Late Cretaceous seasonal ocean variability from the Arctic

Andrew Davies, Alan E. S. Kemp () and Jennifer Pike
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Andrew Davies: National Oceanography Centre Southampton, School of Ocean and Earth Science, University of Southampton, Southampton, SO14 3ZH, UK
Alan E. S. Kemp: National Oceanography Centre Southampton, School of Ocean and Earth Science, University of Southampton, Southampton, SO14 3ZH, UK
Jennifer Pike: School of Earth and Ocean Sciences, Cardiff University, Main Building, Park Place, Cardiff, CF10 3YE, UK

Nature, 2009, vol. 460, issue 7252, 254-258

Abstract: Arctic Ocean climate records Palaeoclimate records for the Arctic Ocean and its environs in the late Cretaceous 'greenhouse' era, 65–99 million years ago, are sparse. Using electron microscope techniques applied to cores of shallow buried Cretaceous laminated sediments from the Alpha ridge of the Arctic Ocean, Davies et al. have obtained a seasonally resolved sediment record from the Cretaceous that permits a reconstruction of the annual cycle of marine productivity and flux to the sediment. They find that the period was characterized by seasonal diatom productivity in a stratified ocean with possible winter sea ice cover.

Date: 2009
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DOI: 10.1038/nature08141

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