Greenland was vegetated during invasion by the ice sheet. The δ 13 CCH4 and δ18O of O2 values o...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Souchez, R., Jouzel, J., Landais, A., Chappellaz, J., Lorrain, R., Tison, J.-L.
Format: Text
Language:unknown
Published: Washington, American Geophysical Union (AGU) 2022
Subjects:
Greenland
GRIP
ice core
Ice Sheet
Online Access:https://doi.org/10.1029/2006GL028424
http://infoscience.epfl.ch/record/298323
Description
Summary:Environmental conditions prevailing during build-up of the Greenland Ice Sheet (GIS) are not yet established. Here we use results from gas isotopes from basal ice of the GRIP ice core to show that central Greenland was vegetated during invasion by the ice sheet. The δ 13 CCH4 and δ18O of O2 values obtained were never encountered before in ice core studies. Such values are indeed the signature of a significant biological activity. Copyright 2006 by the American Geophysical Union.

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