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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ftjpolarres:oai:journals.openacademia.net:article/3444 2024-09-09T19:00:22+00:00 The radiolarian fauna during the Younger Dryas–Holocene transition in Andfjorden, northern Norway Bjørklund, Kjell R. Kruglikova, Svetlana B. Hammer, Øyvind 2019-12-04 application/pdf text/html application/epub+zip application/xml application/vnd.openxmlformats-officedocument.spreadsheetml.sheet https://polarresearch.net/index.php/polar/article/view/3444 https://doi.org/10.33265/polar.v38.3444 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/3444/9586 https://polarresearch.net/index.php/polar/article/view/3444/9587 https://polarresearch.net/index.php/polar/article/view/3444/9589 https://polarresearch.net/index.php/polar/article/view/3444/9590 https://polarresearch.net/index.php/polar/article/view/3444/9435 https://polarresearch.net/index.php/polar/article/view/3444 doi:10.33265/polar.v38.3444 Polar Research; Vol 38 (2019) 1751-8369 Palaeoclimate biostratigraphy age models Preboreal Oscillation transfer functions info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2019 ftjpolarres https://doi.org/10.33265/polar.v38.3444 2024-06-20T23:33:17Z 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 Polar Research Andfjorden ENVELOPE(16.333,16.333,69.167,69.167) Norway Polar Research 38 0 |
institution |
Open Polar |
collection |
Polar Research |
op_collection_id |
ftjpolarres |
language |
English |
topic |
Palaeoclimate biostratigraphy age models Preboreal Oscillation transfer functions |
spellingShingle |
Palaeoclimate biostratigraphy age models Preboreal Oscillation transfer functions Bjørklund, Kjell R. Kruglikova, Svetlana B. Hammer, Øyvind The radiolarian fauna during the Younger Dryas–Holocene transition in Andfjorden, northern Norway |
topic_facet |
Palaeoclimate biostratigraphy age models Preboreal Oscillation transfer functions |
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 |
Bjørklund, Kjell R. Kruglikova, Svetlana B. Hammer, Øyvind |
author_facet |
Bjørklund, Kjell R. Kruglikova, Svetlana B. Hammer, Øyvind |
author_sort |
Bjørklund, Kjell R. |
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://polarresearch.net/index.php/polar/article/view/3444 https://doi.org/10.33265/polar.v38.3444 |
long_lat |
ENVELOPE(16.333,16.333,69.167,69.167) |
geographic |
Andfjorden Norway |
geographic_facet |
Andfjorden Norway |
genre |
Andfjorden ice core Northern Norway Polar Research |
genre_facet |
Andfjorden ice core Northern Norway Polar Research |
op_source |
Polar Research; Vol 38 (2019) 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/3444/9586 https://polarresearch.net/index.php/polar/article/view/3444/9587 https://polarresearch.net/index.php/polar/article/view/3444/9589 https://polarresearch.net/index.php/polar/article/view/3444/9590 https://polarresearch.net/index.php/polar/article/view/3444/9435 https://polarresearch.net/index.php/polar/article/view/3444 doi:10.33265/polar.v38.3444 |
op_doi |
https://doi.org/10.33265/polar.v38.3444 |
container_title |
Polar Research |
container_volume |
38 |
container_issue |
0 |
_version_ |
1809938835213123584 |