Sea surface temperature variability and sea-ice extent in the subarctic northwest Pacific during the past 15,000 years
作者： Lars Max , Jan-Rainer Riethdorf , Ralf Tiedemann , Maria Smirnova , Lester Lembke-Jene
DOI: 10.1029/2012PA002292
关键词: North Atlantic Deep Water 、 Deglaciation 、 Oceanography 、 Climatology 、 Geology 、 Pacific decadal oscillation 、 Holocene 、 Alkenone 、 Sea surface temperature 、 Thermohaline circulation 、 Sea ice
摘要: Past changes in North Pacific sea surface temperatures and sea-ice conditions are proposed to play a crucial role deglacial climate development ocean circulation but less well known than from the Atlantic. Here, we present new alkenone-based temperature records subarctic northwest its marginal seas (Bering Sea of Okhotsk) for time interval last 15 kyr, indicating millennial-scale fluctuations similar short-term oscillations Greenland ice-core records. distribution derived relative percentage specific diatom groups qualitative assessment IP25 biomarker related diatoms. The variability extent matches fluctuations. These suggest linkage variations Atlantic meridional overturning close atmospheric coupling between During Holocene is marked by complex trends, which do not support hypothesis seesaw Pacific. Key Points: - Millennial-scale SST during kyr - Changes fluctuations - Middle late SSTs show no clear trend
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