Dinoflagellate cysts reflecting surface‐water conditions in Voldafjorden, western Norway during the last 11 300 years
Abundant dinocysts in a high‐resolution core from Voldafjorden, western Norway, reflect changes in sea surface‐water conditions during the last c. 11 300 BP. The period from c. 11 300 to 10 800 BP (Late Allerφd) was characterized by cool temperate surface‐waters, high annual temperature variation an...
Published in: | Boreas |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
1999
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/j.1502-3885.1999.tb00229.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.1999.tb00229.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.1999.tb00229.x |
id |
crwiley:10.1111/j.1502-3885.1999.tb00229.x |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/j.1502-3885.1999.tb00229.x 2024-06-02T08:14:22+00:00 Dinoflagellate cysts reflecting surface‐water conditions in Voldafjorden, western Norway during the last 11 300 years GRφSFJELD, KARI LARSEN, EILIV SEJRUP, HANS PETTER VERNAL, ANNE DE FLATEBφ, TROND VESTBφ, MONICA HAFLIDASON, HAFLIDI AARSETH, INGE 1999 http://dx.doi.org/10.1111/j.1502-3885.1999.tb00229.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.1999.tb00229.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.1999.tb00229.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Boreas volume 28, issue 3, page 403-415 ISSN 0300-9483 1502-3885 journal-article 1999 crwiley https://doi.org/10.1111/j.1502-3885.1999.tb00229.x 2024-05-03T10:40:17Z Abundant dinocysts in a high‐resolution core from Voldafjorden, western Norway, reflect changes in sea surface‐water conditions during the last c. 11 300 BP. The period from c. 11 300 to 10 800 BP (Late Allerφd) was characterized by cool temperate surface‐waters, high annual temperature variation and relatively strong stratification of the water column, which is characteristic of fjord environments. Due to the stratification of the surface waters, the uppermost layer may have warmed considerably. This generated a principal difference in temperature conditions between land and sea, with slightly higher temperatures in the marine environments. The period from c. 10 800 to 10 000 BP is characterized by very harsh conditions, with sea surface‐water temperatures close to freezing and long lasting seasonal sea‐ice cover. Similar temperature changes at the beginning and end of the Younger Dryas are characteristic for NW Europe, but those in Voldafjorden differ from those in the open sea and in the Norwegian Channel by being significantly larger. The stratification of the water column during the Late Allerφd was probably broken down because of incipient inflow of temperate normal saline waters, which caused a marked sea surface‐water warming, at c. 10 000 BP. Surface‐water conditions close to those of today were gradually established between c. 10000 and 9500 BP. However, these interglacial conditions were abruptly interrupted by a significant drop in winter sea surface‐water temperature and salinity occurring around 9700 BP. From c. 9500 to 7000 BP the influence of temperate normal saline water masses increased stepwise until full interglacial conditions were established around c. 7000 BP. The change in the dinocyst assemblage around 7000 BP in Voldafjorden was probably related to the onset of the modern Norwegian Coastal Current, previously documented in cores from the Skagerrak and the Mid‐Norwegian Continental Shelf. The last c. 7000 BP is characterized by relatively stable surface‐water conditions, possibly ... Article in Journal/Newspaper Sea ice Wiley Online Library Norway Boreas 28 3 403 415 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abundant dinocysts in a high‐resolution core from Voldafjorden, western Norway, reflect changes in sea surface‐water conditions during the last c. 11 300 BP. The period from c. 11 300 to 10 800 BP (Late Allerφd) was characterized by cool temperate surface‐waters, high annual temperature variation and relatively strong stratification of the water column, which is characteristic of fjord environments. Due to the stratification of the surface waters, the uppermost layer may have warmed considerably. This generated a principal difference in temperature conditions between land and sea, with slightly higher temperatures in the marine environments. The period from c. 10 800 to 10 000 BP is characterized by very harsh conditions, with sea surface‐water temperatures close to freezing and long lasting seasonal sea‐ice cover. Similar temperature changes at the beginning and end of the Younger Dryas are characteristic for NW Europe, but those in Voldafjorden differ from those in the open sea and in the Norwegian Channel by being significantly larger. The stratification of the water column during the Late Allerφd was probably broken down because of incipient inflow of temperate normal saline waters, which caused a marked sea surface‐water warming, at c. 10 000 BP. Surface‐water conditions close to those of today were gradually established between c. 10000 and 9500 BP. However, these interglacial conditions were abruptly interrupted by a significant drop in winter sea surface‐water temperature and salinity occurring around 9700 BP. From c. 9500 to 7000 BP the influence of temperate normal saline water masses increased stepwise until full interglacial conditions were established around c. 7000 BP. The change in the dinocyst assemblage around 7000 BP in Voldafjorden was probably related to the onset of the modern Norwegian Coastal Current, previously documented in cores from the Skagerrak and the Mid‐Norwegian Continental Shelf. The last c. 7000 BP is characterized by relatively stable surface‐water conditions, possibly ... |
format |
Article in Journal/Newspaper |
author |
GRφSFJELD, KARI LARSEN, EILIV SEJRUP, HANS PETTER VERNAL, ANNE DE FLATEBφ, TROND VESTBφ, MONICA HAFLIDASON, HAFLIDI AARSETH, INGE |
spellingShingle |
GRφSFJELD, KARI LARSEN, EILIV SEJRUP, HANS PETTER VERNAL, ANNE DE FLATEBφ, TROND VESTBφ, MONICA HAFLIDASON, HAFLIDI AARSETH, INGE Dinoflagellate cysts reflecting surface‐water conditions in Voldafjorden, western Norway during the last 11 300 years |
author_facet |
GRφSFJELD, KARI LARSEN, EILIV SEJRUP, HANS PETTER VERNAL, ANNE DE FLATEBφ, TROND VESTBφ, MONICA HAFLIDASON, HAFLIDI AARSETH, INGE |
author_sort |
GRφSFJELD, KARI |
title |
Dinoflagellate cysts reflecting surface‐water conditions in Voldafjorden, western Norway during the last 11 300 years |
title_short |
Dinoflagellate cysts reflecting surface‐water conditions in Voldafjorden, western Norway during the last 11 300 years |
title_full |
Dinoflagellate cysts reflecting surface‐water conditions in Voldafjorden, western Norway during the last 11 300 years |
title_fullStr |
Dinoflagellate cysts reflecting surface‐water conditions in Voldafjorden, western Norway during the last 11 300 years |
title_full_unstemmed |
Dinoflagellate cysts reflecting surface‐water conditions in Voldafjorden, western Norway during the last 11 300 years |
title_sort |
dinoflagellate cysts reflecting surface‐water conditions in voldafjorden, western norway during the last 11 300 years |
publisher |
Wiley |
publishDate |
1999 |
url |
http://dx.doi.org/10.1111/j.1502-3885.1999.tb00229.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.1999.tb00229.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.1999.tb00229.x |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Boreas volume 28, issue 3, page 403-415 ISSN 0300-9483 1502-3885 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1502-3885.1999.tb00229.x |
container_title |
Boreas |
container_volume |
28 |
container_issue |
3 |
container_start_page |
403 |
op_container_end_page |
415 |
_version_ |
1800738176435748864 |