Abrupt shift toward cooler condition in the earliest 20th century detected in a 165 year coral record from Ishigaki Island, southwestern Japan

Abrupt shift toward cooler condition in the earliest 20th century detected in a 165 year coral record from Ishigaki Island, southwestern Japan
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日本西南部石垣岛 165 年的珊瑚记录中发现,早在 20 世纪,珊瑚条件突然转向凉爽

DOI:
10.1029/2010gl043451
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发表时间:
2010
影响因子:
5.2
通讯作者:
H
H
中科院分区:
地球科学1区
文献类型:
--
作者:
Mishima;M.;Suzuki;A.;Nagao;M.;Ishimura;T.;Inoue;M.;Kawahata;H

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我们分析了日本西南部石垣岛165年的δ 18 O珊瑚记录,并将我们的结果与观测到的海面温度,以及东亚冬季风和厄尔尼诺南方涛动进行了比较。自19世纪90年代以来,珊瑚骨骼δ 18 O波动与其他可用的SST信息一致。珊瑚的δ 18 O数据表明,在1900-1905年期间,珊瑚的温度突然向较冷的状态转变,这与1902年在日本观测到的极端寒冷的冬季气温相一致。珊瑚Sr/Ca数据也支持冷事件。西伯利亚高压的发展可能加强了EAWM在这个时候,与活跃的热对流在热带和弱西风带。这种冷却也可能与世纪早期小笠原群岛的海洋表面淡化有关。因此,在世纪的头几年里,在西北副热带太平洋上,有几种现象是独特的耦合。
We analyzed a 165 yearδ18O coral record from Ishigaki Island, southwestern Japan, and compared our results with observed sea surface temperatures, as well as with the East Asian winter monsoon and El Niño Southern Oscillation. Coral skeletalδ18O fluctuations were consistent with other available SST information since the 1890s. The coralδ18O data indicated abrupt shift toward cooler condition during 1900–1905, consistent with the extremely cold winter air temperatures observed in Japan in 1902. The cold event was also supported by coral Sr/Ca data. Development of the Siberian High may have intensified the EAWM at this time, in association with active heat convection in the tropics and weak westerlies. This cooling may also have been related to surface ocean freshening in the Ogasawara Islands in the early 20th century. Thus, several phenomena were uniquely coupled during the first few years of the 20th century in the northwestern subtropical Pacific.
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