Personnel at IGV
Yamoah, Afrifa Kweku Kyei
PhD student
Email: kweku.yamoah[at]geo.su.se
Phone: +46 (0)8 674 78 32
Room: R313
About Me

The title of my project is: Reconstruction of the South-East Asian hydro-climate using biomarkers and their hydrogen isotopic composition: method development and application.
The focus of the project is the development and application of hydrogen isotope analysis on molecular fossils as a quantitative paleo-hydrological tool. The primary goal is reconstruction of the Monsoon system of SE Asia. Molecular fossils are lipids from plants, algae and microorganisms that get deposited in lake and ocean sediments. The hydrogen isotopic composition of the lipids reflects that of their source water, which in its turn is influenced by local hydrology. Most work entails the isolation of the molecular fossils from lake sediments from Thailand, and subsequent analysis by gas chromatography - isotope ratio mass spectrometry. Thailand lies at a location sensitive to decadal-centennial scale latitudinal shifts of the inter-tropical convergence zone and monsoon variability, and also at the edge of the direct influence of the El Niño-Southern Oscillation. Sediment core material was recovered between 2009 and 2011 by Prof. B. Wohlfarth and coworkers. New sediments and auxiliary samples from the local vegetation and aquatic organisms will be recovered in December 2012. The project is led by Rienk Smittenberg.

Department of Geological Sciences
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