The Cenozoic palaeo environment of the Arctic Ocean
Article Abstract:
A Cenozoic palaeoceanographic record constructed from >400 m of sediment core from a recent drilling expedition to the Lomonosov ridge in the Arctic Ocean is reported. Evidence is found for the first occurrence of ice-rafted debris in the middle Eocene epoch, the temperatures of surface waters during the Palaeocene/Eocene thermal maximum have appeared to be substantially warmer than previously estimated and the revised timing of the earliest Arctic cooling events coincides with those from Antarctica.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2006
User Contributions:
Comment about this article or add new information about this topic:
Rapid stepwise onset of Antarctic glaciation and deeper calcite compensation in the Pacific Ocean
Article Abstract:
The ocean sediment records of calcium carbonate content as well as carbon and oxygen isotopic compositions from the tropical Pacific Ocean that covers the Eocene/Oligocene boundary is presented. It is found that the deepening of the calcite compensation depth was more rapid than previously documented and occurred in two jumps of about 40,000 years each, synchronous with the stepwise onset of Antarctic ice-sheet growth.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2005
User Contributions:
Comment about this article or add new information about this topic:
No extreme bipolar glaciation during the main Eocene calcite compensation shift
Article Abstract:
The hypothesis that the large ice sheets were present in both hemispheres approximately 41.6 million years ago was tested. Results showed that the threshold for continental glaciation was crossed earlier in Southern Hemisphere than in Northern Hemisphere due to the different land-ICEat the two poles.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2007
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: The physical basis of how prion conformations determine strain phenotypes. Global landscape of protein complexes in the yeast Saccharomyces cerevisiae
- Abstracts: Eastern Pacific cooling and Atlantic overturning circulation during the last deglaciation. Cool stratification
- Abstracts: The stem-cell niche as an entity of action. Stem cell engraftment at the endosteal niche is specified by the calcium-sensing receptor
- Abstracts: Marine explorer; Randy Wells enters the world of dolphins. Not just another pretty face. The comeback crocodiles: The count is up in South Florida
- Abstracts: Mutual phase-locking of microwave spin torque nano-oscillators. Silver nanoswitch