Comparison of terrestrial and marine records of changing climate of the last 500,000 years

Details Comparison of terrestrial and marine records of changing climate of the last 500,000 years Comparison of terrestrial and marine records of changing climate of the last 500,000 years

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997e%26psl.150..171t&link_type=abstract

Earth and Planetary Science Letters, Volume 150, Issue 1-2, p. 171-176.

Computer Science

42

Scientific paper

A broad correspondence between long pollen sequences and the deep-sea oxygen isotope record has been noted for some time, but there has been little effort to explore just how similar the two types of evidence are in terms of their overall structure on glacial-interglacial timescales and also how they may differ. These questions have profound importance both for how we view the stratigraphic record of changing climate in different regions and for our understanding of the climate system. Here we link the four longest European pollen records and derive a terrestrial sequence of vegetation events and a coherent stratigraphic scheme for the last 500,000 years. Comparison of the terrestrial and marine records shows good agreement, but it also reveals that the pollen sequences contain a higher degree of climate sensitivity than the oxygen isotope record. In addition, it suggests that neither an oxygen isotope record nor a Milankovitch-forced ice volume model may provide an appropriate template for fine-tuning the terrestrial record and that better chronologies will depend on an improved understanding of controls on sedimentation rates in individual sedimentary basins.

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