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Lake Korttajarvi, Central Finland
Reference
Tiljander, M., Saarnisto, M., Ojala, A.E.K. and Saarinen, T.  2003.  A 3000-year palaeoenvironmental record from annually laminated sediment of Lake Korttajarvi, central Finland.  Boreas 26: 566-577.

Description
Winter temperatures were inferred from analyses of varve thickness, relative X-ray density, pollen and diatom profiles and organic matter loss-on-ignition data obtained from annually-laminated sediments of Lake Korttajarvi (6220'N, 2541'E) in central Finland.  The Medieval Warm Period occurred between AD 980 and 1250 and was as much as 2C warmer than the Current Warm Period.