Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Subpolar Link to the Emergence of the Modern Equatorial Pacific Cold Tongue
Ist Teil von
Science (American Association for the Advancement of Science), 2010-06, Vol.328 (5985), p.1550-1553
Ort / Verlag
Washington, DC: American Association for the Advancement of Science
Erscheinungsjahr
2010
Link zum Volltext
Quelle
American Association for the Advancement of Science
Beschreibungen/Notizen
The cold upwelling "tongue" of the eastern equatorial Pacific is a central energetic feature of the ocean, dominating both the mean state and temporal variability of climate in the tropics and beyond. Recent evidence for the development of the modern cold tongue during the Pliocene-Pleistocene transition has been explained as the result of extratropical cooling that drove a shoaling of the thermocline. We have found that the sub-Antarctic and sub-Arctic regions underwent substantial cooling nearly synchronous to the cold tongue development, thereby providing support for this hypothesis. In addition, we show that sub-Antarctic climate changed in its response to Earth's orbital variations, from a subtropical to a subpolar pattern, as expected if cooling shrank the warm-water sphere of the ocean and thus contracted the subtropical gyres.