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基于移动-DOAS的合肥城市空气污染物的时空分布和排放

Zhidong Zhang¹, Pinhua Xie², Ang Li³

¹School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230026, China; Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.

Journal of environmental sciences (China)

|October 31, 2024

概括

在合肥的移动DOAS测量显示了季节性空气污染模式. 交通拥堵导致甲 (HCHO) 和二氧化 (NO2) 峰值,而二氧化硫 (SO2) 与冬季供暖和工业有关.

科学领域:

大气化学大气化学
环境科学环境科学
城市污染的动态

背景情况:

合肥是长江三角洲的一个重要城市,由于经济快速增长和城市扩张,它面临着不断变化的空气污染挑战.
最近关于合肥大气污染物的时空分布和排放的研究是有限的.
了解这些动态对于快速发展的城市地区的有效环境管理至关重要.

研究的目的:

调查合肥大气污染物的时空分布和排放特征.
评估城市发展和交通政策对空气质量的影响.
为未来的空气污染控制战略提供数据支持.

主要方法:

在2021年6月至2022年5月的城市道路上使用移动DOAS仪器进行移动观测.
通过对TROPOMI卫星数据和地面监测站数据进行验证的监测结果.
使用移动测量数据估计的城市氧化 (NOx) 排放流量.

主要成果:

污染物度显示出明显的季节性变化和空间异质性.
高度的甲 (HCHO) 和二氧化 (NO2) 与交通拥堵相关.
较高的二氧化硫 (SO2) 含量与冬季供暖和工业活动有关.
道路政策的实施导致车辆平均速度增加了95.4%,一氧化 (NO) 度下降了54.4%.
移动测量显示,与库存数据相比,NOx排放的季节性模式更明显,冬季的比例更高.
空间分析表明,主要的NOx排放源位于内外环路之间.

结论:

移动DOAS测量为合肥城市空气污染动态提供了宝贵的见解.
交通排放是HCHO和NO2污染的重要贡献者,而SO2与季节性供暖和工业有关.
交通管理政策可以有效地降低特定污染物度,改善交通流量.
该研究为制定城市环境中针对性空气污染控制措施提供了关键数据.

关键词:

我们的 HCHO 是 HCHO.移动-DOASAS 是一个移动的DOAS.NO ((2)) 的情况.NO (x) 的排放量.SO(2) 这样一来.时间空间分布的分布.

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