Rapid early-Holocene environmental changes in northern Sweden based on studies of two varved lake-sediment sequences
Mineral magnetic, organic carbon and pollen studies of two varved Holocene lake-sediment sequences in the boreal forest of northern Sweden indicate that significant environmental changes took place between c. 6000 and 5700 BC. This interval is characterized by an increase in mineral-matter accumulat...
Published in: | The Holocene |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2002
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Online Access: | https://lup.lub.lu.se/record/347778 https://doi.org/10.1191/0959683602hl515rp |
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ftulundlup:oai:lup.lub.lu.se:711aa246-106a-4bab-b3b9-7a1d75b1fd00 2023-05-15T16:29:40+02:00 Rapid early-Holocene environmental changes in northern Sweden based on studies of two varved lake-sediment sequences Snowball, Ian Zillén, Lovisa Gaillard, MJ 2002 https://lup.lub.lu.se/record/347778 https://doi.org/10.1191/0959683602hl515rp eng eng SAGE Publications https://lup.lub.lu.se/record/347778 http://dx.doi.org/10.1191/0959683602hl515rp wos:000172904400002 scopus:0036137283 The Holocene; 12(1), pp 7-16 (2002) ISSN: 0959-6836 Geology mineral magnetism pollen climatic change rapid environment change varves Holocene northern Sweden contributiontojournal/article info:eu-repo/semantics/article text 2002 ftulundlup https://doi.org/10.1191/0959683602hl515rp 2023-02-01T23:32:57Z Mineral magnetic, organic carbon and pollen studies of two varved Holocene lake-sediment sequences in the boreal forest of northern Sweden indicate that significant environmental changes took place between c. 6000 and 5700 BC. This interval is characterized by an increase in mineral-matter accumulation, which is a proxy for winter-snow accumulation, and a statistically significant decrease in total pollen influx (predominantly Pinus, Betula and Alnus), which may reflect lower spring and summer temperatures and increased frost frequency. Notable increases in the influx of deciduous tree species (including Quercus and Corylus) suggest a rapid change to warmer conditions between 5700 and 5600 BC. Given dating errors associated with the varve chronologies and the Greenland ice-core timescales, the cold interval can be considered to reflect a regional (possibly global) climatic cooling, which is often referred to as the '8.2 kyr BP cooling event'. However, the younger age of the cold event in northern Sweden does not support the hypothesis of forcing by the sudden drainage of Laurentide glacial lakes into the North Atlantic, unless a minimal 300-year delay in ocean-atmospheric coupling is accepted. The data contribute to a complex picture of early-Holocene environmental change, in response to deglaciation of the Northern Hemisphere. Article in Journal/Newspaper Greenland Greenland ice core ice core North Atlantic Northern Sweden Lund University Publications (LUP) Greenland The Holocene 12 1 7 16 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Geology mineral magnetism pollen climatic change rapid environment change varves Holocene northern Sweden |
spellingShingle |
Geology mineral magnetism pollen climatic change rapid environment change varves Holocene northern Sweden Snowball, Ian Zillén, Lovisa Gaillard, MJ Rapid early-Holocene environmental changes in northern Sweden based on studies of two varved lake-sediment sequences |
topic_facet |
Geology mineral magnetism pollen climatic change rapid environment change varves Holocene northern Sweden |
description |
Mineral magnetic, organic carbon and pollen studies of two varved Holocene lake-sediment sequences in the boreal forest of northern Sweden indicate that significant environmental changes took place between c. 6000 and 5700 BC. This interval is characterized by an increase in mineral-matter accumulation, which is a proxy for winter-snow accumulation, and a statistically significant decrease in total pollen influx (predominantly Pinus, Betula and Alnus), which may reflect lower spring and summer temperatures and increased frost frequency. Notable increases in the influx of deciduous tree species (including Quercus and Corylus) suggest a rapid change to warmer conditions between 5700 and 5600 BC. Given dating errors associated with the varve chronologies and the Greenland ice-core timescales, the cold interval can be considered to reflect a regional (possibly global) climatic cooling, which is often referred to as the '8.2 kyr BP cooling event'. However, the younger age of the cold event in northern Sweden does not support the hypothesis of forcing by the sudden drainage of Laurentide glacial lakes into the North Atlantic, unless a minimal 300-year delay in ocean-atmospheric coupling is accepted. The data contribute to a complex picture of early-Holocene environmental change, in response to deglaciation of the Northern Hemisphere. |
format |
Article in Journal/Newspaper |
author |
Snowball, Ian Zillén, Lovisa Gaillard, MJ |
author_facet |
Snowball, Ian Zillén, Lovisa Gaillard, MJ |
author_sort |
Snowball, Ian |
title |
Rapid early-Holocene environmental changes in northern Sweden based on studies of two varved lake-sediment sequences |
title_short |
Rapid early-Holocene environmental changes in northern Sweden based on studies of two varved lake-sediment sequences |
title_full |
Rapid early-Holocene environmental changes in northern Sweden based on studies of two varved lake-sediment sequences |
title_fullStr |
Rapid early-Holocene environmental changes in northern Sweden based on studies of two varved lake-sediment sequences |
title_full_unstemmed |
Rapid early-Holocene environmental changes in northern Sweden based on studies of two varved lake-sediment sequences |
title_sort |
rapid early-holocene environmental changes in northern sweden based on studies of two varved lake-sediment sequences |
publisher |
SAGE Publications |
publishDate |
2002 |
url |
https://lup.lub.lu.se/record/347778 https://doi.org/10.1191/0959683602hl515rp |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice core ice core North Atlantic Northern Sweden |
genre_facet |
Greenland Greenland ice core ice core North Atlantic Northern Sweden |
op_source |
The Holocene; 12(1), pp 7-16 (2002) ISSN: 0959-6836 |
op_relation |
https://lup.lub.lu.se/record/347778 http://dx.doi.org/10.1191/0959683602hl515rp wos:000172904400002 scopus:0036137283 |
op_doi |
https://doi.org/10.1191/0959683602hl515rp |
container_title |
The Holocene |
container_volume |
12 |
container_issue |
1 |
container_start_page |
7 |
op_container_end_page |
16 |
_version_ |
1766019366489423872 |