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...
| Main Authors: | , , , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
Wiley
2021
|
| _version_ | 1797112699939717120 |
|---|---|
| author | Hole, GM Rawson, T Farnsworth, WR Schomacker, A Ingólfsson, Ó Macias-Fauria, M |
| author_facet | Hole, GM Rawson, T Farnsworth, WR Schomacker, A Ingólfsson, Ó Macias-Fauria, M |
| author_sort | Hole, GM |
| collection | OXFORD |
| 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 towards regions covered by the reference chronologies. Our study considers alternate approaches to selecting probable origin sites, by weighting scores via reference chronology span and visualising 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. |
| first_indexed | 2024-03-07T08:27:34Z |
| format | Journal article |
| id | oxford-uuid:63351c03-658f-4463-882e-52f1ae6c851c |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T08:27:34Z |
| publishDate | 2021 |
| publisher | Wiley |
| record_format | dspace |
| spelling | oxford-uuid:63351c03-658f-4463-882e-52f1ae6c851c2024-02-23T13:25:23ZA 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 seasJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:63351c03-658f-4463-882e-52f1ae6c851cEnglishSymplectic ElementsWiley2021Hole, GMRawson, TFarnsworth, WRSchomacker, AIngólfsson, ÓMacias-Fauria, MWe 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 towards regions covered by the reference chronologies. Our study considers alternate approaches to selecting probable origin sites, by weighting scores via reference chronology span and visualising 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. |
| spellingShingle | Hole, GM Rawson, T Farnsworth, WR Schomacker, A Ingólfsson, Ó Macias-Fauria, M 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 | 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_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_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 |
| work_keys_str_mv | AT holegm adriftwoodbasedrecordofarcticseaiceduringthelast500yearsfromnorthernsvalbardrevealsseaicedynamicsinthearcticoceanandarcticperipheralseas AT rawsont adriftwoodbasedrecordofarcticseaiceduringthelast500yearsfromnorthernsvalbardrevealsseaicedynamicsinthearcticoceanandarcticperipheralseas AT farnsworthwr adriftwoodbasedrecordofarcticseaiceduringthelast500yearsfromnorthernsvalbardrevealsseaicedynamicsinthearcticoceanandarcticperipheralseas AT schomackera adriftwoodbasedrecordofarcticseaiceduringthelast500yearsfromnorthernsvalbardrevealsseaicedynamicsinthearcticoceanandarcticperipheralseas AT ingolfssono adriftwoodbasedrecordofarcticseaiceduringthelast500yearsfromnorthernsvalbardrevealsseaicedynamicsinthearcticoceanandarcticperipheralseas AT maciasfauriam adriftwoodbasedrecordofarcticseaiceduringthelast500yearsfromnorthernsvalbardrevealsseaicedynamicsinthearcticoceanandarcticperipheralseas AT holegm driftwoodbasedrecordofarcticseaiceduringthelast500yearsfromnorthernsvalbardrevealsseaicedynamicsinthearcticoceanandarcticperipheralseas AT rawsont driftwoodbasedrecordofarcticseaiceduringthelast500yearsfromnorthernsvalbardrevealsseaicedynamicsinthearcticoceanandarcticperipheralseas AT farnsworthwr driftwoodbasedrecordofarcticseaiceduringthelast500yearsfromnorthernsvalbardrevealsseaicedynamicsinthearcticoceanandarcticperipheralseas AT schomackera driftwoodbasedrecordofarcticseaiceduringthelast500yearsfromnorthernsvalbardrevealsseaicedynamicsinthearcticoceanandarcticperipheralseas AT ingolfssono driftwoodbasedrecordofarcticseaiceduringthelast500yearsfromnorthernsvalbardrevealsseaicedynamicsinthearcticoceanandarcticperipheralseas AT maciasfauriam driftwoodbasedrecordofarcticseaiceduringthelast500yearsfromnorthernsvalbardrevealsseaicedynamicsinthearcticoceanandarcticperipheralseas |