亚热带典型农业流域碳平衡估算研究——以金井河流域为例  

Carbon balance estimation in a typical agricultural catchment in the subtropical region:A case study of the Jinjing River Catchment

作　　者：姜文倩 李思琪 王美慧 李勇[2] 沈健林[1] 刘新亮[1] 盛良学[1] 宫殿林 朱奇宏[1] 吴金水[1] JIANG Wen-qian;LI Si-qi;WANG Mei-hui;LI Yong;SHEN Jian-lin;LIU Xin-liang;SHENG Liang-xue;GONG Dian-lin;ZHU Qi-hong;WU Jin-shui(Key Laboratory of Agro-ecological Processes in Subtropical Region,Changsha Research Station for Agricultural and Environmental Monitoring,Institute of Subtropical Agriculture,Chinese Academy of Sciences,Changsha,Hunan 410125,China;Institute of Atmospheric Physics Chinese Academy of Sciences,Beijing 100029,China;University of Chinese Academy of Sciences,Beijing 100049,China;State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex,Shanghai Academy of Environment Sciences,Shanghai 200233,China;Key Laboratory of Environmental Change and Resource Use in Beibu Gulf,Ministry of Education,Institute of Geography and Oceanography,Nanning Normal University,Nanning,Guangxi 530001,China)

机构地区：[1]中国科学院亚热带农业生态研究所,中国科学院长沙农业环境观测研究站,湖南长沙410125 [2]中国科学院大气物理研究所,北京100029 [3]中国科学院大学,北京100049 [4]国家环境保护城市大气复合污染成因与防治重点实验室,上海市环境科学研究院,上海200233 [5]南宁师范大学北部湾环境演变与资源利用教育部重点实验室,地理与海洋研究院,广西南宁530001

出　　处：《农业现代化研究》2024年第2期306-315,共10页Research of Agricultural Modernization

基　　金：国家重点研发计划项目(2022YFE0209200);国家自然科学基金委员会与联合国环境规划署合作研究项目(42161144002);国家环境保护城市大气复合污染成因与防治重点实验室开放基金项目(SEPAir-2022080590);广西高校中青年教师(科研)基础能力提升项目(2022KY0375)。

摘　　要：度量流域碳中和程度的年度温室气体净排放量,是二氧化碳(CO_(2))、甲烷、氧化亚氮等温室气体净排放量的CO_(2)当量总和,其中的CO_(2)净排放量大小由流域碳平衡计量。因此,为实现在2030年之前碳排放量达到峰值和2060年前“碳中和”的宏伟目标(即“双碳”目标),以流域为尺度单元全面了解其碳平衡情况至关重要。本研究基于走访调查数据、MODIS数据集以及前人研究结果,利用政府间气候变化专门委员会(IPCC)温室气体清单指南提供的参考方法,对湖南省长沙县农业小流域——金井河流域的碳平衡进行估算研究。结果显示,2011—2020年该流域的碳吸收量(以纯碳计)范围为1.289万~1.982万t/a,其中森林、茶园和农田生态系统碳吸收量分别占总吸收量的83.4%、2.6%和14.0%。流域的碳排放量范围为0.373万~1.342万t/a,主要排放贡献源是交通运输和工业生产,分别占总碳排放量的57.1%和28.8%。金井河流域碳平衡指数小于1,表明该流域为碳汇。本研究为以流域尺度的碳源汇清查提供了典型案例,并为研究区域制定“双碳”目标的实施路径提供了有益参考。Annual net greenhouse gas emissions,which measure the degree of carbon neutrality of a catchment,are the sum of the carbon dioxide(CO_(2))equivalent of net emissions of CO_(2),methane,nitrous oxide and other greenhouse gases,of which the magnitude of ne tO_(2)emissions indicates the catchmen tarbon balance.Therefore,in order to achieve China's ambitious goal of peaking carbon emissions by 2030 and become“carbon neutral”by 2060(the“double carbon”goal),it is important to have a comprehensive understanding of the carbon balance of each catchment.This paper estimates the carbon balance of Jinjing River Catchment in Changsha County,Hunan Province,based on survey data,MODIS datasets and previous studies,and using the reference method provided by the Intergovernmental Panel on Climate Change(IPCC)Greenhouse Gas Inventory Guidelines.The results showed that total annual carbon sequestration(in terms of pure carbon)in the catchment ranged from 12.89 thousand to 19.82 thousand t/a from 2011 to 2020,with forest,tea paddy and paddy field ecosystems carbon uptake accounting for 83.4%,2.6%,and 14.0%of the total uptake,respectively.The total carbon emissions in the catchment range from 3.73 thousand to 13.42 thousand t/a with the main emission contributors being transportation and industrial production,which account for 57.1%and 28.8%of the total carbon emission from 2011 to 2020,respectively.The carbon balance index of the Jinjing River Catchment was less than 1,indicating that the catchment is an atmospheric carbon sink.This study provides a typical case for the inventory of carbon sources and sinks at the catchment scale,and provides a useful reference for the study area in formulating the implementation path of the“dual carbon”target.

关 键 词：碳平衡 碳源 碳汇 碳排放 碳吸收 金井河流域 

分 类 号：X321[环境科学与工程—环境工程]