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Pleistocene Surface Water Temperatures in the Benguela Upwelling Area

机译:Benguela上升区的更新世地表水温度

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Analysis of carbonate microfossils (planktonic foraminifers and nannoplankton) in the DSDP Hole 362 Quaternary section made it possible to specify its zonal subdivision (almost all zones of Gartner's high-resolution nannofossil scale are recognized), establish depositional environments, and restore past surface water temperatures. The latter appeared to be several degrees lower than their present-day values, which is evident from the anomalously high share of the subpolar species Neogloboquadrina pachyderma sin. that constitutes 97% of the fossil assemblage in Lower Pleistocene sediments. It is shown that the Benguela upwelling existed throughout the entire Pleistocene, being less intense in the Late Pleistocene and Holocene.
机译:通过对DSDP 362孔第四纪剖面中碳酸盐微化石(浮游有孔虫和纳米浮游生物)的分析,可以指定其区域细分(几乎可以识别Gartner高分辨率纳米化石规模的所有区域),建立沉积环境,并恢复过去的地表水温。后者似乎比目前的值低了几度,这从亚极物种新球藻(Neogloboquadrina pachyderma sin)的异常高份额中可以看出。占下更新世沉积物中化石组合的97%。结果表明,本格拉上升流遍及整个更新世,在晚更新世和全新世中强度较小。

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