309712 20240928181522.0 G:(GEPRIS)42266882 G:(GEPRIS)42266882 42266882 GEPRIS http://gepris.its.kfa-juelich.de Holocene climate dynamics and biogeochemical cycles in the Mediterranean Sea (HOBIMED) 2007 - 2014 Professor Dr. Gerhard Schmiedl DFG project G:(GEPRIS)42266882 d 2007 - 2014 Deutsche Forschungsgemeinschaft I:(DE-588b)2007744-0 DFG G:(GEPRIS)25575884 SPP 1266: Integrierte Analyse zwischeneiszeitlicher Klimadynamik (Interdynamik) t We propose to study the mechanisms leading from deglacial and Holocene climate change to changed biogeochemical cycling in the Mediterranean Sea. We concentrate on this basin because it is a semi-enclosed ocean basin with very large amplitude reactions in the physical circulation regime to variations in the hydrological balance. The past variability of biogeochemical processes and marine ecosystems of this ocean is documented in the form of organic-rich sapropels that occurred at northern hemisphere insolation maxima. In order to understand the sensitivity of the Mediterranean Sea to high- and low-latitude climate forcing and to gauge the range of response to expected global change, we will model the Mediterranean Sea at times of the last deglaciation and climate extremes in the Holocene, including the transition into sapropel S1, the interruption of sapropel formation around 8.2 kyr BP, and reventilation during the Holocene Climate Optimum. Our Dual+ concept will be realized by the validation of global and regional Earth system model experiments with available and new proxy data from the eastern Mediterranean Sea. The aim of these experiments is to understand and quantify the relative role of the different forcing mechanisms and time scales involved in generating a state with stagnant and anoxic deepwater in the eastern Mediterranean Sea. oai:juser.fz-juelich.de:976587 authority:GRANT authority G AUTHORITY oai:juser.fz-juelich.de:976587