摘要
以中国6个典型表层岩溶系统为例,总结了它们的地球化学动态特征,并对其所反映出的环境意义作了分析。中国典型表层岩溶系统的地球化学动态特征主要表现为土壤CO_2含量的季节变化和逐年递增趋势,及地下水HCO_3^-量的CO_2效应和稀释效应。前者可能反映了全球气温升高的影响,而后者则反映出表层岩溶系统对大气CO_2具有良好的调节功能。
Taking six typical epikarst systems in China as examples, the authors summarize their features of geochemical variations, and analyze their environmental significance. It has been found that the geochemical variations in typical epikarst systems of China are characterized by the seasonal changes of CO2 content in the soil, which tend to increase yearly or monthly; and the CO2 effect and dilution effect of the HCO3- content in ground-water. The former possibly reflects the influence of global warming, while the latter shows that the epikarst system acts as a good adjuster to atmospheric CO2.
出处
《地质论评》
CAS
CSCD
北大核心
2000年第3期324-327,共4页
Geological Review
基金
国际地质对比计划项目IGCP 379--"岩溶作用与碳循环"
国家自然科学基金 (编号49632100
49703047)
国土资源部项目 (编号9501104
9806)
岩溶动力学开放研究实验室资助项目的成果
关键词
表层岩溶系统
地球化学动态
环境意义
岩溶
geochemical variation
epikarst system
environmental significance
