在空气污染条件下对大气稳定性指数和参数的分析
1Department of Meteorological Engineering, University of Samsun, 19 Mayis, Samsun, Turkey. veli.yavuz@samsun.edu.tr.
Environmental monitoring and assessment
|July 12, 2023
概括
大气稳定性对空气质量产生重大影响. 这项研究发现,稳定性参数,而不是指数,更好地预测了伊斯坦布尔PM2.5和NO2等高空气污染物度,通常与反转层有关.
科学领域:
- 大气科学 大气科学
- 环境科学环境科学
- 空气质量研究研究
背景情况:
- 大气稳定性是影响空气污染物度的关键因素.
- 稳定的大气条件可能导致污染物水平升高,降低区域空气质量.
研究的目的:
- 研究大气稳定性指数/参数与空气污染物度之间的关系.
- 分析10年的伊斯坦布尔空气质量数据,以了解污染事件.
主要方法:
- 在十年 (2013-2022) 期间,对PM10,PM2.5,SO2,NO2,CO和O3度进行统计分析.
- 在145个已识别的污染事件日内,对5个稳定性指数 (SI,LI,SWEAT,KI,TTI) 和3个稳定性参数 (CAPE,CIN,BRN) 的评估.
- 在事件日期间分析大气垂直倒置层.
主要成果:
- 稳定性参数 (CAPE,CIN,BRN) 在识别空气污染物度高的时期中,被发现比稳定性指数 (SI,LI,SWEAT,KI,TTI) 更有效.
- 纵向倒置层出现在145个插曲日中的122个插曲日.
- 这些反向层主要发生在表面和850hPa水平 (84%) 之间,厚度在0-250m (84%) 之间.
结论:
- 与传统的稳定性指数相比,大气稳定性参数更好地表明导致高空气污染事件的条件.
- 低层垂直倒置层的存在和特征与伊斯坦布尔的严重空气污染事件密切相关.
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