Sunday, July 3, 2022
SCIENMAG: Latest Science and Health News
No Result
View All Result
  • Login
  • HOME PAGE
  • BIOLOGY
  • CHEMISTRY AND PHYSICS
  • MEDICINE
    • Cancer
    • Infectious Emerging Diseases
  • SPACE
  • TECHNOLOGY
  • CONTACT US
  • HOME PAGE
  • BIOLOGY
  • CHEMISTRY AND PHYSICS
  • MEDICINE
    • Cancer
    • Infectious Emerging Diseases
  • SPACE
  • TECHNOLOGY
  • CONTACT US
No Result
View All Result
Scienmag - Latest science news from science magazine
No Result
View All Result
Home SCIENCE NEWS Atmospheric Science

Unfavorable weather conditions were the main cause of the fog-haze events over the Beijing-Tianjin-Hebei region during the COVID-19 lockdown

March 10, 2021
in Atmospheric Science
0
Share on FacebookShare on Twitter

IMAGE

Credit: GAO Yi

At the end of December 2019, Coronavirus Disease 2019 (COVID-19) quickly spread throughout Hubei Province and other parts of China. During the 2020 Spring Festival, public activities were cancelled, people tried their best to stay at home, and human and industrial activities were reduced to a basic or minimum level. However, during this period, severe fog-haze events occurred over the North China Plain. What was the leading factor that caused these severe smog incidents? And what were the individual impacts of meteorological conditions and emission reductions?

To evaluate the impacts of meteorological conditions and emission reduction measures on the near-surface PM2.5 (fine particulate matter) during the COVID-19 lockdown, three numerical experiments with different meteorological fields and emission sources were carried out with a coupled meteorology and aerosol/chemistry model (WRF-Chem) by Professor Zhang Meigen and his team from the Institute of Atmospheric Physics, Chinese Academy of Sciences, and the findings have recently been published in Atmospheric and Oceanic Science Letters.

The results of the study found that, compared with the same period in 2019, the PM2.5 concentration in the Beijing-Tianjin-Hebei region increased by 50-70 μg m?3 from 7 to 14 February 2020, during which time the daily average PM2.5 concentration in Beijing reached 175 μg m?3. Results from sensitivity tests showed that the main cause was that the increase in PM2.5 caused by meteorological conditions was greater than the decrease in PM2.5 caused by emission reductions.

“Higher temperatures and relative humidity usually hasten the formation of secondary aerosols by accelerating chemical reactions”, explains Prof. Zhang. “Meanwhile, the lower wind speed in the Beijing-Tianjin-Hebei region inhibits the diffusion of air pollutants and the lower planetary boundary layer height enhances atmospheric stability. These unfavorable meteorological conditions led to these haze events in the Beijing-Tianjin-Hebei region.”

Therefore, it is necessary to consider meteorological conditions when assessing the effectiveness of emission control policies on changes in air pollutants. Doing so is likely to be very helpful for the formulation of future air pollution reduction policies.

###

Media Contact
Ms. LIN Zheng
[email protected]

Original Source

http://aosl.iapjournals.ac.cn/EN/news/news128.shtml

Related Journal Article

http://dx.doi.org/10.1016/j.aosl.2020.100014

Tags: Atmospheric ChemistryAtmospheric ScienceClimate ChangePollution/Remediation
Share25Tweet16Share4ShareSendShare
  • How to MRI your dragon

    How to MRI your dragon: Illinois researchers develop first bearded dragon brain atlas

    74 shares
    Share 30 Tweet 19
  • Immune molecules from a llama could provide protection against a vast array of SARS-like viruses including COVID-19, researchers say

    74 shares
    Share 30 Tweet 19
  • Researchers perform non-line-of-sight ghost imaging with human vision

    73 shares
    Share 29 Tweet 18
  • Unique blend of comics and humor is key to success of public awareness posters in Singapore, finds Singapore-US researchers

    72 shares
    Share 29 Tweet 18
  • Human urine-derived stem cells have robust regenerative potential

    72 shares
    Share 29 Tweet 18
  • Researchers develop word-score model capable of estimating hidden hearing loss

    71 shares
    Share 28 Tweet 18
ADVERTISEMENT

About us

We bring you the latest science news from best research centers and universities around the world. Check our website.

Latest NEWS

nTIDE May 2022 COVID Update: Uncertainty about inflation tempers good news for people with disabilities

COVID-19 fattens up our body’s cells to fuel its viral takeover

Famous Sterkfontein Caves deposit 1 million years older than previously thought

Subscribe to Blog via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 190 other subscribers

© 2022 Scienmag- Science Magazine: Latest Science News.

No Result
View All Result
  • HOME PAGE
  • BIOLOGY
  • CHEMISTRY AND PHYSICS
  • MEDICINE
    • Cancer
    • Infectious Emerging Diseases
  • SPACE
  • TECHNOLOGY
  • CONTACT US

© 2022 Scienmag- Science Magazine: Latest Science News.

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In
Posting....