河源市空气质量首要污染物特征及其与气象条件的关系

doi:10.3969/j.issn.1673-503X.2022.01.006

Abstract

Abstract:

Based on the air quality monitoring data in Heyuan from 2017 to 2019, the interannual variation of primary air pollutants was analyzed in this study.The correlation analysis between the concentrations of primary air pollutants and meteorological conditions was conducted using the data at the Dongpu national observational station in 2019, and the impact of the meteorological conditions on typical air pollution events was also explored.The results showed that the proportion of polluted days with fine particle matter (PM_2.5) as the primary air pollutant decreases significantly, and the polluted days with ozone (O₃) as the primary air pollutant increase, which means the particulate matter pollution gradually transfers to ozone pollution in Heyuan.O₃ concentrations are positively correlated with temperature and negatively correlated with humidity.High concentrations of O₃ mainly concentrate within the thresholds (20-30℃, 25%-55%), and also occur under north-northwesterly winds.PM_2.5 and PM₁₀ concentrations are negatively correlated with humidity and tend to have high values when temperature and humidity are within the ranges of 8-13℃ and 40%-50%, respectively.In summer, PM_2.5 and PM₁₀ show a strong positive correlation with temperature, which means the combined PM and ozone pollution is possible to occur under high-temperature conditions in Heyuan.The typical pollution days in Heyuan are characterized by weak winds and unfavorable local dispersion conditions.PM pollution tends to occur under low temperature and low humidity conditions and is mainly affected by regional transport.O₃ pollution tends to occur under high temperature and low humidity conditions and can be exacerbated in the presence of high precursor concentrations.

Key words: Air pollution, Primary pollutants, Meteorological conditions, Correlation analysis

CLC Number:

Hui ZHANG,Chu WU,Jing-wei ZHANG,Xiao-ping LIN,Jia-quan LIANG,Su LIU,Yan-fang GUO,Cheng-liu LI. Characteristics of primary pollutants of air quality and their relationships with meteorological conditions in Heyuan[J]. Journal of Meteorology and Environment, 2022, 38(1): 40-47.

Figures/Tables 10

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References 25

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年份	空气质量类别/d				AQI达标率	首要污染物浓度/(μg·m^-3)
年份	优	良	轻度污染	中度污染	AQI达标率	PM_2.5	PM₁₀	O₃	NO₂
2017年	172	179	14	0	96.2%	27	44	125	21
2018年	200	156	8	1	97.5%	27	41	132	19
2019年	198	159	8	0	97.8%	24	42	131	22

时期	首要污染物	风速	气压	温度	湿度
全年	O₃	-0.121^*	-0.164^**	0.451^**	-0.575^**
	NO₂	-0.320^**	0.453^**	-0.380^**	-0.311^**
	PM_2.5	-0.075	0.463^**	-0.210^**	-0.569^**
	PM₁₀	-0.165^**	0.316^**	-0.035	-0.640^**
春季	O₃	-0.213^*	-0.145	0.516^**	-0.730^**
	NO₂	-0.494^**	0.117	-0.087	0.059
	PM_2.5	-0.204	0.203	0.212	-0.593^**
	PM₁₀	-0.470^**	-0.109	0.556^**	-0.609^**
夏季	O₃	0.001	-0.255^*	0.520^**	-0.579^**
	NO₂	-0.277^**	0.015	0.019	0.064
	PM_2.5	0.012	-0.369^**	0.620^**	-0.570^**
	PM₁₀	0.047	-0.291^**	0.721^**	-0.634^**
秋季	O₃	-0.230^*	-0.086	0.363^**	-0.535^**
	NO₂	-0.530^**	0.320^**	-0.373^**	-0.195
	PM_2.5	-0.376^**	0.315^**	-0.08	-0.273^**
	PM₁₀	-0.385^**	0.349^**	-0.245^*	-0.410^**
冬季	O₃	-0.194	0.004	0.218	-0.696^**
	NO₂	-0.654^**	-0.153	0.248^*	-0.248^*
	PM_2.5	-0.426^**	-0.147	0.361^**	-0.282^*
	PM₁₀	-0.472^**	-0.124	0.355^**	-0.432^**

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Characteristics of primary pollutants of air quality and their relationships with meteorological conditions in Heyuan

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