Impact of the COVID-19 pandemic and control measures on air quality and aerosol light absorption in Southwestern China.

Sci Total Environ · 2020 · PMC7399664 · PMID 32822916

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an increasing trendno p-value reported

O 3 production was at 66.8 ppb m 2 /w, 62.3 ppb m 2 /w, 82.3 ppb m 2 /w, 103.9 ppb m 2 /w, and 90.0 ppb m 2 /w in those stages, showing an increasing trend during the depletion of NO x .

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a decreasing trendno p-value reported

The average AAE (370–880 nm) was 1.9 ± 0.3, showing a decreasing trend from 2.0 to 1.6 from before Level 1 to Level 3 RMPHE.

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