Scholarlink

<p>The co-occurrence of extreme weather events and air pollution events, such as elevated fine particulate matter (PM<sub>2.5</sub>) and ozone (O<sub>3</sub>), poses a significant threat to human health, a concern that is anticipated to be exacerbated under climate warming. Utilizing a 9-year dataset of surface air pollutant observations and reanalysis data, this study investigated the large-scale synoptic and weather drivers behind the co-occurrence of PM<sub>2.5</sub> and O<sub>3</sub> extremes in China. These co-occurrences are mostly observed during the warm season (March to October) and are particularly prevalent (25.8 days yr<sup>−1</sup>) in cleaner regions situated in South China. Such co-occurrences are usually associated with elevated air temperatures (∼27.7°C), lower wind speeds (∼1.4 m s<sup>−1</sup>) and atmospheric humidity (∼51.9%). Notably, a substantial proportion of these co-occurrences (up to 76.4%) coincide with extreme weather linked to stagnant weather and extreme heat conditions. By employing an objective clustering approach, we identified the typical synoptic systems conducive to the widespread co-occurrence of PM<sub>2.5</sub> and O<sub>3</sub> extremes, including the Western Pacific Subtropical High, Northeast Blocking High, Mongolian High, and typhoons. These findings underscore a robust correlation between the co-occurrence of PM<sub>2.5</sub> and O<sub>3</sub> extremes and the annual variations in extreme weather and prevailing weather patterns, suggesting an increased likelihood of concurrent air pollution and extreme weather episodes under a warming climate across China.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Large-scale synoptic and weather drivers for the co-occurrence of fine particulate matter and ozone extremes over China

  • 期刊论文

  • 发表日期：

    2025年4月9日

查看全文
  • Wei Wang,
  • Yiting Zhou,
  • Mengmeng Li,
  • Yuting Lu,
  • Xinyi Jiang,
  • Tijian Wang,
  • Bingliang Zhuang,
  • Shu Li,
  • Chenchao Zhan,
  • Xiaoyun Sun,
  • Xin Huang

摘要

The co-occurrence of extreme weather events and air pollution events, such as elevated fine particulate matter (PM2.5) and ozone (O3), poses a significant threat to human health, a concern that is anticipated to be exacerbated under climate warming. Utilizing a 9-year dataset of surface air pollutant observations and reanalysis data, this study investigated the large-scale synoptic and weather drivers behind the co-occurrence of PM2.5 and O3 extremes in China. These co-occurrences are mostly observed during the warm season (March to October) and are particularly prevalent (25.8 days yr−1) in cleaner regions situated in South China. Such co-occurrences are usually associated with elevated air temperatures (∼27.7°C), lower wind speeds (∼1.4 m s−1) and atmospheric humidity (∼51.9%). Notably, a substantial proportion of these co-occurrences (up to 76.4%) coincide with extreme weather linked to stagnant weather and extreme heat conditions. By employing an objective clustering approach, we identified the typical synoptic systems conducive to the widespread co-occurrence of PM2.5 and O3 extremes, including the Western Pacific Subtropical High, Northeast Blocking High, Mongolian High, and typhoons. These findings underscore a robust correlation between the co-occurrence of PM2.5 and O3 extremes and the annual variations in extreme weather and prevailing weather patterns, suggesting an increased likelihood of concurrent air pollution and extreme weather episodes under a warming climate across China.