Sea surface temperature across the Subarctic North Pacific and marginal seas through the past 20,000 years: A paleoceanographic synthesis

Type Article
Date 2020-10
Language English
Author(s) Davis Catherine V.1, Myhre Sarah E.2, 3, Deutsch Curtis3, Caissie Beth4, Praetorius Summer5, Borreggine Marisa3, Thunell Robert1
Affiliation(s) 1 : School of Earth, Oceans, And the Environment, University of South Carolina, 701 Sumter St, Columbia, SC, USA
2 : Future of Ice Initiative, University of Washington, 1492 NE Boat St., Seattle, WA, 98105, USA
3 : School of Oceanography, University of Washington, 1503 NE Boat St., Seattle, WA, 98105, USA
4 : Department of Geological and Atmospheric Sciences, Iowa State University, 253 Science, Ames, IA, 50011, USA
5 : U.S. Geological Survey, 345 Middlefield Rd, Menlo Park, CA, 94025, USA
Source Quaternary Science Reviews (0277-3791) (Elsevier BV), 2020-10 , Vol. 246 , P. 106519 (13p.)
DOI 10.1016/j.quascirev.2020.106519
Keyword(s) Sea surface temperature, North Pacific, Bering sea, Sea of Okhotsk, Deglaciation
Abstract

Deglacial sea surface conditions in the subarctic North Pacific and marginal seas are the subject of increasing interest in paleoceanography. However, a cohesive picture of near-surface oceanography from which to compare inter and intra-regional variability through the last deglaciation is lacking. We present a synthesis of sea surface temperature covering the open North Pacific and its marginal seas, spanning the past 20 ka using proxy records from foraminiferal calcite (δ18O and Mg/Ca) and coccolithophore alkenones (Uk’37). Sea surface temperature proxies tend to be in agreement through the Holocene, though Uk’37 records are often interpreted as warmer than adjacent δ18O or Mg/Ca records during the Last Glacial Maximum and early deglaciation. In the Sea of Okhotsk, Holocene discrepancies between δ18O and Uk’37 may be the result of changes in near-surface stratification. We find that sea-surface warming occurred prior to the onset of the Bølling-Allerød (14.7 ka) and coincident with the onset of the Holocene (11.7 ka) in much of the North Pacific and Bering Sea. Proxy records also show a cold reversal roughly synchronous with the Younger Dryas (12.9–11.7 ka). After the onset of the Holocene, the influence of an intensified warm Kuroshio Current is evident at higher latitudes in the Western Pacific, and an east-west seesaw in sea surface temperature, likely driven by changes in the strength of the North Pacific Gyre, characterizes the open interglacial North Pacific.

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How to cite 

Davis Catherine V., Myhre Sarah E., Deutsch Curtis, Caissie Beth, Praetorius Summer, Borreggine Marisa, Thunell Robert (2020). Sea surface temperature across the Subarctic North Pacific and marginal seas through the past 20,000 years: A paleoceanographic synthesis. Quaternary Science Reviews, 246, 106519 (13p.). Publisher's official version : https://doi.org/10.1016/j.quascirev.2020.106519 , Open Access version : https://archimer.ifremer.fr/doc/00646/75814/