The radiolarian fauna during the Younger Dryas–Holocene transition in Andfjorden, northern Norway
We report on the changing radiolarian faunas from the Younger Dryas (ca.12.9 calibrated thousands of years BP [cal. Ky BP]) and into the Holocene (ca. 10.3 cal. Ky BP) in the core JM99-1200 from Andfjorden, northern Norway. Temperature reconstructions using both the Q-mode factor analysis and modern...
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Norwegian Polar Institute
2019
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ftdoajarticles:oai:doaj.org/article:d1dae13a4c4a46bd8fce2e9f8544e43f 2023-05-15T13:25:31+02:00 The radiolarian fauna during the Younger Dryas–Holocene transition in Andfjorden, northern Norway Kjell R. Bjørklund Svetlana B. Kruglikova Øyvind Hammer 2019-12-01T00:00:00Z https://doi.org/10.33265/polar.v38.3444 https://doaj.org/article/d1dae13a4c4a46bd8fce2e9f8544e43f EN eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/3444/9586 https://doaj.org/toc/1751-8369 1751-8369 doi:10.33265/polar.v38.3444 https://doaj.org/article/d1dae13a4c4a46bd8fce2e9f8544e43f Polar Research, Vol 38, Iss 0, Pp 1-16 (2019) palaeoclimate biostratigraphy age models preboreal oscillation transfer functions Environmental sciences GE1-350 Oceanography GC1-1581 article 2019 ftdoajarticles https://doi.org/10.33265/polar.v38.3444 2022-12-30T21:58:28Z We report on the changing radiolarian faunas from the Younger Dryas (ca.12.9 calibrated thousands of years BP [cal. Ky BP]) and into the Holocene (ca. 10.3 cal. Ky BP) in the core JM99-1200 from Andfjorden, northern Norway. Temperature reconstructions using both the Q-mode factor analysis and modern analogue technique methods show stable, cold temperatures below ca. 410 cm core depth, followed by abrupt warming into a relatively stable Holocene temperature regime. Age-depth modelling with three different methods gives an age of ca. 11.9–12.0 cal. Ky BP at this core depth, clearly older than the Younger Dryas–Holocene transition at ca. 11.65 cal. Ky BP according to ice core chronology. Considering that the age models may be insufficiently informed in an interval without radiometric dates, it is possible that the base of the Holocene is indeed at 410 cm, as indicated by the radiolarian and other core data. Such a change in the chronology would have implications for previously published work on the JM99-1200 core. Alternatively, the abrupt warming in Andfjorden predated the Younger Dryas–Holocene transition by a few hundred years. A distinct cold pulse at ca. 315–335 cm, or 11.4–11.5 cal. Ky BP is interpreted as the Preboreal Oscillation. The Preboreal Oscillation has not previously been detected in temperature curves based on planktic foraminifera in the same core, indicating that Radiolaria may be a more sensitive temperature indicator in this region. Article in Journal/Newspaper Andfjorden ice core Northern Norway Polar Research Directory of Open Access Journals: DOAJ Articles Norway Andfjorden ENVELOPE(16.333,16.333,69.167,69.167) Polar Research 38 0 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
palaeoclimate biostratigraphy age models preboreal oscillation transfer functions Environmental sciences GE1-350 Oceanography GC1-1581 |
spellingShingle |
palaeoclimate biostratigraphy age models preboreal oscillation transfer functions Environmental sciences GE1-350 Oceanography GC1-1581 Kjell R. Bjørklund Svetlana B. Kruglikova Øyvind Hammer The radiolarian fauna during the Younger Dryas–Holocene transition in Andfjorden, northern Norway |
topic_facet |
palaeoclimate biostratigraphy age models preboreal oscillation transfer functions Environmental sciences GE1-350 Oceanography GC1-1581 |
description |
We report on the changing radiolarian faunas from the Younger Dryas (ca.12.9 calibrated thousands of years BP [cal. Ky BP]) and into the Holocene (ca. 10.3 cal. Ky BP) in the core JM99-1200 from Andfjorden, northern Norway. Temperature reconstructions using both the Q-mode factor analysis and modern analogue technique methods show stable, cold temperatures below ca. 410 cm core depth, followed by abrupt warming into a relatively stable Holocene temperature regime. Age-depth modelling with three different methods gives an age of ca. 11.9–12.0 cal. Ky BP at this core depth, clearly older than the Younger Dryas–Holocene transition at ca. 11.65 cal. Ky BP according to ice core chronology. Considering that the age models may be insufficiently informed in an interval without radiometric dates, it is possible that the base of the Holocene is indeed at 410 cm, as indicated by the radiolarian and other core data. Such a change in the chronology would have implications for previously published work on the JM99-1200 core. Alternatively, the abrupt warming in Andfjorden predated the Younger Dryas–Holocene transition by a few hundred years. A distinct cold pulse at ca. 315–335 cm, or 11.4–11.5 cal. Ky BP is interpreted as the Preboreal Oscillation. The Preboreal Oscillation has not previously been detected in temperature curves based on planktic foraminifera in the same core, indicating that Radiolaria may be a more sensitive temperature indicator in this region. |
format |
Article in Journal/Newspaper |
author |
Kjell R. Bjørklund Svetlana B. Kruglikova Øyvind Hammer |
author_facet |
Kjell R. Bjørklund Svetlana B. Kruglikova Øyvind Hammer |
author_sort |
Kjell R. Bjørklund |
title |
The radiolarian fauna during the Younger Dryas–Holocene transition in Andfjorden, northern Norway |
title_short |
The radiolarian fauna during the Younger Dryas–Holocene transition in Andfjorden, northern Norway |
title_full |
The radiolarian fauna during the Younger Dryas–Holocene transition in Andfjorden, northern Norway |
title_fullStr |
The radiolarian fauna during the Younger Dryas–Holocene transition in Andfjorden, northern Norway |
title_full_unstemmed |
The radiolarian fauna during the Younger Dryas–Holocene transition in Andfjorden, northern Norway |
title_sort |
radiolarian fauna during the younger dryas–holocene transition in andfjorden, northern norway |
publisher |
Norwegian Polar Institute |
publishDate |
2019 |
url |
https://doi.org/10.33265/polar.v38.3444 https://doaj.org/article/d1dae13a4c4a46bd8fce2e9f8544e43f |
long_lat |
ENVELOPE(16.333,16.333,69.167,69.167) |
geographic |
Norway Andfjorden |
geographic_facet |
Norway Andfjorden |
genre |
Andfjorden ice core Northern Norway Polar Research |
genre_facet |
Andfjorden ice core Northern Norway Polar Research |
op_source |
Polar Research, Vol 38, Iss 0, Pp 1-16 (2019) |
op_relation |
https://polarresearch.net/index.php/polar/article/view/3444/9586 https://doaj.org/toc/1751-8369 1751-8369 doi:10.33265/polar.v38.3444 https://doaj.org/article/d1dae13a4c4a46bd8fce2e9f8544e43f |
op_doi |
https://doi.org/10.33265/polar.v38.3444 |
container_title |
Polar Research |
container_volume |
38 |
container_issue |
0 |
_version_ |
1766385844309983232 |