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Spatial structure of the 8200 cal yr BP event in northern Europe

Seppa, H. ; Birks, H. J. B. ; Giesecke, T. ; Hammarlund, Dan LU ; Alenius, T. ; Antonsson, K. ; Bjune, A. E. ; Heikkila, M. ; MacDonald, G. M. and Ojala, A. E. K. , et al. (2007) In Climate of the Past 3(2). p.225-236
Abstract
A synthesis of well-dated high-resolution pollen records suggests a spatial structure in the 8200 cal yr BP event in northern Europe. The temperate, thermophilous tree taxa, especially Corylus, Ulmus, and Alnus, decline abruptly between 8300 and 8000 cal yr BP at most sites located south of 61 degrees N, whereas there is no clear change in pollen values at the sites located in the North-European tree-line region. Pollen-based quantitative temperature reconstructions and several other, independent palaeoclimate proxies, such as lacustrine oxygen-isotope records, reflect the same pattern, with no detectable cooling in the sub-arctic region. The observed patterns challenges the general view of the widespread occurrence of the 8200 cal yr BP... (More)
A synthesis of well-dated high-resolution pollen records suggests a spatial structure in the 8200 cal yr BP event in northern Europe. The temperate, thermophilous tree taxa, especially Corylus, Ulmus, and Alnus, decline abruptly between 8300 and 8000 cal yr BP at most sites located south of 61 degrees N, whereas there is no clear change in pollen values at the sites located in the North-European tree-line region. Pollen-based quantitative temperature reconstructions and several other, independent palaeoclimate proxies, such as lacustrine oxygen-isotope records, reflect the same pattern, with no detectable cooling in the sub-arctic region. The observed patterns challenges the general view of the widespread occurrence of the 8200 cal yr BP event in the North Atlantic region. An alternative explanation is that the cooling during the 8200 cal yr BP event took place mostly during the winter and spring, and the ecosystems in the south responded sensitively to the cooling during the onset of the growing season. In contrast, in the sub-arctic area, where the vegetation was still dormant and lakes ice-covered, the cold event is not reflected in pollen-based or lake-sediment-based records. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Climate of the Past
volume
3
issue
2
pages
225 - 236
publisher
Copernicus GmbH
external identifiers
  • wos:000247031400004
  • scopus:34249095370
ISSN
1814-9332
language
English
LU publication?
yes
id
88c89e9b-0f17-447e-afc4-941b44facb07 (old id 651128)
alternative location
http://www.clim-past.net/3/225/2007/
date added to LUP
2016-04-01 11:37:18
date last changed
2022-02-18 02:23:30
@article{88c89e9b-0f17-447e-afc4-941b44facb07,
  abstract     = {{A synthesis of well-dated high-resolution pollen records suggests a spatial structure in the 8200 cal yr BP event in northern Europe. The temperate, thermophilous tree taxa, especially Corylus, Ulmus, and Alnus, decline abruptly between 8300 and 8000 cal yr BP at most sites located south of 61 degrees N, whereas there is no clear change in pollen values at the sites located in the North-European tree-line region. Pollen-based quantitative temperature reconstructions and several other, independent palaeoclimate proxies, such as lacustrine oxygen-isotope records, reflect the same pattern, with no detectable cooling in the sub-arctic region. The observed patterns challenges the general view of the widespread occurrence of the 8200 cal yr BP event in the North Atlantic region. An alternative explanation is that the cooling during the 8200 cal yr BP event took place mostly during the winter and spring, and the ecosystems in the south responded sensitively to the cooling during the onset of the growing season. In contrast, in the sub-arctic area, where the vegetation was still dormant and lakes ice-covered, the cold event is not reflected in pollen-based or lake-sediment-based records.}},
  author       = {{Seppa, H. and Birks, H. J. B. and Giesecke, T. and Hammarlund, Dan and Alenius, T. and Antonsson, K. and Bjune, A. E. and Heikkila, M. and MacDonald, G. M. and Ojala, A. E. K. and Telford, R. J. and Veski, S.}},
  issn         = {{1814-9332}},
  language     = {{eng}},
  number       = {{2}},
  pages        = {{225--236}},
  publisher    = {{Copernicus GmbH}},
  series       = {{Climate of the Past}},
  title        = {{Spatial structure of the 8200 cal yr BP event in northern Europe}},
  url          = {{http://www.clim-past.net/3/225/2007/}},
  volume       = {{3}},
  year         = {{2007}},
}