岩溶作用时间尺度与碳汇稳定性

从碳酸盐溶蚀快速动力学过程、岩溶动力系统的开放性、环境敏感性和生物参与性等方面分析了岩溶作用过程的时间尺度及其碳汇稳定性,指出岩溶碳循环是一种兼具不同时间尺度的特殊地质作用过程,因水生植物和土地利用变化的影响,碳汇效应显著且相对稳定,仍对现今大气CO2减排有重要意义.为更好地估算岩溶碳汇潜力,在加强高精度自动化监测的同时,需要考虑外源水、水生植物及土地利用变化等因素.

Time-scale of karst processes and the carbon sink stability

This paper discussed the time scale of karst processes and the carbon sink stability from fast kinetics of carbonate dissolution, open property of karst dynamic system and its environmental sensitivity and the involvement of organisms. It showed that karst processes may be particular geologic processes that involved in global carbon cycle over various time scales. Influenced by aquatic vegetation and land-use change, carbon sink resulted from carbonate rock dissolution is remarkable and quite stable, and is significant to the reduction of atmospheric CO2 nowadays. More high resolution data-log monitoring sites should be established for better estimation of carbon sink. It also indicated that the impact of allogenic water in the catchment, aquatic vegetation and land-use change must be taken into account for the estimating method improvement.