2592~1225aB.P.湖北神农架石笋氧同位素记录及区域气候意义

doi:10.13249/j.cnki.sgs.2010.06.950

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

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. 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. 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/Abstract

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

张春霞, 张茂恒, 李偏, 孔兴功, 朱正坤, 姜修洋, 汪永进. 2592~1225aB.P.湖北神农架石笋氧同位素记录及区域气候意义[J]. 地理科学, 2010, 30(6): 950-954.

ZHANG Chun-xia, ZHANG Maoheng, LI Pian, KONG Xing-gong, ZHU Zhengkun, JIANG Xiu-yang, WAMG Yong-jin. Stalagmite δ¹⁸O Record 2592-1225 yr B.P. from Mt. Shennongjia and Its Regional Climate Significance[J]. SCIENTIA GEOGRAPHICA SINICA, 2010, 30(6): 950-954.

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2592~1225aB.P.湖北神农架石笋氧同位素记录及区域气候意义

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

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