Karl-Dag Vorren (e-mail: firstname.lastname@example.org), Department of Arctic and Marine Biology, University of Tromsø, NO-9037 Tromsø, Norway; Christin Eldegard Jensen (e-mail: email@example.com), Museum of Archaeology, University of Stavanger, NO-4036 Stavanger, Norway; Eilif Nilssen (e-mail: firstname.lastname@example.org), Faculty of Health Sciences, University of Tromsø, N-9037 Tromsø, Norway
Climate changes during the last c. 7500 years as recorded by the degree of peat humification in the Lofoten region, Norway
Article first published online: 22 JUL 2011
© 2011 The Authors. Boreas © 2011 The Boreas Collegium
Volume 41, Issue 1, pages 13–30, January 2012
How to Cite
VORREN, K.-D., JENSEN, C. E. and NILSSEN, E. (2012), Climate changes during the last c. 7500 years as recorded by the degree of peat humification in the Lofoten region, Norway. Boreas, 41: 13–30. doi: 10.1111/j.1502-3885.2011.00220.x
- Issue published online: 15 DEC 2011
- Article first published online: 22 JUL 2011
- received 21st February 2011, accepted 8th May 2011.
Vorren, K.-D., Jensen, C. E. & Nilssen, E. 2012 (January): Climate changes during the last c. 7500 years as recorded by the degree of peat humification in the Lofoten region, Norway. Boreas, Vol. 41, pp. 13–30. 10.1111/j.1502-3885.2011.00220.x. ISSN 0300-9483.
Two peat cores from two neighbouring bogs in Lofoten, northern Norway were densely AMS dated and analysed for humification. The two cores have been influenced by human agricultural impact, especially c. 1600 cal. a BP, which may have affected the local hydrology of the bogs. From 7400 cal. a BP onwards, 19 distinct wet-shifts are recorded in the two cores. Eight or nine of these correspond chronologically to periods of low solar activity. This correlation is most convincing during the last 2000 years. Some wet-shifts are connected with a solar low-activity period during the Subboreal/Subatlantic transition, which in central Europe is dated at 2750–2565 cal. a BP. For Lofoten, the corresponding Subboreal/Subatlantic transition – or the wet-shift marking this transition – is dated at c. 2600 cal. a BP. Some wet-shifts occur just before or just after solar low-activity periods, but only four of the nineteen wet-shifts are clearly not temporally connected with periods of low solar activity. Compared with the wet-shifts in NW European (mainly British Isles) bogs, there are more frequent wet-shifts in northern Norway. Compared with other peat cores in northern Norway, especially for the interval 6500–5000 cal. a BP, Lofoten deviates by its lack of wet-shifts. As in England, Scotland and Ireland, there is regional variability in the temporal formation of wet-shifts in northern Norway.