Contributions of pollutants from north china plain to surface ozone at the shangdianzi GAW station
Contributions of pollutants from north china plain to surface ozone at the shangdianzi GAW station
复制标题
华北平原污染物对上甸子GAW站地表臭氧的贡献
DOI：
10.5194/acp-8-5889-2008
复制
发表时间：
2008-01-01
影响因子：
6.3
通讯作者：
Tang, J.
中科院分区：
文献类型：
--
作者：
Lin, W.;Xu, X.;Tang, J.
Regional ozone pollution has become one of the top environmental concerns in China, especially in those economically vibrant and densely populated regions, such as North China region including Beijing. To address this issue, surface ozone and ancillary data over the period 2004?2006 from the Shangdianzi Regional Background Station in north China were analyzed. Due to the suitable location and valley topography of the site, transport of pollutants from the North China Plain was easily observed and quantified according to surface wind directions. Regional (polluted) and natural (clean) background ozone concentrations were obtained by detailed statistic analysis. Contribution of pollutants from North China Plain to surface ozone at SDZ was estimated by comparing ozone concentrations observed under SW wind conditions and that under NE wind conditions. The average daily accumulated ozone contribution was estimated to be 240 ppb·hr. The average regional contributions to surface ozone at SDZ from the North China Plain were 21.8 ppb for the whole year, and 19.2, 28.9, 25.0, and 10.0 ppb for spring, summer, autumn, and winter, respectively. The strong ozone contribution in summer led to disappearance of the spring ozone maximum phenomenon at SDZ under winds other than from the WNN to E sectors. High winter NO x concentrations in the North China Plain caused negative ozone contribution in winter.
