Shi Yu-zhen, Xu Yong-fu, Wang Geng-chen, Shi Li-qing
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.
Huan Jing Ke Xue. 2009 Oct 15;30(10):2832-8.
The data of O3, NOx (NO and NO2), CO and SO2 observed at Beijing 325m meteorological tower from June 25 to July 7, 2000 and from July 26 to August 22, 2000 are used to analyze the difference of pollutant concentrations on weekends and weekdays, and its causes. Results show that except SO2, the correlations of O3, NOx, NO, NO2 and CO concentrations between weekends and weekdays are very significant,since they all pass the t-test significance level at alpha = 0.05. The correlation coefficients (R) are 0.99, 0.61, 0.56, 0.80 and 0.61 for O3, NOx, NO, NO2 and CO3, respectively. Weekend NO, and CO concentrations are lower than weekday concentrations in rush hours (06:00-08:00), and the mean deviations for NOx and CO concentrations are -28% and -9%, respectively. The regression coefficient of O3 concentrations between weekends and weekdays is 1.25 +/- 0.02. Furthermore, the maximum 1-h average O3 concentration and maximum 8-h average O3 concentration on weekends are 23% and 26% higher than those on weekdays, respectively, indicating an obvious O3 "weekend effect".
利用2000年6月25日至7月7日以及2000年7月26日至8月22日在北京325米气象塔观测到的O₃、氮氧化物（NO和NO₂）、CO和SO₂数据，分析周末和工作日污染物浓度的差异及其成因。结果表明，除SO₂外，周末和工作日的O₃、氮氧化物、NO、NO₂和CO浓度之间的相关性非常显著，因为它们在α = 0.05时均通过了t检验显著性水平。O₃、氮氧化物、NO、NO₂和CO的相关系数（R）分别为0.99、0.61、0.56、0.80和0.61。周末的NO和CO浓度在高峰时段（06:00 - 08:00）低于工作日浓度，氮氧化物和CO浓度的平均偏差分别为 - 28%和 - 9%。周末和工作日O₃浓度的回归系数为1.25 ± 0.02。此外，周末1小时平均O₃浓度最大值和8小时平均O₃浓度最大值分别比工作日高23%和26%，表明存在明显的O₃“周末效应”。
