长三角黑碳气溶胶时空分布特征研究

论文总字数：20045字

目 录

1.引言 1

2.材料与方法 2

2.1观测地点与时间 2

3.结果与讨论 4

3.1 黑碳气溶胶空间分布特征 4

3.2 时间变化 4

3.2.1黑碳气溶胶季节变化 4

3.2.2 黑碳气溶胶浓度的日变化特征 6

3.4 黑碳气溶胶浓度月变化及主要气象影响因子讨论 6

3.5 黑碳气溶胶与其他污染物相关性分析 9

3.5.1 黑碳浓度与空气质量指数（AQI）的关系 9

3.5.2 不同季节黑碳占比情况 10

3.5.3 黑碳气溶胶与示踪气体浓度的关系 11

3.6 黑碳气溶胶来源分析 13

4. 结论 14

参考文献： 15

致谢 17

长三角地区黑碳气溶胶时空分布特征

戴明明

，China

Abstract: The spatiotemporal distribution characteristics and influencing factors of BC in the Yangtze river delta region were discussed, and the correlation between black carbon aerosol and major air pollutants were analyzed by using the data of black carbon aerosol（BC）in the three sites of Nanjing, Dongshan and Shouxian in 2017, along with the historical data of air quality in the national cities. The result indicates that the annual average concentration of BC in Nanjing, Dongshan and Shouxian is 21261067,33331806 and 2237 respectively. The variation of the average concentration of black carbon in three stations is characterized by low in Summer and Autumn and high in Winter and Spring. Diurnal variations of seasonal BC concentrations in Nanjing, Dongshan and Shouxian all have obvious peak and valley values. The maximum value occurs around 7 to 8 a.m, and the minimum is around 14 p.m. The diurnal variation characteristics of the three observation stations indicated that the variation characteristics of BC were influenced by solar radiation, human production activities, inversion of temperature stratification and diffusion conditions. Precipitation is the important reason for low carbon aerosol concentration in Dongshan station in September. Black carbon aerosol concentration is positively correlated with air quality. Black carbon concentration can reflect regional pollution and is an important factor to measure regional environmental level. The black carbon ratio in is lower in summer than in winter, which could be explained that the growth rate of black carbon was less than that of secondary pollutants and the government emission reduction measures are implemented. Black carbon aerosols are positively correlated with and , which indicates that they have a common source. Black carbon aerosol concentration is positively related with CO. The proportion of biomass burning in Nanjing observation station is lower than that of Dongshan station, which is related to its location condition. The biomass combustion ratio of Dongshan was showed a maximum value in May, November and December, which is affected by the burning of straw. The Δ BC/Δ CO of Shouxian was 0.00277, lower than 0.00397 Dongshan, which explains that black carbon concentration had a greater influence on the biomass combustion emissions in Shouxian.

Key words: black carbon; spatial and temporal distribution; correlation analysis; Yangtze river delta region; source apportionment

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