A Quantitative holocene climatic record from diatoms in northern Fennoscandia

Jan Weckström, Atte Korhola, Lasse Holmström, Panu Erästö

Research output: Contribution to journalArticleScientificpeer-review


A diatom-based calibration model for predicting summer temperatures was developed using climatically sensitive subarctic lakes in northern Fennoscandia. The model was applied to a sediment core from a treeline lake to infer trends in Holocene climate. The record exhibits long-term variations, as well as a series of shorter-term fluctuations on a time scale of centuries. Summers were warmest in the area about 6200 cal yr B.P. and featured distinct cooling episodes around 8300, 7200, 4200, 3000, and 400 cal yr B.P., most of these coinciding with some known climate events (e.g., the 8200 cal yr B.P. event and the Little Ice Age). The similarity of the observed shifts with the pacings of climate events from marine and ice-core records represents evidence for coupled ocean–atmosphere forcing of the regional climate.
Original languageEnglish
Pages (from-to)284-294
Number of pages11
Issue number2
Publication statusPublished - 2000
MoE publication typeA1 Journal article-refereed


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