摘要
Formation of new atmospheric aerosol particles is a global phenomenon that has been observed to take place in even heavily-polluted environments. However, in all environments there appears to be a threshold value of the condensation sink （due to pre-existing aerosol particles） after which the formation rate of 3 nm particles is no longer detected. In China new particle production has been observed at very high pollution levels （condensation sink about 0.1 s-1 ） m several megaclt es, including Beijing, Shanghai and Nanjing as well as in Pearl River Delta （PRD）. Here we summarize the recent findings obtained from these studies and discuss the various implications these findings will have on future research and policy.
Formation of new atmospheric aerosol particles is a global phenomenon that has been observed to take place in even heavily-polluted environments. However, in all environments there appears to be a threshold value of the condensation sink （due to pre-existing aerosol particles） after which the formation rate of 3 nm particles is no longer detected. In China new particle production has been observed at very high pollution levels （condensation sink about 0.1 s-1 ） m several megaclt es, including Beijing, Shanghai and Nanjing as well as in Pearl River Delta （PRD）. Here we summarize the recent findings obtained from these studies and discuss the various implications these findings will have on future research and policy.
基金
The work in this manuscript is supported by Academy of Finland via Center of Excellence in Atmospheric Sciences （Project No. 272041） and the Finnish Funding Agency for Technology and Innovation TEKES via Beautiful Beijing project （No. 3667/31/2013） and European Research Council Advanced Grant （ATMNUCLE, 227463） and InGOS DEFROST and CRAICC （No. 26060） and Nordforsk CRAICC-PEEX （amendment to contact 26060） funded by Nordforsk. The SORPES station was supported by Nanjing University and the Collaborative Innovation Center of Climate Change in Jiangsu Province, China. Part of Aijun Ding＇s work was supported by the excellent young scientist fund of National Natural Science Foundation of China （No. D0512/41422504）.
