地理科学 ›› 2010, Vol. 30 ›› Issue (6): 950-954.doi: 10.13249/j.cnki.sgs.2010.06.950

• 论文 • 上一篇    下一篇

2592~1225aB.P.湖北神农架石笋氧同位素记录及区域气候意义

张春霞1, 张茂恒1, 李偏1, 孔兴功1, 朱正坤2, 姜修洋3, 汪永进1   

  1. 1. 南京师范大学地理科学学院, 江苏 南京 210046;
    2. 江苏省交通规划设计院, 江苏 南京 211101;
    3. 福建师范大学地理科学学院, 福建 福州 350007
  • 收稿日期:2010-01-26 修回日期:2010-04-17 出版日期:2010-11-20 发布日期:2010-11-20
  • 通讯作者: 张茂恒,副教授。E-mail:zhangmaoheng@njnu.edu.cn
  • 基金资助:
    国家自然基金项目(40771009)资助。

Stalagmite δ18O Record 2592-1225 yr B.P. from Mt. Shennongjia and Its Regional Climate Significance

ZHANG Chun-xia1, ZHANG Maoheng1, LI Pian1, KONG Xing-gong1, ZHU Zhengkun2, JIANG Xiu-yang3, WAMG Yong-jin1   

  1. 1. College of Geography Science, Nanjing Normal Universisty, Nanjing, Jiangsu 210046;
    2. College of Geography Science, Fujian Normal Universisty, Fuzhou, Fujian 350007
  • Received:2010-01-26 Revised:2010-04-17 Online:2010-11-20 Published:2010-11-20

摘要: 选择处于典型季风区中国内部湖北神农架地区青天洞一支具有连续清晰年纹层发育的石笋样品(QT6),通过精确的年纹层计数,结合高精度230Th年龄,建立2 592~1 225 a B.P.期间长达1 367 a的石笋δ18O时间序列。石笋δ18O记录的17个持续时间在80 a左右的峰谷旋回,与格陵兰冰芯δ18O记录具有非常好的一一对应关系,说明在年代际尺度上石笋δ18O同样能反映区域性气候变化,可能的机制是北高纬温度的变化通过大气传输影响热带辐合带(ITCZ)的迁移,从而影响东亚季风的强弱变化。

Abstract: we present an annual layer-counted and 230Th-dated stalagmite oxygen isotope record from Qingtian Cave in Hubei Province, central China. This record provides an Asian Monsoon(AM) history during a time interval from 2592-1225 yr B.P. In the QT6 δ18O record, 17 sub-cycles with a mean duration of 80 years are identified, which correlate well with the Greenland temperature changes. This suggests that Chinese stalagmite δ18O can reflect regional climate changes at interdecadal scale. Our observations support that high-latitude temperature changes can influence the migration of Inter-tropical Convergence Zone(ITCZ) via atmospheric circulations, and then control the Asian Monsoon intensity.

中图分类号: 

  • X142.1