Changes in sediment provenance and ocean circulation on the northern slope of the Bering Sea since the last deglaciation
作者： Rujian Wang , Yechen Sun , Li Wu , Wenshen Xiao , Yijing Wu
DOI: 10.1016/J.MARGEO.2021.106492
关键词:
摘要: Abstract Changes in water circulation the Bering Sea have profoundly impacted biological productivity, carbon cycle and global ocean circulation, especially from last deglaciation to Holocene. Grain size clay mineral composition were investigated core ARC6-B10, collected northern slope, order reveal changes sediment provenance since late (~13.7 ka). The results highlight sea level atmospheric as primary controls on variations grain mineralogy. Deglacial rise deepened passages along Aleutian Arc, enhanced inflow of North Pacific that strengthened Sea, receded coastline. These increased supply smectite-enriched sediments Islands site. A temporary reduction smectite an increase illite chlorite contents during Preboreal period correspond opening Strait; this is attributed rapid which resulted resuspension shelf. During mid- Holocene, when stabilized, Low (AL) a major factor modulating circulation. weakened AL mid-Holocene intensified northward Slope Current flow through Strait, while AL, with expanded ice cover Holocene may flow.
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