Metadata about: The COVID-19 pandemic has escalated into one of the largest crises of the 21(st) Century. The new SARS-CoV-2 coronavirus, responsible for COVID-19, has spread rapidly all around the world. The Spanish Government was forced to declare a nationwide lockdown in view of the rapidly spreading virus and high mortality rate in the nation. This study investigated the impact of short-term lockdown during the period from March 15(th) to April 12(th) 2020 on the atmospheric levels of CO, SO(2), PM(10), O(3), and NO(2) over 11 representative Spanish cities. The possible influence of several meteorological factors (temperature, precipitation, wind, sunlight hours, minimum and maximum pressure) on the pollutants' levels were also considered. The results obtained show that the 4-week lockdown had significant impact on reducing the atmospheric levels of NO(2) in all cities except for the small city of Santander as well as CO, SO(2), and PM(10) in some cities, but resulted in increase of O(3) level.

About: The COVID-19 pandemic has escalated into one of the largest crises of the 21(st) Century. The new SARS-CoV-2 coronavirus, responsible for COVID-19, has spread rapidly all around the world. The Spanish Government was forced to declare a nationwide lockdown in view of the rapidly spreading virus and high mortality rate in the nation. This study investigated the impact of short-term lockdown during the period from March 15(th) to April 12(th) 2020 on the atmospheric levels of CO, SO(2), PM(10), O(3), and NO(2) over 11 representative Spanish cities. The possible influence of several meteorological factors (temperature, precipitation, wind, sunlight hours, minimum and maximum pressure) on the pollutants' levels were also considered. The results obtained show that the 4-week lockdown had significant impact on reducing the atmospheric levels of NO(2) in all cities except for the small city of Santander as well as CO, SO(2), and PM(10) in some cities, but resulted in increase of O(3) level.

an Entity references as follows:

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http://ns.inria.fr/covid19/graph/entityfishing	5
http://ns.inria.fr/covid19/graph/articles	3

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