摘要
将中国分为内流区和外流区,结合第二次土壤普查数据和51个湖泊有机碳数据,对比分析内、外流区湖泊与土壤的有机碳沉积模式.结果表明,内流区与外流区呈现不同的有机碳沉积模式,内流区湖泊有机碳埋藏速率和土壤有机碳密度同步变化,呈现流域汇集型的有机碳沉积模式;东北部和西南部外流区土壤有机碳含量和密度较高,湖泊有机碳含量与沉积速率均较低,呈现原地沉积型的有机碳沉积模式;中东部外流区土壤有机碳数据低于其他区域,湖泊有机碳数据远高于其他区域,结合该区域密集的人类活动,将其有机碳沉积模式定义为人类活动影响型.中国内流区与外流区湖泊与土壤有机碳沉积模式差异较大,且外流区内部受不同因素影响呈现原地沉积型和人类活动影响型两种有机碳沉积模式.
Based on the data from China's second soil census and the organic carbon(OC) data of 51lakes,the OC sedimentary models of lakes and soils were analyzed by dividing China into closed basins and outflow areas.The results showed that there were different OC deposition patterns in closed basins and outflow areas.The burial rate of OC in lakes and the density of soil OC in closed basins changed synchronously,and OC deposition pattern of the basin aggregation type was presented;the content and density of soil OC in the outflow areas of the northeast and southwest were high while the content and deposition rate of lake OC were low,showing an in-situ deposition pattern of OC;the soil OC data in outflow areas of the central and eastern region was lower than that in other regions while the lake OC data was much higher than that in other regions.In combination with the intensive human activities in those regions,OC deposition model thereof was defined as the type of human activities.To sum up,the deposition patterns of OC in lakes and soils in closed basins and outflow areas are quite different,and the inner part of the outflow area is affected by different factors,showing two types of OC deposition patterns:in-situ deposition and human activities.
作者
薛雅欣
李育
徐玲梅
段俊杰
高铭君
张占森
XUE Ya-xin;LI Yu;XU Ling-mei;DUAN Jun-jie;GAO Ming-jun;ZHANG Zhan-sen(College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China;Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China)
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2023年第6期740-748,共9页
Journal of Lanzhou University(Natural Sciences)
基金
国家自然科学基金项目(42077415,42371159)
第二次青藏高原综合科学考察研究项目(2019QZKK0202)
中国科学院战略性先导科技专项项目(XDA20100102)
111计划项目(BP0618001)。
关键词
有机碳
内流区
外流区
沉积模式
湖泊与土壤
organic carbon
closed basin
outflow area
sedimentary model
lake and soil
作者简介
通信联系人:李育(1981-),男,甘肃兰州人,教授,博士,e-mail:liyu@lzu.edu.cn,研究方向为气候变化.
