Guo Qian, Wu Dongyou, Yu Chunxue, Wang Tianshuang, Ji Mingxia, Wang Xin
Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China.
Research Center for Eco-environmental Engineering, Dongguan University of Technology, Dongguan 523808, China.
J Environ Sci (China). 2022 Apr;114:308-321. doi: 10.1016/j.jes.2021.09.006. Epub 2022 Feb 23.
Episodes of fine-particulate matter (PM) pollution are a widespread and common occurrence in China, and have potentially serious implications for human health. Meteorological conditions play an important role in air quality and influence the formation of regional air pollution episodes. This study applied a new classification method and daily PM concentration data to (a) evaluate different levels of air pollution in the Sichuan-Chongqing region between 2015 and 2017, and (b) investigate their relationships with meteorological parameters including atmospheric boundary layer height, wind speed, temperature inversion, weather type, and atmospheric transport. We identified a total of 40 air pollution episodes, the most severe of which occurred in winter when the atmospheric layer height was low. These heavy pollution events also coincided with low surface (10 m) wind speeds and temperature inversions, weather conditions that generally result from low pressure over the northwestern Sichuan Basin (90-102° E, 28-36° N) and southerly atmospheric transport.
细颗粒物（PM）污染事件在中国广泛且常见，对人类健康可能产生严重影响。气象条件在空气质量中起着重要作用，并影响区域空气污染事件的形成。本研究应用一种新的分类方法和每日PM浓度数据，（a）评估2015年至2017年川渝地区不同程度的空气污染，（b）研究其与包括大气边界层高度、风速、逆温、天气类型和大气输送在内的气象参数之间的关系。我们共识别出40次空气污染事件，其中最严重的发生在冬季，此时大气层高度较低。这些重度污染事件还与地表（10米）低风速和逆温同时出现，这种天气状况通常是由四川盆地西北部（东经90 - 102°，北纬28 - 36°）的低压和南风大气输送导致的。
