%0 Journal Article %A YU Lijuan %A YIN Chengmei %A HE Jianjun %A ZHANG Yongjing %A LI Rui %T Analysis of Fog and Haze Weather Characteristics and Its Impact Factors in Ji’nan of Shandong Province %D 2017 %R 10.11755/j.issn.1006-7639(2017)-04-0581 %J Journal of Arid Meteorology %P 581-589 %V 35 %N 4 %X

The characteristics of climatological variation for fog and haze weather in Ji’nan of Shandong Province during 2000-2013 were analyzed by using daily meteorological observation data firstly. Nine categories of weather types were identified using T-mode principal component analysis and K-means cluster method based on NCEP FNL sea level pressure data. The occurrence frequency of fog and haze weather under different weather types was investigated. The results are as follows: (1) The fog days decreased with a rate of 0.4 d per year during 2000-2013, which was closely related to the inter-annual variation of relative humidity. The hazy days had a normal fluctuation before 2011, but significantly increased during 2011-2013. Correlation analysis revealed that the inter-annual variation of haze day was obviously correlated with the inter-annual variation of the frequency of inversion between 850 and 700 hPa. (2) The high occurrence frequency of fog day was found under weak low pressure type (WT6) and north road cold air type(WT9) weather patterns in winter. The frequency of haze day was high under uniform pressure field type (WT1), weak cold air type (WT5) and north road cold air type (WT9) in winter and under weak high pressure center type (WT3) in autumn.

%U http://www.ghqx.org.cn/EN/10.11755/j.issn.1006-7639(2017)-04-0581