| 北京东灵山地区主要大气污染物浓度变化特征 |
| 摘要点击 2283 全文点击 1193 投稿时间：2012-10-17 修订日期：2012-12-04 |
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| 中文关键词 东灵山 大气污染 浓度 变化特征 气流轨迹 |
| 英文关键词 Dongling mountain air pollution concentration changing characteristics back trajectories |
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| 中文摘要 |
| 2009年8月~2011年6月在北京东灵山森林站连续观测了SO2、NOx、O3和PM2.5的浓度,利用观测数据分析了大气污染物的月变化、季节变化和统计日变化特征,结合气流轨迹探讨了传输对污染物的影响. 结果表明,观测期间NO、NO2、NOx、O3、SO2和PM2.5浓度的平均值分别为(2.0±1.6)、(13.2±7.2)、(15.3±8.2)、(61.0±19.6)、(3.6±3.6)、(35.6±32.0)μg·m-3,均低于北京城区的观测值. NOx浓度秋季最高,夏季最低,分别为(17.0±8.0)μg·m-3和(13.8±4.1)μg·m-3. O3浓度春、夏季高于秋、冬季,最高值出现在6月份. SO2冬季浓度最高,夏季浓度最低,冬季与夏季的比值约为2.7. PM2.5夏季的浓度要远高于其他3个季节,达到56.4 μg·m-3. NOx、O3和SO2浓度日变化显著,其中NOx日变化为双峰型,O3和SO2日变化为单峰型,PM2.5日变化幅度较小. |
| 英文摘要 |
| Concentrations of SO2, NOx, O3 and PM2.5 were observed from August 2009 to June 2011 in Beijing forest ecology observation site which locates at the Dongling Mountain of Beijing. Monthly, seasonal variation and statistical diurnal variation charactreistics of air pollutants were analyzed. Besides, the influence of transportation to air pollutants was also disscused combined with the back trajectories of air mass. The average concentrations of NO, NO2, NOx, O3, SO2 and PM2.5 were (2.0±1.6), (13.2±7.2), (15.3±8.2), (61.0±19.6), (3.6±3.6) and (35.6±32.0) μg·m-3, respectively. The concentration of pollutants in Beijing forest ecology observation site was lower than that in rural observation site in Beijing. The highest value of NOx appeared in autumn while the lowest appeared in summer, and concentrations of NOx in autumn and summer were (17.0±8.0) μg·m-3 and (13.8±4.1) μg·m-3, respectively. Concentrations of O3 in spring and summer were higher than those in autumn and winter. The highest concentration of O3 appeared in June. The concentration of SO2 in winter was the highest, and this concentration was 2.7 times to the lowest concentration in summer. The highest concentration of PM2.5 appeared in summer and was 56.4 μg·m-3. There were obvious diurnal variation of NOx, O3 and SO2.There are two peaks of NOx have been observed, however there are only one peak of O3 and SO2 has been observed. There was no obvious diurnal variation of PM2.5 to other pollutants. |
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