Stable oxygen isotope records of corals and a sclerosponge in the Western Pacific warm pool
Stable oxygen isotope records of corals and a sclerosponge in the Western Pacific warm pool
复制标题
西太平洋暖池珊瑚和硬海绵的稳定氧同位素记录
DOI：
10.1007/s00338-009-0576-7
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发表时间：
2010
期刊：
影响因子：
3.5
通讯作者：
Grottoli, A. G.
中科院分区：
文献类型：
--
作者：
Wu, H. C.;Grottoli, A. G.
本文分析了位于西太平洋暖池的帕劳共和国（7°16′n, 134°31′e）的两个新的10年porites lobatacacoral岩心和一个先前研究的多年年sclerospongeAcanthocheatetes井的稳定氧同位素特征（δ18O）的高分辨率测量结果，并建立了逐月插值时间序列记录。在El Niño南方涛动（ENSO）的强烈影响下，珊瑚和硬海绵均忠实地记录了海表盐度（SSS）的年际变化，尽管采集深度和生长速率存在显著差异。珊瑚骨骼δ18O与SSS的强烈关系，而不是与海表温度或降水的关系，证实了先前的发现，即帕劳地区地表水的变化是由与ENSO相关的年际时间尺度上的水团平流驱动的。利用较长的硬化剂海绵记录扩展较短的珊瑚代理记录，以验证enso诱导的SSS变率在较长时间尺度上的稳定性。
High-resolution measurements of the stable oxygen isotopic signature (δ18O) of two new 10-yearPorites lobatacoral cores and one previously studied multi-decadal sclerospongeAcanthocheatetes wellsifrom the Republic of Palau (7°16′N, 134°31′E) located in the Western Pacific warm pool were analyzed and monthly interpolated time-series records developed. Despite significant differences in collection depth and growth rates, both coral and sclerosponge faithfully recorded the interannual changes of sea surface salinity (SSS) driven by the strong influence of the El Niño Southern Oscillation (ENSO). The strong relationship of coral skeletal δ18O with SSS, but not sea surface temperature or precipitation, confirms previous findings that changes in Palau regional surface water are driven by the advection of water masses into the area over interannual timescales associated with ENSO. Opportunities exist for the expansion of short coral proxy records with longer sclerosponge records to verify the stability of ENSO-induced SSS variability over longer timescales.