摘要
精确地计算岩溶碳汇量,有助于全球碳循环模型理论的进一步完善。因而在实际工作中,排泄量和HCO3-质量浓度是岩溶碳汇监测评价的主要指标。选取贵州茂兰国家级自然保护区的板寨河流域为研究对象,基于自动化在线监测技术,获取了该域排泄量及水化学指标的实时监测数据。对比分析暴雨期、无或弱降水期以及枯水期等不同降水条件下HCO3-质量浓度、流域排泄量及岩溶碳汇量的动态过程曲线,发现流域排泄量与岩溶碳汇量呈良好的正相关关系,而与HCO3-质量浓度则呈负相关。这说明相比地下水中HCO3-浓度,流域排泄量才是影响岩溶碳汇的主控因素,同时也说明水循环方式是影响岩溶碳汇的主控因子,即流域排泄量愈大,流域内岩溶作用对大气CO2形成的'汇'值愈大。
The karst process is important composition of global carbon cycle because it can take-up CO2 from atmosphere.To calculate karst carbon sequestration（Kcs） is useful to complete the theory of global carbon cycle.By the karst dynamic system theory,the Kcs is controlled by groundwater discharge and HCO-3 mass concentration.The Banzhai River catchment,located in Maolan National Nature Reserve of Guizhou,was chosen as the study area.By the auto-monitoring technique,the discharge and water chemistry data of Banzhai River catchment were obtained.Based on the analysis of relationship between discharge,HCO-3 concentration and karst carbon sequestration under different precipitation conditions including storm period,no/weak precipitation period and dry season.Kcs has positive correlation with discharge and negative correlation with HCO-3 concentration.It shows that the discharge of catchment is main factor of Kcs rather than HCO-3 concentration.The larger discharge of karst catchment,the larger Kcs from atmosphere.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2011年第5期1542-1547,共6页
Journal of Jilin University：Earth Science Edition
基金
国家自然科学基金项目(40802063)
中国地质调查局科研项目(1212371011028)
关键词
岩溶碳汇
降水
地下水
板寨河流域
karst carbon sequestration
precipitation
groundwater
Baizhai River catchment
