Per-Olov Persson: Nd isotopes in the Polar Oceans
The primary aim of this PhD thesis is to use long-lived radioisotopes, i.e. Neodymium (Nd) which belongs to the Rare Earth Element (REE) group, as a tracer for shelf interaction and source apportionment. It has been suggested that Nd isotopic signatures and concentrations are modified by seawater ocean margins interaction, a process termed “boundary exchange". This is likely to be an important factor controlling the isotopic composition in the marine environment. In parallel with determination of Nd isotopic composition of river and shelf water, leaching experiments will be conducted on particles in the water and surface sediments from the Siberian Shelf. These experiments will be used to investigate whether the river borne Nd isotope signal is being modified during off shelf transport.
The project is planned to include the following papers. 1: Isotopic analysis of Nd in seawater using a chelating resin preconcentration method. 2: The inflow of Nd from the large Siberian Russian rivers and its importance for the Nd isotopic composition of theArctic Ocean . 3: Exchange fluxes of Nd isotopes in the SiberianShelf-ArcticOcean interface. 4: Isotopic determination of key micronutrient sources and particle fluxes in the Amundsen Sea,Antarctica
Print page