Variations in the Zn/Si record over the Last Interglacial Glacial Transition
Variations in the Zn/Si record over the Last Interglacial Glacial Transition
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末次间冰期冰期过渡期间 Zn/Si 记录的变化
DOI：
10.1029/1999pa000470
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
K. Hunter
中科院分区：
文献类型：
--
作者：
M. Ellwood;K. Hunter
我们检测了硅藻结晶的锌含量，作为过去海水表面Zn2+浓度变化的指标。本文介绍了位于南大洋南大西洋板块的三个岩心样品的Zn/Si数据，这些岩心跨越了最后一次间冰期-冰期转变。Zn/Si记录的变化与地表水Zn2+浓度的变化有关。Zn2+浓度变化的来源似乎是深水上升流和环流的变化。我们排除了浮游植物生产力和风沙输入的变化作为Zn/Si记录变化的来源。同样，Zn/Si数据与沉积物中硅藻种类组成的变化或沉积物保存效应无关。锌/硅的结果不支持锌的假设。根据δ13C记录推断，浮游植物对CO2的吸收与Zn/Si记录之间没有联系。
We examined the zinc content of diatom frustules as an indicator of past changes in surface seawater Zn2+ concentration. Zn/Si data of samples from three cores located in the South Atlantic sector of the Southern Ocean spanning the last interglacial-glacial transition are presented. Changes in the Zn/Si record are linked to changes in the surface water Zn2+ concentration. The source of variation in Zn2+ concentration appears to be via changes in deep water upwelling and circulation. We rule out changes in phytoplankton productivity and aeolian dust input as a source of variation in the Zn/Si record. Likewise, the Zn/Si data are not linked to shifts in the diatom species composition of the sediment or sediment preservation effects. The Zn/Si results presented do not support the zinc hypothesis. There is no link between the uptake of CO2 by phytoplankton, as inferred from the δ13C record, and the Zn/Si record.