摘要
为研究石笋δ^(13)C与δ^(18)O在千年尺度随时间的变化关系,通过对比贵州石将军洞SJJ-1石笋的δ^(13)C与δ^(18)O变化发现二者之间既有相似性又不完全同步。千年尺度两者之间的相似性主要由δ^(13)C与δ^(18)O共同受太阳辐射驱动的东亚季风强度变化所致。通过中国地层孢粉反演的植被空间格局变化,碳氧同位素的滞后期与太阳辐射相对于植被变化的滞后时间一致。因植被中δ^(13)C随年降水量增加具有变轻趋势,因此,两者的不同步性更大可能是太阳辐射驱动的季风强度变化与植被变化的不同步性引起。
In order to investigate the relationship between stalagmite δ^（13）C and δ^（18）O in thousand years scale,the change of carbon and oxygen isotopes with solar irradiation intensity and the change of vegetable distribution over the same period in China are compared. It is shown that the variations of δ^（13）C and δ^（18）O have not only some similarities but also some asynchronization. By means of the change of vegetable spatial framework in Chinese strata sporopollen,the lag phase between δ^（13）C and δ^（18）O is same as the lag phase between solar irradiation intensity and the vegetation variation. The similarities between δ^（13）C and δ^（18）O mainly caused for East Asian monsoon which is driving by solar radiation. For the declined δ^（13）C value in plants following with increasing annual precipitation,so,the asynchronization of them is caused by the dyssynchrony between vegetation succession and the East Asian monsoon intensity driven by the solar irradiation intensity.
作者
薛治国
陈浒
刘子琦
许善洋
常甜
XUE Zhiguo 1,2,3, CHEN Hu2, LIU Ziqi2, XU Shanyang, CHANG Tian3(l. School of Life and Geography, Kashgar University, Kashgar 844008, Xinjiang, China; 2. Institute of Karst, Guizhou Normal University, Guiyang 550001, China; Department of Environmental Sciences and Engineering, Xi＇an Jiaotong University, Xi＇an 710049, China)
出处
《亚热带资源与环境学报》
2018年第1期75-80,共6页
Journal of Subtropical Resources and Environment
基金
国家自然科学基金(41001367)
