Abstract: The characteristics of mass concentrations of PM₁₀ and PM_2.5,and their distribution and correlation with meteorological parameters in Huangshi were analyzed using the online monitoring data of inhalable particulate matter (PM₁₀) and fine particulate matter (PM_2.5) at five monitoring stations and surface meteorological elements such as wind direction,wind speed,air temperature,air pressure from January to December in 2015.The results show that the annual average concentrations of PM₁₀ and PM_2.5 at the five monitoring sites in Huangshi in 2015 range within 95.8-108.6 μg·m^-3 and 64.3-68.9 μg·m^-3,respectively;both exceed the National secondary standard.The seasonal mean mass concentrations of PM₁₀ and PM_2.5 are higher (143.9 ±62.2 for PM₁₀ and 95.5 ±44.5 μg·m^-3 for PM_2.5) in winter,and low (75.2±24.0 for PM₁₀ and 50.7 ±17.3 μg·m^-3 for PM_2.5) in summer,respectively.Among the five monitoring stations,PM pollution is heavier in the Xialu,Xisai,and Tieshan districts,and the mass concentrations of PM₁₀ and PM_2.5 have significant correlation at all sites.The concentrations of atmospheric particulate matter have a negative correlation with air temperature,positive correlation with air pressure,no significant correlation with wind speed and relative humidity,and influenced largely by wind direction.

Key words: PM_2.5, PM₁₀, Mass concentration, Meteorological parameters