城市大气Δ^(14)CO_(2)监测中背景站和背景值的选取——以深圳市为例  

Selection of background stations and background values for urban atmosphericΔ^(14)CO_(2) monitoring:A case study of Shenzhen

作　　者：周志华 李平阳 成志能 李静[3,4] 李军[3,4] 陈多宏[5] 张涛[5] 熊向陨 马嵩 萨如拉 张干 ZHOU Zhihua;LI Pingyang;CHENG Zhineng;LI Jing;LI Jun;CHEN Duohong;ZHANG Tao;XIONG Xiangyun;MA Song;SA Rua;ZHANG Gan(Shenzhen Ecological and Environmental Monitoring Center of Guangdong Province,Shenzhen 518049,Guangdong,China;Guangdong Greater Bay Area,Change and Comprehensive Treatment of Regional Ecology and Environment,National Observation and Research Station,Shenzhen 518049,Guangdong,China;State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,Guangdong,China;CAS Center for Excellence in Deep Earth Science,Guangzhou 510640,Guangdong,China;Environmental Key Laboratory of Regional Air Quality Monitoring,Ministry of Ecology and Environment,Guangdong Ecological and Environmental Monitoring Center,Guangzhou 510308,Guangdong,China)

机构地区：[1]广东省深圳生态环境监测中心站,广东深圳518049 [2]广东大湾区区域生态环境变化与综合治理国家野外科学观测研究站,广东深圳518049 [3]中国科学院广州地球化学研究所,有机地球化学国家重点实验室,广东广州510640 [4]中国科学院深地科学卓越创新中心,广东广州510640 [5]广东省生态环境监测中心生态环境部环境保护区域空气质量监测重点实验室,广东广州510308

出　　处：《地球化学》2024年第3期309-319,共11页Geochimica

基　　金：国家自然科学基金项目(42330715、42103082);中国博士后科学基金项目(2022T150652);广东省自然科学基金项目(2022A1515011271、2022A1515011851);中国科学院特别研究助理项目;中国科学院广州地球化学研究所所长基金项目(2021SZJJ-3)联合资助。

摘　　要：城市化石源CO_(2)(CO_(2)ff)排放的可靠量化对准确理解全球和区域碳核算至关重要。虽然CO_(2)放射性C同位素(Δ^(14)CO_(2))可作为独立示踪剂对CO_(2)ff排放进行量化,但其准确性仍然受制于背景站和背景值的选取。鉴于此,本研究以深圳市为例,对比评估了距离观测站点由远及近的全球/大陆背景站、区域背景站、城市背景站和城市背景值共8个背景选项,提出了一种基于Keeling Plot(KP)右上角区域样点对背景站和背景值进行筛选和评定的新方法。结果表明,深圳市背景首选区域背景站南岭,其次为KP右上角均值。针对不同城市,可依据边界条件的复杂性、有无背景观测等情况使用不同的背景选取方法。本研究为基于Δ^(14)CO_(2)估算重点城市和区域的CO_(2)ff排放量提供了背景站和背景值选取的基本原理和实践经验。Reliable quantification of urban fossil fuel CO_(2)(CO_(2)ff)emissions is crucial for an accurate understanding of global and regional carbon accounting.Although atmosphericΔ^(14)CO_(2) can be used as an independent tracer to quantify CO_(2)ff emissions,its accuracy is still limited by selection of background stations and background values.This study evaluated eight background options,including continental/regional/urban background stations/values,to screen the best one for Shenzhen.Among these selections,a new background value called“KP-URCM”,i.e.,the mean of the observed values in the upper right corner of the Keeling Plot,was proposed.Through assessment,the Nanling regional background station is the first choice for Shenzhen,followed by the KP-URCM.For different cities,different methods of background station/value selection can be used based on the complexity of boundary conditions and the presence or absence of background observations.This study provides basic principles and practical experience for selecting background stations/values to estimate CO_(2)ff emissions in key cities and regions based on atmosphericΔ^(14)CO_(2).

关 键 词：Δ^(14)CO_(2) 化石源CO_(2) 背景站 背景值 城市 深圳 

分 类 号：P41[天文地球—大气科学及气象学]