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Raimund Muscheler

Raimund Muscheler

Professor

Raimund Muscheler

The Preboreal climate reversal and a subsequent solar-forced climate shift

Författare

  • J Van der Plicht
  • B Van Geel
  • SJP Bohncke
  • JAA Bos
  • M Blaauw
  • AOM Speranza
  • Raimund Muscheler
  • Svante Björck

Summary, in English

Accurate chronologies are essential for linking palaeoclimate archives. Carbon-14 wiggle-match dating was used to produce an accurate chronology for part of an early Holocene peat sequence from the Borchert (The Netherlands). Following the Younger Dryas-Preboreal transition, two climatic shifts could be inferred. Around 11 400 cal. yr BP the expansion of birch (Betula) forest was interrupted by a dry continental phase with dominantly open grassland vegetation, coeval with the PBO (Preboreal Oscillation), as observed in the GRIP ice core. At 11 250 cal. yr BP a sudden shift to a humid climate occurred. This second change appears to be contemporaneous with: (i) a sharp increase of atmospheric C-14; (ii) a temporary decline of atmospheric CO2; and (iii) an increase in the GRIP Be-10 flux. The close correspondence with excursions of cosmogenic nuclides points to a decline in solar activity, which may have forced the changes in climate and vegetation at around 11 250 cal. yr BP. Copyright (C) 2004 John Wiley Sons, Ltd.

Avdelning/ar

  • Kvartärgeologi

Publiceringsår

2004

Språk

Engelska

Sidor

263-269

Publikation/Tidskrift/Serie

Journal of Quaternary Science

Volym

19

Issue

3

Dokumenttyp

Artikel i tidskrift

Förlag

John Wiley and Sons

Ämne

  • Geology

Nyckelord

  • wiggle-match dating
  • peat
  • climate change
  • Preboreal
  • solar forcing
  • C-14
  • Be-10
  • O-18

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1099-1417