[Impact of Marine-atmospheric Process on Aerosol Number Size Distribution in the South China Sea].

The shipboard measurements of aerosol number concentration from August 28th to October 13th, 2012 were conducted to analyze the characteristics of temporal-spatial distribution and number size distribution of marine aerosol in the South China Sea. The impact of meteorological condition on the marine aerosol was also analyzed in this paper. The result showed that the temporal-spatial distribution and number size distribution of marine aerosol were influenced by the backward trajectory of the air masses and the time they spent over the sea, and the meteorological conditions in the local sea area such as wind speed, wind direction, temperature, relative humidity and cloud cover.

[Variation of atmospheric particle number concentrations in Qingdao and its impact on visibility].

Atmospheric particle number concentrations were measured from September 2010 to August 2011 with potable light house laser particle counter to study the variation of atmospheric particle concentrations and its impact on visibility in Qingdao. Backward trajectory was calculated by Hysplit model. Statistical analysis was done to discuss the influence of meteorological factors on the atmospheric particle number concentrations and visibility.

Aerosol background at two remote CAWNET sites in western China.

The frequency distributions and some statistical features of background aerosol concentrations were investigated at two remote China Atmosphere Watch Network (CAWNET) stations. The estimated elemental carbon (EC) background at Akdala (AKD) in the mid-latitudes of northwestern China (approximately 0.15 microg m(-3)) was only half of that at Zhuzhang (ZUZ) in low-latitude southwestern China (approximately 0.