基于多波段连续监测的济南市含碳气溶胶来源解析

张文静; 孙庆华; 杜艳君; 崔亮亮; 张迎建; 李湉湉; 王彦文

doi:10.13421/j.cnki.hjwsxzz.2021.06.015

基于多波段连续监测的济南市含碳气溶胶来源解析

Source Appointment of Carbon-Containing Aerosols based on Multi-wavelength Continuous Monitoring

摘要

摘要:
目的通过光学技术监测多个波段的含碳气溶胶浓度, 讨论含碳气溶胶的污染来源。
方法 2019年12月16—18日, 采用微型多波段气溶胶监测仪器在山东省济南市连续监测含碳气溶胶的质量浓度。
结果 12月16日早上9时至12月17日早上4时, 吸收指数(AAE, α)从大于1.5平缓下降至1左右, 表明此监测时段主要的气溶胶来源从生物质燃烧源逐渐转变为机动车燃烧源; 12月17日早上4时至12月17日中午12时, α值在1附近波动, 表明此监测时段主要的气溶胶来源为机动车燃烧源; 12月17日中午12时至12月18日早上3时, α值从1逐渐上升至2左右, 表明此监测时段主要的气溶胶来源从机动车燃烧源逐渐转变为生物质燃烧源。
结论含碳气溶胶的主要来源会随时间发生变化, 且日间的主要来源多为机动车燃烧源, 而生物质燃烧源为主要来源的情形多出现于夜间。

Abstract:
Objective To investigate the source of carbon-containing aerosol by monitoring the concentration of carbon-containing aerosol in multiple wavebands based on optical technology.
Methods During December 16-18, 2019, a miniature multi-band aerosol monitoring instrument was used to continuously monitor the mass concentration of carbon-containing aerosol in Jinan of Shandong province, China.
Results From 9 a.m. December 16 to 4 a.m. December 17, the Absorption Exponent (AAE, α) gradually decreased from greater than 1.5 to about 1, indicating that the main aerosol source in this monitoring period gradually changed from biomass combustion to motor vehicle combustion. the α value fluctuated around 1 from 4 a.m. to 12 a.m. December 17, indicating that the main aerosol source in this monitoring period was motor vehicle combustion. from 12 a.m. December 17 to 3 a.m. December 18, the α value gradually increased from 1 to about 2, indicating that the main aerosol source in this monitoring period gradually changed from motor vehicle combustion to biomass combustion.
Conclusion The main source of carbon-containing aerosol changes with time, mainly from motor vehicle combustion in daytime and biomass combustion at night.

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