Multiproxy evidence of the Neoglacial expansion of Atlantic Water to eastern Svalbard
The main goal of this study is to reconstruct the paleoceanographic development of Storfjorden during the Neoglacial (∼4 cal ka BP). Storfjorden is one of the most important brine factories in the European Arctic and is responsible for deepwater production. Moreover, it is a climate-sensitive area i...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2020
|
Subjects: | |
Online Access: | https://doi.org/10.5194/cp-16-487-2020 https://www.clim-past.net/16/487/2020/cp-16-487-2020.pdf https://doaj.org/article/5e5f8cdc6603490ea7301cf713ebddd2 |
id |
fttriple:oai:gotriple.eu:oai:doaj.org/article:5e5f8cdc6603490ea7301cf713ebddd2 |
---|---|
record_format |
openpolar |
spelling |
fttriple:oai:gotriple.eu:oai:doaj.org/article:5e5f8cdc6603490ea7301cf713ebddd2 2023-05-15T15:02:10+02:00 Multiproxy evidence of the Neoglacial expansion of Atlantic Water to eastern Svalbard J. Pawłowska M. Łącka M. Kucharska J. Pawlowski M. Zajączkowski 2020-03-01 https://doi.org/10.5194/cp-16-487-2020 https://www.clim-past.net/16/487/2020/cp-16-487-2020.pdf https://doaj.org/article/5e5f8cdc6603490ea7301cf713ebddd2 en eng Copernicus Publications doi:10.5194/cp-16-487-2020 1814-9324 1814-9332 https://www.clim-past.net/16/487/2020/cp-16-487-2020.pdf https://doaj.org/article/5e5f8cdc6603490ea7301cf713ebddd2 undefined Climate of the Past, Vol 16, Pp 487-501 (2020) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2020 fttriple https://doi.org/10.5194/cp-16-487-2020 2023-01-22T19:12:40Z The main goal of this study is to reconstruct the paleoceanographic development of Storfjorden during the Neoglacial (∼4 cal ka BP). Storfjorden is one of the most important brine factories in the European Arctic and is responsible for deepwater production. Moreover, it is a climate-sensitive area influenced by two contrasting water masses: warm and saline Atlantic Water (AW) and cold and fresh Arctic Water (ArW). Herein, a multiproxy approach was applied to provide evidence for existing interactions between the inflow of AW and sea ice coverage, which are the major drivers of environmental changes in Storfjorden. The sedimentary and microfossil records indicate that a major reorganization of oceanographic conditions in Storfjorden occurred at ∼2.7 cal ka BP. The cold conditions and the less pronounced presence of AW in Storfjorden during the early phase of the Neoglacial were the prerequisite conditions for the formation of extensive sea ice cover. The period after ∼2.7 cal ka BP was characterized by alternating short-term cooling and warming intervals. Warming was associated with pulsed inflows of AW and sea ice melting that stimulated phytoplankton blooms and organic matter supply to the bottom. The cold phases were characterized by heavy and densely packed sea ice, resulting in decreased productivity. The ancient environmental DNA (aDNA) records of foraminifera and diatoms support the occurrence of the major pulses of AW (∼2.3 and ∼1.7 cal ka BP) and the variations in sea ice cover. The episodes of enhanced AW inflow were marked by an increase in the percentage of DNA sequences of monothalamous foraminifera associated with the presence of fresh phytodetritus. Cold and less productive intervals were marked by an increased proportion of monothalamous taxa known only from environmental sequencing. The diatom aDNA record indicates that primary production was continuous during the Neoglacial, regardless of the sea ice conditions. However, the colder periods were characterized by the presence of diatom taxa ... Article in Journal/Newspaper Arctic Foraminifera* Phytoplankton Sea ice Storfjorden Svalbard Unknown Arctic Svalbard Climate of the Past 16 2 487 501 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
envir geo |
spellingShingle |
envir geo J. Pawłowska M. Łącka M. Kucharska J. Pawlowski M. Zajączkowski Multiproxy evidence of the Neoglacial expansion of Atlantic Water to eastern Svalbard |
topic_facet |
envir geo |
description |
The main goal of this study is to reconstruct the paleoceanographic development of Storfjorden during the Neoglacial (∼4 cal ka BP). Storfjorden is one of the most important brine factories in the European Arctic and is responsible for deepwater production. Moreover, it is a climate-sensitive area influenced by two contrasting water masses: warm and saline Atlantic Water (AW) and cold and fresh Arctic Water (ArW). Herein, a multiproxy approach was applied to provide evidence for existing interactions between the inflow of AW and sea ice coverage, which are the major drivers of environmental changes in Storfjorden. The sedimentary and microfossil records indicate that a major reorganization of oceanographic conditions in Storfjorden occurred at ∼2.7 cal ka BP. The cold conditions and the less pronounced presence of AW in Storfjorden during the early phase of the Neoglacial were the prerequisite conditions for the formation of extensive sea ice cover. The period after ∼2.7 cal ka BP was characterized by alternating short-term cooling and warming intervals. Warming was associated with pulsed inflows of AW and sea ice melting that stimulated phytoplankton blooms and organic matter supply to the bottom. The cold phases were characterized by heavy and densely packed sea ice, resulting in decreased productivity. The ancient environmental DNA (aDNA) records of foraminifera and diatoms support the occurrence of the major pulses of AW (∼2.3 and ∼1.7 cal ka BP) and the variations in sea ice cover. The episodes of enhanced AW inflow were marked by an increase in the percentage of DNA sequences of monothalamous foraminifera associated with the presence of fresh phytodetritus. Cold and less productive intervals were marked by an increased proportion of monothalamous taxa known only from environmental sequencing. The diatom aDNA record indicates that primary production was continuous during the Neoglacial, regardless of the sea ice conditions. However, the colder periods were characterized by the presence of diatom taxa ... |
format |
Article in Journal/Newspaper |
author |
J. Pawłowska M. Łącka M. Kucharska J. Pawlowski M. Zajączkowski |
author_facet |
J. Pawłowska M. Łącka M. Kucharska J. Pawlowski M. Zajączkowski |
author_sort |
J. Pawłowska |
title |
Multiproxy evidence of the Neoglacial expansion of Atlantic Water to eastern Svalbard |
title_short |
Multiproxy evidence of the Neoglacial expansion of Atlantic Water to eastern Svalbard |
title_full |
Multiproxy evidence of the Neoglacial expansion of Atlantic Water to eastern Svalbard |
title_fullStr |
Multiproxy evidence of the Neoglacial expansion of Atlantic Water to eastern Svalbard |
title_full_unstemmed |
Multiproxy evidence of the Neoglacial expansion of Atlantic Water to eastern Svalbard |
title_sort |
multiproxy evidence of the neoglacial expansion of atlantic water to eastern svalbard |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/cp-16-487-2020 https://www.clim-past.net/16/487/2020/cp-16-487-2020.pdf https://doaj.org/article/5e5f8cdc6603490ea7301cf713ebddd2 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Foraminifera* Phytoplankton Sea ice Storfjorden Svalbard |
genre_facet |
Arctic Foraminifera* Phytoplankton Sea ice Storfjorden Svalbard |
op_source |
Climate of the Past, Vol 16, Pp 487-501 (2020) |
op_relation |
doi:10.5194/cp-16-487-2020 1814-9324 1814-9332 https://www.clim-past.net/16/487/2020/cp-16-487-2020.pdf https://doaj.org/article/5e5f8cdc6603490ea7301cf713ebddd2 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-16-487-2020 |
container_title |
Climate of the Past |
container_volume |
16 |
container_issue |
2 |
container_start_page |
487 |
op_container_end_page |
501 |
_version_ |
1766334147451682816 |