气溶负荷的空间分布和气溶光学深度变化的评估,使用热带地区的多方法观测
Najib Yusuf1,2,3, Rabia S Sa'id3
1NASRDA'S Centre for Atmospheric Research (CAR), Anyigba, Kogi State, Nigeria.
Heliyon
|August 17, 2023
概括
这项研究验证了使用卫星数据和模型对尼日利亚地面AERONET数据进行的气溶光学深度 (AOD) 测量. 调查结果显示了良好的协议,这对于改善空气质量评估至关重要.
科学领域:
- 大气科学 大气科学
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
背景情况:
- 气溶光学深度 (AOD) 对于空气质量评估至关重要.
- 准确的AOD数据对于了解大气过程和气候影响至关重要.
- 对于可靠的空气质量监测,需要对AOD数据集进行验证.
研究的目的:
- 评估和验证来自联合数据集的AOD测量,以改善尼日利亚的空气质量评估 (2005-2020年).
- 将CAM6-chem模型和MERRA-2再分析的AOD输出与卫星检索 (MODIS,MISR) 和AERONET地面数据进行比较.
- 分析气溶的空间分布和来源,包括沙漠尘埃,有机物质和黑碳.
主要方法:
- 使用来自尼日利亚伊洛林的气溶机器人网络 (AERONET) 数据作为基本真相参考.
- 通过化学 (CAM6-chem) 和研究和应用 (MERRA-2) 的现代时代回顾分析,比较了社区大气模型版本6的AOD数据.
- 从中等分辨率成像光谱辐射计 (MODIS) 和多角度成像光谱辐射计 (MISR) 与 AERONET 数据进行验证的 AOD 检索.
主要成果:
- 空间分析显示,撒哈拉北部和西撒哈拉地区的AOD值很高,沙漠尘埃是北非和西非地区的主要贡献者.
- 黑碳在尼日利亚的石油和天然气勘探地点附近显示出最大的负担.
- 使用线性相关性进行的相互比较表明,卫星/再分析数据和AERONET之间存在很高的一致性 (r = 0.8640.973),在雨季和雨季前的季节有很强的相关性.
结论:
- 卫星和基于模型的AOD数据通常与AERONET测量结果一致,支持它们在空气质量研究中的使用.
- MERRA-2,MISR和MODIS AOD通常低估了AERONET值,而CAM6-chem也显示了较低的AOD和灰尘负担.
- 该研究强调了验证各种AOD数据集对于可靠的空气质量评估和大气研究的重要性.
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