石笋氧同位素指示东亚季风大尺度环流特征

详细信息

收稿日期: 2009-03-18

修回日期: 2009-07-05

刊出日期: 2009-09-30

CHARACTERISTICS OF LARGESCALE CIRCULATION OF EAST ASIAN MONSOON INDICATED BY OXYGEN ISOTOPE OF STALAGMITES

- Key Laboratory of Biogeology and Environmental Geology, Ministry of Education, China University of Geosciences, Wuhan 430074

Received Date: 18 March 2009

Revised Date: 05 July 2009

Publish Date: 30 September 2009

摘要: 利用湖北清江和尚洞的两支具有精确年代的年层石笋，建立了20世纪逐年的石笋氧同位素序列，讨论东亚季风石笋氧同位素的气候指示意义。与现代气象观测资料对比，发现近100年来和尚洞石笋 δ18O 与当地年总降水量和年均温度的相关性并不显著，但与指示东亚季风环流特征的西太平洋副热带高压指数(WPSH)以及相对应的太平洋年代际振荡指数(PDO)相关性好。在年际和年代际尺度上，当太平洋年代际振荡处于正(负)相位时，副热带高压加强(减弱)，石笋的 δ18O 相对偏正(负)。因而，石笋 δ18O 反映了东亚季风大尺度环流特征。
- 洞穴石笋 /
- 氧同位素 /
- 东亚季风 /
- 西太平洋副热带高压 /
- 太平洋年代际振荡指数
Abstract: By using of two annually laminated stalagmites with accurate chronology，an oxygen isotope profile with an annual resolution of the 20th Century was established to assess the climate implication of stalagmite δ18O in the East Asian Monsoon area.
- cave stalagmite /
- oxygen isotope /
- East Asian monsoon /
- Western Pacific Subtopic High /
- Pacific Decadal Oscillation