Abstract
In this study, the synoptic weather types that have high probability and low probability of producing PM 10 episode are referred to as HPE and LPE, respectively. Multiple linear regressions analysis showed that NO 2 was the most important contributor (35.61%) to the concentrations of PM 10 for HPE weather. For LPE weather, the season factor had the greatest contribution (48.11%) to the concentrations of PM 10. Using the correlation coefficients between the concentrations of PM 10 and SO 2 or NO 2 on HPE and LPE to calculate the increase of PM 10 from LPE to HPE, we found that the increase of PM 10 owing to the increase of SO 2 and NO 2 from LPE to HPE was 12.93 μg/m 3 which was about 51% of the total amount of PM 10 increased from LPE to HPE. Results of factor analysis showed that the first component could be attributed to the result of local pollution especially for the weather patterns of types P3 and P6, while the secondary component for the weather patterns of types P1 and P4 can be attributed to the long-range transport of SO 2 pollutants from China.
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