Ulrike Fallet

 

Ulrike Fallet	ROYAL NETHERLANDS INSTITUTE FOR SEA RESEARCH   Postal address: P.O. Box 59, NL-1790 AB Den Burg (Texel) The Netherlands   Visiting address: Landsdiep 4 NL-1797 SZ ’t Horntje (Texel) The Netherlands   Phone: (+31) (0)222-369300 Fax: (+31) (0)222-319674
E-mail @nioz.nl: ulrike.fallet Phone: (+31) (0)222-369448

 

General:

2005 – present: PhD student at the Royal NIOZ, Department of Marine Geology Study project at the University of Auckland, New Zealand (Topic: Silica sinters in hot spring deposits) 2001 – 2005: Scientific student assistant at the Department of Geosciences,  University of Jena (sedimentology and paleontology) 1999 – 2005: Student at the University of Jena, Germany (graduated in geology with specialization in sedimentology and paleontology) 1997 – 1999: Student of geology and anthropology at the University of  Wisconsin/Milwaukee, USA

Research Interests:

Sedimentology, paleoceanography and paleoclimatology Planktonic foraminifera and their application for specific proxies

Current Project:

Establishing seasonal temperature-salinity cycles in terms of the isotope and divalent cation ratios of benthic and planktonic foraminifera from the western Indian Ocean. The Mozambique Channel is at the origin of the greater Agulhas Current system and appears to play a significant role in the global thermo-haline circulation as a gateway for the through-flow of Indian Ocean, north Atlantic deep water and Antarctic water masses. In order to quantify current transport, monthly-resolved sediment trap fluxes from a suite of eight moorings are combined with in situ ADCP monitoring of Mozambique eddies. These are contrasted with Holocene bottom sediments accumulating across the channel floor. Our objective is to establish the seasonal temperature-salinity (T-S) cycle in terms of the isotope and divalent cation ratios of specific pelagic foraminifera as well as the T-S range of deep water masses reflected in benthic species. We aim at quantifying the relationship between specific T-S proxies and their seasonal export productivity in order to arrive at a mass balance for comparison with the sediment. A similar proxy approach will be taken for alkenone thermometry (Uk37, TEX86) as well as organic matter δD and δ15N. Results will be related to coral records from Mozambique Channel islands that also exhibit strong seasonal cycles in carbonate production. Together this allows for coupling of biogenic carbonate and organic carbon productivity with sedimentary transport and preservation on the channel floor for seasonal deconvolution of sedimentary records of modern and past ocean-climate history. Related projects: LOCO (Long term Ocean Climate Observation), NEBROC 2 (Netherlands Bremen Oceanography), Paleosalt, Sindocom Duration: 2005 – 2009 People involved: Jelle Bijma (AWI), Stefan Schouten (NIOZ), Marcel van der Meer (NIOZ), Geert-Jan Brummer (NIOZ), Jens Zinke (VU Amsterdam) Funding: NWO, NIOZ within NEBROC 2, Paleosalt