| Real-Time Observation on Water-Soluble Ions of PM2.5in Beijing under the Influences of Different Air Masses in Summer简 |
| |
| 作者姓名： | CHENG Meng-Tian SUN Yang ZHU Xiao-Wan CHAO Na |
| |
| 基金项目： | funded by the National Natural Science Foundation of China （41175107 and 41275139） |
| |
| 摘 要： | To further understand the variations of water-soluble ions in PM2.5 in Beijing,the authors observed their concentrations continuously and in high temporal resolution by the system for rapid collection of fine particles and ion chromatography（RCFP-IC） during 12–18 July 2010.These results combined with those of earlier backward trajectory research are used analyzed to determine the causes of concentration changes in water-soluble ions under the influences of two kinds of air masses in summer.The results indicate that concentrations of NO3^-,SO4^2-,and NH4＋ were influenced strongly by the continental air mass than by the marine air mass.Cl^- and Na^＋ were not changed significantly.Because the sources of K^＋,Mg^2＋,and Ca^2＋ are mainly concentrated on land,their concentration levels were slightly higher under the control of continental air mass than that of the marine air mass.Variations of NO2^- during the observation differed from those of other ions;its concentration was significantly higher under the influence of marine air mass.Moreover,the authors obtain the diurnal variations of eight water-soluble inorganic ions including NH4^＋,K^＋,Mg^2＋,Ca^2＋,Cl^-,NO2^-,NO3^-,and SO4^2-.Diurnal variations of NH4^＋,NO3^-,and Cl^- showed single peak,which appeared before noon,while SO4^2- showed two peaks that appeared during rush hours.Those of Mg^2＋,Ca^2＋,and K＋ showed single peak that appeared in the afternoon.That of NO2^- showed with a peak appearing at sunrise and a valley appearing at sunset.
|
| 关 键 词： | aerosol water-soluble ions PM2.5 summer Beijing |
Real-Time Observation on Water-Soluble Ions of PM2.5in Beijing under the Influences of Different Air Masses in Summer |
| |
| CHENG Meng-Tian,SUN Yang,ZHU Xiao-Wan,CHAO Na.Real-Time Observation on Water-Soluble Ions of PM2.5in Beijing under the Influences of Different Air Masses in Summer[J].Atmospheric and Oceanic Science Letters,2014(1):23-27. |
| |
| Authors: | CHENG Meng-Tian SUN Yang ZHU Xiao-Wan CHAO Na |
| |
| Institution: | State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China |
| |
| Abstract: | |
| |
| Keywords: | |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
