Graphical summary. Credit: Science of The Total Environment (2022). DOI: 10.1016/j.scitotenv.2022.159341
A analysis group led by Prof. Si Fuqi from the Hefei Institutes of bodily Science (HFIPS) of the Chinese Academy of Sciences (CAS) developed a brand new methodology to retrieve tropospheric ozone profiles. The corresponding outcomes had been revealed in Science of the Total Environment.
Ozone is concerned in numerous chemical conversion processes of atmospheric air pollution and is a typical secondary pollutant, particularly in city areas. Accurate monitoring of floor ozone focus and vertical distribution is necessary to boost the prevention and management of ozone air pollution.
Multi-axis differential optical absorption spectroscopy (MAX-DOAS) is a passive optical monitoring approach that allows the retrieval of multi-component hint gases. However, the robust absorption of stratospheric ozone makes the retrieval of tropospheric ozone profiles with the MAX-DOAS approach a really difficult job.
In this research, Associate Prof. Luo Yuhan and Dr. Qian Yuanyuan at HFIPS innovatively employed MAX-DOAS measurements to retrieve tropospheric ozone profiles. They utilized the strategies in a SCIATRAN radiative switch mannequin to find out the affect of stratospheric absorption on the retrieval of those profiles.
Thanks to the optimum estimation algorithm, the researchers precisely obtained the absorption of troposphere ozone and dependable troposphere ozone profiles.
The inversion methodology was correct, in keeping with the group. They obtained tropospheric ozone concentrations in the course of the PRIDE-GBA Campaign with it.
They retrieved ozone differential slant column densities utilizing the “time-interpolated zenith spectrum” because the reference spectrum. By subtracting the simulated stratospheric ozone differential slant column densities, they calculated the exact tropospheric ozone differential slant column densities, which was simulated from the SCIATRAN mannequin.
“We in contrast the noticed ozone profile and floor ozone concentrations with Lidar and in-situ measurements,” mentioned Luo, “the outcomes had been extremely correlated.”
This research expands the applying eventualities of the MAX-DOAS instrument and offers a brand new answer for finding out the mechanism of tropospheric ozone formation.
Combined with the retrieved NO2 and HCHO profiles utilizing the MAX-DOAS measurements, the mechanisms of regional tropospheric ozone air pollution may be analyzed extra precisely. Meanwhile, the price of commentary and instrument upkeep might be vastly lowered.
Control components of ozone formation change with altitudes, research finds
More data:
Yuanyuan Qian et al, Retrieval of tropospheric ozone profiles utilizing ground-based MAX-DOAS, Science of The Total Environment (2022). DOI: 10.1016/j.scitotenv.2022.159341
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Chinese Academy of Sciences
Citation:
Using a passive optical monitoring approach to retrieve tropospheric ozone profiles (2022, October 26)
retrieved 26 October 2022
from https://phys.org/information/2022-10-passive-optical-technique-tropospheric-ozone.html
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