论文标题
COVID-19锁定改善摩洛哥的空气质量
Covid-19 lockdown improves air quality in Morocco
论文作者
论文摘要
由于1920年3月15日，由于1920年3月15日，摩洛哥的几乎所有非必需活动都已停止。从这个意义上讲，已经采取了一些措施来减轻这种大流行的影响。自2020年3月20日以来，摩洛哥一直在封锁。本文的主要目的是基于Sentinel 5p和Merra的卫星数据来研究锁定措施对空气质量的影响，以呈现PM2,5和NO2污染物的时空演化。然后，将这些结果与哥白尼大气监测服务（CAM）预测的数据进行了比较。结果表明，一方面，摩洛哥通过NO2的显着降低和PM2,5的相对减少而改善了空气质量。另一方面，我们证明了摩洛哥的颗粒污染部分是由于概要天气模式，而No2排放的很大一部分主要来自摩洛哥北部边界。最后，我们表明PM2,5凸轮全球预测低估了观察到的MERRA数据。
Due to the Covid-19 pandemic, almost all non-essential activities in Morocco have been halted since March 15, 2020. In this sense, several measures have been taken to mitigate the effects of this pandemic. Morocco has been on lockdown since March 20, 2020. The main objective of this paper is to study the effects of the lockdown measures on air quality, by presenting the spatio-temporal evolution of PM2,5 and NO2 pollutants, based on satellite data from Sentinel 5P and MERRA. Then, these results are compared to the data predicted by the Copernicus Atmosphere Monitoring Service (CAMS). Results show that, on one hand, Morocco has experienced an improvement in air quality by a significant reduction in NO2 and a relative reduction in PM2,5. On the other hand, we demonstrate that the particulate pollution in Morocco is partly due to synoptic weather patterns, and that a significant part of NO2 emissions is incoming mainly from the outside northern borders of Morocco. Finally we show that PM2,5 CAMS global forecasts underestimate the observed MERRA data.
