2006—2014年夏季,使用PANs在线监测仪对北京大气中PANs浓度进行监测,期间NOx浓度以每年1.7 n L/L(约4%/a)的速率下降,PAN浓度以每年0.03 n L/L(约3%/a)的速率下降,O3浓度却以每年1.5 n L/L(约4%/a)的速率上升,表明这些年采取的NOx治理措施对控制PAN浓度有效,治理O3需要在控制NOx的同时加强对VOCs排放的控制。
【英文摘要】
Ambient concentrations of PANs and other related air pollutants were monitored at an urban site in Beijing each August from 2006 to 2014. The NOx concentration decreased at a rate of 1.7 n L/(L/yr)(about 4%/yr), and the PAN concentration decreased at a rate of 0.03 n L/(L/yr)(about 3%/yr), while the O_3 concentration increased at a rate of 1.5 n L/(L/yr)(about 4%/yr), indicating that the measures taken to cut NOx were effective for controlling PAN concentration. Beijing needs to strengthen the control of VO...
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