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在2009年至2020年期间,利用卫星观测和数值模型评估北京HCHO:空间特征和影响因子

Jiachen Fan¹, Tijian Wang², Qingeng Wang¹

¹School of the Environment, Nanjing University, Nanjing 210023, China.

The Science of the total environment

|June 23, 2023

概括

北京的甲 (HCHO) 污染主要是由交通和工业驱动的,季节性差异显著影响臭氧水平. 自然因素和区域运输也影响城市地区的HCHO积累.

科学领域:

大气化学大气化学
环境科学环境科学
遥感遥感遥感遥感

背景情况:

甲 (HCHO) 是一种影响人类健康和大气的重要空气污染物.
由于地面数据有限,卫星观测对于监测HCHO至关重要.
了解HCHO的时空变化对于空气质量管理至关重要.

研究的目的:

分析2009年至2020年北京热层甲 (HCHO) 的时空变化.
研究臭氧 (O3) 对HCHO和二氧化 (NO2) 的反应.
确定影响HCHO变异和潜在来源区域的因素.

主要方法:

使用臭氧监测仪 (OMI) 卫星数据和WRF-Chem模型模拟的协同分析.
对HCHO柱度的时空分析.
在已识别的热点中对HCHO,NO2和臭氧 (O3) 的相关性分析.

主要成果:

2018年,HCHO柱度在北京东部达到峰值.
臭氧 (O3) 含量与HCHO和NO2光解呈正相关,尤其是在夏季.
运输排放是HCHO的最大贡献者,其次是工业和住宅来源.

结论:

人为排放,特别是来自运输的排放,主导了北京的HCHO水平.
自然来源 (异烯) 和气象条件在HCHO生产中起作用.
来自河北等地区的区域运输有助于HCHO污染,凸显了综合控制策略的必要性.

关键词:

我们的 HCHO 是 HCHO.影响因子的影响因子这是一个OMI OMI.时间空间分布的分布.这是WRF-Chem的产品.

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