First physical evidence for forested environment in the Arctic during MIS 3
Old sedimentological and geochronological records can be preserved underneath the central parts of the continental ice sheets under non-erosive, cold-based subglacial conditions. Organic deposits that predate the last deglaciation are of particular value for the information held on glacial-time clim...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/166058 2024-01-07T09:40:46+01:00 First physical evidence for forested environment in the Arctic during MIS 3 Sarala, Pertti Väliranta, Minna Eskola, Tiina Vaikutiene, Giedre Environmental Sciences Environmental Change Research Unit (ECRU) 2016-08-23T09:40:02Z 9 application/pdf http://hdl.handle.net/10138/166058 eng eng Nature Publishing Group 10.1038/srep29054 Support for the study was provided by the Geological Survey of Finland and the Universities of Helsinki, Oulu and Vilnius. We are thankful to Mr. Antti Kohtamaki, Mr. Ami Telila and Ms. Henriikka Kivila for the assistant during the field work and sampling, Mrs. Riitta Kontio for providing help in the pollen and LOI preparation, Dr. Kari O. Eskola for discussion of the OSL dating data and Dr. Adrian Hall for the valuable comments to improve the manuscript. Sarala , P , Väliranta , M , Eskola , T & Vaikutiene , G 2016 , ' First physical evidence for forested environment in the Arctic during MIS 3 ' , Scientific Reports , vol. 6 , 29054 . https://doi.org/10.1038/srep29054 ORCID: /0000-0003-0129-7240/work/29911318 84976896511 05b785b8-933f-433a-83ce-468463e7cd2e http://hdl.handle.net/10138/166058 000378847800001 cc_by openAccess info:eu-repo/semantics/openAccess INTERGLACIAL-GLACIAL CYCLE MARINE ISOTOPE STAGE-3 NORTHERN SWEDEN FINNISH LAPLAND ICE-FREE NORTHEASTERN FENNOSCANDIA WEICHSELIAN CLIMATE POLLEN RECORDS SEDIMENTS FINLAND 1172 Environmental sciences Article publishedVersion 2016 ftunivhelsihelda 2023-12-14T00:11:33Z Old sedimentological and geochronological records can be preserved underneath the central parts of the continental ice sheets under non-erosive, cold-based subglacial conditions. Organic deposits that predate the last deglaciation are of particular value for the information held on glacial-time climate and environmental conditions. In this study, we present multiproxy data derived from a well-preserved MIS 3 interstadial (55-25 ka ago) organic layer from inside the Arctic Circle in the Finnish Lapland. Biological proxy evidence, namely coming from aquatic plant species, indicates July temperatures as high as 14.4 degrees C, i.e. higher than those of today for the study site. Macrofossil evidence demonstrates for the first time the presence of pines accompanied by tree birch during the MIS 3 interstadial in northern Fennoscandia. These results concur with contemporary insolation model outcomes but contradict with the previous proxy-based view of open tundra conditions during the MIS 3. The data suggest that there are highly dynamic interstadial continental ice-sheet dynamics following changes in orbital forcing. Warm climate enabled the establishment of forests on exposed landscape. Moreover, we suggest that in the light of these new data, previous MIS 3 pollen data could be re-interpreted. Peer reviewed Article in Journal/Newspaper Arctic Arctic Fennoscandia Ice Sheet Northern Sweden Tundra Lapland HELDA – University of Helsinki Open Repository Arctic Scientific Reports 6 1 |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
INTERGLACIAL-GLACIAL CYCLE MARINE ISOTOPE STAGE-3 NORTHERN SWEDEN FINNISH LAPLAND ICE-FREE NORTHEASTERN FENNOSCANDIA WEICHSELIAN CLIMATE POLLEN RECORDS SEDIMENTS FINLAND 1172 Environmental sciences |
spellingShingle |
INTERGLACIAL-GLACIAL CYCLE MARINE ISOTOPE STAGE-3 NORTHERN SWEDEN FINNISH LAPLAND ICE-FREE NORTHEASTERN FENNOSCANDIA WEICHSELIAN CLIMATE POLLEN RECORDS SEDIMENTS FINLAND 1172 Environmental sciences Sarala, Pertti Väliranta, Minna Eskola, Tiina Vaikutiene, Giedre First physical evidence for forested environment in the Arctic during MIS 3 |
topic_facet |
INTERGLACIAL-GLACIAL CYCLE MARINE ISOTOPE STAGE-3 NORTHERN SWEDEN FINNISH LAPLAND ICE-FREE NORTHEASTERN FENNOSCANDIA WEICHSELIAN CLIMATE POLLEN RECORDS SEDIMENTS FINLAND 1172 Environmental sciences |
description |
Old sedimentological and geochronological records can be preserved underneath the central parts of the continental ice sheets under non-erosive, cold-based subglacial conditions. Organic deposits that predate the last deglaciation are of particular value for the information held on glacial-time climate and environmental conditions. In this study, we present multiproxy data derived from a well-preserved MIS 3 interstadial (55-25 ka ago) organic layer from inside the Arctic Circle in the Finnish Lapland. Biological proxy evidence, namely coming from aquatic plant species, indicates July temperatures as high as 14.4 degrees C, i.e. higher than those of today for the study site. Macrofossil evidence demonstrates for the first time the presence of pines accompanied by tree birch during the MIS 3 interstadial in northern Fennoscandia. These results concur with contemporary insolation model outcomes but contradict with the previous proxy-based view of open tundra conditions during the MIS 3. The data suggest that there are highly dynamic interstadial continental ice-sheet dynamics following changes in orbital forcing. Warm climate enabled the establishment of forests on exposed landscape. Moreover, we suggest that in the light of these new data, previous MIS 3 pollen data could be re-interpreted. Peer reviewed |
author2 |
Environmental Sciences Environmental Change Research Unit (ECRU) |
format |
Article in Journal/Newspaper |
author |
Sarala, Pertti Väliranta, Minna Eskola, Tiina Vaikutiene, Giedre |
author_facet |
Sarala, Pertti Väliranta, Minna Eskola, Tiina Vaikutiene, Giedre |
author_sort |
Sarala, Pertti |
title |
First physical evidence for forested environment in the Arctic during MIS 3 |
title_short |
First physical evidence for forested environment in the Arctic during MIS 3 |
title_full |
First physical evidence for forested environment in the Arctic during MIS 3 |
title_fullStr |
First physical evidence for forested environment in the Arctic during MIS 3 |
title_full_unstemmed |
First physical evidence for forested environment in the Arctic during MIS 3 |
title_sort |
first physical evidence for forested environment in the arctic during mis 3 |
publisher |
Nature Publishing Group |
publishDate |
2016 |
url |
http://hdl.handle.net/10138/166058 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Fennoscandia Ice Sheet Northern Sweden Tundra Lapland |
genre_facet |
Arctic Arctic Fennoscandia Ice Sheet Northern Sweden Tundra Lapland |
op_relation |
10.1038/srep29054 Support for the study was provided by the Geological Survey of Finland and the Universities of Helsinki, Oulu and Vilnius. We are thankful to Mr. Antti Kohtamaki, Mr. Ami Telila and Ms. Henriikka Kivila for the assistant during the field work and sampling, Mrs. Riitta Kontio for providing help in the pollen and LOI preparation, Dr. Kari O. Eskola for discussion of the OSL dating data and Dr. Adrian Hall for the valuable comments to improve the manuscript. Sarala , P , Väliranta , M , Eskola , T & Vaikutiene , G 2016 , ' First physical evidence for forested environment in the Arctic during MIS 3 ' , Scientific Reports , vol. 6 , 29054 . https://doi.org/10.1038/srep29054 ORCID: /0000-0003-0129-7240/work/29911318 84976896511 05b785b8-933f-433a-83ce-468463e7cd2e http://hdl.handle.net/10138/166058 000378847800001 |
op_rights |
cc_by openAccess info:eu-repo/semantics/openAccess |
container_title |
Scientific Reports |
container_volume |
6 |
container_issue |
1 |
_version_ |
1787421560622022656 |