Joint Seminar: Modelling marine organic carbon cycling and its impact on global biogeochemistry and mass extinctions

This seminar will introduce some of my previous research interests to the MPI-M and CEN. My overarching research goal is to develop and apply mechanistic numerical models to advance our understanding of the environmental consequences of past, present and future climate change. In particular, I am interested in the role of organic carbon (Corg) transformations in the marine realm and its impact on global biogeochemical cycles and climate.

In the first part of my talk, I will introduce the novel, computationally efficient early diagenetic model OMEN-SED, which I developed during my PhD. OMEN-SED describes Corg degradation in the marine sediments and explicitly simulates associated dynamics of the most important terminal electron acceptors and reduced substances. I will show how OMEN-SED can help establish global budgets of Corg degradation pathways and fluxes of redox-sensitive elements. In the second part of my talk, I will briefly introduce an Earth system Model of Intermediate Complexity (EMIC) that I am using to understand Earth’s climate and biogeochemistry on geological time scales. I will jump ~252 Ma back in time to the end-Permian and illustrate how this EMIC, featuring a more mechanistic biological pump (incl. OMEN-SED), can help identify the biogeochemical kill mechanism responsible for the largest extinction in Earth’s history.




15:15–16:15 h


Bundesstr. 53, room 022/023
Seminar Room 022/023, Ground Floor, Bundesstrasse 53, 20146 Hamburg, Hamburg


Dominik Hülse


Bo Liu

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