城郊气象因素与NOx、PM10的多重分形分析

针对城区和郊区气象因素与NOx、PM10浓度间的互相关性的特征，采用多重分形去趋势波动互相关分析法（MF-DCCA），对气象因素与NOx、PM10浓度时间序列进行研究。首先验证了温度与NOx、PM10具有互相关性和多重分形特征，然后，逐次分析城区和郊区在夏冬两季温度、湿度、风速、气压与NOx、PM10的多重分形特征。结果表明，城区天气因素与PM10、NOx的多重分形特征要强于郊区，两地天气因素对PM10的影响程度要强于对NOx的程度，城区和郊区夏季的天气因素与PM10的多重分形特征均强于冬季。

Multifractal analysis of meteorological factors and NOx,PM10 in urban and suburban

The cross-correlation between meteorological factors (temperate, humidity, wind speed and pressure) and NOx, PM10 were studied through multifractal detrended cross-correlation analysis. Firstly, the cross-correlation test is carried out and the results indicate that cross-correlation behaviors exist statistically between them. Then the multifractal characteristics between temperature, humidity, wind speed, air pressure and NOx, PM10 of both urban and suburban in summer and winter were compared. The results showed that the strengths of multifractal spectrum between them in urban area were found to be stronger than that in rural area. Finally the multifractal characteristics between meteorological factors and PM10 in summer were concluded to be stronger than that in winter.