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Holocene climatic change reconstructed from diatoms, chironomids, pollen and near-infrared spectroscopy at an alpine lake (Sjuodjijaure) in northern Sweden

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dc.contributor.author Rosén, Peter
dc.contributor.author Segerström, Ulf
dc.contributor.author Eriksson, Lars
dc.contributor.author Renberg, Ingemar
dc.contributor.author Birks, Harry John Betteley
dc.date.accessioned 2007-12-14T11:52:25Z
dc.date.available 2007-12-14T11:52:25Z
dc.date.issued 2001
dc.identifier.citation The Holocene 2001 11(5): 551-562 en
dc.identifier.issn 0959-6836
dc.identifier.uri http://dx.doi.org/10.1191/095968301680223503
dc.identifier.uri http://hdl.handle.net/1956/2504
dc.description.abstract The results of a multiproxy study reconstructing the climate history of the last 9300 years in northern Sweden are presented. It is based on diatom, chironomid and pollen analyses, as well as near-infrared spec troscopy (NIRS), of a radiocarbon dated sediment core from Sjuodjijaure (67°22N, 18°04E), situated 100 m above tree-line in the Scandes mountains. Mean July air temperature was reconstructed using transfer functions established for the region. The biological proxies show significant changes in composition during the Holocene and the inferred temperatures all follow the same general trend. For the period between about 9300 to 7300 cal. BP the reconstructions should be interpreted with caution due to the lack of convincing modern analogues in the training set. However the reconstruction suggest that July temperature was on average about the same as today, with several rapid short-term cold and warm periods. Cold periods were dated to about 8500, 8200 and 7600 cal. years BP and a warm period to about 7700 cal. BP. About 7300 cal. BP, a major shift to a warmer climate occurred. Pine migrated into the area, which was previously covered with birch forest. From the mid-Holocene until today the sediment record suggests a descending tree-limit and a gradual lowering of July temperature. en
dc.language.iso eng en
dc.publisher SAGE en
dc.subject Holocene climate en
dc.subject Lake sediments en
dc.subject Northern Sweden en
dc.subject Pollen en
dc.subject Chironomids en
dc.subject Diatoms en
dc.subject Near-infrared spectroscopy en
dc.title Holocene climatic change reconstructed from diatoms, chironomids, pollen and near-infrared spectroscopy at an alpine lake (Sjuodjijaure) in northern Sweden en
dc.type Peer reviewed en
dc.type Journal article en
dc.subject.nsi VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 no


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