Out of the woods: Driftwood insights into Holocene pan-Arctic sea ice dynamics
The collation of 913 driftwood samples from across the western Arctic, with spatiotemporal distribution and available provenance data, enabled the production of a high-resolution proxy-based reconstruction of Holocene Arctic Ocean surface current and sea ice dynamics. Regionally bounded, driftwood-b...
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| Format: | Journal article |
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American Geophysical Union
2017
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| _version_ | 1797106012382035968 |
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| author | Hole, GM Macias-Fauria, M |
| author_facet | Hole, GM Macias-Fauria, M |
| author_sort | Hole, GM |
| collection | OXFORD |
| description | The collation of 913 driftwood samples from across the western Arctic, with spatiotemporal distribution and available provenance data, enabled the production of a high-resolution proxy-based reconstruction of Holocene Arctic Ocean surface current and sea ice dynamics. Regionally bounded, driftwood-based sea ice reconstructions studies suggest spatiotemporally complex past Arctic sea ice extent and movement; however, a large-scale compilation of Holocene Arctic driftwood has not previously been developed. Sparse driftwood in the early Holocene (≥8.2 cal ka B.P.) deglacial period was followed by increased driftwood deposition in the warmer mid-Holocene (8.2–4.2 cal ka B.P.); characterized by an enhanced Transpolar Drift (TPD) ∼7 cal ka B.P., leading to sea ice loss through the Fram Strait. Driftwood incursion peaks show spatial E-W progression from the Eurasian Archipelagos to Greenland and the Canadian Arctic Archipelago, suggesting a progressive shift in the orientation of the TPD on centennial-millennial time scales and intermediate phases in the Arctic Oscillation. Late Holocene cooling (≤4.2 cal ka B.P.) is indicated by increased influx of probably North American Picea via a strengthened Beaufort Gyre (BG) which enhanced sea ice recirculation, starting in the western Arctic and progressing eastward. In recent millennia ( < 2 cal ka B.P.), a more variable driftwood record alternates between BG and TPD dominance on centennial time scales. To further constrain a spatiotemporal reconstruction of variations in Holocene ocean current and sea ice dynamics, a more definitive determination of driftwood provenance is recommended to build upon the current framework, such as through radiogenic isotope tracing and aDNA analysis. |
| first_indexed | 2024-03-07T06:55:37Z |
| format | Journal article |
| id | oxford-uuid:fe11c97a-0178-472c-b2cf-9202dca64e24 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T06:55:37Z |
| publishDate | 2017 |
| publisher | American Geophysical Union |
| record_format | dspace |
| spelling | oxford-uuid:fe11c97a-0178-472c-b2cf-9202dca64e242022-03-27T13:33:18ZOut of the woods: Driftwood insights into Holocene pan-Arctic sea ice dynamicsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:fe11c97a-0178-472c-b2cf-9202dca64e24Symplectic Elements at OxfordAmerican Geophysical Union2017Hole, GMMacias-Fauria, MThe collation of 913 driftwood samples from across the western Arctic, with spatiotemporal distribution and available provenance data, enabled the production of a high-resolution proxy-based reconstruction of Holocene Arctic Ocean surface current and sea ice dynamics. Regionally bounded, driftwood-based sea ice reconstructions studies suggest spatiotemporally complex past Arctic sea ice extent and movement; however, a large-scale compilation of Holocene Arctic driftwood has not previously been developed. Sparse driftwood in the early Holocene (≥8.2 cal ka B.P.) deglacial period was followed by increased driftwood deposition in the warmer mid-Holocene (8.2–4.2 cal ka B.P.); characterized by an enhanced Transpolar Drift (TPD) ∼7 cal ka B.P., leading to sea ice loss through the Fram Strait. Driftwood incursion peaks show spatial E-W progression from the Eurasian Archipelagos to Greenland and the Canadian Arctic Archipelago, suggesting a progressive shift in the orientation of the TPD on centennial-millennial time scales and intermediate phases in the Arctic Oscillation. Late Holocene cooling (≤4.2 cal ka B.P.) is indicated by increased influx of probably North American Picea via a strengthened Beaufort Gyre (BG) which enhanced sea ice recirculation, starting in the western Arctic and progressing eastward. In recent millennia ( < 2 cal ka B.P.), a more variable driftwood record alternates between BG and TPD dominance on centennial time scales. To further constrain a spatiotemporal reconstruction of variations in Holocene ocean current and sea ice dynamics, a more definitive determination of driftwood provenance is recommended to build upon the current framework, such as through radiogenic isotope tracing and aDNA analysis. |
| spellingShingle | Hole, GM Macias-Fauria, M Out of the woods: Driftwood insights into Holocene pan-Arctic sea ice dynamics |
| title | Out of the woods: Driftwood insights into Holocene pan-Arctic sea ice dynamics |
| title_full | Out of the woods: Driftwood insights into Holocene pan-Arctic sea ice dynamics |
| title_fullStr | Out of the woods: Driftwood insights into Holocene pan-Arctic sea ice dynamics |
| title_full_unstemmed | Out of the woods: Driftwood insights into Holocene pan-Arctic sea ice dynamics |
| title_short | Out of the woods: Driftwood insights into Holocene pan-Arctic sea ice dynamics |
| title_sort | out of the woods driftwood insights into holocene pan arctic sea ice dynamics |
| work_keys_str_mv | AT holegm outofthewoodsdriftwoodinsightsintoholocenepanarcticseaicedynamics AT maciasfauriam outofthewoodsdriftwoodinsightsintoholocenepanarcticseaicedynamics |