Postglacial marine diatom record of the Palmer Deep, Antarctic Peninsula (ODP Leg 178, Site 1098) 2. Diatom assemblages
Postglacial marine diatom record of the Palmer Deep, Antarctic Peninsula (ODP Leg 178, Site 1098) 2. Diatom assemblages
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南极半岛帕尔默深渊冰期后海洋硅藻记录（ODP Leg 178，Site 1098） 2. 硅藻组合
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
C. Sjunneskog
中科院分区：
文献类型：
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作者：
F. Taylor;C. Sjunneskog
[1]利用多元统计方法（聚类分析和方差分析），对大洋钻探178航次1098站位晚更新世至全新世硅藻组合的分布进行了描述和比较。从1098号地点确定了五个组合，它们与以前在帕尔默深海确定的气候带相关[Domack等人，2001年]。海链藻硅藻组合的特点是“冰川消退阶段”（13.2-11.0万年），并在冰川退缩期间沉积在区域末次冰期最大期结束。一个保存完好的Raculsolenia组合沉积在“气候逆转”（11.0-9.0万年），并表明季节性开放水域硅藻水华的时期。一个开放水域Fragilariopsis kerguelensis组合的特点中全新世气候最佳（9.0-3.7 ka）。在新冰期（晚全新世，<3.7 ka），气候变冷，海冰覆盖增加，风增加推断从Cocconeis组合。在气候适宜期/新冰期过渡期（4.4-1.8 ka），以Corethron criophilum为特征的纹层得以保存。这是不确定的纹层是否代表短暂的（年际）水华事件与高沉降率或已沉积在较长的时间段。
[1] The distribution of Late Pleistocene to Holocene diatom assemblages from Ocean Drilling Program (ODP) Leg 178 Site 1098 (Palmer Deep) is described and compared using multivariate statistical methods (cluster analysis and analysis of variance). Five assemblages are identified from Site 1098, which are correlated with the climatic zones identified previously in the Palmer Deep [Domack et al., 2001]. A Thalassiosira diatom assemblage characterizes the “deglaciation phase” (13.2–11.0 ka) and was deposited during glacial retreat at the end of the regional Last Glacial Maximum. A well-preserved Rhizosolenia assemblage was deposited during a “climatic reversal” (11.0–9.0 ka) and indicates periods of seasonally open water with diatom blooms. An open water Fragilariopsis kerguelensis assemblage characterizes the mid-Holocene climatic optimum (9.0–3.7 ka). In the Neoglacial (late Holocene, <3.7 ka), climatic cooling, increased sea ice cover, and increased wind are inferred from a Cocconeis assemblage. During the climatic optimum/Neoglacial transition (4.4–1.8 ka), laminae characterized by Corethron criophilum were preserved. It is uncertain whether the laminae represent short-lived (interannual) bloom events with high settling rates or have been deposited over longer time periods.