Atmospheric processes likely caused puzzling haze over China during COVID-19 shutdown

29-Jun-2020 5:05 PM EDT, by Wiley

Newswise — New research indicates that significant enhancement of secondary aerosol formed in the atmosphere via gas-to-particle conversion, together with long-lasting regional transport, may be the cause of severe haze over China despite a dramatic reduction in emissions during the COVID-19 shutdown. The findings are published in Geophysical Research Letters.

During the Chinese Lunar New Year holiday between January 24 and February 10, 2020, China was in an unprecedented state of shutdown because of COVID-19, with mobility, energy demands, and industrial pollution emissions remaining far below their normal levels. Nevertheless, a high and widespread haze pollution was observed over Eastern China.

To investigate this puzzling occurrence, Yunhua Chang, Professor, of the Nanjing University of Information Science & Technology, Ru-Jin Huang, Professor, of the Chinese Academy of Sciences, and their colleagues analyzed the chemical components of the air in and out of Shanghai before, during, and after the Chinese New Year holidays in 2019 and 2020, and they performed atmospheric transport modeling, a method to track particles and trace gases that are dispersed by atmospheric winds.

The team found that secondary aerosol formation that interacts with long-range transport likely caused the long-lasting haze during the COVID-19 pandemic.

The results highlight the need for joint management efforts and control strategies across large areas to effectively clear China's air.

"We hope our findings can inform future regulatory policies to mitigate China's haze-associated problems," said Dr. Chang.

"Additional studies are needed to pinpoint the role of atmospheric oxidation capacity--which is affected by emission reductions of air pollutants--in the formation of secondary aerosols," added Dr. Huang.

This paper is part of an ongoing special collection of research in AGU journals related to the current pandemic.

###

SEE ORIGINAL STUDY




Filters close

Showing results

110 of 2911
Newswise: Obesity a Major Risk for Severe COVID-19 Cases
Released: 13-Aug-2020 4:55 PM EDT
Obesity a Major Risk for Severe COVID-19 Cases
Hackensack Meridian Health

While the U.S. Centers for Disease Control and Prevention (CDC) advises that people of any age can contract COVID-19, obesity has emerged among the major risk factors for severe cases. With more than 40 percent of Americans classified as obese, experts caution that this is a growing concern.

Newswise: Ophthalmologists Anticipate a School Year Marked by Complaints of Eye Strain
Released: 13-Aug-2020 4:10 PM EDT
Ophthalmologists Anticipate a School Year Marked by Complaints of Eye Strain
American Academy of Ophthalmology (AAO)

The American Academy of Ophthalmology shares back-to-online school checklist to protect kids’ eyes from too much screen time.

Newswise: 240042_web.jpg
Released: 13-Aug-2020 3:05 PM EDT
A quick, cost-effective method to track the spread of COVID-19
Hokkaido University

A group of researchers have demonstrated that, from seven methods commonly used to test for viruses in untreated wastewater, an adsorption-extraction technique can most efficiently detect SARS-CoV-2. This gives us another tool to detect the presence and spread of the COVID-19 pandemic.

Released: 13-Aug-2020 2:40 PM EDT
Technion’s Nanofiber PPE Sticker Now In Mass Production
American Technion Society

The COVID-busting ‘Maya’ sticker developed by Technion researchers has gone into mass production. Comprised of a nanofiber sheet, the unique sticker can be easily adhered to a protective mask, significantly improving its effectiveness against the novel coronavirus.

13-Aug-2020 11:00 AM EDT
Massive, rapid vaccine production will require firms to share information
University of Michigan

As the world rushes to identify safe and effective vaccines and therapeutics to counter the COVID-19 epidemic, attention is turning to the next step: manufacturing these products at enormous scale.

Released: 13-Aug-2020 1:05 PM EDT
Additive Manufacturing for COVID-19
Materials Research Society (MRS)

A new Prospective article—Additive Manufacturing for COVID-19: Devices, Materials, Prospects and Challenges—published in MRS Communications, looks at these critical supply issues and provides an overview of 3D printing and how coupling the tools in additive manufacturing (AM) and advanced materials has provided a viable alternative for rapid production and distribution of PPEs and medical devices.

Newswise: Busting Up the Infection Cycle of Hepatitis B
Released: 13-Aug-2020 12:50 PM EDT
Busting Up the Infection Cycle of Hepatitis B
University of Delaware

Researchers at the University of Delaware have gained new understanding of the virus that causes hepatitis B and the “spiky ball” that encloses the virus’s genetic blueprint. They examined how the capsid—a protein shell that protects the blueprint and also drives the delivery of it to infect a host cell—assembles itself. Scientists believe that the capsid is an important target in developing drugs to treat hepatitis B, a life-threatening and incurable infection that afflicts more than 250 million people worldwide.

Newswise: 240097_web.jpg
Released: 13-Aug-2020 12:05 PM EDT
Stay-at-home orders significantly associated with reduced spread of COVID-19, study finds
Brown University

Across the globe, COVID-19 has infected more than 18 million people to date and has killed hundreds of thousands -- and the United States has been hit especially hard.

Released: 13-Aug-2020 11:45 AM EDT
COVID-19 Symptom Tracker Ensures Privacy During Isolation
Georgetown University Medical Center

An online COVID-19 symptom tracking tool developed by researchers at Georgetown University Medical Center ensures a person’s confidentiality while being able to actively monitor their symptoms. The tool is not proprietary and can be used by entities that are not able to develop their own tracking systems.

Newswise: Support for telehealth and mobile health monitoring rises since COVID, study says
Released: 13-Aug-2020 11:25 AM EDT
Support for telehealth and mobile health monitoring rises since COVID, study says
University of Alabama Huntsville

Support for telehealth and mobile health monitoring has risen among healthcare workers and consumers since the rise of the COVID-19 pandemic, according to a new study. Dr. Emil Jovanov, a pioneer in the wearable health monitoring field from The University of Alabama in Huntsville (UAH), participated and was a coauthor.


Showing results

110 of 2911

close
2.88933