Variability of PDO identified by a last 300-year stalagmite δ18O record in Southwest China
Variability of PDO identified by a last 300-year stalagmite δ18O record in Southwest China
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中国西南近300年石笋δ18O记录识别的PDO变异性
DOI：
10.1016/j.quascirev.2021.106947
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发表时间：
2021-06
影响因子：
4
通讯作者：
Xiao Jule
中科院分区：
文献类型：
--
作者：
Wang Xuefeng;Duan Wuhui;Tan Ming;Cai Binggui;Zhao Jingyao;Sha Lijuan;Ning Youfeng;Cheng Hai;Wang Lisheng;Ma Zhibang;Edwards R. Lawrence;Xiao Jule
石笋氧同位素（δ 18 O）记录已被广泛用于表征亚洲季风的变化。在中国西南地区，尽管石笋δ 18 O通常被认为是降水的替代物，但它仍然是一个有争议的话题。本文报道了两个云南石笋δ 18 O高精度测年记录，时间跨度为1710-2003 AD。石笋δ 18 O与当地季风降水无相关性，但与太平洋年代际振荡指数（PDO）呈显著正相关。这表明，中国西南地区石笋δ 18 O很可能是受与PDO有关的大气环流的影响，通过上游亏损机制实现的。暖（冷）PDO期间，印度降水偏少，瑞利蒸馏作用减弱，向中国西南输送的水汽δ 18 O负偏少（偏多），导致石笋δ 18 O负偏少（偏多）。因此，中国西南地区石笋δ 18 O值适合重建PDO变化。值得注意的是，其他因素如厄尔尼诺-南方涛动（ENSO）或海表温度（SST）也可能影响中国西南地区石笋δ 18 O，它们之间的关系有待进一步研究。
Stalagmite oxygen isotope (δ18O) record has been widely used in characterizing Asian Monsoon variations. In southwest (SW) China, although the stalagmite δ18O was usually suggested as a precipitation proxy, it remains a subject of debate. Here we present two replicated, high-precise-dated stalagmite δ18O records for the interval 1710–2003 AD from Yunnan province, SW China. The stalagmite δ18O shows no correlation with the local monsoon precipitation, but a significantly positive correlation with the Pacific Decadal Oscillation (PDO) index. It demonstrates that the stalagmite δ18O in SW China is most likely influenced by the atmospheric circulation associated with the PDO through the upstream depletion mechanism. During the warm (cold) PDO period, the deficit rainfall over India would make the δ18O of water vapor transporting to SW China less (more) negative due to the weaker Rayleigh distillation process, which would lead to the less (more) negative stalagmite δ18O. Consequently, the stalagmite δ18O in SW China is suitable to reconstruct the PDO variations. It is important to note that the other factors, such as El Niño–Southern Oscillation (ENSO) or sea surface temperature (SST) also possibly affect the stalagmite δ18O in SW China, and the relationship between them requires further studies.
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影响因子：
2.2
作者：
Jiangning Yin;Hong-chun Li;Wei Tang;Zhijun Wang;H. Mii;Yushi Lin
通讯作者：
Jiangning Yin;Hong-chun Li;Wei Tang;Zhijun Wang;H. Mii;Yushi Lin
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影响因子：
4
作者：
R. Lawrence Edwards;Hai Cheng;Dianbing Liu;Xinggong Kong
通讯作者：
Xinggong Kong
影响因子：
5.2
作者：
S. Sarkar;Ramesh P. Singh;M. Kafatos
通讯作者：
S. Sarkar;Ramesh P. Singh;M. Kafatos
影响因子：
56.9
作者：
D. Yuan;Hai Cheng;R. Edwards;C. A. Dykoski;M. J. Kelly;Meiliang Zhang;Jiaming Qing;Yushi Lin
通讯作者：
D. Yuan;Hai Cheng;R. Edwards;C. A. Dykoski;M. J. Kelly;Meiliang Zhang;Jiaming Qing;Yushi Lin
影响因子：
3.9
作者：
Xiaohong Liu;W. An;K. Treydte;X. Shao;S. Leavitt;S. Hou;Tuo Chen;Weizheng Sun;D. Qin
通讯作者：
Xiaohong Liu;W. An;K. Treydte;X. Shao;S. Leavitt;S. Hou;Tuo Chen;Weizheng Sun;D. Qin