The results show that the Gibbs free energy thermodynamic theory could be used to study if the water in Karst areas could be the potential sources or sinks of CO2 in atmosphere without any limitation.

• 结果表明，从吉布斯自由能的热力学原理出发，研究岩溶水系统对大气CO2潜在源汇的贡献，没有条件约束，是一种较好的途径。