Paleoceanography of the Gulf of Alaska during the past 15,000 years: Results from diatoms, silicoflagellates, and geochemistry
作者： John A. Barron , David Bukry , Walter E. Dean , Jason A. Addison , Bruce Finney
DOI: 10.1016/J.MARMICRO.2009.04.006
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摘要: article i nfo abruptly during the Bolling-Allerod (Bo-Al) warm interval (14.7-12.9 cal ka), declined Younger Dryas (YD) cold (12.9 to 11.7 kyr BP), and rose again earliest Holocene. At this site, record after ~11 BP is dominated by oceanic diatoms silicoflagellates, with geochemical proxies displaying more subtle variation. Cores EW0408-66JC in Yakobi Sea Valley near Cross Sound EW0408-11JC Gulf of Esquibel contain an expanded, composite along southeast Alaskan margin. Core 66JC contains a detailed Bo-Al YD. Diatoms silicoflagellates indicate that coastal upwelling biosiliceous productivity were strong but ice-related increased abundance YD, indicating cooler, less productive waters.
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