[在广州盆地阳市的PM2.5污染的时空分布和潜在来源区域]
Yong-Pei Hao1, Xiao-Wei Song1, Xiao-Dong Zhu2
1College of Resources and Environment, Shanxi University of Finance & Economics, Taiyuan 030006, China.
Huan jing ke xue= Huanjing kexue
|December 25, 2024
概括
阳市的PM2.5污染在2014-2021年间波动,在2016年达到峰值. 高度发生在冬季和南部/中部地区,受周边地区西北和西部空气流的影响.
科学领域:
- 环境科学 环境科学
- 大气化学 大气化学
- 空气质量监测 空气质量监测
背景情况:
- 颗粒物 (PM2.5) 对公众健康和环境构成重大风险.
- 了解PM2.5的时空变化和来源对于有效的污染控制至关重要.
研究的目的:
- 从2014年到2021年,分析西阳市PM2.5污染的时间和空间特征.
- 确定研究区域中PM2.5污染的主要来源地区和贡献因素.
主要方法:
- 利用了PM2.5度数据 (2014-2021年) 和全球数据同化系统 (GDAS).
- 采用逆向轨迹集群,潜在源贡献函数 (PSCF) 和度加权轨迹 (CWT) 分析.
- 应用统计方法来调查污染变化和来源特征.
主要成果:
- PM2.5度波动,在2016年达到峰值 (81.25 μg·m−3),在秋季/冬季水平较高 (冬季为116 μg·m−3),在春季/夏季水平较低 (夏季为31.58 μg·m−3).
- 污染集中在西安南部和中部,受西北空气流在寒冷的月份和夏季短途运输的影响.
- 潜在的来源区域从西北到东南延伸,包括内蒙古,甘,宁夏和河南的部分地区,冬季显示最广泛的高价值来源区域.
结论:
- 阳的PM2.5污染是由当地和地区的来源驱动的,在严重的污染事件中,西部空气流量显著.
- 有效的减排需要严格的本地排放控制和区域合作,以应对跨境污染.
- 特定的高潜力源地区的有针对性的干预措施,特别是在冬季,对于改善空气质量至关重要.
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