# # #背景中国东部(2017.01)现在遭受着严重的阴霾与PM2.5浓度。烟雾,能见度低和复杂的化学成分数十亿人的健康构成威胁。但是当我浏览全国各地的污染物浓度,我发现了一些有趣的现象。# # #的一般是一个快照PM2.5浓度分布地图,中国东部(剪从aqistudy.cn)。红色和紫色的圆圈代表PM2.5的高地面载荷。[![在这里输入图像描述][1]][1]>从上面的图中,我们可以确定PM2.5浓缩的高的位置。与此同时,我也剪O3浓度分布在同一时间。[![在这里输入图像描述][2]][2]>从上面的图中,我们可以观察到,O3污染不严重的烟雾区。 > Actually, the conc of Ozone are lower in the area which the PM2.5 conc are higher. The real-time data are also presented here a supplement. I choose Beijing, Xi'an (two large city in China), Zhoushan(an island in Eastern China Sea), Sanya(nearby the southern China Sea) City | PM2.5 | NO2 | SO2 | O3 ------------------------------------- Beijing | 229 | 109 | 30 | 7 Xi'an | 381 | 147 | 34 | 12 Zhoushan | 20 | 28 | 14 | 70 Sanya | 16 | 9 | 2 | 77 ### units: ug/m3 IMHO, the high conc of PM2.5 and low conc of O3 can be explained as follows: >High loading of Aerosol -> strong extinction effect -> week solar radiation -> O3 formation slow down Here is another figure I clipped from Cheng et al. Sci. Adv. 2016. It depicts the NO2 and O3 conc in different PM2.5 level. [![enter image description here][3]][3] --- ### An Special case Look at the city of Anqing (30.5319° N, 117.1151° E), its PM2.5 and O3 concentration has a strange phenomenon. I clipped some figure of its air quality status (2016-01-04 local 12:00:00) #### Fig 1 Anqing City and Chizhou City These two nearby cities are in the distance less than 60 Km, has the similar PM2.5 conc with different O3 conc [![enter image description here][4]][4] #### Fig 2 Anqing City and its surrounding area [![enter image description here][5]][5] > What attract me is the high conc O3 of Anqing City comparing with its nearby area. And I found this feature is rare in China. Anyone has some theory to explain that? Any discussion or advises would be great! [1]: https://i.stack.imgur.com/ZBfmx.png [2]: https://i.stack.imgur.com/l3Jnk.png [3]: https://i.stack.imgur.com/4Y3IW.png [4]: https://i.stack.imgur.com/3jl7m.jpg [5]: https://i.stack.imgur.com/AZlPg.jpg