摘要:

Size distributions and particle number concentrations of atmospheric aerosols in the size (diameter) range from 15 mn to 10 mu m were measured on board of a research ship during three cruises in China adjacent seas. The total particle number concentrations were in average around 4000 cm(-3) in Yellow Sea, 2000 cm(-3) in East China Sea and 1000 cm(-3) in South China Sea. The observed size distributions were fitted with two or three log-normal modes and the data were classified according to time, regions and calculated air mass back-trajectories. The size distribution spectra of air masses of polluted continental origin as their back-trajectories showed were characterized by single mode with total number concentrations between 1000 and 10000 cm(-3). The size distributions in marine air masses showed dual mode characteristics, one maximum at 40-60 nm and the other at 160-190 nm with total number concentrations below 1000 cm(-3). This type of dual mode was more pronounced at longer residence time of the air masses over the ocean. The burst of ultra-fine (UF) particles and the consequent growth processes were observed twice in Yellow Sea and possible reasons leading to these events are discussed. The particle growth rate (GR) was 3.4 +/- 0.9 and 3.5 +/- 1.6 nm h(-1), respectively (95% confidence interval), indicating that the UF particles can grow to cloud condensation nuclei (CCN) within the next 1-2 days.) (C) 2007 Elsevier Ltd. All rights reserved.

附注:

ISI Document Delivery No.: 225ANTimes Cited: 21Cited Reference Count: 37Lin, Peng Hu, Min Wu, Zhijun Niu, Yuwen Zhu, TongWu, Zhijun/A-7041-2012; ZHU, TONG/H-6501-2011; Lin, Peng/G-4867-2016ZHU, TONG/0000-0002-2752-7924; Lin, Peng/0000-0002-3567-701724123Pergamon-elsevier science ltdOxford