Abstract:
Observational data of atmospheric PM
10 in Zhuhai city from June 2000 to May 2001 was chosen to analyze the spatial and temporal variation characteristic of PM
10 in 3 monitoring stations (Xiangzhou,Qianshan and Jida).It was shown that the annual average PM
10 concentration was 40 μg/m\+3 (the corrected mass concentration is 52 μg/m\+3),which did not exceed the Class II category of the National Ambient Air Quality Standards in China.Compared with other cities in the world,the atmospheric PM
10 pollution in Zhuhai is slighter.The daily PM
10 concentrations monitored in Zhuhai reached the peak values,being 92 and 127 μg/m\+3 on April 14 and 15,2001 respectively.In comparison with the particulate matter concentrations of Hong Kong(nearby) and Yulin station (at the Asian Dust Source Regions),the high PM
10 values occurred at Zhuhai and Hong Kong in-phase.This as well as the results of trajectory analysis implied that Northern China dust storms were transported to Zhuhai.The monthly concentrations of PM
10 at three stations are at low level in the summer and fall periods and at high level in the winter and spring periods.The daily PM
10 concentration is mostly high in the daytime and low at night.