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Late-Holocene temperature and precipitation changes in Vindelfjallen, mid-western Swedish Lapland, inferred from chironomid and geochemical data
Responsible organisation
2014 (English)In: The Holocene, ISSN 0959-6836, E-ISSN 1477-0911, Vol. 24Article in journal (Refereed) Published
Abstract [en]

In this article, we present results from a palaeolimnological study from Lake Vuoksjavratje in the mountain tundra region in the Vindelfjallen Mountains, northwest Sweden. We suggest that the influence of precipitation may be one of the factors causing discrepancies between chironomid-based late-Holocene July temperature (JulyT) reconstructions from Fennoscandia. We combine quantitative temperature reconstruction using chironomids for the last 5100 years with qualitative analysis of chironomid composition and geochemical analyses, such as x-ray fluorescence (XRF), total organic carbon (TOC) and C/N analysis. The studied sequence is dated by Pb-210, Cs-137 and 11 C-14 datings from terrestrial macrofossils. The aim of the study was to use chironomids to reconstruct late-Holocene summer temperature variation on a multi-centennial to centennial timescale and to use geochemical data to identify periods during which the changes in chironomid composition might have been forced by environmental variables other than temperature, such as within lake processes or precipitation. Based on ordination techniques, and a comparison between chironomid-inferred JulyTs and changes in minerogenic sedimentation with regional temperature and wetness records, it is concluded that the JulyT signal was modulated by precipitation. The proxies indicate that both JulyT and annual precipitation have influenced the chironomid communities in Lake Vuoksjavratje, and that catchment-related processes caused by enhanced precipitation have overridden the summer temperature signal between 3000 and 2200 cal. yr BP, and between 1050 and 100 cal. yr BP.

Place, publisher, year, edition, pages
2014. Vol. 24
Keyword [en]
chironomids late Holocene northern Sweden precipitation temperature reconstruction x-ray fluorescence west-central sweden near-infrared spectroscopy july air-temperature northern sweden lake-sediments quantitative indicators environmental-changes scandes-mountains climate-change atmospheric circulation Physical Geography Geology
Research subject
SWEDARCTIC 2008, Arktiska Sverige
Identifiers
URN: urn:nbn:se:polar:diva-1887DOI: 10.1177/0959683613512167OAI: oai:DiVA.org:polar-1887DiVA: diva2:810838
Note

ISI Document Delivery No.: 277OK Times Cited: 1 Cited Reference Count: 108 Berntsson, Annika Rosqvist, Gunhild C. Velle, Gaute Swedish Polar Research Secretariat (IPY/Arctic Sweden); Andreefonden (Svenska Sallskapet for Antropologi och Geografi); Goran Gustafssons stiftelse for forskning i Lappland; Mannerfeldts Fond for geografisk forskning; De Geers Stiftelse for kvartargeologisk forskning This work was supported by the Swedish Polar Research Secretariat (IPY/Arctic Sweden), Andreefonden (Svenska Sallskapet for Antropologi och Geografi), Goran Gustafssons stiftelse for forskning i Lappland, Mannerfeldts Fond for geografisk forskning and De Geers Stiftelse for kvartargeologisk forskning. 1 Sage publications ltd London Geography, Physical; Geosciences, Multidisciplinary

Available from: 2015-05-08 Created: 2015-05-06 Last updated: 2015-06-05Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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