HOLIVAR2006 Abstracts
Holocene summer temperature variability in southern Norway - a palaeolimnological study based on chironomids, pollen, and geochemical data.
Britta Lüder1, H. John B. Birks2 and Bernd Zolitschka1
1GEOPOLAR, Institute of Geography, University of Bremen, Celsiusstr. FVG-M, D-28359 Bremen, Germany
2Department of Biology, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
Contact: Britta Lüder (blueder@uni-bremen.de)
Palaeolimnological investigations focussing on quantitative reconstructions of changes in Holocene summer temperatures have been carried out at two non-alpine lakes in southern Norway. Changes in the lakes' sedimentation processes have been reconstructed using geochemical methods and Holocene summer temperatures have been reconstructed from chironomids and pollen. Though discrepancies between the two different temperature reconstructions occur during short periods in the Holocene, the overall picture shows a close agreement between the chironomid- and the pollen-based reconstructions. Reasons for the similarities and differences are discussed together with the question whether sediments from non-alpine lakes are suitable for quantitative, chironomid-based reconstructions of Holocene summer temperatures.
Britta Lüder is a scientific assistant at GEOPOLAR, Institute of Geography, University of Bremen. She is about to finish her PhD, working on quantitative climate reconstructions based on chironomid analyses of Holocene lake sediments from Setesdal (southern Norway). Her main research interests are focussed on palaeoenvironmental reconstructions using lake sediments, including interests in sediment chronology, sedimentation processes, geochemistry, subfossil chironomids, and quantitative climate reconstructions.