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以岩性相近但气候和土地利用迥异的两个具有高分辨率水文水化学自动监测数据的岩溶水系统——湿润亚热带以土质坡地为主的岩溶水系统(贵州普定后寨岩溶水系统)和高寒冰雪覆盖下以石质坡地为主的岩溶水系统(瑞士阿尔卑斯山区的Tsanfleuron冰川岩溶水系统)作为研究对象,进行岩溶作用碳汇强度对比研究。结果发现,后寨岩溶水系统的[HCO3-]年均值为222mg/L,而Tsanfleuron冰川岩溶水系统的[HCO3-]年均值仅为131mg/L,表明湿润亚热带岩溶水系统具有较高的[HCO3-]特征。然而,湿润亚热带岩溶水系统的碳汇强度(60.82t/(km2·a))与Tsanfleuron冰川岩溶水系统的碳汇强度(59.06t/(km2·a))相当。冰川岩溶水系统同样具有较高岩溶作用碳汇强度的原因主要是在全球变暖的背景下,冰川退缩加剧,冰川固体水库水量释放增多,致使冰川岩溶水系统径流量显著增加效应超出因稀释作用而产生的[HCO3-]降低效应,进而使得山岳冰川岩溶水系统的碳汇强度增大。这也暗示着随着某些冰川融化,径流量逐渐减小将使岩溶作用碳汇强度降低。
Based on two karst water systems with similar lithology, but different climate and land use, with high-resolution hydrological and chemical automatic monitoring data, the karst water system is dominated by sloping land in humid subtropical zone (Kudzu water system in Houding, Puding, Guizhou) And the karst water system dominated by snow and snow covered by stony slopes (Tsanfleuron glacier karst water system in the Swiss Alps) were studied to compare the intensity of carbon sinks in karstification. The results showed that the annual average of [HCO3-] in Houzhai karst water system was 222mg / L, while that of Tsanfleuron glacial karst water system was only 131mg / L, indicating that the humid subtropical karst water system has higher [ HCO3-] characteristics. However, the intensity of carbon sink (60.82 t / (km2 · a)) in the wet subtropical karst water system is comparable to that of the Tsanfleuron glacial karst water system (59.06 t / (km2 · a)). Glacier karst water system also has a higher intensity of karst carbon sink mainly due to the glacial retreat in the context of global warming intensified glacial solid reservoir water release increased, resulting in glacier karst water system runoff increased significantly more than due to dilution The [HCO3-] reduction effect caused by the mountain glacial karst water system increases the carbon sink intensity. This also implies that as some glaciers melt, the gradual reduction in runoff will reduce the intensity of carbon sinks from karstification.