North Pacific response to millennial-scale changes in ocean circulation over the last 60 kyr

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doi: 10.1029/2000PA000545
Author(s): Kiefer, T.; Sarnthein, M.; Erlenkeuser, Helmut; Grootes, P. M.; Roberts, A. P.
Author Affiliation(s): Primary:
Universität Kiel, Institut für Geowissenschaften, Kiel, Federal Republic of Germany
University of Southampton, United Kingdom
Volume Title: Paleoceanography
Source: Paleoceanography, 16(2), p.179-189. Publisher: American Geophysical Union, Washington, DC, United States. ISSN: 0883-8305 CODEN: POCGEP
Note: In English. 72 refs.; illus., incl. 1 table, sketch map
Summary: Foraminifera-based sea surface temperature estimates in the northwest Pacific (Ocean Drilling Program Site 883; 51°N) varied by 4°C on millennial timescales over the last 60,000 calendar (cal) years, with the most prominent amplitudes during marine isotope stage 3. Age control is based on benthic δ18O records, 14C ages, and on geomagnetic intensity variations at Site 883 tuned to the North Atlantic paleointensity stack since 75 ka (NAPIS-75), in turn, tied to the Greenland Ice Sheet Project 2 (GISP2) ice core chronology. On the basis of this tuning, northwest Pacific warm phases parallel Greenland cold stadials and viceversa. This contrasts with atmospheric heat transfer, expected to produce quasi-coeval signals across the Northern Hemisphere. The antiphasing may instead stem from variations in global thermohaline circulation. At its North Pacific terminus in the subarctic gyre, any slowdown or shutoff of North Atlantic Deep Water formation during Dansgaard-Oeschger stadials led to a turnoff or reduction of the upwelling of cold Pacific deepwater and thus, to striking, instantaneous, short-term warmings of surface water. Copyright 2001 by the American Geophysical Union.
Year of Publication: 2001
Research Program: ODP Ocean Drilling Program
Key Words: 24 Surficial Geology, Quaternary Geology; Cenozoic; Climate change; Foraminifera; GISP2; Glacial environment; Invertebrata; Leg 145; Microfossils; North Pacific; ODP Site 883; Ocean Drilling Program; Ocean circulation; Pacific Ocean; Paleo-oceanography; Paleoclimatology; Pleistocene; Protista; Quaternary; Sea-surface temperature
Coordinates: N511155 N511155 E1674607 E1674607
Record ID: 2003035883
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