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SSF-Svalbard Science Forum

High resolution Holocene climate and paleoenvironmental reconstruction from Adventdalen, Svalbard based on OSL dating of loess.

Tildelt: kr 5 101

A Holocene sediment package, consisting of periglacial windblown sediment (Loess) is located in Adventdalen on Svalbard. The purpose of the project is to extract cores from 2-4 localities in Adventdalen and use Optically Stimulated Luminescence (OSL) dating to date the samples. Loess can generally be regarded as a very accurate climate indicator and together with OSL dating can present a very accurate image of the climate at a specific time. The loess of Adventdalen is located both in the active layer and in the permafrost and a detailed analysis of the permafrost and cryo-stratigraphy will therefore be an important part of the project. 2-4 cores will be extracted from different localities in the valley to be used in comparison. The cores will be 4-5 m. long, and 5 cm. in diameter. From these cores hundreds of samples will be extracted and transported to the Nordic Laboratory for Luminescence Dating(NLL) located in Risø, DK, where OSL dating will take place. Aeolian sediment, loess included, is widely regarded as very easy to date as very few factors disturb the signal from the sediment. OSL dating of loess has previously been performed with great success in Asia, Russia and Central Europe. OSL dating of loess on Svalbard has only been done to a limited extent. The project will expand on this and presents a unique opportunity to date and analyse a large sample group.

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SSF-Svalbard Science Forum