Affiliations: Institute of Urban Meteorology, CMA, Beijing 100089,
China | State Joint Key Laboratory of Environmental Simulation
and Pollution Control, College of Environmental Sciences, Peking University,
Beijing 100871, China | State Joint Key Laboratory of Environmental Simulation
and Pollution Control, College of Environmental Sciences, Peking University,
Beijing 100871, China
Abstract: The recent year's monitor results of Beijing indicated that the
pollution level of fine particles PM_{2.5} showed an
increasing trend. To understand pollution characteristics of
PM_{2.5} and its relationship with the meteorological
conditions in Beijing, a one-year monitoring of PM_{2.5}
mass concentration and correspondent meteorological parameters was performed in
Beijing in 2001. The PM_{2.5} levels in Beijing were very
high, the annual average PM_{2.5} concentration in 2001 was
7 times of the National Ambient Air Quality Standards proposed by US EPA. The
major chemical compositions were organics, sulfate, crustals and nitrate. It
was found that the mass concentrations of PM_{2.5} were
influenced by meteorological conditions. The correlation between the mass
concentrations of PM_{2.5} and the relative humidity was
found. And the correlation became closer at higher relative humidity. And the
mass concentrations of PM_{2.5} were negtive-correlated to
wind speeds, but the correlation between the mass concentration of
PM_{2.5} and wind speed was not good at stronger wind.
Keywords: meteorological conditions, quantitative relation, fine particles (PM[TeX:] _{2.5}), Beijing
