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- W3038762977 abstract "Abstract Changes in vegetation traits influence the particulate pollution mitigating effects of trees in street canyons; however, it remains unclear whether tree canopy density (i.e. the proportion of the street floor covered by the vertical projection of the tree canopy) promotes or reduces this effect. A 12-day field experiment was conducted in four representative street canyons to examine the mitigating effects of street trees on particulate matter (PM) for PM1, PM2.5, PM4, PM7, PM10, and total suspended particles (TSP) among four canopy density treatments, including (1) open spaces and areas with (2) sparse (≤35%), (3) medium (35–70%) and (4) dense (≥70%) canopy densities. The results showed that canopy density is the dominant vegetation trait that affects PM dispersion, with peak decreases occurring at a canopy density of ~30%. The particulate matter attenuation coefficient (PMAC) indicates the PM reduction capability of trees. The PMAC of each particle size class correlated negatively with canopy density and TSP (" @default.
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- W3038762977 date "2020-11-01" @default.
- W3038762977 modified "2023-10-16" @default.
- W3038762977 title "Canopy density effects on particulate matter attenuation coefficients in street canyons during summer in the Wuhan metropolitan area" @default.
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- W3038762977 doi "https://doi.org/10.1016/j.atmosenv.2020.117739" @default.
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