09/18 Seminar Talk ----“Recent Developments in Geochemical Proxies based on Foraminifera”

2017-09-18

Time: 2017-9-18(Monday) 10:00-11:15
Speaker: Dr. Jeroen Groeneveld
Institution: Marum – Center for Marine Environmental Sciences and Faculty of Geosciences, University of Bremen, Bremen, Germany
Venue: C2-308, Xi Ping Bldg
Hosts: Stephan Steinke
Contact: Gu Huaping, ghp@xmu.edu.cn

Dr. Jeroen Groeneveld is a palaeoceanographer specializing in the use of trace metals in foraminifera as proxies to reconstruct past environmental changes. He works e.g. on understanding past changes in the Walker circulation over the Indian Ocean, Pliocene changes in climate and oceanography in the Atlantic, Caribbean and Pacific and the development and application of trace metal/ Ca proxies in benthic foraminifera in shallow marine/coastal environments. Dr. Groeneveld is author and co-author of over 60 articles in scientific journals such as Nature Communications, Paleoceanography and Quaternary Science Reviews.

Abstract:

Trace metal to calcium ratios in foraminifera are commonly used as proxies in paleoceanography to reconstruct a range of different water mass properties in the past. Well-known proxies as stable oxygen isotopes and Mg/Ca are routinely reconstructing paleo-temperatures and salinity. Ongoing development of analytical equipment and exploration of how the incorporation of metals into foraminiferal shells works, continuously leads to the appearance of new proxies. In this presentation I will give an overview of the latest developments in trace metal/Ca in foraminifera with particular focus on the emergence of redox-related proxies (e.g. Mn/Ca) and the application of d18O and Mg/Ca on single foraminifera to trace interannual variability.