Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmpp41b0548s&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #PP41B-0548
Astronomy and Astrophysics
Astronomy
4806 Carbon Cycling (0428), 4901 Abrupt/Rapid Climate Change (1605), 4910 Astronomical Forcing, 4930 Greenhouse Gases
Scientific paper
Atmospheric carbon dioxide concentrations predicted for 2100 may not have existed on Earth since the early part of the Eocene epoch when global conditions were much warmer and less glaciated than today. Yet our understanding of carbon cycling and climate stability within the Eocene is extremely rudimentary. Here we present the first high-resolution paleoceanographic records across the early to middle Eocene boundary. Our records reveal multiple prominent perturbations to Eocene climate and the carbon cycle. We also observe breakdown in the post-Eocene/Oligocene boundary spatial pattern of astronomical pacing of deep ocean sediment calcium carbonate content. We attribute this divergent response to astronomical forcing to the deglaciated early Eocene climate state.
Pälike Heiko
Sexton Philip F.
Wilson Paul Anthony
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