夏季上海城区大气中二氧化碳浓度特征及相关因素分析

利用连续自动监测仪器,获得CO2源区上海城区2010年夏季高时间分辨率的CO2连续监测数据.监测期间CO2平均浓度为414±16ppm,高于同期全球本底观测站约6%,与中国其他城市化地区的浓度水平基本相当或略低.CO2浓度日变化呈显著早晚双峰特征;周变化呈显著的波浪形,高值集中出现在工作日.除O3外,与其他污染物呈显著...

Analysis of Characteristics and Affecting Factors of Atmospheric CO2 Concentration in Urban Area in Summer

By continuous monitoring equipment, hourly CO₂ concentrations were measured in summer in Shanghai urban area, which is a source area of CO₂. The average concentration of CO₂ was 414+16ppm, higher than the world background value for about 6%, equal to or lower than other urbanization places in China. The diurnal variation of CO₂ concentration showed two peaks in the morning and evening. For weekly variation, daily average was higher in workdays. Concentrations of CO₂ were significantly correlated with those of other pollutants except for O₃, indicating the similarity of emission sources. The average concentrations of CO₂ were relatively higher in western wind direction. From the case study, regional transportation was one of the sources that cause high CO₂ concentration in Shanghai Urban Area. Southwest and northwest were the main transportation directions.