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Shifts in precipitation during the last millennium in northern Scandinavia from lacustrine isotope records
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2013 (Engelska)Ingår i: Quaternary Science Reviews, ISSN 0277-3791, E-ISSN 1873-457X, Vol. 66, s. 22-34Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Here we present delta P-18(diatom) data from two high-latitude lakes; one has short residence time and a water isotopic composition (delta O-18(lake)) that fluctuate due to seasonal variations in precipitation and temperature, and the other has delta O-18(lake) that is influenced by longer lake water residence times and evaporation. The delta O-18(diatom) records reveal common responses to precipitation forcing over the past millennium. Relatively wet summers are inferred from delta O-18(diatom) between 1000 and 1080 AD, 1300 and 1440 AD, and during the early 19th century, coincided with periods of high cloud cover inferred from tree-ring carbon isotopes, and other data for high Arctic Oscillation index. While relatively dry summers with increasing influence of winter snow are indicated between 1600 and 1750 AD. The co-response between carbon isotopes in trees and oxygen isotopes in diatoms strengthens the relationship between cloud cover and precipitation and the hypothesis that these changes were the result of significant regional shifts in atmospheric circulation. (C) 2012 Elsevier Ltd. All rights reserved.

Ort, förlag, år, upplaga, sidor
2013. Vol. 66, s. 22-34
Nyckelord [en]
Last millennium, Lakes, Isotope, Diatoms, Scandinavian climate
Nationell ämneskategori
Naturgeografi
Identifikatorer
URN: urn:nbn:se:umu:diva-71089DOI: 10.1016/j.quascirev.2012.10.030ISI: 000317448500003OAI: oai:DiVA.org:umu-71089DiVA, id: diva2:629381
Tillgänglig från: 2013-06-17 Skapad: 2013-05-20 Senast uppdaterad: 2018-06-08Bibliografiskt granskad

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Bigler, ChristianDadal, Anna

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Bigler, ChristianDadal, Anna
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Institutionen för ekologi, miljö och geovetenskap
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Quaternary Science Reviews
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