Journal
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
Volume 419, Issue -, Pages 90-99Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.palaeo.2014.07.026
Keywords
Arctic Ocean; Quaternary ostracodes; Mid-Pleistocene Transition; Mid-Brunhes Event
Funding
- U.S. Geological Survey Climate and Land Use RD Program
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An early to middle Pleistocene ostracode fauna was discovered in sediment core P1-93-AR-23 (P23, 76.95 degrees N, 155.07 degrees W) from 951 meter water depth from the Northwind Ridge, western Arctic Ocean. Piston core P23 yielded more than 30,000 specimens and a total of about 30 species. Several early to mid-Pleistocene species in the genera Krithe, Echinogthereis, Pterygocythereis, and Arcacythere are now extinct in the Arctic and show taxonomic affinities to North Atlantic Ocean species. Our results suggest that there was a major ostracode faunal turnover during the global climate transitions known as the Mid-Pleistocene Transition (MPT, similar to 12 to 0.7 Ma) and the Mid-Brunhes Event (MBE, similar to 400 ka) reflecting the development of perennial sea ice during interglacial periods and large ice shelves during glacial periods over the last 400,000 years. Published by Elsevier B.V.
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