无锡市近地面大气CO2和CH4车载移动观测及热点识别研究
Vehicle-carried Observation and Hotspot Identification of the Near-Surface Atmospheric CO2 and CH4 Concentration in Wuxi
孙其然 1李若男 2胡凝 3郑有飞 1乔峥 1张依婷 1姬崇桂 1刘佳颖 1肖薇2
作者信息
- 1. 无锡太湖学院苏格兰学院,江苏无锡 214063
- 2. 南京信息工程大学大气环境中心,南京 210044
- 3. 中国气象局生态系统碳源汇重点开放实验室,南京 210044
- 折叠
摘要
城市是温室气体的排放热点.基于3台便携式CO2/CH4/H2O分析仪于2022年夏季观测无锡市近地面大气CO2和CH4浓度.结果表明:(1)近地面大气CO2和CH4浓度高于背景站的,且不同功能区CO2和CH4浓度存在差异.近地面大气CO2浓度与城市背景站差值(ΔCO2)空间分布呈现为商业居民混合区的＞住宅区的＞工业区的＞林区的＞太湖景区的;而CH4浓度的差值(ΔCH4)空间分布呈现为商业居民混合区的＞林区的＞住宅区的＞工业区的＞太湖景区的.(2)车辆排放是无锡市主要的CO2和CH4排放源,污水处理厂是主要的CH4排放源,排放热点附近大气CO2和CH4浓度较周围高约30％及以上.(3)隧道内CH4:CO2值为0.0014±0.00001,表明无锡市车辆以CO2排放为主.
Abstract
Cities are the concentrated spots of greenhouse gas emissions.In this study,we used three Portable CO2/CH4/H2O analyzers to observe the near-surface atmospheric CO2 and CH4 concentrations in Wuxi City during the summer of 2022.The results indicate that:(1)The CO2 and CH4 concentrations of near-surface atmosphere are higher than those at the background station,and they vary in different func-tional zones.The spatial distribution of the difference(ΔCO2)between the near-surface atmospheric CO2 concentration and the CO2 concentration at the urban background station is as follows:the CO2 concentra-tion of the mixed commercial and residential area is higher than that of the residential area,followed by the CO2 concentration in the industrial area,the forest area and the Lake Taihu scenic spot from high to low.The CH4 difference(ΔCH4)is distributed in the following pattern:the CH4 concentration of the mixed commercial and residential zone＞CH4 concentration of the forest zone＞CH4 concentration of the res-idential zone＞CH4 concentration of the industrial zone＞CH4 concentration of the Lake Taihu scenic spot.(2)Vehicle emissions are the main sources of CO2 and CH4 emissions in Wuxi,and sewage treatment plants are the main source of CH4 emission.The atmospheric CO2 and CH4 concentrations near the emis-sion-concentrated spots are about 30％higher than those in the surrounding areas.(3)The ratio of CH4 to CO2 in the tunnel is 0.0014±0.00001,which indicates that the emission of vehicles is dominated by the CO2 emission in the urban area of Wuxi.
关键词
CO2和CH4/车载移动观测/热点识别/城市功能区Key words
CO2 and CH4/vehicle-mounted mobile observation/hotspot identification/urban func-tional zone引用本文复制引用
基金项目
国家重点研发计划项目(2019YFA0607202)
国家重点研发计划项目(2020YFA0607501)
江苏省杰出青年基金项目(BK20220055)
江苏省碳达峰碳中和科技创新专项资金(前沿基础)项目(BK20220020)
出版年
2024
NETL
NSTL
万方数据