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A shift towards wetter and windier conditions in southern Sweden around the prominent solar minimum 2750 cal a BP

Author:
  • Anette Mellström
  • Nathalie Van der Putten
  • Raimund Muscheler
  • Rixt De Jong
  • Svante Björck
Publishing year: 2015
Language: English
Pages: 235-244
Publication/Series: Journal of Quaternary Science
Volume: 30
Issue: 3
Document type: Journal article
Publisher: John Wiley & Sons

Abstract english

A variety of palaeoclimatic records show a shift towards cooler, wetter and windier conditions in Europe around 2800 cal a BP. The shift broadly coincides with an increase of the atmospheric C-14 concentration, suggesting a connection between solar activity variations and climate change. Here we investigate a peat record from Undarsmosse in southern Sweden. In a previous study, based on a low-resolution chronology, this record showed increased aeolian sand influx and Sphagnum spore content around 2800 cal a BP, indicating high storm activity and wetter conditions. We applied the C-14 wiggle-match dating technique on the same record to construct a robust chronology to evaluate the temporal relationship to solar forcing. In addition, we performed plant macrofossil analysis to determine local vegetation changes. Based on the new chronology, a shift to a Sphagnum-dominated bog, representing wetter conditions, and the onset of a period with increased storminess occurred around 2700 cal a BP. These changes are, within age model uncertainties, synchronous with climatic changes inferred from other sites in Europe, suggesting a shift in the larger scale atmospheric circulation, possibly triggered by decreased solar activity.

Keywords

  • Geology
  • C-14 wiggle-match dating
  • 2800 cal a BP
  • climate change
  • solar activity
  • southern Sweden

Other

Published
  • ISSN: 1099-1417
Raimund Muscheler
E-mail: raimund.muscheler [at] geol.lu.se

Professor

Quaternary Sciences

+46 46 222 04 54

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