Gas isotopes in ice reveal a vegetated central Greenland during ice sheet invasion
International audience 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 13CCH4 a...
Published in: | Geophysical Research Letters |
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Main Authors: | , , , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2006
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Subjects: | |
Online Access: | https://insu.hal.science/insu-00375763 https://insu.hal.science/insu-00375763/document https://insu.hal.science/insu-00375763/file/2006GL028424.pdf https://doi.org/10.1029/2006GL028424 |
Summary: | International audience 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 13CCH4 and δ 18O of O2 values obtained were never encountered before in ice core studies. Such values are indeed the signature of a significant biological activity. |
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