Effect of vegetation on the Late Miocene ocean circulation
G. Lohmann1, M. Butzin2, A. Micheels3, T. Bickert3, and V. Mosbrugger31Alfred-Wegener-Institut für Polar- und Meeresforschung, Bussestr. 24, 27570 Bremerhaven, Germany 2University of Bremen, P.O. Box 330440, 28334 Bremen, Germany 3Senckenberg Research Institute and Natural History Museum, Senckenberganlage 25, 60325 Frankfurt am Main, Germany
Received: 04 Aug 2006 – Discussion started: 23 Aug 2006
Abstract. A weak and shallow thermohaline circulation in the North Atlantic Ocean is related to an open Central American gateway and exchange with fresh Pacific waters. We estimate the effect of vegetation on the ocean general circulation using the atmospheric circulation model simulations for the Late Miocene climate. Caused by an increase in net evaporation in the Miocene North Atlantic, the North Atlantic water becomes more saline which enhances the overturning circulation and thus the northward heat transport. This effect reveals a potentially important feedback between the ocean circulation, the hydrological cycle and the land surface cover for Cenozoic climate evolution.
Lohmann, G., Butzin, M., Micheels, A., Bickert, T., and Mosbrugger, V.: Effect of vegetation on the Late Miocene ocean circulation, Clim. Past Discuss., 2, 605-631, doi:10.5194/cpd-2-605-2006, 2006.