川东北宋家洞石笋氧碳同位素及锶含量突变分析  

Abrupt Change Analyses of Oxygen,Carbon Isotope Values and Sr Contents in a Stalagmite Retrieved from Songjia Cave,NE Sichuan

作　　者：曹益瑰[1] 李娇[1] 汤静[2] 

机构地区：[1]湖南师范大学资源与环境科学学院,湖南长沙410081 [2]华南师范大学地理科学学院,广东广州510631

出　　处：《安庆师范学院学报（自然科学版）》2012年第4期88-90,103,共4页Journal of Anqing Teachers College(Natural Science Edition)

摘　　要：通过对宋家洞石笋SJ3的氧碳同位素及锶含量进行Mann-Kendall test突变分析,得出以下结论:(1)氧同位素值记录了末次冰盛期向Heinrich Event 1时期的转变;(2)碳同位素值和锶含量记录了由H1冷期向BФlling-AllerФd暖期的转变;(3)碳同位素值和锶含量指示了在19.8～15.3ka时当地的东亚夏季风和冬季风呈正相关关系,在15.3～14.8 ka呈负相关关系,表明石笋SJ3记录了古气候环境的冷干、暖湿变化,且不同气候指标对环境变化的敏感度不同。We analyze the abrupt changes of oxygen, carbon isotope values and Sr contents in stalagmite S J3 retrieved from Songjia Cave, Central China. Some conclusions are given below ： （ 1 ） Oxygen isotope values record the transition from Last Glacial Maximum to Heinrich Event One period;（2） Carbon isotope values record the transition from H1 cold period to BoilingAllerod warm period ; （3） The correlation between Carbon isotope values and Sr contents indicate that the local East Asian summer monsoon were in - phase with the winter monsoon during 19.8 - 15.3ka while out of phase during 15.3 - 14.8ka. It＇ s obvious that stalagmite SJ3 records the palaeoclimate changes between colddry and warmwet conditions while different climate proxies were dissimilar in sensitivities with regard to climate changes.

关 键 词：氧碳同位素 锶含量 突变 Mann—Kendall test 

分 类 号：X142[环境科学与工程—环境科学]