COVID-19爆发后中国上空对流层二氧化氮的突然下降
Abrupt declines in tropospheric nitrogen dioxide over China after the outbreak of COVID-19
摘要：
中国为减少2019冠状病毒病传播而采取的政策干预措施对环境和经济产生了影响。对流层二氧化氮表明经济活动，因为二氧化氮主要来自化石燃料消耗。卫星测量显示，对流层二氧化氮垂直柱密度从2020年农历新年前的20天平均值下降了48%。这比近年来增加了20%。我们将这一减少与政府的两项行动联系起来：每个省公布第一份报告和一个省的封锁日期。这两项行动的减排幅度几乎相同。我们的分析通过减少经济活动，提供了对意外环境和经济后果的见解。
英文摘要：
China's policy interventions to reduce the spread of the coronavirus disease 2019 have environmental and economic impacts. Tropospheric nitrogen dioxide indicates economic activities, as nitrogen dioxide is primarily emitted from fossil fuel consumption. Satellite measurements show a 48% drop in tropospheric nitrogen dioxide vertical column densities from the 20 days averaged before the 2020 Lunar New Year to the 20 days averaged after. This is 20% larger than that from recent years. We relate to this reduction to two of the government's actions: the announcement of the first report in each province and the date of a province's lockdown. Both actions are associated with nearly the same magnitude of reductions. Our analysis offers insights into the unintended environmental and economic consequences through reduced economic activities.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
