Holocene vegetation dynamics and inferred climate changes at Svanavatnet, Mo i Rana, northern Norway
Pollen and plant macrofossil analyses from Svanavatnet in northern Norway provide records of past vegetation and climate in this region from c. 8700 cal.yr BP until the present. Pollen accumulation rates and the presence of plant macrofossils indicate that Betula pubescens (birch) was present from c...
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2008
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ftucl:oai:eprints.ucl.ac.uk.OAI2:166198 2023-05-15T16:21:57+02:00 Holocene vegetation dynamics and inferred climate changes at Svanavatnet, Mo i Rana, northern Norway Bjune, AE Birks, HJB 2008 http://discovery.ucl.ac.uk/166198/ unknown BLACKWELL PUBLISHING BOREAS , 37 (1) 146 - 156. (2008) EQUILIBRIUM-LINE ALTITUDES CENTRAL-SOUTHERN NORWAY WESTERN NORWAY TREE-LINE SCANDES-MOUNTAINS PLANT MACROFOSSILS WINTER-PRECIPITATION LACUSTRINE CARBONATES GLACIER FLUCTUATIONS MEGAFOSSIL EVIDENCE Article 2008 ftucl 2016-01-21T23:19:41Z Pollen and plant macrofossil analyses from Svanavatnet in northern Norway provide records of past vegetation and climate in this region from c. 8700 cal.yr BP until the present. Pollen accumulation rates and the presence of plant macrofossils indicate that Betula pubescens (birch) was present from c. 8600 cal.yr BP and Pinus sylvestris (pine) from c. 8200 cal.yr BP. Quantitative climate is reconstructed using modern pollen-climate transfer functions based on weighted-averaging partial least squares regression. A rapid increase in mean July temperature (T-jul) and mean annual precipitation (P-ann) is inferred for the early Holocene. At times when tree abundance is at its highest and most diverse, inferred Tjul indicates maximum temperatures during the mid-Holocene of about 2 degrees C warmer than at present. During the same time period, inferred Pann is 200 - 300mm above present-day conditions until c. 3000 cal.yr BP. Mean January temperatures (T-jan) are reconstructed to be about 2 degrees C warmer than today from 8000 to 3500 cal.yr BP. After 3500 cal.yr BP until today, a gradual decrease is seen in all the reconstructed climate parameters, together with a reduction in tree abundance and the development of a mosaic of open vegetation with grasses, dwarf shrubs and wet areas, and of woodland containing B. pubescens, P. sylvestris and Picea abies (spruce). Article in Journal/Newspaper glacier Mo i Rana Northern Norway University College London: UCL Discovery Mo i Rana ENVELOPE(14.133,14.133,66.310,66.310) Norway Svanavatnet ENVELOPE(11.414,11.414,64.568,64.568) |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
unknown |
topic |
EQUILIBRIUM-LINE ALTITUDES CENTRAL-SOUTHERN NORWAY WESTERN NORWAY TREE-LINE SCANDES-MOUNTAINS PLANT MACROFOSSILS WINTER-PRECIPITATION LACUSTRINE CARBONATES GLACIER FLUCTUATIONS MEGAFOSSIL EVIDENCE |
spellingShingle |
EQUILIBRIUM-LINE ALTITUDES CENTRAL-SOUTHERN NORWAY WESTERN NORWAY TREE-LINE SCANDES-MOUNTAINS PLANT MACROFOSSILS WINTER-PRECIPITATION LACUSTRINE CARBONATES GLACIER FLUCTUATIONS MEGAFOSSIL EVIDENCE Bjune, AE Birks, HJB Holocene vegetation dynamics and inferred climate changes at Svanavatnet, Mo i Rana, northern Norway |
topic_facet |
EQUILIBRIUM-LINE ALTITUDES CENTRAL-SOUTHERN NORWAY WESTERN NORWAY TREE-LINE SCANDES-MOUNTAINS PLANT MACROFOSSILS WINTER-PRECIPITATION LACUSTRINE CARBONATES GLACIER FLUCTUATIONS MEGAFOSSIL EVIDENCE |
description |
Pollen and plant macrofossil analyses from Svanavatnet in northern Norway provide records of past vegetation and climate in this region from c. 8700 cal.yr BP until the present. Pollen accumulation rates and the presence of plant macrofossils indicate that Betula pubescens (birch) was present from c. 8600 cal.yr BP and Pinus sylvestris (pine) from c. 8200 cal.yr BP. Quantitative climate is reconstructed using modern pollen-climate transfer functions based on weighted-averaging partial least squares regression. A rapid increase in mean July temperature (T-jul) and mean annual precipitation (P-ann) is inferred for the early Holocene. At times when tree abundance is at its highest and most diverse, inferred Tjul indicates maximum temperatures during the mid-Holocene of about 2 degrees C warmer than at present. During the same time period, inferred Pann is 200 - 300mm above present-day conditions until c. 3000 cal.yr BP. Mean January temperatures (T-jan) are reconstructed to be about 2 degrees C warmer than today from 8000 to 3500 cal.yr BP. After 3500 cal.yr BP until today, a gradual decrease is seen in all the reconstructed climate parameters, together with a reduction in tree abundance and the development of a mosaic of open vegetation with grasses, dwarf shrubs and wet areas, and of woodland containing B. pubescens, P. sylvestris and Picea abies (spruce). |
format |
Article in Journal/Newspaper |
author |
Bjune, AE Birks, HJB |
author_facet |
Bjune, AE Birks, HJB |
author_sort |
Bjune, AE |
title |
Holocene vegetation dynamics and inferred climate changes at Svanavatnet, Mo i Rana, northern Norway |
title_short |
Holocene vegetation dynamics and inferred climate changes at Svanavatnet, Mo i Rana, northern Norway |
title_full |
Holocene vegetation dynamics and inferred climate changes at Svanavatnet, Mo i Rana, northern Norway |
title_fullStr |
Holocene vegetation dynamics and inferred climate changes at Svanavatnet, Mo i Rana, northern Norway |
title_full_unstemmed |
Holocene vegetation dynamics and inferred climate changes at Svanavatnet, Mo i Rana, northern Norway |
title_sort |
holocene vegetation dynamics and inferred climate changes at svanavatnet, mo i rana, northern norway |
publisher |
BLACKWELL PUBLISHING |
publishDate |
2008 |
url |
http://discovery.ucl.ac.uk/166198/ |
long_lat |
ENVELOPE(14.133,14.133,66.310,66.310) ENVELOPE(11.414,11.414,64.568,64.568) |
geographic |
Mo i Rana Norway Svanavatnet |
geographic_facet |
Mo i Rana Norway Svanavatnet |
genre |
glacier Mo i Rana Northern Norway |
genre_facet |
glacier Mo i Rana Northern Norway |
op_source |
BOREAS , 37 (1) 146 - 156. (2008) |
_version_ |
1766009929079980032 |