摘要
利用南京市北郊2014年7月11日至2014年9月10日近地面O3浓度的连续观测数据,结合相应气象要素资料,分析了近地面O3浓度的逐日变化、日变化以及不同天气条件下的日变化特征,同时对青奥会时段以及非青奥会时段O3浓度进行了比较与分析,探讨了O3浓度与气象要素的相关性。结果表明：1整个观测期间O3浓度日均值为75.55μg/m3,青奥会时段日均值为66.47μg/m3,非青奥会时段为79.74μg/m3,随着青奥会的临近,O3浓度呈现逐渐降低的趋势。2 O3浓度的日变化呈现单峰型的特点,夜间变化平缓,白天变化剧烈。3不同天气条件下,晴天、阴天、雨天的O3浓度的日均值分别为102.23、63.66、63.86μg/m3,日变化最强烈的是晴天,阴天和雨天日变化较为平缓。4O3浓度的日均值出现的频率主要集中在40-80μg/m3之间,占总日数的59.02%。5太阳辐射强度、相对湿度、气温、风向、风速影响O3浓度的变化,其中O3浓度与气温及太阳辐射呈正相关关系,与相对湿度呈负相关关系。
In this paper,the daily variations of surface ozone concentration under different weather conditions were analyzed based on the observation data of surface ozone concentration in Northern Suburb of Nanjing City,Chinaduring the period from July 11,2014 to September 10,2014 and also the corresponding meteorological data,ozone concentration during the Youth Olympic Games period and other period were compared and analyzed. Moreover,the main factors affecting the variation of ozone concentration were discussed. Results show that 1 the daily mean value of ozone concentration was 75. 55 μg / m3 during the observed period,and the daily mean value of ozone concentration was 66. 47 μg / m3 during the Youth Olympic Games period and that of other period was 79. 74 μg / m3. With the Youth Olympic Games coming,concentrations of ozone show obvious declining trend; 2 daily variation curve of ozone concentration was unimodal,and the nocturnal variation was gentle but the diurnal one was significant; 3daily mean value of ozone concentrations were 102. 23,63. 66,and 63. 86 μg / m3 on sunny,cloudy and rainy days,respectively. Under different weather conditions,daily ozone concentration varied the most significantly on sunny days,and gently on rainy and cloudy days; 4daily mean value of ozone concentration frequency was mainly distributed within the range of 40-80 μg / m3,accounting for 59. 02% of total days; 5variation of near surface ozone concentration could be affected by some meteorological factors,such as the relative humidity,wind speed,wind direction and sunshine duration,and the ozone concentration was positively correlated with temperature and sunshine duration and negatively correlated with the relative humidity.
出处
《地球与环境》
CAS
CSCD
2016年第2期161-168,共8页
Earth and Environment
基金
教育部高等学校博士学科点专项科研基金项目(20123228110003)
国家自然科学基金项目(41475108)
上海市气象局科技开发项目(QM201520)
关键词
南京
臭氧
变化特征
光化学
大气污染
Nanjing
ozone
variation characteristics
actinochemistry
air pollution
