Testing the influence of the Central American Seaway on orbitally forced Northern Hemisphere glaciation
Article first published online: 1 FEB 2005
Copyright 2005 by the American Geophysical Union.
Geophysical Research Letters
Volume 32, Issue 3, February 2005
How to Cite
2005), Testing the influence of the Central American Seaway on orbitally forced Northern Hemisphere glaciation, Geophys. Res. Lett., 32, L03703, doi:10.1029/2004GL021564., , and (
- Issue published online: 1 FEB 2005
- Article first published online: 1 FEB 2005
- Manuscript Accepted: 8 DEC 2004
- Manuscript Revised: 17 NOV 2004
- Manuscript Received: 20 SEP 2004
 Utilizing a climate model of intermediate complexity, we test the hypothesis that the Pliocene closure of the Central American Seaway was a necessary precondition for orbitally triggered Northern Hemisphere glaciation. We conduct a series of sensitivity experiments in order to analyze the isolated and combined effects of Panama closure and orbital forcing on Northern Hemisphere perennial snow cover. While orbital forcing efficiently controls the extension of perennial snow cover, the model results suggest that the closure of the Central American Seaway did not intensify orbitally forced glaciation in high northern latitudes.