Potential utility of tree ring δ18O series for reconstructing precipitation records from the lower reaches of the Yangtze river, southeast China

Chenxi Xu, Junyi Ge*, Takeshi Nakatsuka, Liang Yi, Huaizhou Zheng, Masaki Sano

*この研究の対応する著者

研究成果: Article査読

34 被引用数 (Scopus)

抄録

In this study, we investigated the interannual and intraannual variabilities in the oxygen isotope composition (δ18O) preserved in the tree ring cellulose of Pinus taiwanensis in the lower reaches of the Yangtze River, southeast China, to explore its potential utility for precipitation reconstruction over the period of 1855–2013. Intraannual variations of tree ring cellulose δ18O show distinct annual cycles that are characterized by δ18O maxima in the early growth near the ring boundary and δ18O minima in the middle and late portions of the ring. Seasonal patterns of tree ring δ18O were influenced by August–October typhoons. The tree ring cellulose δ18O was measured in both young and old trees to test for the juvenile effect. The results revealed no significant differences in the mean values and long-term trends in δ18O in the old and young trees. A response analysis indicated that tree ring δ18O correlated significantly with precipitation and relative humidity between May and October, and the δ18O chronology accounted for 37.4% of the actual variation in the May–October precipitation between 1951 and 2013. The extremely dry and wet years revealed by the tree ring δ18O-based reconstructed precipitation also corresponded to actual local drought and flood events from the documentary records. Reconstructed precipitation showed significant relationship with central tropical Pacific sea surface temperature, which indicated that El Niño–Southern Oscillation (ENSO) exerted influences on May–October precipitation in the lower reaches of the Yangtze River. In addition, the relationship between ENSO and precipitation weakened between 1920 and 1940, and low variance of ENSO from 1920 to 1940 may result in the damped ENSO’s influences on precipitation in southeast China.

本文言語English
ページ(範囲)3954-3968
ページ数15
ジャーナルJournal of Geophysical Research
121
8
DOI
出版ステータスPublished - 2016
外部発表はい

ASJC Scopus subject areas

  • 地球物理学
  • 海洋学
  • 林業
  • 水圏科学
  • 生態学
  • 水の科学と技術
  • 土壌科学
  • 地球化学および岩石学
  • 地表過程
  • 大気科学
  • 宇宙惑星科学
  • 地球惑星科学(その他)
  • 古生物学

フィンガープリント

「Potential utility of tree ring δ18O series for reconstructing precipitation records from the lower reaches of the Yangtze river, southeast China」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル