Changing atmospheric Δ14C and the record of deep water paleoventilation ages
Article first published online: 4 MAY 2010
Copyright 1997 by the American Geophysical Union.
Volume 12, Issue 3, pages 337–344, June 1997
How to Cite
1997), Changing atmospheric Δ14C and the record of deep water paleoventilation ages, Paleoceanography, 12(3), 337–344, doi:10.1029/97PA00379., and (
- Issue published online: 4 MAY 2010
- Article first published online: 4 MAY 2010
- Manuscript Accepted: 26 JAN 1997
- Manuscript Received: 19 SEP 1996
We propose a new calculation method to better estimate the deep water ventilation age from benthic-planktonic foraminifera 14C ages. Our study is motivated by the fact that changes in atmospheric Δ14C through time can cause contemporary benthic and planktonic foraminifera to have different initial Δ14C values. This effect can cause spurious ventilation age changes to be interpreted from the geologic data. Using a new calculation method, 14C projection ages, we recalculate the data from the Pacific Ocean. Contrary to previous results, we find that the Pacific intermediate and deep waters were about 600 years older than today at the last glacial maximum. In addition, there are possible signals of ventilation age change prior to ice sheet melting and at the Younger Dryas. However, the data are still too sparse to constrain these ventilation transients.