We've updated our Privacy Policy to make it clearer how we use your personal data.

We use cookies to provide you with a better experience. You can read our Cookie Policy here.

Advertisement
Underestimation of Ozone Pollution Production in Cities Highlighted by Self-Developed Instrument
News

Underestimation of Ozone Pollution Production in Cities Highlighted by Self-Developed Instrument

Underestimation of Ozone Pollution Production in Cities Highlighted by Self-Developed Instrument
News

Underestimation of Ozone Pollution Production in Cities Highlighted by Self-Developed Instrument

Credit: Mathgun/ Pixabay
Read time:
 

Want a FREE PDF version of This News Story?

Complete the form below and we will email you a PDF version of "Underestimation of Ozone Pollution Production in Cities Highlighted by Self-Developed Instrument"

First Name*
Last Name*
Email Address*
Country*
Company Type*
Job Function*
Would you like to receive further email communication from Technology Networks?

Technology Networks Ltd. needs the contact information you provide to us to contact you about our products and services. You may unsubscribe from these communications at any time. For information on how to unsubscribe, as well as our privacy practices and commitment to protecting your privacy, check out our Privacy Policy

The local ozone generation was greatly underestimated with current mechanism under high NOx conditions, according to a recent research conducted by a research team led by Prof. XIE Pinhua from Hefei Institutes of Physical Science (HFIPS), Chinese Academy of Sciences (CAS).


This research, based on the observed concentration of HOx free radicals, pointed a way for future ozone pollution control.


Their findings were published in Science of the Total Environment.


Radicals are essential driving force of secondary pollution formation. Scientists have observed high level of OH radical concentrations in urban areas, and established the non-traditional regeneration mechanism. Due the distinctions on atmospheric oxidations in different regions along with defects in current mechanisms of box model, serious underestimations of ozone formation were not accidental. It is necessary to carry out researches on atmospheric oxidations in different environments.


Following a one month first in-situ HOx radicals measurement in the wintertime of Shanghai with a self-developed HOx instrument, Prof. HU Renzhi and PhD student ZHANG Guoxian, member of the team, conducted a closure analysis on megacity atmospheric chemical processes with a box model. The level of HOx radicals they observed was higher than previous wintertime observations (OH: 2.7×106 cm-3, HO2: 0.8×108 cm-3).


Considering the overview of radical concentrations, reactivities and budget channels, they concluded that the complex carbonyls-related oxidation under elevated photochemistry was a possible factor for the discrepancy of the radical sources.


Reference: Zhang G, Hu R, Xie P, et al. Observation and simulation of HOx radicals in an urban area in Shanghai, China. Sci. Total Environ. 2022;810:152275. doi: 10.1016/j.scitotenv.2021.152275

  

This article has been republished from the following materials. Note: material may have been edited for length and content. For further information, please contact the cited source.


Advertisement