%0 Journal Article
%T Characterizing Spatial Patterns of NOx, SO2,. and O3 in Pearl River Delta by Passive Sampling<br>被动采样监测珠江三角洲NOx、SO2和O3的空间分布特征
%A ZHAO Yang
%A SHAO Min
%A WANG Chen
%A WANG Bo-guang
%A LU Si-hua
%A ZHONG Liu-ju
%A <br>赵阳
%A 邵敏
%A 王琛
%A 王伯光
%A 陆思华
%A 钟流举
%J 环境科学
%D 2011
%I 
%X Concentrations of NO(x), SO2 and O3 were measured by passive sampling within 200km x 200km grid in Pearl River Delta (PRD). Sampling period was two weeks in November, 2009. Spatial distributions of NO(x), SO2 and O3 were obtained by Kriging interpolation method. The results were compared with emission inventories and modeling results. The transportations of O3 were evaluated by using backward trajectories of air parcels. During the sampling period, the mean concentrations of NO(x), SO2 and O3 were 75.9 microg/m3, 37.3 microg/m3 and 36.2 microg/m3, respectively. And the highest concentrations of NO(x), SO2 and O3 were 195.7 microg/m3, 95.9 microg/m3 and 81.8 microg/m3. Comparing with routine measurements from the regional monitoring network in PRD, the results by passive method were 18.6%, 33.5% and 37.5% lower for NO(x), SO2 and O3, respectively. The spatial patterns demonstrated that higher NO(x) concentrations often appeared in cities such as Guangzhou, Foshan and Shenzhen. SO2 concentrations were higher in west and lower in east. High SO2 concentrations are mainly from emission of power plants and industrial sources. Concentrations of O3 showed the highest levels in the south of PRD. Backward trajectory analysis for higher ozone areas indicated that 53% of the air masses were from the region with high concentration of NO(x). The horizontal transportation caused higher ozone in the south while lower in north in PRD.
%K passive sampler
%K NOx
%K SO2
%K O3
%K Pearl River Delta
%K spatial distribution
%K backward trajectory<br>被动采样
%K 氮氧化物
%K 二氧化硫
%K 臭氧
%K 珠江三角洲
%K 空间分布
%K 反向轨迹
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=D977689DE51ECF11C16A72717F133BDC&yid=9377ED8094509821&vid=9971A5E270697F23&iid=0B39A22176CE99FB&sid=90612DF06FCE4D55&eid=C6EC7357BCACD3A4&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=31