兰州城区臭氧浓度时空变化特征及其与气象条件的关系

依据兰州市环境监测站１９８５－１９９６年大气Ｏ３的监测资料，对兰州城区Ｏ３浓度的年际变化，年变化，日变化和空间分布等时空变化特征进行了分析研究，并分析了其浓度变化与气象条件的关系。结果表明：兰州城区大气Ｏ３浓度存在着较明显的年际变化，最近几年有准两年的变化周期，且其年平均浓度值有波动式升高的趋势；年变化与日变化为单周期，浓度最大值分别出现在７月和午后，空间分布以兰州西固区Ｏ３浓度最高；Ｏ３浓度分布

Temporal and Spatial Variations of Ozone Concentration and Its Relations with Meteorological Factors in Lanzhou Proper

Ozone concentration is an important index for the degree of photochemical smog pollution of the city.This paper mainly studies temporal and spatial variations of ozone con- centration such as interannual change,annual change,daily change and spatial distribution in Lanzhou Proper.Furthermore,The relation between ozone concentration and meteorolog- ical factors are also analysed.The results show that atmospheric ozone concentration in L anzhou Proper has an obviously interannual change,displaying a period of quasi- bennial os- cillation in the recent years.Its annual mean concentration shows a wavy ascending trend. What's more,both annual change and daily change are of single period.The maximum of ozone concentration emerges in July of a year or in the afternoon of a day.Meanwhile,spa- tial distribution is discovered that the maximum appears in Xigu industrial area of L anzhou Proper.At last,it is also pointed outthatozone concentration is in some ways related to the meteorological factors such as precipitation,sunshine,temperature and so on.