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| The analysis of the characterization of fine particle size distribution in urban area of Guangzhou |
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Abstract Continuous online measurement of particle number size distribution in the range of 5nm~10μm were performed in Guangzhou from October to November, 2008 by using fine particle meter (FPM-I). Meanwhile, the visibility sensor, black carbon analyzer and meteorological data sensor had also been used. Particle size distribution analysis showed that number size distribution, surface size distribution and volume size distribution were all in two-peak pattern. The daily average concentration of nucleation mode (5~20nm) particles, aitken mode (20~100nm) particles, accumulation mode (100nm~1μm) particles were in the range of 1400~4300cm-3, 5000~12300cm-3 and 1600~2600cm-3, respectively. The comparison of data in sunny and haze days showed that the concentration of accumulation mode particles had a negative relationship with visibility, while those of nucleation mode and Aitken mode particles had slightly influence to it. The peaks of the black carbon mass concentration and the number concentration of Aitken mode particle appeared in the same position, which means that the concentration of Aitken mode particles to the black carbon mass concentration cannot be ignored.
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Received: 10 November 2011
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