在德克萨斯州休斯顿,邻居层次的二氧化不平等导致了表面臭氧的变化
Isabella M Dressel1, Sixuan Zhang1, Mary Angelique G Demetillo1,2
1Department of Environmental Sciences, University of Virginia, Charlottesville, Virginia 22904, United States.
概括
休斯顿的二氧化 (NO2) 污染不成比例地影响了少数民族社区. 有针对性的排放控制可以减少二氧化的差异和高臭氧天,使所有居民受益.
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:
- 二氧化 (NO2) 空气污染不成比例地影响了德克萨斯州休斯顿的少数民族社区.
- 高臭氧 (O3) 日常发生,由于缺乏时间变化的测量,对邻里层面的NO2不平等的理解是有限的.
研究的目的:
- 评估每日TROPOSpheric监测仪器 (TROPOMI) NO2热带层垂直柱密度 (TVCDs) 的能力,以解决休斯顿人口普查区规模的NO2不平等问题.
- 评估TROPOMI TVCDs在2018年5月至2022年11月分析NO2不平等的应用.
- 研究休斯顿NO2不平等,高臭氧日和空气流之间的关系.
主要方法:
- 将TROPOMI NO2 TVCD与空中遥感数据 (NASA TRACER-AQ) 进行比较,以验证NO2不平等测量.
- 分析每日TROPOMI TVCD对人口普查区规模NO2不平等的分析,包括过量采样和对柱面关系的检查.
- 应用主要组件和集群分析来识别NO2不平等,高O3日和中等层空气流之间的共变.
- 开发一个通用的添加模型来探索O3混合比率和NO2不平等之间的关系.
主要成果:
- 每日TROPOMI NO2 TVCD有效地捕获了休斯顿人口普查区范围内的NO2不平等的很大一部分.
- 二氧化的不平等,全市高氧气3天和中等空气流显示出明显的共变性.
- 这项研究提供了观察证据,将邻近水平的NO2不平等与O3水平联系起来,证实了O3生产中的非线性关系.
结论:
- 针对休斯顿黑人,拉丁裔和亚洲社区的二氧化差异的排放控制策略可以产生共同利益.
- 这些有针对性的控制可以同时减少NO2不平等,并缓解整个城市频繁出现的高O3天.
- 这些发现强调了空气污染物的相互联系以及公平的环境政策的潜力.
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