Temporal Variation of Urban Air Quality in Nanchong, a Big City of Southwest China

Kun Li; Xiao Shuang Tong; You Ping Li; Hong Zhou

doi:10.4028/www.scientific.net/AMR.1010-1012.385

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Dynamic Monitoring of Vegetation Coverage in Daliuta Mine Based on ENVI and GIS Technology
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Effects of Different Flooding Frequencies on Soil Nitrogen Mineralization in Typical Floodplain Wetlands under Aerobic Conditions
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Temporal Variation of Urban Air Quality in Nanchong, a Big City of Southwest China
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The Impact of Raw Material Purity on R142b Standard Gas Mixture Preparation
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The Temporal and Spatial Variation of the Nutrientsin the Yangtze River Estuary
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Water Environment Numerical Simulation for a Complicated River-Lake System
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Temporal Variation of Urban Air Quality in Nanchong, a Big City of Southwest China

Abstract:

The article applied 2008-2012 hourly mass concentrations of PM₁₀ , SO₂ and NO₂and air pollution index (API) data to discuss the temporal variation of urban air quality in Nanchong, a big southwest city in China. The results showed that the annual mean PM₁₀_,SO₂ and NO₂concentrations during 5 years were 61±1μg.m^-3, 45±4μg.m^-3, 35±5μg.m^-3, respectively. And the annual mean concentrations and API values presented decreasing tendency, which were less than the annual second-level air quality limit except for NO₂ in 2008. In addition, the monthly mean values in spring and winter were higher than those in summer and fall, which the maximum appeared in December, and January, the minimum appeared in July and August.