Temperature:δ18O relationships of planktonic foraminifera collected from surface waters
Temperature:δ18O relationships of planktonic foraminifera collected from surface waters
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DOI：
10.1016/s0031-0182(03)00633-3
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发表时间：
2003-12
期刊：
影响因子：
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通讯作者：
S. Mulitza;D. Boltovskoy;B. Donner;H. Meggers;A. Paul;G. Wefer
中科院分区：
文献类型：
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作者：
S. Mulitza;D. Boltovskoy;B. Donner;H. Meggers;A. Paul;G. Wefer
用于古海洋学重建的同位素古温度方程大多来自培养实验或碳酸钙的无机沉淀。为了在现代海洋中检验这些方程，我们测量了从大西洋和南大洋表层沃茨采集的浮游有孔虫（Globigerinoides ruber、Globigerinoides sacculifer、Globigerina bulloides和Neogloboquadrina pachyderma）的氧同位素组成，并添加了太平洋、印度洋和北冰洋已发表的浮游生物拖曳数据。建立了温度：δ18O关系的种特异性回归方程。ruber，G. sacculifer和G.在统计学上是无法区分的。导出了G. sacculifer和G. bulloides同意从实验室实验中获得的关系，其中这些物种在接近现代表面沃茨的pH值培养。由N. pachyderma有一个显着较低的斜率和偏移比其他三个物种，但产生的回归方程，几乎是相同的表底栖有孔虫Cibicides SP。我们的工作对浮游生物拖和泵抽样品表明，文化衍生的方程似乎更适合预测绝对δ 18 O的物种检查相比，来自无机沉淀物的方程。然而，在海洋温度范围内，我们推导出的生活物种的方程的斜率同意从无机沉淀物得到的斜率。
Most of the isotopic paleotemperature equations used for paleoceanographic reconstructions have been derived from culture experiments or inorganic precipitates of calcium carbonate. To test these equations in the modern ocean, we measured the oxygen isotope composition of planktonic foraminifera (Globigerinoides ruber, Globigerinoides sacculifer, Globigerina bulloides and Neogloboquadrina pachyderma) collected from Atlantic and Southern Ocean surface waters, and added published plankton tow data from the Pacific, Indian and Arctic Oceans. The resulting species-specific regression equations of the temperature:δ18O relationships for G. ruber, G. sacculifer and G. bulloides are statistically indistinguishable. The equations derived for G. sacculifer and G. bulloides agree with relationships obtained from laboratory experiments, in which these species were cultured at pH values close to modern surface waters. The equation derived from N. pachyderma has a significantly lower slope and offset than the other three species but produces a regression equation that is nearly identical to the one for the epifaunal benthic foraminifer Cibicides sp. Our work on plankton tow and pumped samples indicates that culture-derived equations appear to be more appropriate for predicting the absolute δ18O of the species examined compared to equations derived from inorganic precipitates. However, over the oceanic temperature range, the slopes of the equations we derive for living species agree with the slopes obtained from inorganic precipitates.