<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Kai Qiao</style></author><author><style face="normal" font="default" size="100%">Zhijun Wu</style></author><author><style face="normal" font="default" size="100%">Xiangyu Pei</style></author><author><style face="normal" font="default" size="100%">Qianyun Liu</style></author><author><style face="normal" font="default" size="100%">Dongjie Shang</style></author><author><style face="normal" font="default" size="100%">Jing Zheng</style></author><author><style face="normal" font="default" size="100%">Zhuofei Du</style></author><author><style face="normal" font="default" size="100%">Wenfei Zhu</style></author><author><style face="normal" font="default" size="100%">Yusheng Wu</style></author><author><style face="normal" font="default" size="100%">Shengrong Lou</style></author><author><style face="normal" font="default" size="100%">Song Guo</style></author><author><style face="normal" font="default" size="100%">Chak K. Chan</style></author><author><style face="normal" font="default" size="100%">Ravi Kant Pathak</style></author><author><style face="normal" font="default" size="100%">Mattias hallquist</style></author><author><style face="normal" font="default" size="100%">Min Hu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Size-resolved effective density of submicron particles during summertime in the rural atmosphere of Beijing, China</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Environmental SciencesJournal of Environmental Sciences</style></secondary-title><short-title><style face="normal" font="default" size="100%">J Environ Sci-China</style></short-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">atmospheric aerosol</style></keyword><keyword><style  face="normal" font="default" size="100%">Centrifugal particle mass analyzer</style></keyword><keyword><style  face="normal" font="default" size="100%">Effective density</style></keyword><keyword><style  face="normal" font="default" size="100%">new particle formation</style></keyword><keyword><style  face="normal" font="default" size="100%">rural site</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2018</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2018/11/01/</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">73</style></volume><pages><style face="normal" font="default" size="100%">69-77</style></pages><isbn><style face="normal" font="default" size="100%">1001-0742</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Particle density is an important physical property of atmospheric particles. The information on high time-resolution size-resolved particle density is essential for understanding the atmospheric physical and chemical aging processes of aerosols particles. In the present study, a centrifugal particle mass analyzer (CPMA) combined with a differential mobility analyzer (DMA) was deployed to determine the size-resolved effective density of 50 to 350nm particles at a rural site of Beijing during summer 2016. The measured particle effective densities decreased with increasing particle sizes and ranged from 1.43 to 1.55g/cm3, on average. The effective particle density distributions were dominated by a mode peaked at around 1.5g/cm3 for 50 to 350nm particles. Extra modes with peaks at 1.0, 0.8, and 0.6g/cm3 for 150, 240, and 350nm particles, which might be freshly emitted soot particles, were observed during intensive primary emissions episodes. The particle effective densities showed a diurnal variation pattern, with higher values during daytime. A case study showed that the effective density of Aitken mode particles during the new particle formation (NPF) event decreased considerably, indicating the significant contribution of organics to new particle growth.</style></abstract></record></records></xml>