A coastal upwelling seesaw in the Atlantic Ocean as a result of the closure of the Central American Seaway
Article first published online: 3 SEP 2004
Copyright 2004 by the American Geophysical Union.
Geophysical Research Letters
Volume 31, Issue 17, September 2004
How to Cite
2004), A coastal upwelling seesaw in the Atlantic Ocean as a result of the closure of the Central American Seaway, Geophys. Res. Lett., 31, L17207, doi:10.1029/2004GL020073., and (
- Issue published online: 3 SEP 2004
- Article first published online: 3 SEP 2004
- Manuscript Accepted: 10 AUG 2004
- Manuscript Received: 24 MAR 2004
 Based on coupled climate model experiments, we suggest an antiphase relationship between the two major coastal upwelling zones in the Atlantic Ocean off northwestern and southwestern Africa. We describe this as an ‘upwelling seesaw’. The state of the coastal upwelling seesaw is controlled by variations in the oceanic meridional heat transfer between South and North Atlantic. In particular, we suggest that the Pliocene closure of the Central American Seaway induced a large-scale redistribution of heat in the Atlantic Ocean, leading to an intensification (weakening) of upwelling off southwest (northwest) Africa.