2015年华北地区上甸子大气本底站PM2.5化学组分特征及来源分析

doi:10.3969/j.issn.1673-503X.2023.06.011

Abstract

Abstract:

Based on the PM_2.5 sample data collected from Shangdianzi regional atmospheric background station in 2015, the variation characteristics of PM_2.5 mass concentration and its chemical components were analyzed, and its sources were traced by mass closure, backward trajectory, and potential source contribution methods. The results show that the annual average PM_2.5 mass concentration at Shangdianzi station in 2015 was 44.9 μg·m^-3, with average concentrations of 58.1 μg·m^-3 in spring, 30.9 μg·m^-3 in summer, 39.7 μg·m^-3 in autumn, and 51.3 μg·m^-3 in winter. Compared with 2009 to 2010, they decreased by 33%, 56%, 46%, and 9% respectively. The annual average mass concentrations of SO₄^2-, NO₃^- and NH₄⁺ are 8.5±9.2, 6.4±8.3, and 3.9±4.7 μg·m^-3, respectively. The average annual concentrations of organic carbon and elemental carbon are 8.9±6.3 μg·m^-3 and 1.6±1.2 μg·m^-3, respectively. The daily average concentration ratio of NO₃^- to SO₄^2- is 0.82, which is higher than the observed results in 2004, 2012 and 2013. The main components of PM_2.5 are soil, organic matter, sulfates, and nitrates, accounting for 34%, 23%, 22%, and 15%, respectively. Compared with 2004, the proportion of sulfate in PM_2.5 at Shangdianzi station has decreased, while the proportion of soil components has increased. The PM_2.5 at Shangdianzi station primarily originates from the southern, northwestern, and northern of the station, and regional transmission from Hebei and Shandong provinces has a great impact on the high concentration of PM_2.5 in Shangdianzi Station.

Key words: Aerosol, Chemical composition, Backward trajectory

CLC Number:

X513

Xiaofang JIA,Yang LI,Xiaoqing SUN,Fan DONG. Characteristics and source analysis of PM_2.5 chemical components at the Shangdianzi regional background station in North China in 2015[J]. Journal of Meteorology and Environment, 2023, 39(6): 87-95.

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年份	颗粒物	春季	夏季	秋季	冬季	数据来源
2004年	PM_2.1	—	66.0	—	76.9	文献[15]
2005年	PM_2.5	40.8	64.7	47.9	31.4
2006年	PM_2.5	101.2	60.9	51.6	44.7	文献[19]
2007年	PM_2.5	59.8	58.5	45.1	44.3
2009年	PM_2.5	87.1	70.6	73.1	—	文献[20]
2010年	PM_2.5	—	—	—	56.3	文献[20]
2015年	PM_2.5	58.1±42.4	30.9±25.7	39.7±42.0	51.3±46.7	观测

时间	总离子	SO₄^2-	NO₃^-	NH₄⁺	Mg²⁺	Ca²⁺	K⁺	NO₃^-/SO₄^2-	数据来源
2004年夏季	—	24.45	5.81	13.05	0.18	3.74	1.25	0.23	文献[15]
2004年冬季	—	13.75	9.78	6.22	0.27	0.99	3.21	0.71	文献[15]
2015年春季	24.2±23.6	9.2±9.5	7.6±9.3	4.1±5.0	0.1±0.2	1.8±1.1	0.6±1.0	0.89	观测
2015年夏季	19.2±17.9	9.7±10.1	3.3±3.9	3.7±4.1	0.1±0.02	2.0±0.5	0.2±0.3	0.49
2015年秋季	21.4±23.9	7.8±9.0	7.3±9.4	4.1±5.2	0.04±0.02	1.2±0.4	0.4±0.4	0.97
2015年冬季	21.7±22.0	7.4±8.0	7.6±8.9	3.7±4.6	0.1±0.2	1.3±0.5	0.9±1.9	0.93
2015年均值	21.6±21.9	8.5±9.2	6.4±8.3	3.9±4.7	0.1±0.1	1.6±0.8	0.5±1.1	0.82

时间	OC/(μg·m^-3)	EC/(μg·m^-3)	相关系数	OC/EC	数据来源
2004年夏季	5.07±2.66	1.26±0.66	—	4.3	文献[15]
2004年冬季	19.11±14.45	4.33±3.81	—	5.2	文献[15]
2009年春季	9.70±4.30	3.80±2.40	—	2.6	文献[20]
2009年夏季	5.70±1.80	3.30±1.10	—	1.7
2009年秋季	10.70±4.30	3.90±1.80	—	2.7
2010年冬季	16.80±9.00	4.40±2.20	—	3.8
2015年春季	9.50±5.30	1.40±0.80	0.71	7.8	观测
2015年夏季	5.70±2.00	1.60±1.00	0.81	4.5
2015年秋季	8.90±6.00	1.70±1.30	0.92	6.5
2015年冬季	11.80±8.70	2.00±1.70	0.77	7.4
2015年年平均	8.90±6.30	1.60±1.20	0.75	6.6

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Characteristics and source analysis of PM_2.5 chemical components at the Shangdianzi regional background station in North China in 2015

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Characteristics and source analysis of PM_2.5 chemical components at the Shangdianzi regional background station in North China in 2015