Brine formation in relation to climate changes and ice retreat during the last 15,000 years in Storfjorden, Svalbard, 76–78°N
Storfjorden, Svalbard, is an area of intense brine formation. The brine is cold, dense, rich in oxygen and CO2, and has reduced pH. Storfjorden is unique because it contains well-preserved agglutinated foraminifera dating back to the beginning of the last deglaciation. We have investigated the distr...
Published in: | Paleoceanography |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Geophysical Union
2014
|
Subjects: | |
Online Access: | https://hdl.handle.net/10037/12103 https://doi.org/10.1002/2014PA002643 |
id |
ftunivtroemsoe:oai:munin.uit.no:10037/12103 |
---|---|
record_format |
openpolar |
spelling |
ftunivtroemsoe:oai:munin.uit.no:10037/12103 2023-05-15T14:26:46+02:00 Brine formation in relation to climate changes and ice retreat during the last 15,000 years in Storfjorden, Svalbard, 76–78°N Rasmussen, Tine Lander Thomsen, Erik 2014-10-06 https://hdl.handle.net/10037/12103 https://doi.org/10.1002/2014PA002643 eng eng American Geophysical Union Paleoceanography info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE Rasmussen, T.L.R., Thomsen, E. Brine formation in relation to climate changes and ice retreat during the last 15,000 years in Storfjorden, Svalbard, 76–78°N. Paleoceanography. 2014;29(10):911-929 FRIDAID 1161724 doi:10.1002/2014PA002643 0883-8305 1944-9186 https://hdl.handle.net/10037/12103 openAccess VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 VDP::Mathematics and natural science: 400::Geosciences: 450 Journal article Tidsskriftartikkel Peer reviewed 2014 ftunivtroemsoe https://doi.org/10.1002/2014PA002643 2021-06-25T17:55:48Z Storfjorden, Svalbard, is an area of intense brine formation. The brine is cold, dense, rich in oxygen and CO2, and has reduced pH. Storfjorden is unique because it contains well-preserved agglutinated foraminifera dating back to the beginning of the last deglaciation. We have investigated the distribution of calcareous and agglutinated benthic foraminifera, benthic oxygen and carbon isotopes, calcium carbonate, total organic carbon, and ice-rafted debris in five cores from Storfjorden comprising the Holocene and the deglaciation. The purpose of the study is to reconstruct brine formation in the past under different climate scenarios. The data indicate that in Storfjorden the ratio of agglutinated to calcareous benthic foraminifera can be taken as a measure of the strength of brine formation. The foraminiferal data, which are supported by stable isotopes, degree of fragmentation, and geochemical parameters, signify that brine formation intensified during cold periods and weakened during warm periods. During the deglaciation, increased brine flow coincides with the Older Dryas, the Intra-Allerød Cold Period, and the Younger Dryas. Brine formation increased from circa 8200 years B.P. reaching periodic maxima during the last 4000 years B.P. in response to the unstable climate. Maximum brine production correlates with the Dark Ages Cold Period circa 1500–1100 years B.P. and the Little Ice Age circa 600–100 years B.P. Lower production correlates with the Roman Warm Period circa 2500–2000 years B.P. and the Medieval Warm Period circa 1000–700 years B.P. Article in Journal/Newspaper Arctic Storfjorden Svalbard University of Tromsø: Munin Open Research Archive Svalbard Paleoceanography 29 10 911 929 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 VDP::Mathematics and natural science: 400::Geosciences: 450 |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 VDP::Mathematics and natural science: 400::Geosciences: 450 Rasmussen, Tine Lander Thomsen, Erik Brine formation in relation to climate changes and ice retreat during the last 15,000 years in Storfjorden, Svalbard, 76–78°N |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 VDP::Mathematics and natural science: 400::Geosciences: 450 |
description |
Storfjorden, Svalbard, is an area of intense brine formation. The brine is cold, dense, rich in oxygen and CO2, and has reduced pH. Storfjorden is unique because it contains well-preserved agglutinated foraminifera dating back to the beginning of the last deglaciation. We have investigated the distribution of calcareous and agglutinated benthic foraminifera, benthic oxygen and carbon isotopes, calcium carbonate, total organic carbon, and ice-rafted debris in five cores from Storfjorden comprising the Holocene and the deglaciation. The purpose of the study is to reconstruct brine formation in the past under different climate scenarios. The data indicate that in Storfjorden the ratio of agglutinated to calcareous benthic foraminifera can be taken as a measure of the strength of brine formation. The foraminiferal data, which are supported by stable isotopes, degree of fragmentation, and geochemical parameters, signify that brine formation intensified during cold periods and weakened during warm periods. During the deglaciation, increased brine flow coincides with the Older Dryas, the Intra-Allerød Cold Period, and the Younger Dryas. Brine formation increased from circa 8200 years B.P. reaching periodic maxima during the last 4000 years B.P. in response to the unstable climate. Maximum brine production correlates with the Dark Ages Cold Period circa 1500–1100 years B.P. and the Little Ice Age circa 600–100 years B.P. Lower production correlates with the Roman Warm Period circa 2500–2000 years B.P. and the Medieval Warm Period circa 1000–700 years B.P. |
format |
Article in Journal/Newspaper |
author |
Rasmussen, Tine Lander Thomsen, Erik |
author_facet |
Rasmussen, Tine Lander Thomsen, Erik |
author_sort |
Rasmussen, Tine Lander |
title |
Brine formation in relation to climate changes and ice retreat during the last 15,000 years in Storfjorden, Svalbard, 76–78°N |
title_short |
Brine formation in relation to climate changes and ice retreat during the last 15,000 years in Storfjorden, Svalbard, 76–78°N |
title_full |
Brine formation in relation to climate changes and ice retreat during the last 15,000 years in Storfjorden, Svalbard, 76–78°N |
title_fullStr |
Brine formation in relation to climate changes and ice retreat during the last 15,000 years in Storfjorden, Svalbard, 76–78°N |
title_full_unstemmed |
Brine formation in relation to climate changes and ice retreat during the last 15,000 years in Storfjorden, Svalbard, 76–78°N |
title_sort |
brine formation in relation to climate changes and ice retreat during the last 15,000 years in storfjorden, svalbard, 76–78°n |
publisher |
American Geophysical Union |
publishDate |
2014 |
url |
https://hdl.handle.net/10037/12103 https://doi.org/10.1002/2014PA002643 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
Arctic Storfjorden Svalbard |
genre_facet |
Arctic Storfjorden Svalbard |
op_relation |
Paleoceanography info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE Rasmussen, T.L.R., Thomsen, E. Brine formation in relation to climate changes and ice retreat during the last 15,000 years in Storfjorden, Svalbard, 76–78°N. Paleoceanography. 2014;29(10):911-929 FRIDAID 1161724 doi:10.1002/2014PA002643 0883-8305 1944-9186 https://hdl.handle.net/10037/12103 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1002/2014PA002643 |
container_title |
Paleoceanography |
container_volume |
29 |
container_issue |
10 |
container_start_page |
911 |
op_container_end_page |
929 |
_version_ |
1766300187275296768 |