青藏高原崇测冰芯氯离子、硫酸根离子记录

通过对青藏高原崇测冰帽一支18．70m冰芯中Cl^-、SO4^2-离子含量变化的分析表明，20世纪90年来Cl^-、SO4^2-离子含量在波动中呈下降趋势，两种离子的周期性波动变化相似，20世纪晚期比早期和中期的波动幅度小，总体上离子含量逐渐减少与温度在波动中上升相一致，但每一次温度的升高与离子含量的下降并非一一对应。陆源物质和青藏高原上的盐湖是冰芯中Cl^-、SO4^2-离子的主要贡献者。揭示了研究地区大气成分和环境变化与气候变化的关系及亚洲粉尘在全球环境变化中的源区地位。

THE RECORD OF CL-AND SO2-4 IN THE CHANGCE ICE CORE

The following points are revealed from analyzing the variations of anions( Cl-? SO2-4) of a 18.7 m ice core in the Changce Ice Core. The concentrations of anions( Cl-? SO2-4) decreased gradually in the courses of their fluctuations for 90 years in the last century and the periodic variations were similar between the Cl- and SO2-4 ,but the variation ranges of anions in the late-term were smaller than that in the early-term and medium-term in the last century . As a whole, the gradual decrease of concentrations of anions was consistent with the increase of temperature, but they were not parallelism every time. They came from the crustal materials and saline in Tibetan Platea. It is found that there is relationship between the atmosphere ingredient and the variations of the environment and the variations of climate, and that Asia dust is a mainly source in the global environmental variations.