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Plant macrofossil evidence for an early onset of the Holocene summer thermal maximum in northernmost Europe.

Väliranta, M ; Salonen, J S ; Heikkilä, M ; Amon, L ; Helmens, K ; Klimaschewski, A ; Kuhry, P ; Kultti, S ; Poska, Anneli LU and Shala, S , et al. (2015) In Nature Communications 6.
Abstract
Holocene summer temperature reconstructions from northern Europe based on sedimentary pollen records suggest an onset of peak summer warmth around 9,000 years ago. However, pollen-based temperature reconstructions are largely driven by changes in the proportions of tree taxa, and thus the early-Holocene warming signal may be delayed due to the geographical disequilibrium between climate and tree populations. Here we show that quantitative summer-temperature estimates in northern Europe based on macrofossils of aquatic plants are in many cases ca. 2 °C warmer in the early Holocene (11,700-7,500 years ago) than reconstructions based on pollen data. When the lag in potential tree establishment becomes imperceptible in the mid-Holocene (7,500... (More)
Holocene summer temperature reconstructions from northern Europe based on sedimentary pollen records suggest an onset of peak summer warmth around 9,000 years ago. However, pollen-based temperature reconstructions are largely driven by changes in the proportions of tree taxa, and thus the early-Holocene warming signal may be delayed due to the geographical disequilibrium between climate and tree populations. Here we show that quantitative summer-temperature estimates in northern Europe based on macrofossils of aquatic plants are in many cases ca. 2 °C warmer in the early Holocene (11,700-7,500 years ago) than reconstructions based on pollen data. When the lag in potential tree establishment becomes imperceptible in the mid-Holocene (7,500 years ago), the reconstructed temperatures converge at all study sites. We demonstrate that aquatic plant macrofossil records can provide additional and informative insights into early-Holocene temperature evolution in northernmost Europe and suggest further validation of early post-glacial climate development based on multi-proxy data syntheses. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nature Communications
volume
6
article number
6809
publisher
Nature Publishing Group
external identifiers
  • pmid:25858780
  • wos:000353702500049
  • scopus:84927588905
  • pmid:25858780
ISSN
2041-1723
DOI
10.1038/ncomms7809
language
English
LU publication?
yes
id
10bb195a-4d30-4f0e-a6ae-198c79e6f95e (old id 5345020)
date added to LUP
2016-04-01 13:21:21
date last changed
2020-08-19 04:00:05
@article{10bb195a-4d30-4f0e-a6ae-198c79e6f95e,
  abstract     = {Holocene summer temperature reconstructions from northern Europe based on sedimentary pollen records suggest an onset of peak summer warmth around 9,000 years ago. However, pollen-based temperature reconstructions are largely driven by changes in the proportions of tree taxa, and thus the early-Holocene warming signal may be delayed due to the geographical disequilibrium between climate and tree populations. Here we show that quantitative summer-temperature estimates in northern Europe based on macrofossils of aquatic plants are in many cases ca. 2 °C warmer in the early Holocene (11,700-7,500 years ago) than reconstructions based on pollen data. When the lag in potential tree establishment becomes imperceptible in the mid-Holocene (7,500 years ago), the reconstructed temperatures converge at all study sites. We demonstrate that aquatic plant macrofossil records can provide additional and informative insights into early-Holocene temperature evolution in northernmost Europe and suggest further validation of early post-glacial climate development based on multi-proxy data syntheses.},
  author       = {Väliranta, M and Salonen, J S and Heikkilä, M and Amon, L and Helmens, K and Klimaschewski, A and Kuhry, P and Kultti, S and Poska, Anneli and Shala, S and Veski, S and Birks, H H},
  issn         = {2041-1723},
  language     = {eng},
  publisher    = {Nature Publishing Group},
  series       = {Nature Communications},
  title        = {Plant macrofossil evidence for an early onset of the Holocene summer thermal maximum in northernmost Europe.},
  url          = {http://dx.doi.org/10.1038/ncomms7809},
  doi          = {10.1038/ncomms7809},
  volume       = {6},
  year         = {2015},
}