天津市东丽区一次持续性雾霾天气过程的特征及影响要素分析

doi:10.3969/j.issn.1673-503X.2021.05.002

Abstract

Abstract:

Based on conventional meteorological observation data and PM_2.5 concentration data, the characteristics and causes of persistent fog and haze weather occurring from January 10 to 14, 2019, in Dongli District of Tianjin were analyzed. The results show that the fog and haze weather has obvious phase characteristics. The general circulation, including upper-level straight stable westerly circulation, middle-level warm ridge, and weakened surface pressure, provides favorable synoptic conditions for the fog and haze weather. Visibility is more susceptible to relative humidity during light fog and haze stages, while at the fog stage, it is more susceptible to wind speed. PM_2.5 concentration and surface meteorological elements are closely related. PM_2.5 concentration is negatively correlated with visibility and wind speed and positively correlated with relative humidity. When other meteorological conditions are stable and the concentration of pollutants is high in the surrounding areas, the change of wind direction near the ground plays a key role in the occurrence of fog and haze in this regiony.

Key words: Fog and haze weather, Phase characteristics, Visibility

CLC Number:

P426.4

Jun SHI, Yu-jie ZHAO. Analysis of the characteristics and influencing factors of a persistent fog and haze weather process in Dongli District, Tianjin[J]. Journal of Meteorology and Environment, 2021, 37(5): 8-12.

Figures/Tables 7

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References 15

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天气	能见度与相对湿度	能见度与风速
霾	-0.63^**	0.31^**
轻雾	-0.74^**	0.28^*
雾	-0.13^**	-0.44^**

要素	能见度	风速	相对湿度
PM_2.5浓度	-0.81^**	-0.75^**	0.83^**

时间	能见度/m	风速/(m·s^-1)	风向	相对湿度/(%)
16：10	30000	1.5	东北	17
16：11	30000	1.3	东北	17
16：12	30000	1.1	东北	17
16：13	30000	1.1	东北	17
16：14	30000	0.9	东北	17
16：15	30000	0.7	北	17
16：16	30000	0.6	西北	17
16：17	30000	0.6	西北	17
16：18	30000	0.8	西北	17
16：19	30000	1.1	西北	17
16：20	19445	1.2	西北	18
16：21	3958	1.5	西南	25
16：22	3423	1.8	西南	34
16：23	3099	1.3	西南	36
16：24	3124	0.8	西南	36
16：25	3100	0.6	西	36
16：26	3066	0.6	南	37
16：27	3074	0.8	东南	38
16：28	3085	0.8	东南	38
16：29	3051	0.5	东南	38
16：30	3002	0.6	东南	39

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Analysis of the characteristics and influencing factors of a persistent fog and haze weather process in Dongli District, Tianjin

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