Tuesday, December 13, 2011

Rutgers seminar today

IMCS Seminar

Presenter Dr. Gema Martinez Mendez MARUM – Zentrum für Marine Umweltwissenschaften, Universität Bremen

Title:  Paleorecords from the "Warm Water Route" of the Global Ocean Circulation and Perspectives into the "Cold Water Route"

Tuesday, December 13th, 2011 11:00 AM Alampi Room 71 Dudley Road Cook Campus

The Atlantic Ocean exports waters at depth to the rest of the ocean basins. This water lost should be compensated by an entering of waters at other isopycnal levels. There are two main routes of reentering of waters into the Atlantic Basin, the so called “Cold Water” and “Warm Water” routes. The names respond to the characteristics of the waters that are transferred. The “Cold Water Route” is formed by the entering of cold, fresh waters from the Pacific to the Atlantic through the Drake Passage while the “Warm Water Route” transfers warm, saline surface and upper thermocline waters from the Indian into the Atlantic by virtue of Agulhas Rings and Filaments (e.g. Gordon, 2003). Gordon et al. (1992) suggested that the shedding of Agulhas Rings and Filaments causes a salinity anomaly in the South Atlantic thermocline that is of significance for the mode and vigor of North Atlantic Deep Water (NADW) formation in the high latitudes of the North Atlantic. Hence this Indian-Atlantic connection plays a significant role in global climate. In this talk I will first present surface and deep paleorecords generated from two sediment cores located in the gateway between the Indian and Atlantic Ocean that allow inferences about changes in the “Warm Water Route” through the last 345 ka. The study of these records has stimulated further questions about the Global Ocean Circulation and the importance of the different compensation routes of NADW export and I will subsequently also guide you through the exciting field of investigation of the “Cold Water Route”.

No comments: