中国喀斯特关键带岩石风化碳汇评估及其生态服务功能（英文）

编号 zgly0001584084

文献类型 期刊论文

文献题名 中国喀斯特关键带岩石风化碳汇评估及其生态服务功能（英文）

作者 宋贤威  高扬  温学发  郭大立  于贵瑞  何念鹏  张进忠 

作者单位 CollegeofResourcesandEnvironment  SouthwestUniversity  KeyLaboratoryofEcosystemNetworkObservationandModeling  InstituteofGeographicSciencesandNaturalResourcesResearch  CAS  UniversityofChineseAcademyofSciences 

母体文献 Journal of Geographical Sciences 

年卷期 2017年08期

年份 2017 

分类号 P512.1 

关键词 karst  karstcriticalzone  carbonsink  carbonsequestrationrate  China 

文摘内容 The karst critical zone is an essential component of the carbon（C） pool, constituting the global C cycle. It is referred to as one of the residual land sink that remains largely indeterminate. Karst area（2.2×107 km2） comprises 15% of the world’s land area, and karst area comprises 3.44×106 km2 of area in China. Due to the complexity of karst structure and its considerable heterogeneity, C sequestration rate estimations contain large inaccuracies, especially in relation to the different methods used in calculations. Therefore, we reevaluated rock weathering-related C sink estimations in China(approximately 4.74 Tg C yr–1), which we calibrated from previous studies. Additionally, we stipulated that more comprehensive research on rock-soil-biology-atmosphere continuum C migration is essential to better understand C conversion mechanisms based on uncertainty analyses of C sink estimations. Moreover, we stressed that a collective confirmation of chemical methods and simulated models through a combined research effort could at least partially eliminate such uncertainty. Furthermore, integrated C cycling research need a long-term observation of the carbon flux of multi-interfaces. The enhanced capacity of ecosystem C and soil C pools remains an effective way of increasing C sink. Karst ecosystem health and security is crucial to human social development, accordingly, it is critical that we understand thresholds or potential C sink capacities in karst critical zones now and in the future.