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Citywide quantification of street-canyon contributions to near-road NO2 in Hong Kong using a coupled WRF-CMAQ-ADMS framework
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AI
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P
J
K
B
J
DOI：10.1016/j.envpol.2026.128871.png)
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Abstract
En 中文
• Street canyons raised NO2 by ≥ 5 μg m−3 on 5.97% of roads. • Canyon-induced NO2 hotspots clustered in four dense urban districts. • Hotspots were linked to higher H/W ratios and street symmetry. • Mean hotspot increments were higher in winter than summer (13.34 vs 8.82 μg m−3). • Winter canyon impacts exposed 184,389 residents to ≥1% extra health risk.
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