Holocene climatic change reconstructed from diatoms, chironomids, pollen and near-infrared spectroscopy at an alpine lake (Sjuodjljaure) in northern Sweden
The results of a multiproxy study reconstructing the climate history of the last 9300 years in northern Sweden are presented. It is based on diatom, chironomid and pollen analyses, as well as near-infrared spectroscopy (NIRS), of a radiocarbon dated sediment core from Sjuodjijaure (67 degrees 22...
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ARNOLD, HODDER HEADLINE PLC
2001
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ftucl:oai:eprints.ucl.ac.uk.OAI2:156161 2023-05-15T12:59:44+02:00 Holocene climatic change reconstructed from diatoms, chironomids, pollen and near-infrared spectroscopy at an alpine lake (Sjuodjljaure) in northern Sweden Rosen, P Segerstrom, U Eriksson, L Renberg, I Birks, HJB 2001 http://discovery.ucl.ac.uk/156161/ unknown ARNOLD, HODDER HEADLINE PLC HOLOCENE , 11 (5) 551 - 562. (2001) Holocene climate lake sediments northern Sweden pollen chironomid diatom near-infrared spectroscopy QUANTITATIVE INDICATORS REFLECTANCE SPECTROSCOPY WESTERN NORWAY ABISKO AREA SEDIMENTS TEMPERATURES PH FENNOSCANDIA CALIBRATION ASSEMBLAGES Article 2001 ftucl 2016-10-20T22:18:18Z The results of a multiproxy study reconstructing the climate history of the last 9300 years in northern Sweden are presented. It is based on diatom, chironomid and pollen analyses, as well as near-infrared spectroscopy (NIRS), of a radiocarbon dated sediment core from Sjuodjijaure (67 degrees 22'N, 18 degrees 04'E), situated 100 m above tree-line in the Scandes mountains. Mean July air temperature was reconstructed using transfer functions established for the region. The biological proxies show significant changes in composition during the Holocene and the inferred temperatures all follow the same general trend. For the period between about 9300 to 7300 cal. BP the reconstructions should be interpreted with caution due to the lack of convincing modem analogues in the training set. However the reconstruction suggest that July temperature was on average about the same as today, with several rapid short-term cold and warm periods. Cold periods were dated to about 8500, 8200 and 7600 cal. years BP and a warm period to about 7700 cal. BP. About 7300 cal. BP, a major shift to a warmer climate occurred. Pine migrated into the area, which was previously covered with birch forest. From the mid-Holocene until today the sediment record suggests a descending tree-limit and a gradual lowering of July temperature. Article in Journal/Newspaper Abisko Fennoscandia Northern Sweden University College London: UCL Discovery Abisko ENVELOPE(18.829,18.829,68.349,68.349) Alpine Lake ENVELOPE(-129.182,-129.182,55.529,55.529) Norway |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
unknown |
topic |
Holocene climate lake sediments northern Sweden pollen chironomid diatom near-infrared spectroscopy QUANTITATIVE INDICATORS REFLECTANCE SPECTROSCOPY WESTERN NORWAY ABISKO AREA SEDIMENTS TEMPERATURES PH FENNOSCANDIA CALIBRATION ASSEMBLAGES |
spellingShingle |
Holocene climate lake sediments northern Sweden pollen chironomid diatom near-infrared spectroscopy QUANTITATIVE INDICATORS REFLECTANCE SPECTROSCOPY WESTERN NORWAY ABISKO AREA SEDIMENTS TEMPERATURES PH FENNOSCANDIA CALIBRATION ASSEMBLAGES Rosen, P Segerstrom, U Eriksson, L Renberg, I Birks, HJB Holocene climatic change reconstructed from diatoms, chironomids, pollen and near-infrared spectroscopy at an alpine lake (Sjuodjljaure) in northern Sweden |
topic_facet |
Holocene climate lake sediments northern Sweden pollen chironomid diatom near-infrared spectroscopy QUANTITATIVE INDICATORS REFLECTANCE SPECTROSCOPY WESTERN NORWAY ABISKO AREA SEDIMENTS TEMPERATURES PH FENNOSCANDIA CALIBRATION ASSEMBLAGES |
description |
The results of a multiproxy study reconstructing the climate history of the last 9300 years in northern Sweden are presented. It is based on diatom, chironomid and pollen analyses, as well as near-infrared spectroscopy (NIRS), of a radiocarbon dated sediment core from Sjuodjijaure (67 degrees 22'N, 18 degrees 04'E), situated 100 m above tree-line in the Scandes mountains. Mean July air temperature was reconstructed using transfer functions established for the region. The biological proxies show significant changes in composition during the Holocene and the inferred temperatures all follow the same general trend. For the period between about 9300 to 7300 cal. BP the reconstructions should be interpreted with caution due to the lack of convincing modem analogues in the training set. However the reconstruction suggest that July temperature was on average about the same as today, with several rapid short-term cold and warm periods. Cold periods were dated to about 8500, 8200 and 7600 cal. years BP and a warm period to about 7700 cal. BP. About 7300 cal. BP, a major shift to a warmer climate occurred. Pine migrated into the area, which was previously covered with birch forest. From the mid-Holocene until today the sediment record suggests a descending tree-limit and a gradual lowering of July temperature. |
format |
Article in Journal/Newspaper |
author |
Rosen, P Segerstrom, U Eriksson, L Renberg, I Birks, HJB |
author_facet |
Rosen, P Segerstrom, U Eriksson, L Renberg, I Birks, HJB |
author_sort |
Rosen, P |
title |
Holocene climatic change reconstructed from diatoms, chironomids, pollen and near-infrared spectroscopy at an alpine lake (Sjuodjljaure) in northern Sweden |
title_short |
Holocene climatic change reconstructed from diatoms, chironomids, pollen and near-infrared spectroscopy at an alpine lake (Sjuodjljaure) in northern Sweden |
title_full |
Holocene climatic change reconstructed from diatoms, chironomids, pollen and near-infrared spectroscopy at an alpine lake (Sjuodjljaure) in northern Sweden |
title_fullStr |
Holocene climatic change reconstructed from diatoms, chironomids, pollen and near-infrared spectroscopy at an alpine lake (Sjuodjljaure) in northern Sweden |
title_full_unstemmed |
Holocene climatic change reconstructed from diatoms, chironomids, pollen and near-infrared spectroscopy at an alpine lake (Sjuodjljaure) in northern Sweden |
title_sort |
holocene climatic change reconstructed from diatoms, chironomids, pollen and near-infrared spectroscopy at an alpine lake (sjuodjljaure) in northern sweden |
publisher |
ARNOLD, HODDER HEADLINE PLC |
publishDate |
2001 |
url |
http://discovery.ucl.ac.uk/156161/ |
long_lat |
ENVELOPE(18.829,18.829,68.349,68.349) ENVELOPE(-129.182,-129.182,55.529,55.529) |
geographic |
Abisko Alpine Lake Norway |
geographic_facet |
Abisko Alpine Lake Norway |
genre |
Abisko Fennoscandia Northern Sweden |
genre_facet |
Abisko Fennoscandia Northern Sweden |
op_source |
HOLOCENE , 11 (5) 551 - 562. (2001) |
_version_ |
1766091835665547264 |