Signal and variability within a Holocene peat bog: chronological uncertainties of pollen, macrofossil and fungal proxies

M. Blaauw, D. Mauquoy

Research output: Contribution to journalSpecial issue

19 Citations (Scopus)

Abstract

A single raised bog from the eastern Netherlands has been repeatedly analysed and 14C dated over the past few decades. Here we assess the within-site variability of fossil proxy data through comparing the regional pollen, macrofossils and non-pollen palynomorphs of four of these profiles. High-resolution chronologies were obtained using 14C dating and Bayesian age-depth modelling. Where chronologies of profiles overlap, proxy curves are compared between the profiles using greyscale graphs that visualise chronological uncertainties. Even at this small spatial scale, there is considerable variability of the fossil proxy curves. Implications regarding signal (climate) and noise (internal dynamics) of the different types of fossil proxies are discussed. Single cores are of limited value for reconstructing centennial-scale climate change, and only by combining multiple cores and proxies can we obtain a reliable understanding of past environmental change and possible forcing factors (e.g., solar variability).
Original languageEnglish
Pages (from-to)5-15
Number of pages11
JournalReview of Palaeobotany and Palynology
Volume186
Issue number-
DOIs
Publication statusPublished - 15 Oct 2012

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peatlands
peatland
pollen
uncertainty
fossils
Holocene
fossil
chronology
raised bog
climate signal
bogs
Netherlands
environmental change
climate change
climate
modeling

Keywords

  • radiocarbon chronologies
  • fossil proxy signal and noise
  • raised bog peat deposits

Cite this

Signal and variability within a Holocene peat bog : chronological uncertainties of pollen, macrofossil and fungal proxies. / Blaauw, M.; Mauquoy, D.

In: Review of Palaeobotany and Palynology, Vol. 186, No. -, 15.10.2012, p. 5-15.

Research output: Contribution to journalSpecial issue

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abstract = "A single raised bog from the eastern Netherlands has been repeatedly analysed and 14C dated over the past few decades. Here we assess the within-site variability of fossil proxy data through comparing the regional pollen, macrofossils and non-pollen palynomorphs of four of these profiles. High-resolution chronologies were obtained using 14C dating and Bayesian age-depth modelling. Where chronologies of profiles overlap, proxy curves are compared between the profiles using greyscale graphs that visualise chronological uncertainties. Even at this small spatial scale, there is considerable variability of the fossil proxy curves. Implications regarding signal (climate) and noise (internal dynamics) of the different types of fossil proxies are discussed. Single cores are of limited value for reconstructing centennial-scale climate change, and only by combining multiple cores and proxies can we obtain a reliable understanding of past environmental change and possible forcing factors (e.g., solar variability).",
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