Synoptic analysis of the most durable pollution and clean waves during 2009-2019 in Tehran City (capital of Iran).

Nat Hazards (Dordr) · 2022 · PMC8377706 · PMID 34429567

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a decreasing trendno p-value reported

an increasing trendno p-value reported

Intensity and frequency of the polluted days during statistical period showed a decreasing trend that coincided with an increasing trend of precipitation.

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