岩溶碳汇对气候和土地利用变化的响应研究--以湖北省恩施州为例  

Study on the Response of Karst Carbon Sinks to Climate and Land Use Changes--A Case Study Based on Enshi Prefecture in Hubei Province

作　　者：李万阳 宋鄂平 潘炳臣 梁小龙 李陈 王钰鑫 LI Wanyang;SONG Eping;PAN Bingchen;LIANG Xiaolong;LI Chen;WANG Yuxin(Hubei Key Laboratory of Biological Resources Protection and Utilization,Enshi 445000,China;College of Forestry and Horticulture,Hubei Minzu University,Enshi 445000,China)

机构地区：[1]生物资源保护与利用湖北省重点实验室,湖北恩施445000 [2]湖北民族大学林学园艺学院,湖北恩施445000

出　　处：《湖北民族大学学报（自然科学版）》2024年第3期419-425,434,共8页Journal of Hubei Minzu University:Natural Science Edition

基　　金：湖北民族大学校内科研项目(XN2320)。

摘　　要：为研究气候和土地利用变化情况下岩溶碳汇通量的演变趋势及响应,基于CO_(2)通量全球侵蚀模型(global erosion model for CO_(2)fluxes,GEM-CO_(2))计算2000—2020年恩施州岩溶碳汇通量的时空动态变化,并分析气候和土地利用变化对岩溶碳汇通量的影响。结果表明:2000—2020年恩施州岩溶碳汇通量时空变化差异明显,在时间上呈现稳步上升的趋势,在空间上呈现“南高北低”的分布格局,岩溶碳汇通量多年平均值为3.87×10^(5) t/a;降水量与岩溶碳汇通量的变化为正相关,蒸发量与岩溶碳汇通量的变化为负相关;岩溶碳汇通量对不同时期土地利用变化的响应有所不同。该研究证实了碳酸盐岩风化作用所消耗的CO_(2)参与了全球碳循环,同时可为土地合理利用和固碳增汇措施的实施提供科学依据。In order to study the trend and response of karst carbon sink fluxes under climate and land use changes,the spatial and temporal dynamic variation of karst carbon sink fluxes in Enshi Prefecture from 2000 to 2020 were calculated based on the global erosion model for CO_(2)fluxes(GEM-CO_(2)),and the impacts of climate and land use changes on karst carbon sink fluxes were analyzed.The results showed that:the spatial and temporal variation of karst carbon fluxes in Enshi Prefecture from 2000 to 2020 were conspicuous,with a steady upward trend in time and a distribution pattern of“high in the south and low in the north”in space,and the multi-year average value of karst carbon sink fluxes was 3.87×10^(5) t/a;the precipitation showed a positive correlation with the change of karst carbon sink fluxes,and evaporation showed a negative correlation with the change of karst carbon sink fluxes;the response of karst carbon sink fluxes to land use change in different periods was different.This study was reflected that CO_(2)consumed by carbonate rock weathering was involved in the global carbon cycle,and provided scientific basis for the implementation of rational land use and carbon sequestration and sink enhancement measures.

关 键 词：岩溶作用 碳汇 GEM-CO 2 土地利用 碳酸盐岩 时空演变 恩施州 

分 类 号：P642.252[天文地球—工程地质学]