Karin F. Helmens (e-mail: firstname.lastname@example.org), Department of Physical Geography and Quaternary Geology, Stockholm University, SE-106 91 Stockholm, Sweden; Stefan Engels, Department of Physical Geography and Quaternary Geology, Stockholm University, SE-106 91 Stockholm, Sweden and Department of Biology, University of New Brunswick, Fredericton (NB), Canada E3B 6E1
Ice-free conditions in eastern Fennoscandia during early Marine Isotope Stage 3: lacustrine records
Article first published online: 11 FEB 2010
© 2010 The Authors, Journal compilation © 2010 The Boreas Collegium
Volume 39, Issue 2, pages 399–409, April 2010
How to Cite
HELMENS, K. F. and ENGELS, S. (2010), Ice-free conditions in eastern Fennoscandia during early Marine Isotope Stage 3: lacustrine records. Boreas, 39: 399–409. doi: 10.1111/j.1502-3885.2010.00142.x
- Issue published online: 25 FEB 2010
- Article first published online: 11 FEB 2010
- received 3rd February 2009, accepted 11th December 2009.
Helmens, K. F. & Engels, S. 2010: Ice-free conditions in eastern Fennoscandia during early Marine Isotope Stage 3: lacustrine records. Boreas, 10.1111/j.1502-3885.2010.00142.x. ISSN 0300-9483.
The traditional notion that Fennoscandia was glaciated throughout Marine Isotope Stages (MIS) 4–2, from c. 70 kyr BP to the deglaciation 15–10 kyr BP ago, has been challenged during the last decade. Recent studies have shown that climate and environmental settings during MIS 3 were more dynamic than previously assumed, and lacustrine sediment bodies indicate open-water conditions for several sites in eastern Fennoscandia. In this study, three sediment sequences from western, eastern and northeast Finland are compared in detail with respect to their chronology, vegetation reconstruction and climatic inferences. OSL-dating places the sediments in early MIS 3. Pollen evidence suggests the presence of isolated birch trees and open birch forest close to the retreating ice margin, in contrast to vegetation reconstructions from central Europe, which indicate tree-less vegetation. Furthermore, reconstructions of climate using transfer functions have yielded surprising results, indicating present-day summer temperatures in northeast Finland. The combined results suggest ice-free and warm conditions in major parts of eastern Fennoscandia in early MIS 3, possibly during Greenland Interstadial (GIS) 14 around 53 kyr BP ago.