通知机场附近卫星 NO2 采集使用潘多拉天空扫描观测的数据
Asher P Mouat1, Elena Spinei2, Jennifer Kaiser1,3
1School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.
概括
机场对空气质量产生重大影响,在不同高度释放二氧化 (NO2). 这项研究显示,航空排放在较低大气层均分布,改善了机场附近的空气污染监测.
科学领域:
- 大气化学 大气化学
- 空气质量监测 空气质量监测
- 遥感 遥感 遥感 遥感
背景情况:
- 机场是二氧化 (NO2) 排放的主要来源,由于污染物增加,对精确的跟踪提出了挑战.
- 靠近机场的卫星NO2观测显示出热点,但往往由于不确定的垂直分布和空气质量因子 (AMF) 计算而受到偏差.
研究的目的:
- 通过在主要国际机场附近进行地面测量,评估航空对NO2垂直配置的影响.
- 将观察到的NO2垂直分布与模型模拟进行比较,并评估卫星数据检索偏差.
主要方法:
- 在哈茨菲尔德-杰克逊国际机场附近部署了紫外线光谱仪 (Pandora 1S,SciGlob) 13个月.
- 利用天空扫描的潘多拉观测来区分机场羽毛与城市背景NO2.
- 将地面观测的NO2概况与戈达德地球观测系统 (GEOS) 组成预测 (CF) 模型模拟进行了比较.
主要成果:
- 航空排放被发现增加了机场的NO2度,在混合层中分布相对均.
- 在GEOS-CF模型中,低估了NO2混合高度,与距离2.5公里的观测相比,将更多的NO2归因于表面.
- 从合并观测 (AMF_Fused) 和 GEOS-CF (AMF_GEOS-CF) 获得的空气质量因子 (AMF) 在评估TROPOMI NO2.2时显示了类似的结果.
结论:
- 基于地面的天空扫描观测为了解机场附近的NO2垂直分布提供了关键数据.
- 结合地面和卫星方法提高了评估城市环境中复杂排放分布的准确性.
- 这项研究强调了考虑垂直NO2配置文件对于改善空气质量模型和在排放源附近的卫星检索的重要性.
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