Exploring atmospheric free-radical chemistry in China:the self-cleansing capacity and the formation of secondary air pollution  

作　　者：Keding Lu Song Guo Zhaofeng Tan Haichao Wang Dongjie Shang Yuhan Liu Xin Li Zhijun Wu Min Hu Yuanhang Zhang 

机构地区：[1]State Key Joint Laboratory of Environmental Simulation and Pollution Control,College of Environmental Sciences and Engineering,Peking University,Beijing 100871,China [2]CAS Center for Excellence in Regional Atmospheric Environment,Chinese Academy of Sciences,Xiamen 361021,China

出　　处：《National Science Review》2019年第3期579-594,共16页国家科学评论（英文版）

基　　金：supported by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China(2014BAC21B01);the National Natural Science Foundation of China(91544225,21522701,91544214,21677002,4137512,21190052);the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB05010500);the National research fund for tackling key problems in air pollution control(DQGG0103)

摘　　要：Since 1971,it has been known that the atmospheric free radicals play a pivotal role in maintaining the oxidizing power of the troposphere.The existence of the oxidizing power is an important feature of the troposphere to remove primary air pollutants emitted from human beings as well as those from the biosphere.Nevertheless,serious secondary air-pollution incidents can take place due to fast oxidation of the primary pollutants.Elucidating the atmospheric free-radical chemistry is a demanding task in the field of atmospheric chemistry worldwide,which includes two kinds of work:first,the setup of reliable radical detection systems;second,integrated field studies that enable closure studies on the sources and sinks of targeted radicals such as OH and NO3.In this review,we try to review the Chinese efforts to explore the atmospheric free-radical chemistry in such chemical complex environments and the possible link of this fast gas-phase oxidation with the fast formation of secondary air pollution in the city-cluster areas in China.Since 1971, it has been known that the atmospheric free radicals play a pivotal role in maintaining the oxidizing power of the troposphere. The existence of the oxidizing power is an important feature of the troposphere to remove primary air pollutants emitted from human beings as well as those from the biosphere. Nevertheless, serious secondary air-pollution incidents can take place due to fast oxidation of the primary pollutants. Elucidating the atmospheric free-radical chemistry is a demanding task in the field of atmospheric chemistry worldwide, which includes two kinds of work: first, the setup of reliable radical detection systems; second, integrated field studies that enable closure studies on the sources and sinks of targeted radicals such as OH and NO3. In this review, we try to review the Chinese efforts to explore the atmospheric free-radical chemistry in such chemical complex environments and the possible link of this fast gas-phase oxidation with the fast formation of secondary air pollution in the city-cluster areas in China.

关 键 词：ATMOSPHERIC CHEMISTRY free RADICALS new particle formations OH NO3 

分 类 号：N[自然科学总论]