【摘要】 对国内外有关洞穴次生碳酸盐沉积（石笋）稳定碳同位素值(δ¹³C)的研究成果进行了梳理和归纳总结,介绍了影响石笋δ¹³C值变化的因素（如植被（包括植被类型和生物量效应）、土壤过程、大气CO₂、岩溶地下水水文（包括地下水的水动力条件、水-岩相互作用和先期碳酸盐沉积等））,同时介绍了一些模型研究中对影响石笋δ¹³C值的某些具体气候环境因素（如滴水快慢或时间间隔、通风强度、地下水流动路径等）进行的定量评估.综合1992—2017年对洞穴石笋δ¹³C值的研究成果,指出洞穴内滴水的CO₂去气作用可能是影响石笋δ¹³C值变化的关键机制,建议在今后的研究中对此给予高度关注.更多还原

【Abstract】 The investigations into speleothem stable carbon isotope( δ¹³C) are summarized. The factors influencing speleothem δ¹³C,such as changes in vegetation（ including C3 plant to C4 plant ratio and/or bio-productivity）,soil processes,atmosphere CO₂,karst grounder hydrology（ including hydrodynamic of karst groundwater,waterrock interaction,prior calcite precipitation,etc.）,are introduced one by one. Meanwhile some model simulations,which were used to quantitatively estimate the effects on speleothem δ¹³C of specific factors such as dripping interval,cave ventilation intensity,flowing path and distance of groundwater and so on,are also introduced. According to the results of existing researches on speleothem δ¹³C,it is suggested that CO₂ degassing of dripping water may be a key factor influencing speleothem δ¹³C values and deserves more attention in future studies.更多还原