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Holocene lake-level changes in the Fennoscandian tree-line region, western Finnish Lapland: diatom and cladoceran evidence
Hannu Hyvärinen
Department of Geology, Division of Geology and Palaeontology, University of Helsinki, PO Box 11 (Snellmaninkatu 3), 00014 University of Helsinki, Finland
Pentti Alhonen
Department of Geology, Division of Geology and Palaeontology, University of Helsinki, PO Box 11 (Snellmaninkatu 3), 00014 University of Helsinki, Finland
Lithostratigraphical, diatom and cladoceran evidence were used to demonstrate Holocene lake-level changes in two closed-basin lakes in western Finnish Lapland, north of the coniferous tree- line. The lake levels were significantly lower than present in early to mid-Holocene times, from about 8000 until about 4000BP, after which they rose to the present level. The changes are believed to be climatically controlled and regionally representative. The proposed mid-Holocene dryness in Lapland contrasts with the evidence from southern Sweden and Finland, where past lake levels indicate humid conditions during much of the mid-Holocene (Atlantic) time.
Key Words: Lake levels • palaeohydrology • climatic change • diatoms • Cladocera • Holocene • northern Europe • North Fennoscandia • Finland • Lapland.
The Holocene, Vol. 4, No. 3,
251-258 (1994)
DOI: 10.1177/095968369400400304
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