“Ozone’s response to NOx is well understood to be highly non-linear. The stringent lockdown imposed by the Chinese government to slow the spread of COVID-19 early this year significantly eased the strain on hospitals there. In China, which has aimed to improve its notoriously poor air quality in recent years, the health burden is steep. “The scientific community was interested in documenting what changes actually occurred.”. “These opposing changes show how complex air quality can be,” said Miyazaki.

“Early in the quarantine period, there was some discussion that the Earth was healing itself, but some of those claims, like the dolphins in Venice, have turned out to be false,” Diamond says. There's been a sharp drop in air pollution over China since the acceleration of the COVID-19 coronavirus outbreak, and satellites can see it from space.

Fine particulate matter, which has a bigger impact on human health and the climate, hardly changed over China during the shutdown. Duke Environmental Leadership Master of Environmental Management, International Master of Environmental Policy, University Program in Environmental Policy (UPEP), University Program in Integrated Toxicology and Environmental Health, Window for Slowing COVID’s Spread was Smaller than Projected, Online Tool Calculates Risk of Classroom Transmission of Airborne COVID-19. Admissions due to non-COVID respiratory illnesses decreased by nearly 5,000, a new study by an international team of scientists shows. It is rare to see anything that striking,” Diamond says. “On the other hand, our analysis shows no dramatic changes in the total amount of aerosol particles in the atmosphere, or in cloud properties. “When you’re crafting these clean air strategies, you’re probably not going to be able to attack just one sector; you’ll have to address several sectors at once,” Diamond says. The findings demonstrate that “the COVID-19 lockdown effect on air quality and its human health impacts depends a lot on where and when it occurs,” said Kevin Bowman, engineering and science directorate principal at JPL, who co-authored the study. “These results give us a window into a what a cleaner world could look like—and the paths needed to achieve it,” said Kazuyuki Miyazaki, a scientist in the Tropospheric Composition Group at NASA’s Jet Propulsion Laboratory (JPL) at the California Institute of Technology, who led the study. Durham, NC 27708, Intranet | Student Services Policies | Jobs | Privacy | Accessibility | Feedback.

Futurity is your source of research news from leading universities. The authors also considered the atmospheric effects of the Chinese New Year, which is celebrated in either late January or early February and generates both higher particulates from fireworks and lower traffic emissions from people being on holiday. DOI: https://doi.org/10.1029/2020GL089252. “Our study suggests that since we found little change in particulate pollution due to COVID-19, we are unlikely to see any change in the clouds unless pollution changes over a longer time period due to a prolonged economic downturn,” Wood says. “The difference we see is more than twice as large a drop as anything we saw in the record from 2005 to 2019, including from the 2008 Great Recession. Grainger Hall At the same time, however, surface ozone increased by 16 parts per billion over northern China, causing about 2,100 ozone-related ailments and 60 additional hospitalizations there. DURHAM, N.C. – The stringent lockdown imposed by the Chinese government to slow the spread of COVID-19 early this year significantly eased the strain on hospitals there. While other studies have already looked at air quality during the pandemic, this is the first to take a more rigorous view, using all 15 years of satellite data. Original Study The satellite-derived estimates were checked against surface measurements recorded at air-quality monitoring stations during the same time. As China seeks to control the spread of COVID-19, fewer cars are driving, fewer factories are running and — in some places — skies are clearer. That study showed that to detect the effect on clouds researchers need many years of data. China’s COVID Lockdown Significantly Cut Air Pollution-Related Hospitalizations. While the change in nitrogen dioxide was dramatic, other quantities showed no significant change.

DOI: 10.1029/2020GL088913. This likely resulted in about 60,000 fewer related illnesses – primarily asthma attacks – and 5,000 fewer hospital admissions. The study links the drop in hospitalizations to improved air quality, particularly a nationwide drop in fine particulate matter (PM2.5) pollution, that occurred in the wake of rapid reductions in fossil fuel emissions after the lockdown severely limited transportation and most industrial or commercial activity.

Passenger transportation virtually disappeared during the lockdown, but economic data show that heavy industry and energy production stayed fairly constant, Diamond says. These instruments use different wavelengths to monitor quantities like nitrogen oxides, airborne particulates, and clouds. Scientists from the Japan Agency for Marine-Earth Science and Technology, the University of Science and Technology of China, and the Royal Netherlands Meteorological Institute co-authored the new study. Add your information below to receive daily updates. “During the February 2020 shutdowns in China there was a large and rapid decline in nitrogen dioxide—an air pollutant largely associated with transportation—that is unprecedented in the satellite record,” says Michael Diamond, a doctoral student in atmospheric sciences at the University of Washington and lead author of the study, published in Geophysical Research Letters. NOTE: Drew Shindell can be reached for additional comment at drew.shindell@duke.edu. In very polluted places like northern China, NOx decreases cause ozone increases,” Shindell explained.

“What we’ve learned can provide valuable insights for future interventions.”. Using satellite measurements, they tracked changes in ozone and PM2.5 air pollution in all Chinese provinces in January and February, starting just before the first lockdown was imposed on hard-hit Hubei province on Jan. 23. China’s COVID Lockdown Significantly Cut Air Pollution-Related Hospitalizations The stringent lockdown imposed by the Chinese government to slow the spread of COVID-19 early this year significantly eased the strain on hospitals there.

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