Biostratigraphic Evidence of the Allerød-Younger Dryas-Preboreal Oscillation in Northern Iceland
Basal sediments of Lake Torfadalsvatn, northern Iceland, record changes in terrestrial and limnic environments in the period 11,300-9000 14C yr B.P. These changes were probably forced by climate and connected with displacements of the marine polar front and sea-ice margin. Pollen, spores, green alga...
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Academic Press
1995
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Online Access: | https://lup.lub.lu.se/record/b19ad92d-2392-44ae-9088-05f0cda585ee https://doi.org/10.1006/qres.1995.1085 |
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ftulundlup:oai:lup.lub.lu.se:b19ad92d-2392-44ae-9088-05f0cda585ee 2023-05-15T16:46:26+02:00 Biostratigraphic Evidence of the Allerød-Younger Dryas-Preboreal Oscillation in Northern Iceland Rundgren, Mats 1995-01-01 https://lup.lub.lu.se/record/b19ad92d-2392-44ae-9088-05f0cda585ee https://doi.org/10.1006/qres.1995.1085 eng eng Academic Press https://lup.lub.lu.se/record/b19ad92d-2392-44ae-9088-05f0cda585ee http://dx.doi.org/10.1006/qres.1995.1085 scopus:0029500170 Quaternary Research; 44(3), pp 405-416 (1995) ISSN: 0033-5894 Climate Research Environmental Sciences Geology contributiontojournal/article info:eu-repo/semantics/article text 1995 ftulundlup https://doi.org/10.1006/qres.1995.1085 2023-02-01T23:37:25Z Basal sediments of Lake Torfadalsvatn, northern Iceland, record changes in terrestrial and limnic environments in the period 11,300-9000 14C yr B.P. These changes were probably forced by climate and connected with displacements of the marine polar front and sea-ice margin. Pollen, spores, green algae (Pediastrum), saturation isothermal remanent magnetization, and carbon content of the basal sediments provide the first detailed biostratigraphic record of the last glacial-interglacial transition in Iceland. During the first pioneer phase, beginning at ca. 11,300 14C yr B.P., grasses and fell-field herbs became established, and lake productivity was very low. At ca. 10,900 14C yr B.P., climatic and soil conditions became favorable for shrubs and dwarf shrubs. This change, together with increased limnic productivity, clearly indicates long seasons without ice-cover in the sea immediately north of Iceland. A return to a colder climate (Younger Dryas), probably in connection with a southward displacement of the marine polar front, occurred by 10,600 14C yr B.P. Shrub and dwarf-shrub vegetation disappeared, and limnic productivity diminished. A second pioneer vegetation phase, dominated by Oxyria/Rumex and grasses, was initiated by a change to longer seasons without sea ice at ca. 9900 14C yr B.P. This warming is also evident as a contemporaneous increase in lake productivity. After ca. 9400 14C yr B.P. the reestablishment of dwarf-shrub heaths and very high limnic productivity indicate further warming. Article in Journal/Newspaper Iceland Sea ice Lund University Publications (LUP) Torfadalsvatn ENVELOPE(-20.383,-20.383,66.062,66.062) Quaternary Research 44 3 405 416 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Climate Research Environmental Sciences Geology |
spellingShingle |
Climate Research Environmental Sciences Geology Rundgren, Mats Biostratigraphic Evidence of the Allerød-Younger Dryas-Preboreal Oscillation in Northern Iceland |
topic_facet |
Climate Research Environmental Sciences Geology |
description |
Basal sediments of Lake Torfadalsvatn, northern Iceland, record changes in terrestrial and limnic environments in the period 11,300-9000 14C yr B.P. These changes were probably forced by climate and connected with displacements of the marine polar front and sea-ice margin. Pollen, spores, green algae (Pediastrum), saturation isothermal remanent magnetization, and carbon content of the basal sediments provide the first detailed biostratigraphic record of the last glacial-interglacial transition in Iceland. During the first pioneer phase, beginning at ca. 11,300 14C yr B.P., grasses and fell-field herbs became established, and lake productivity was very low. At ca. 10,900 14C yr B.P., climatic and soil conditions became favorable for shrubs and dwarf shrubs. This change, together with increased limnic productivity, clearly indicates long seasons without ice-cover in the sea immediately north of Iceland. A return to a colder climate (Younger Dryas), probably in connection with a southward displacement of the marine polar front, occurred by 10,600 14C yr B.P. Shrub and dwarf-shrub vegetation disappeared, and limnic productivity diminished. A second pioneer vegetation phase, dominated by Oxyria/Rumex and grasses, was initiated by a change to longer seasons without sea ice at ca. 9900 14C yr B.P. This warming is also evident as a contemporaneous increase in lake productivity. After ca. 9400 14C yr B.P. the reestablishment of dwarf-shrub heaths and very high limnic productivity indicate further warming. |
format |
Article in Journal/Newspaper |
author |
Rundgren, Mats |
author_facet |
Rundgren, Mats |
author_sort |
Rundgren, Mats |
title |
Biostratigraphic Evidence of the Allerød-Younger Dryas-Preboreal Oscillation in Northern Iceland |
title_short |
Biostratigraphic Evidence of the Allerød-Younger Dryas-Preboreal Oscillation in Northern Iceland |
title_full |
Biostratigraphic Evidence of the Allerød-Younger Dryas-Preboreal Oscillation in Northern Iceland |
title_fullStr |
Biostratigraphic Evidence of the Allerød-Younger Dryas-Preboreal Oscillation in Northern Iceland |
title_full_unstemmed |
Biostratigraphic Evidence of the Allerød-Younger Dryas-Preboreal Oscillation in Northern Iceland |
title_sort |
biostratigraphic evidence of the allerød-younger dryas-preboreal oscillation in northern iceland |
publisher |
Academic Press |
publishDate |
1995 |
url |
https://lup.lub.lu.se/record/b19ad92d-2392-44ae-9088-05f0cda585ee https://doi.org/10.1006/qres.1995.1085 |
long_lat |
ENVELOPE(-20.383,-20.383,66.062,66.062) |
geographic |
Torfadalsvatn |
geographic_facet |
Torfadalsvatn |
genre |
Iceland Sea ice |
genre_facet |
Iceland Sea ice |
op_source |
Quaternary Research; 44(3), pp 405-416 (1995) ISSN: 0033-5894 |
op_relation |
https://lup.lub.lu.se/record/b19ad92d-2392-44ae-9088-05f0cda585ee http://dx.doi.org/10.1006/qres.1995.1085 scopus:0029500170 |
op_doi |
https://doi.org/10.1006/qres.1995.1085 |
container_title |
Quaternary Research |
container_volume |
44 |
container_issue |
3 |
container_start_page |
405 |
op_container_end_page |
416 |
_version_ |
1766036534840000512 |