Eemian interglacial reconstructed from a Greenland folded ice core ...

Efforts to extract a Greenland ice core with a complete record of the Eemian interglacial (130,000 to 115,000 years ago) have until now been unsuccessful. The response of the Greenland ice sheet to the warmer-than-present climate of the Eemian has thus remained unclear. Here we present the new North...

Full description

Bibliographic Details
Main Authors: Kipfstuhl, S., Quiquet, A., Ren, J., Grinsted, A., Severinghaus, J. P., Li, J., Hirabayashi, M., Mini, O., Sturevik, A. S., Pol, K., Montagnat-Rentier, M., Fischer, Hubertus, Raynaud, D., Bourgeois, J. C., Azuma, N., Schüpbach, S., Leuschen, C., Sowers, T., Eicher, Olivier, Mulvaney, R., Guillevic, M., Karlsson, N. B., Gfeller, Gideon, Kuramoto, T., Jones, T. R., Sjolte, J., Hansson, M., Steinhage, D., Ditlevsen, P., Keegan, K., Schilt, A., Rybak, O., Albert, M. R., Miyamoto, A., Hansen, S. B., Clausen, H. B., Wilhelms, F., Dahl-Jensen, D., Steffen, K., Vaughn, B. H., Capron, E., Simonsen, S. B., Ritz, C., Kawamura, K., Buchardt, S. L., Popp, T., Seierstad, I., Van De Wal, R. S. W., Huybrechts, P., Berggren, A.-M.
Format: Article in Journal/Newspaper
Language:English
Published: Macmillan Journals Ltd. 2013
Subjects:
620 Engineering
520 Astronomy
530 Physics
Antarctic
Greenland
Antarc*
Greenland ice core
ice core
Ice Sheet
North Greenland
Online Access:https://dx.doi.org/10.7892/boris.58913
http://boris.unibe.ch/58913/
Description
Summary:Efforts to extract a Greenland ice core with a complete record of the Eemian interglacial (130,000 to 115,000 years ago) have until now been unsuccessful. The response of the Greenland ice sheet to the warmer-than-present climate of the Eemian has thus remained unclear. Here we present the new North Greenland Eemian Ice Drilling ('NEEM') ice core and show only a modest ice-sheet response to the strong warming in the early Eemian. We reconstructed the Eemian record from folded ice using globally homogeneous parameters known from dated Greenland and Antarctic ice-core records. On the basis of water stable isotopes, NEEM surface temperatures after the onset of the Eemian (126,000 years ago) peaked at 8±4 degrees Celsius above the mean of the past millennium, followed by a gradual cooling that was probably driven by the decreasing summer insolation. Between 128,000 and 122,000 years ago, the thickness of the northwest Greenland ice sheet decreased by 400±250 metres, reaching surface elevations 122,000 years ago ...

Similar Items