Late‐glacial to Holocene environmental changes and climate variability: evidence from Voldafjorden, western Norway
Abstract Sedimentological, micropalaeontological (benthic foraminifers and dinoflagellate cysts), stable isotope data and AMS 14 C datings on cores and surface samples, in addition to acoustic data, have been obtained from Voldafjorden, western Norway. Based on these data the late glacial and Holoce...
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crwiley:10.1002/jqs.593 2024-06-02T08:02:02+00:00 Late‐glacial to Holocene environmental changes and climate variability: evidence from Voldafjorden, western Norway Sejrup, H. P. Haflidason, H. Flatebø, T. Kristensen, D. Klitgaard Grøsfjeld, K. Larsen, E. Research Council of Norway European Union ENAM II Project 2001 http://dx.doi.org/10.1002/jqs.593 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.593 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.593 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 16, issue 2, page 181-198 ISSN 0267-8179 1099-1417 journal-article 2001 crwiley https://doi.org/10.1002/jqs.593 2024-05-03T11:25:22Z Abstract Sedimentological, micropalaeontological (benthic foraminifers and dinoflagellate cysts), stable isotope data and AMS 14 C datings on cores and surface samples, in addition to acoustic data, have been obtained from Voldafjorden, western Norway. Based on these data the late glacial and Holocene sedimentological processes and variability in circulation and fjord environments are outlined. Glacial marine sedimentation prevailed in the Voldafjorden between 11.0 kyr and 9.2 kyr BP (radiocarbon years). In the later part of the Allerød period, and for the rest of the Holocene, there was deposition of fine‐grained normal marine sediments in the fjord basin. Turbidite layers, recorded in core material and on acoustic profiles, dated to ca. 2.1, 6.9–7.6, ca. 9.6 and ca. 11.0 kyr BP, interrupted the marine sedimentation. The event dated to between 6.9 and 7.6 kyr BP probably corresponds to a tsunami resulting from large‐scale sliding on the continental margin off Norway (the Storegga Tsunami). During the later part of the Allerød period, Voldafjorden had a strongly stratified water column with cold bottom water and warm surface water, reaching interglacial temperatures during the summer seasons. During the Younger Dryas cold event there was a return to arctic sea‐surface summer temperatures, possibly with year‐round sea‐ice cover, the entire benthic fauna being composed of arctic species. The first strong Holocene warming, observed simultaneously in bottom and sea‐surface temperature proxies, occurred at ca. 10.1 kyr BP. Bottom water proxies indicate two cold periods, possibly with 2°C lowering of temperatures, at ca. 10.0 (PBO 1) and at 9.8 kyr BP (PBO 2). These events may both result from catastrophic outbursts of Baltic glacial lake water. The remainder of the Holocene experienced variability in basin water temperature, indicated by oxygen isotope measurements with an amplitude of ca. 2°C, with cooler periods at ca. 8.4–9.0, 5.6, 5.2, 4.6, 4.2, 3.5, 2.2, 1.2 and 0.4–0.8 kyr BP. Changes in the fjord hydrology ... Article in Journal/Newspaper Arctic Sea ice Wiley Online Library Arctic Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) Norway Storegga ENVELOPE(18.251,18.251,68.645,68.645) Journal of Quaternary Science 16 2 181 198 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Sedimentological, micropalaeontological (benthic foraminifers and dinoflagellate cysts), stable isotope data and AMS 14 C datings on cores and surface samples, in addition to acoustic data, have been obtained from Voldafjorden, western Norway. Based on these data the late glacial and Holocene sedimentological processes and variability in circulation and fjord environments are outlined. Glacial marine sedimentation prevailed in the Voldafjorden between 11.0 kyr and 9.2 kyr BP (radiocarbon years). In the later part of the Allerød period, and for the rest of the Holocene, there was deposition of fine‐grained normal marine sediments in the fjord basin. Turbidite layers, recorded in core material and on acoustic profiles, dated to ca. 2.1, 6.9–7.6, ca. 9.6 and ca. 11.0 kyr BP, interrupted the marine sedimentation. The event dated to between 6.9 and 7.6 kyr BP probably corresponds to a tsunami resulting from large‐scale sliding on the continental margin off Norway (the Storegga Tsunami). During the later part of the Allerød period, Voldafjorden had a strongly stratified water column with cold bottom water and warm surface water, reaching interglacial temperatures during the summer seasons. During the Younger Dryas cold event there was a return to arctic sea‐surface summer temperatures, possibly with year‐round sea‐ice cover, the entire benthic fauna being composed of arctic species. The first strong Holocene warming, observed simultaneously in bottom and sea‐surface temperature proxies, occurred at ca. 10.1 kyr BP. Bottom water proxies indicate two cold periods, possibly with 2°C lowering of temperatures, at ca. 10.0 (PBO 1) and at 9.8 kyr BP (PBO 2). These events may both result from catastrophic outbursts of Baltic glacial lake water. The remainder of the Holocene experienced variability in basin water temperature, indicated by oxygen isotope measurements with an amplitude of ca. 2°C, with cooler periods at ca. 8.4–9.0, 5.6, 5.2, 4.6, 4.2, 3.5, 2.2, 1.2 and 0.4–0.8 kyr BP. Changes in the fjord hydrology ... |
author2 |
Research Council of Norway European Union ENAM II Project |
format |
Article in Journal/Newspaper |
author |
Sejrup, H. P. Haflidason, H. Flatebø, T. Kristensen, D. Klitgaard Grøsfjeld, K. Larsen, E. |
spellingShingle |
Sejrup, H. P. Haflidason, H. Flatebø, T. Kristensen, D. Klitgaard Grøsfjeld, K. Larsen, E. Late‐glacial to Holocene environmental changes and climate variability: evidence from Voldafjorden, western Norway |
author_facet |
Sejrup, H. P. Haflidason, H. Flatebø, T. Kristensen, D. Klitgaard Grøsfjeld, K. Larsen, E. |
author_sort |
Sejrup, H. P. |
title |
Late‐glacial to Holocene environmental changes and climate variability: evidence from Voldafjorden, western Norway |
title_short |
Late‐glacial to Holocene environmental changes and climate variability: evidence from Voldafjorden, western Norway |
title_full |
Late‐glacial to Holocene environmental changes and climate variability: evidence from Voldafjorden, western Norway |
title_fullStr |
Late‐glacial to Holocene environmental changes and climate variability: evidence from Voldafjorden, western Norway |
title_full_unstemmed |
Late‐glacial to Holocene environmental changes and climate variability: evidence from Voldafjorden, western Norway |
title_sort |
late‐glacial to holocene environmental changes and climate variability: evidence from voldafjorden, western norway |
publisher |
Wiley |
publishDate |
2001 |
url |
http://dx.doi.org/10.1002/jqs.593 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.593 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.593 |
long_lat |
ENVELOPE(-129.463,-129.463,58.259,58.259) ENVELOPE(18.251,18.251,68.645,68.645) |
geographic |
Arctic Glacial Lake Norway Storegga |
geographic_facet |
Arctic Glacial Lake Norway Storegga |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
Journal of Quaternary Science volume 16, issue 2, page 181-198 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.593 |
container_title |
Journal of Quaternary Science |
container_volume |
16 |
container_issue |
2 |
container_start_page |
181 |
op_container_end_page |
198 |
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1800746544538845184 |