摘要
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 15th to April 12th 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.
基金
Financial support was received from the Universitat de València for the VLC-CAMPUS“Atraccióde Talent”PhD fellowship(awarded to C.B-S)
the Fundación Universidad Católica de Valencia San Vicente Mártir through Grant 2019–231–003UCV(awarded toá.S-A)。
