Interannual sea surface salinity changes in the western Pacific from 1954 to 2000 based on coral isotope analysis
Interannual sea surface salinity changes in the western Pacific from 1954 to 2000 based on coral isotope analysis
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DOI：
10.1029/2004gl022026
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发表时间：
2005-02
影响因子：
5.2
通讯作者：
H. Iijima;H. Kayanne;M. Morimoto;O. Abe
中科院分区：
文献类型：
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作者：
H. Iijima;H. Kayanne;M. Morimoto;O. Abe
西太平洋暖池(WPWP)海面盐度(SSS)的变化提供了有关厄尔尼诺南方涛动(ENSO)变化的信息，因为SSS反映了蒸发和降水之间的平衡。根据年珊瑚带的氧同位素分析，我们重建了WPWP西北边缘SSS的长期变化。估算的SSS与现场观测结果吻合较好，表明珊瑚同位素记录可以作为古盐度计。据估计，1954至2000年间的SSS在1972-73年、1982-83年和1997-98年的厄尔尼诺期间达到顶峰。这些SSS峰是由伴随WPWP东移的降水异常偏少造成的。
Changes in sea surface salinity (SSS) in the western Pacific warm pool (WPWP) provide information on the variability of the El Niño Southern Oscillation (ENSO) because SSS reflects the balance between evaporation and precipitation. We reconstructed the long‐term variability of SSS at the northwestern edge of the WPWP from oxygen isotope analysis of annual coral bands. The estimated SSS corresponded well with in situ observations, demonstrating that isotopic records from coral can be used as a paleo‐salinometer. Estimated SSS between 1954 and 2000 peaked during the El Niños of 1972–73, 1982–83, and 1997–98. These SSS peaks were caused by anomalously low precipitation accompanying the eastward shift in the WPWP.