论文标题
COVID-19的控制措施对中国，韩国和意大利的对流层的影响措施
Impacts of COVID-19 control measures on tropospheric NO$_2$ over China, South Korea and Italy
论文作者
论文摘要
对流层氮二氧化氮（NO $ _2 $）浓度受人为活性的强烈影响。使用基于空间的对流层NO $ _2 $的测量值，我们在这里研究了对流层NO $ _2 $对2019年中国，韩国和意大利的2019年小说冠状病毒（Covid-19）的反应。我们发现，由于COVID-19的控制量比中国E.，韩国和意大利N.显着减少了对流层NO $ _2 $列的40％以上。对流层的40％减少$ _2 $与密集的锁定事件以及人为氮氧化物（不$ _X $）排放的最高降低了20％。对流层NO $ _2 $的扰动伴随着减轻Covid-19的大流行，最终在所有三个国家的控制措施开始后的50-70天内消失了，为开始，最大程度和缓解密集型控制提供指示。这项工作表现出对大气环境的锁定措施的重大影响，强调了卫星观察对监测人为活动变化的重要性。
Tropospheric nitrogen dioxide (NO$_2$) concentrations are strongly affected by anthropogenic activities. Using space-based measurements of tropospheric NO$_2$, here we investigate the responses of tropospheric NO$_2$ to the 2019 novel coronavirus (COVID-19) over China, South Korea, and Italy. We find noticeable reductions of tropospheric NO$_2$ columns due to the COVID-19 controls by more than 40% over E. China, South Korea, and N. Italy. The 40% reductions of tropospheric NO$_2$ are coincident with intensive lockdown events as well as up to 20% reductions in anthropogenic nitrogen oxides (NO$_x$) emissions. The perturbations in tropospheric NO$_2$ diminished accompanied with the mitigation of COVID-19 pandemic, and finally disappeared within around 50-70 days after the starts of control measures over all three nations, providing indications for the start, maximum, and mitigation of intensive controls. This work exhibits significant influences of lockdown measures on atmospheric environment, highlighting the importance of satellite observations to monitor anthropogenic activity changes.
