Schouten, Stefan; Eldrett, James; Greenwood, David R.; Harding, Ian; Baas, Marianne; Sinninghe Damste, Jaap S. (2008): Onset of long-term cooling of Greenland near the Eocene-Oligocene boundary as revealed by branched tetraether lipids. Geological Society of America (GSA), Boulder, CO, United States, Geology (Boulder), 36 (2), 147-150, georefid:2008-062595

The Eocene-Oligocene (E-O) boundary interval is considered to be one of the major transitions in Earth's climate, witnessing the first major expansion of the East Antarctic Ice Sheet. However, the extent of the associated climatic cooling, especially for high northern latitude continental landmasses, is poorly constrained. In this study we reconstruct the first mean annual air temperature (MAAT) for the Greenland landmass during the late Eocene and early Oligocene by applying a new proxy based on the distribution of branched tetraether lipids derived from soil bacteria preserved in a marine sediment core from the Greenland Basin. The temperature estimates are compared with a composite continental temperature record based on bio-climatic analysis of pollen assemblages. Both proxies reveal comparable late Eocene MAATs of approximately 13-15 degrees C and a gradual long-term cooling of approximately 3-5 degrees C starting near the E-O boundary. These data are in agreement with other MAAT reconstructions from northern midlatitude continents and suggest a general cooling of the Northern Hemisphere during the E-O transition.
West: -6.5648 East: 1.0200 North: 75.2921 South: 66.5629
Expedition: 104
Site: 104-643
Expedition: 151
Site: 151-913
Expedition: 162
Site: 162-985
Supplemental Information:
With GSA Data Repository Item 2008035
Data access:
Provider: SEDIS Publication Catalogue
Data set link: (c.f. for more detailed metadata)
This metadata in ISO19139 XML format