地静止卫星总臭氧观测:对TEMPO和GEMS的地面网络验证工作的第一个结果
Xiaoyi Zhao1, Debora Griffin1, Vitali Fioletov1
1Air Quality Research Division, Environment and Climate Change Canada, Toronto, ON, Canada.
概括
热带气体排放:污染监测 (TEMPO) 卫星为北美提供每小时的臭氧数据. 它的测量与地面网络保持一致,显示其跟踪空气质量变化的能力.
科学领域:
- 大气科学 大气科学
- 遥感 遥感 遥感 遥感
- 环境监测 环境监测
背景情况:
- 热带气体排放:污染监测 (TEMPO) 仪器是北美第一个地球静止空气污染卫星,于2023年4月发射.
- 与亚洲的GEMS和欧洲的Sentinel-4一起,TEMPO增强了全球地球静止卫星覆盖范围,用于空气质量监测.
- 时间和GEMS提供每小时,高分辨率的臭氧数据,显著提高时间分辨率超过每日卫星观测.
研究的目的:
- 呈现TEMPO的总臭氧数据,并评估其观察臭氧和紫外线指数快速变化的能力.
- 将TEMPO和GEMS卫星测量与地面监测网络进行验证.
- 评估TEMPO和GEMS数据的性能与TROPOMI和再分析模型相比.
主要方法:
- 来自TEMPO仪器的总臭氧柱数据的分析.
- 卫星数据的验证,使用来自布鲁尔,多布森和潘多拉网络的地面测量.
- 将TEMPO和GEMS数据与TROPOMI卫星观测和大气再分析模型进行比较.
主要成果:
- 泰莫表现出强大的检测总臭氧和紫外线指数突然变化的能力.
- 在卫星 (TEMPO,GEMS) 和地面测量之间发现了良好的一致性.
- 观察到取决于度的差异,TEMPO的差异为-2%至2%,GEMS的差异为-1%至-3%.
结论:
- 时间是监测北美空气污染的宝贵工具,具有高时间分辨率.
- 当与地面网络进行验证时,来自TEMPO和GEMS的卫星衍生臭氧数据显示出高准确性.
- 需要进一步的研究来理解和解决卫星数据中观察到的依赖度的差异.
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