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@ARTICLE{Tao:1037651,
author = {Tao, Chenliang and Peng, Yanbo and Zhang, Qingzhu and
Zhang, Yuqiang and Gong, Bing and Wang, Qiao and Wang,
Wenxing},
title = {{D}iagnosing ozone–{NO} x –{VOC}–aerosol sensitivity
and uncovering causes of urban–nonurban discrepancies in
{S}handong, {C}hina, using transformer-based estimations},
journal = {Atmospheric chemistry and physics},
volume = {24},
number = {7},
issn = {1680-7316},
address = {Katlenburg-Lindau},
publisher = {EGU},
reportid = {FZJ-2025-00816},
pages = {4177 - 4192},
year = {2024},
abstract = {Narrowing surface ozone disparities between urban and
nonurban areas escalate health risks in densely populated
urban zones. A comprehensive understanding of the impact of
ozone photochemistry on this transition remains constrained
by current knowledge of aerosol effects and the availability
of surface monitoring. Here we reconstructed spatiotemporal
gapless air quality concentrations using a novel transformer
deep learning (DL) framework capable of perceiving
spatiotemporal dynamics to analyze ozone urban–nonurban
differences. Subsequently, the photochemical effect on these
discrepancies was analyzed by elucidating shifts in ozone
regimes inferred from an interpretable machine learning
method. The evaluations of the model exhibited an average
out-of-sample cross-validation coefficient of determination
of 0.96, 0.92, and 0.95 for ozone, nitrogen dioxide, and
fine particulate matter (PM2.5), respectively. The ozone
sensitivity in nonurban areas, dominated by a
nitrogen-oxide-limited (NOx-limited) regime, was observed to
shift towards increased sensitivity to volatile organic
compounds (VOCs) when extended to urban areas. A third
“aerosol-inhibited” regime was identified in the
Jiaodong Peninsula, where the uptake of hydroperoxyl
radicals onto aerosols suppressed ozone production under low
NOx levels during summertime. The reduction of PM2.5 could
increase the sensitivity of ozone to VOCs, necessitating
more stringent VOC emission abatement for urban ozone
mitigation. In 2020, urban ozone levels in Shandong
surpassed those in nonurban areas, primarily due to a more
pronounced decrease in the latter resulting from stronger
aerosol suppression effects and less reduction in PM2.5.
This case study demonstrates the critical need for advanced
spatially resolved models and interpretable analysis in
tackling ozone pollution challenges.},
cin = {JSC},
ddc = {550},
cid = {I:(DE-Juel1)JSC-20090406},
pnm = {5111 - Domain-Specific Simulation $\&$ Data Life Cycle Labs
(SDLs) and Research Groups (POF4-511)},
pid = {G:(DE-HGF)POF4-5111},
typ = {PUB:(DE-HGF)16},
UT = {WOS:001198245900001},
doi = {10.5194/acp-24-4177-2024},
url = {https://juser.fz-juelich.de/record/1037651},
}