2015-2020年中国北部近地臭氧度和潜在来源区域的时空空间动态
Kang Ma1,2, Yuesheng Lin1,2, Fengman Fang1,2
1School of Geography and Tourism, Anhui Normal University, Wuhu, 241002, China.
概括
中国北部近地表面臭氧污染是一个主要的空气质量问题. 这项研究表明,工业和交通排放对臭氧水平产生重大影响,需要区域控制策略.
科学领域:
- 环境科学 环境科学
- 大气化学 大气化学
- 空气质量管理 管理空气质量
背景情况:
- 接近地表的臭氧 (O3) 是中国北部城市空气污染的主要污染物.
- 氧气3运输和来源的时空动态尚不清楚.
- 运输在O3形成中的作用可能被低估了.
研究的目的:
- 调查中国北部的O3传输路径,潜在来源地区和驱动因素.
- 分析O3度的时空变化.
- 评估气象和非气象因素对O3污染的影响.
主要方法:
- 使用了HYSPLIT,PSCF,CWT和GTWR模型.
- 从2015年至2020年对表面O3度 (MDA8的第90百分位数) 的分析.
- 确定空气质量轨迹和源区域.
主要成果:
- 平均O3度为172±29μg/m3;度从2015-2018年增加,然后下降.
- 在工业城市中发现了高O3度,从西北向东南的空间转移.
- 来自新疆和西伯利亚的长途航线主导了北京的空气流量 (78.60%),山东半岛贡献了21.40%.
结论:
- 温度和相对湿度是主要的气象驱动因素.
- 人口密度,次要产业,工业排放和旅客流量是关键的非气象因素.
- 工业和交通排放对O3有重大影响,强调需要区域减缓和共同控制努力.
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