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Holocene climate changes in southern Greenland: evidence from lake sediments

Andresen, Camilla Snowman LU ; Björck, Svante LU ; Bennike, O and Bond, G (2004) In Journal of Quaternary Science 19(8). p.783-795
Abstract
A Holocene lake sediment record is presented from Lake N14 situated on Angissoq island 15 km off the main coast of southern Greenland. The palaeoclimatic development has been interpreted on the basis of flux and percentage content of biogenic silica, clastic material, organic material and sulphur as well as sedimentation rate, moss content and magnetic susceptibility. A total of 43 radiocarbon dates has ensured a reliable chronology. It is argued that varying sediment composition mainly reflects changing precipitation. By analogy with the present meteorological conditions in southern Greenland, Holocene climate development is inferred. Between 11550 and 9300 cal. yr BP temperature and precipitation increase markedly, but this period is... (More)
A Holocene lake sediment record is presented from Lake N14 situated on Angissoq island 15 km off the main coast of southern Greenland. The palaeoclimatic development has been interpreted on the basis of flux and percentage content of biogenic silica, clastic material, organic material and sulphur as well as sedimentation rate, moss content and magnetic susceptibility. A total of 43 radiocarbon dates has ensured a reliable chronology. It is argued that varying sediment composition mainly reflects changing precipitation. By analogy with the present meteorological conditions in southern Greenland, Holocene climate development is inferred. Between 11550 and 9300 cal. yr BP temperature and precipitation increase markedly, but this period is climatically unstable. From 9300 yr BP conditions become more stable and a Holocene climatic optimum, characterised by warm and humid conditions, is observed from 8000 to 5000 cal. yr BP. From 4700 cal. yr BP the first signs of a climatic deterioration are observed, and from 3700 cal. yr BP the climate has become more dry and cold. Superimposed on the climatic long-term trend is climate variability on a centennial time-scale that increases in amplitude after 3700 cal. yr BP. A climatic scenario related to the strength and position of the Greenland high-pressure cell and the Iceland low-pressure cell is proposed to explain the Holocene centennial climate variability. A comparison of the Lake N14 record with a terrestrial as well as a marine record from the eastern North Atlantic Ocean suggests that the centennial climate variability was uniform over large areas at certain times. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
biogenic silica, centennial and millennial variability, paleolimnology, paleoclimate, mosses, Neoglaciation, Holocene, southern Greenland
in
Journal of Quaternary Science
volume
19
issue
8
pages
783 - 795
publisher
John Wiley & Sons
external identifiers
  • wos:000225442200005
  • scopus:10944247800
ISSN
1099-1417
DOI
10.1002/jqs.886
language
English
LU publication?
yes
id
2bb0c678-49d7-4065-8f96-2f3a3944e04b (old id 259559)
date added to LUP
2007-10-16 13:15:01
date last changed
2017-02-12 04:07:47
@article{2bb0c678-49d7-4065-8f96-2f3a3944e04b,
  abstract     = {A Holocene lake sediment record is presented from Lake N14 situated on Angissoq island 15 km off the main coast of southern Greenland. The palaeoclimatic development has been interpreted on the basis of flux and percentage content of biogenic silica, clastic material, organic material and sulphur as well as sedimentation rate, moss content and magnetic susceptibility. A total of 43 radiocarbon dates has ensured a reliable chronology. It is argued that varying sediment composition mainly reflects changing precipitation. By analogy with the present meteorological conditions in southern Greenland, Holocene climate development is inferred. Between 11550 and 9300 cal. yr BP temperature and precipitation increase markedly, but this period is climatically unstable. From 9300 yr BP conditions become more stable and a Holocene climatic optimum, characterised by warm and humid conditions, is observed from 8000 to 5000 cal. yr BP. From 4700 cal. yr BP the first signs of a climatic deterioration are observed, and from 3700 cal. yr BP the climate has become more dry and cold. Superimposed on the climatic long-term trend is climate variability on a centennial time-scale that increases in amplitude after 3700 cal. yr BP. A climatic scenario related to the strength and position of the Greenland high-pressure cell and the Iceland low-pressure cell is proposed to explain the Holocene centennial climate variability. A comparison of the Lake N14 record with a terrestrial as well as a marine record from the eastern North Atlantic Ocean suggests that the centennial climate variability was uniform over large areas at certain times.},
  author       = {Andresen, Camilla Snowman and Björck, Svante and Bennike, O and Bond, G},
  issn         = {1099-1417},
  keyword      = {biogenic silica,centennial and millennial variability,paleolimnology,paleoclimate,mosses,Neoglaciation,Holocene,southern Greenland},
  language     = {eng},
  number       = {8},
  pages        = {783--795},
  publisher    = {John Wiley & Sons},
  series       = {Journal of Quaternary Science},
  title        = {Holocene climate changes in southern Greenland: evidence from lake sediments},
  url          = {http://dx.doi.org/10.1002/jqs.886},
  volume       = {19},
  year         = {2004},
}