2020
DOI: 10.31223/osf.io/hvuzy
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Enhanced secondary pollution offset reduction of primary emissions during COVID-19 lockdown in China

Abstract:

To control the spread of the 2019 novel coronavirus (COVID-19), China imposed nationwide restrictions on the movement of its population (lockdown) after the Chinese New Year of 2020, leading to large reductions in economic activities and associated emissions. Despite such large decreases in primary pollution, there were nonetheless several periods of heavy haze pollution in East China, raising questions about the well-established relationship between human activities and air quality. Here, using comprehensi… Show more

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Cited by 117 publications
(176 citation statements)
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“…These in consequence affect emissions of air pollutants, especially from the transport and industry sectors, which are significant sources of NO x (NO x ¼ NO 2 + NO) in cities. Several studies presented a large decrease of NO 2 concentration during the lockdown period in China from both in situ and satellite observations (Huang et al, 2020;Wang et al, 2020). Tropospheric NO 2 column concentrations observed by the TROPOMI (TROPOspheric Monitoring Instrument) on the Sentinel-5P satellite decrease about 35% over China and some areas up to 60% during the COVID-19 regulation period compared to the same period of 2019 (Bauwens et al, 2020;Liu et al, 2020;Zhang et al, 2020).…”
Section: Introductionmentioning
confidence: 99%
“…These in consequence affect emissions of air pollutants, especially from the transport and industry sectors, which are significant sources of NO x (NO x ¼ NO 2 + NO) in cities. Several studies presented a large decrease of NO 2 concentration during the lockdown period in China from both in situ and satellite observations (Huang et al, 2020;Wang et al, 2020). Tropospheric NO 2 column concentrations observed by the TROPOMI (TROPOspheric Monitoring Instrument) on the Sentinel-5P satellite decrease about 35% over China and some areas up to 60% during the COVID-19 regulation period compared to the same period of 2019 (Bauwens et al, 2020;Liu et al, 2020;Zhang et al, 2020).…”
Section: Introductionmentioning
confidence: 99%
“…The rapid transmission of the COVID-19 pandemic has become a major health threat globally. In late December 2019, an epidemic of pneumonia linked with novel coronavirus disease-2019 (COVID-19) (Huang et al 2020a, b;Wu et al 2020) that has its epicenter in Wuhan, China, has spread over 215 countries worldwide (WHO 2020a). The COVID-19 epidemic was declared a public health emergency at a global level by the World Health Organization (WHO) on Jan 30, 2020 (WHO 2020b).…”
Section: Introductionmentioning
confidence: 99%
“…The COVID-19 epidemic was declared a public health emergency at a global level by the World Health Organization (WHO) on Jan 30, 2020 (WHO 2020b). The COVID-19 cases burst at an alarming rate with significant mortality (Wang et al 2020a, b) and have impacted human life and the world economy. The transmission of COVID-19 has mostly occurred between people via respiratory droplets and contact routes (Burke et al 2020;Chan et al 2020;Li et al 2020;Liu et al 2020a, b;WHO 2020c).…”
Section: Introductionmentioning
confidence: 99%
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“…On 29th December 2019, at Wuhan city, the capital of Hubei Province in China a new infectious disease was first identified (Huang et al 2020;Zhou et al 2020a, b) and then it spread all over the world. More than 11,635,939 confirmed cases of COVID-19, including 539,026 deaths, reported to the World Health Organization (WHO).…”
Section: Introductionmentioning
confidence: 99%