Disentangling influences of climate variability and lake-system evolution on climate proxies derived from isoprenoid and branched glycerol dialkyl glycerol tetraethers (GDGTs): the 250 kyr Lake Chala record
Allix J. Baxter,Francien Peterse,Dirk Verschuren,Aihemaiti Maitituerdi,Nicolas Waldmann,and Jaap S. Sinninghe Damsté
Utrecht University, Faculty of Geosciences, Department of Earth Sciences, Princetonlaan 8A, 3584 CB Utrecht, the Netherlands
NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology and Biogeochemistry, P.O. Box 59, 1790 AB, Den Burg, the Netherlands
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Total article views: 2,939 (including HTML, PDF, and XML)
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Total article views: 2,200 (including HTML, PDF, and XML)
Thereof 2,200 with geography defined
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Total article views: 739 (including HTML, PDF, and XML)
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This study investigates the impact of long-term lake-system evolution on the climate signal recorded by glycerol dialkyl glycerol tetraethers (GDGTs), a popular biomarker in paleoclimate research. It compares downcore changes in GDGTs in the 250 000 year sediment sequence of Lake Chala (Kenya/Tanzania) to independent data for lake mixing and water-column chemistry. These factors influence the GDGT proxies in the earliest depositional phases (before ~180 ka), confounding the climate signal.
This study investigates the impact of long-term lake-system evolution on the climate signal...
