Paschalidou A K, Kassomenos P A
Laboratory of Meteorology, Department of Physics, University of Ioannina, 451 10 Ioannina, Greece.
Environ Technol. 2004 Nov;25(11):1241-55. doi: 10.1080/09593332508618372.
The objective of the present study is to contribute to the understanding of the "ozone weekend effect" as it occurs in the Greater Area of Athens, Greece both in the summer and wintertime. Therefore, weekly cycles of CO, NO and O3 concentrations for the 18-year-period 1983-2000 are studied. Each day of the week is considered separately, while sites with different levels of primary pollutants are examined. The reduction of the meteorological influence in the O3 mechanisms is achieved by applying meteorological classifications. The analysis for the cold period reveals that CO and NO display decreasing concentrations from weekdays to weekends, whereas O3 shows increasing concentrations. During the warm period, although primary pollutants display decreased concentrations compared to the cold period, their weekly cycles remain the same. On the other hand, meteorological changes affect the weekly cycle of ozone peaks. During days with unfavourable meteorology to ozone production, weekend ozone concentrations are higher than weekday O3 concentrations. The reverse is observed during days with favourable meteorology to ozone production.
本研究的目的是促进对希腊雅典大区夏季和冬季出现的“臭氧周末效应”的理解。因此，研究了1983 - 2000年这18年期间一氧化碳（CO）、一氧化氮（NO）和臭氧（O₃）浓度的每周循环情况。每周的每一天都分别进行考虑，同时对具有不同水平一次污染物的地点进行了检查。通过应用气象分类法减少了气象因素对臭氧形成机制的影响。对寒冷时期的分析表明，一氧化碳和一氧化氮的浓度从工作日到周末呈下降趋势，而臭氧浓度则呈上升趋势。在温暖时期，尽管与寒冷时期相比一次污染物浓度有所下降，但其每周循环情况保持不变。另一方面，气象变化影响臭氧峰值的每周循环。在不利于臭氧生成的气象条件下，周末的臭氧浓度高于工作日的臭氧浓度。在有利于臭氧生成的气象条件下则观察到相反的情况。
