A Driftwood-Based Record of Arctic Sea Ice During the Last 500 Years From Northern Svalbard Reveals Sea Ice Dynamics in the Arctic Ocean and Arctic Peripheral Seas
We present a 500-year history of naturally felled driftwood incursion to northern Svalbard, directly reflecting regional sea ice conditions and Arctic Ocean circulation. Provenance and age determinations by dendrochronology and wood anatomy provide insights into Arctic Ocean currents and climatic co...
Published in: | Journal of Geophysical Research: Oceans |
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Format: | Article in Journal/Newspaper |
Language: | English |
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American Geophysical Union
2021
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Online Access: | https://hdl.handle.net/10037/22755 https://doi.org/10.1029/2021JC017563 |
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ftunivtroemsoe:oai:munin.uit.no:10037/22755 2023-05-15T14:22:28+02:00 A Driftwood-Based Record of Arctic Sea Ice During the Last 500 Years From Northern Svalbard Reveals Sea Ice Dynamics in the Arctic Ocean and Arctic Peripheral Seas Hole, Georgia M. Rawson, Thomas Farnsworth, Wesley Randall Schomacker, Anders Ingólfsson, Ólafur Macias-Fauria, Marc 2021-09-15 https://hdl.handle.net/10037/22755 https://doi.org/10.1029/2021JC017563 eng eng American Geophysical Union Journal of Geophysical Research (JGR): Oceans info:eu-repo/grantAgreement/RCN/SSF/282643/Norway/Holocene climate history of the Femmilsjøen area, NE Spitsbergen - combining marine and terrestrial archives// Hole, Rawson, Farnsworth, Schomacker, Ingólfsson, Macias-Fauria. A Driftwood-Based Record of Arctic Sea Ice During the Last 500 Years From Northern Svalbard Reveals Sea Ice Dynamics in the Arctic Ocean and Arctic Peripheral Seas. Journal of Geophysical Research (JGR): Oceans. 2021;126(10) FRIDAID 1943381 doi:10.1029/2021JC017563 2169-9275 2169-9291 https://hdl.handle.net/10037/22755 openAccess Copyright 2021 The Author(s) VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2021 ftunivtroemsoe https://doi.org/10.1029/2021JC017563 2021-10-13T22:53:55Z We present a 500-year history of naturally felled driftwood incursion to northern Svalbard, directly reflecting regional sea ice conditions and Arctic Ocean circulation. Provenance and age determinations by dendrochronology and wood anatomy provide insights into Arctic Ocean currents and climatic conditions at a fine spatial resolution, as crossdating with reference chronologies from the circum-Arctic boreal forests enables determination of the watershed the driftwood originated from. Sample crossdating may result in a wide range of matches across the pan-boreal region, which may be biased toward regions covered by the reference chronologies. Our study considers alternate approaches to selecting probable origin sites, by weighting scores via reference chronology span and visualizing results through spatiotemporal density plots, as opposed to more basic ranking systems. As our samples come from naturally felled trees (not logged or both), the relative proportions of different provenances are used to infer past ocean current dominance. Our record indicates centennial-to decadal-scale shifts in source regions for driftwood incursion to Svalbard, aligning with Late Holocene high variability and high frequency shifts in the Transpolar Drift and Beaufort Gyre strengths and associated fluctuating climate conditions. Driftwood occurrence and provenance also track the northward ice formation shift in peripheral Arctic seas in the past century. A distinct decrease in driftwood incursion during the last 30 years matches the observed decline in pan-Arctic sea ice extent in recent decades. Our new approach successfully employs driftwood as a proxy for Arctic Ocean surface circulation and sea ice dynamics. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Sea ice Svalbard University of Tromsø: Munin Open Research Archive Arctic Arctic Ocean Svalbard Journal of Geophysical Research: Oceans 126 10 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Hole, Georgia M. Rawson, Thomas Farnsworth, Wesley Randall Schomacker, Anders Ingólfsson, Ólafur Macias-Fauria, Marc A Driftwood-Based Record of Arctic Sea Ice During the Last 500 Years From Northern Svalbard Reveals Sea Ice Dynamics in the Arctic Ocean and Arctic Peripheral Seas |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
description |
We present a 500-year history of naturally felled driftwood incursion to northern Svalbard, directly reflecting regional sea ice conditions and Arctic Ocean circulation. Provenance and age determinations by dendrochronology and wood anatomy provide insights into Arctic Ocean currents and climatic conditions at a fine spatial resolution, as crossdating with reference chronologies from the circum-Arctic boreal forests enables determination of the watershed the driftwood originated from. Sample crossdating may result in a wide range of matches across the pan-boreal region, which may be biased toward regions covered by the reference chronologies. Our study considers alternate approaches to selecting probable origin sites, by weighting scores via reference chronology span and visualizing results through spatiotemporal density plots, as opposed to more basic ranking systems. As our samples come from naturally felled trees (not logged or both), the relative proportions of different provenances are used to infer past ocean current dominance. Our record indicates centennial-to decadal-scale shifts in source regions for driftwood incursion to Svalbard, aligning with Late Holocene high variability and high frequency shifts in the Transpolar Drift and Beaufort Gyre strengths and associated fluctuating climate conditions. Driftwood occurrence and provenance also track the northward ice formation shift in peripheral Arctic seas in the past century. A distinct decrease in driftwood incursion during the last 30 years matches the observed decline in pan-Arctic sea ice extent in recent decades. Our new approach successfully employs driftwood as a proxy for Arctic Ocean surface circulation and sea ice dynamics. |
format |
Article in Journal/Newspaper |
author |
Hole, Georgia M. Rawson, Thomas Farnsworth, Wesley Randall Schomacker, Anders Ingólfsson, Ólafur Macias-Fauria, Marc |
author_facet |
Hole, Georgia M. Rawson, Thomas Farnsworth, Wesley Randall Schomacker, Anders Ingólfsson, Ólafur Macias-Fauria, Marc |
author_sort |
Hole, Georgia M. |
title |
A Driftwood-Based Record of Arctic Sea Ice During the Last 500 Years From Northern Svalbard Reveals Sea Ice Dynamics in the Arctic Ocean and Arctic Peripheral Seas |
title_short |
A Driftwood-Based Record of Arctic Sea Ice During the Last 500 Years From Northern Svalbard Reveals Sea Ice Dynamics in the Arctic Ocean and Arctic Peripheral Seas |
title_full |
A Driftwood-Based Record of Arctic Sea Ice During the Last 500 Years From Northern Svalbard Reveals Sea Ice Dynamics in the Arctic Ocean and Arctic Peripheral Seas |
title_fullStr |
A Driftwood-Based Record of Arctic Sea Ice During the Last 500 Years From Northern Svalbard Reveals Sea Ice Dynamics in the Arctic Ocean and Arctic Peripheral Seas |
title_full_unstemmed |
A Driftwood-Based Record of Arctic Sea Ice During the Last 500 Years From Northern Svalbard Reveals Sea Ice Dynamics in the Arctic Ocean and Arctic Peripheral Seas |
title_sort |
driftwood-based record of arctic sea ice during the last 500 years from northern svalbard reveals sea ice dynamics in the arctic ocean and arctic peripheral seas |
publisher |
American Geophysical Union |
publishDate |
2021 |
url |
https://hdl.handle.net/10037/22755 https://doi.org/10.1029/2021JC017563 |
geographic |
Arctic Arctic Ocean Svalbard |
geographic_facet |
Arctic Arctic Ocean Svalbard |
genre |
Arctic Arctic Arctic Ocean Sea ice Svalbard |
genre_facet |
Arctic Arctic Arctic Ocean Sea ice Svalbard |
op_relation |
Journal of Geophysical Research (JGR): Oceans info:eu-repo/grantAgreement/RCN/SSF/282643/Norway/Holocene climate history of the Femmilsjøen area, NE Spitsbergen - combining marine and terrestrial archives// Hole, Rawson, Farnsworth, Schomacker, Ingólfsson, Macias-Fauria. A Driftwood-Based Record of Arctic Sea Ice During the Last 500 Years From Northern Svalbard Reveals Sea Ice Dynamics in the Arctic Ocean and Arctic Peripheral Seas. Journal of Geophysical Research (JGR): Oceans. 2021;126(10) FRIDAID 1943381 doi:10.1029/2021JC017563 2169-9275 2169-9291 https://hdl.handle.net/10037/22755 |
op_rights |
openAccess Copyright 2021 The Author(s) |
op_doi |
https://doi.org/10.1029/2021JC017563 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
126 |
container_issue |
10 |
_version_ |
1766295050258481152 |