Characteristics of dust events and their influence on air quality of Yulin， Shaanxi， China

doi:10.7522/j.issn.1000-694X.2020.00128

Journal of Desert Research ›› 2021, Vol. 41 ›› Issue (2): 59-66.DOI: 10.7522/j.issn.1000-694X.2020.00128

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Characteristics of dust events and their influence on air quality of Yulin， Shaanxi， China

Juan Cui¹(), Hao Wang¹, Jie Liu¹, Yue Wang², Lidong Lu¹, Jie Chen¹

^1.Shaanxi Provincial Academy of Environmental Science，Xi’an 710061，China
^2.Climate Center of Shaanxi Meteorological Bureau，Xi’an 710014，China

Received:2020-10-09 Revised:2020-12-13 Online:2021-03-20 Published:2021-03-26

Abstract

Abstract:

Few studies were concerned in the quantitative influence of dust events on air quality of Yulin， China. Based on daily dust event and air quality data from 2013 to 2018， the relative and the absolute contributions of dust events were analyzed， on the air quality index （AQI）， inhalable particles （PM₁₀）， and fine particles （PM_2.5） concentrations. The results showed that the contribution rate of dust events on AQI were in the range of 0.7%-11.1% （annual average： 6.4%±3.8%）. The absolute contribution of dust events on PM₁₀ was within the scope of 1.0-13.1 μg·m^-3， and the annual average was 8.2±5.4 μg·m^-3， corresponding to 5.4%±3.5% of the relative contribution. The impact of dust events on PM_2.5 was smaller than that on PM₁₀， with the absolute contribution ranged from -0.4 to 3.5 μg·m^-3. The seasonal variation of dust events on air quality of Yulin was significant， with the bigger contribution in spring， and smaller in autumn and winter. The impacts of dust events in urban and outskirts areas were different， maybe related to local meteorological and topographical conditions.

Key words: dust events, air quality index, inhalable particles, fine particles

CLC Number:

X513

Juan Cui, Hao Wang, Jie Liu, Yue Wang, Lidong Lu, Jie Chen. Characteristics of dust events and their influence on air quality of Yulin， Shaanxi， China[J]. Journal of Desert Research, 2021, 41(2): 59-66.

Figures/Tables 8

References 31

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月份	沙尘天气日数/d			沙尘天气日数占比/%			对PM₁₀绝对贡献/（μg·m^-3)			对PM₁₀相对贡献率/%			对PM_2.5绝对贡献/（μg·m^-3)			对PM_2.5相对贡献率/%
月份	榆阳	定边	清涧	榆阳	定边	清涧	榆阳	定边	清涧	榆阳	定边	清涧	榆阳	定边	清涧	榆阳	定边	清涧
全年	27	123	15	12.7	36.7	9.9	8.2	6.3	1.2	5.4	4.2	0.8	1.3	1.7	-0.2	1.7	2.2	-0.3
1		7	4		22.6	12.9		4.9	-2.2		3.2	-1.4		1.8	-1.4		2.4	-1.8
2	2	9	3	7.1	32.1	10.7	11.0	5.4	-1.6	7.3	3.6	-1.1	0.1	-0.4	-0.9	0.2	-0.5	-1.2
3	6	23	4	19.4	74.2	12.9	12.5	11.9	2.7	8.3	7.9	1.8	1.1	0.7	0.5	1.5	0.9	0.7
4	7	23		23.3	76.7		12.4	7.9		8.3	5.2		2.1	2.9		2.8	3.8
5	9	22	3	29.0	71.0	9.7	13.1	6.6	4.8	8.8	4.4	3.2	3.5	1.5	0.6	4.7	2.0	0.8
6	1	11		3.3	36.7		6.0	3.2		4.0	2.1		1.0	0.2		1.3	0.3
7	1	8	1	3.2	25.8	3.2	1.2	0.4	2.1	0.8	0.2	1.4		0.2	0.2		0.3	0.2
8		4			12.9			2.5			1.7
9
10		1			3.2
11		6			20.0			10.8			7.2			3.6			4.8
12	1	9		3.2	29.0		1.0	9.8		0.7	6.5		-0.4	4.7		-0.5	6.3

月份	沙尘天气日数/d			沙尘天气日数占比/%			对PM₁₀绝对贡献/（μg·m^-3)			对PM₁₀相对贡献率/%			对PM_2.5绝对贡献/（μg·m^-3)			对PM_2.5相对贡献率/%
月份	榆阳	定边	清涧	榆阳	定边	清涧	榆阳	定边	清涧	榆阳	定边	清涧	榆阳	定边	清涧	榆阳	定边	清涧
全年	27	123	15	12.7	36.7	9.9	8.2	6.3	1.2	5.4	4.2	0.8	1.3	1.7	-0.2	1.7	2.2	-0.3
1		7	4		22.6	12.9		4.9	-2.2		3.2	-1.4		1.8	-1.4		2.4	-1.8
2	2	9	3	7.1	32.1	10.7	11.0	5.4	-1.6	7.3	3.6	-1.1	0.1	-0.4	-0.9	0.2	-0.5	-1.2
3	6	23	4	19.4	74.2	12.9	12.5	11.9	2.7	8.3	7.9	1.8	1.1	0.7	0.5	1.5	0.9	0.7
4	7	23		23.3	76.7		12.4	7.9		8.3	5.2		2.1	2.9		2.8	3.8
5	9	22	3	29.0	71.0	9.7	13.1	6.6	4.8	8.8	4.4	3.2	3.5	1.5	0.6	4.7	2.0	0.8
6	1	11		3.3	36.7		6.0	3.2		4.0	2.1		1.0	0.2		1.3	0.3
7	1	8	1	3.2	25.8	3.2	1.2	0.4	2.1	0.8	0.2	1.4		0.2	0.2		0.3	0.2
8		4			12.9			2.5			1.7
9
10		1			3.2
11		6			20.0			10.8			7.2			3.6			4.8
12	1	9		3.2	29.0		1.0	9.8		0.7	6.5		-0.4	4.7		-0.5	6.3

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Characteristics of dust events and their influence on air quality of Yulin， Shaanxi， China

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