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Comparing the modeled deposition of PM2.5 with the Eddy Covariance flux and SEM analysis of an urban forest in Naples

Pace, Rocco ORCID iD icon; Guidolotti, Gabriele; Baldacchini, Chiara; Calfapietra, Carlo

Abstract (englisch):

Trees can remove particles from the air through the physical deposition on the leaf surface. This process depends on pollution concentration and weather conditions as wind speed and precipitation, in addition to leaf characteristics. Wind speed increases at the same time the deposition velocity and the resuspension of PM deposited, instead, the rain washes off into the soil the particles accumulated on the leaf. The PM flux removed by trees has been modeled in the i-Tree Eco model considering the effect of wind speed on deposition velocity and resuspension and fixing a threshold of leaf washing (0.2 mm x LAI). However, the results of the model have not been validated with measured data and especially the washing threshold and resuspension classes based on wind speed still remain uncertain. In this study, we compared the modeled deposition of PM2.5 with the Eddy Covariance flux measured in an urban forest in Naples. The results of the model have been further validated by comparing the expected PM2.5 accumulations on the leaf (net flux integral) with the average PM load experimentally determined in the same site where the model input data (i.e., PM concentration, wind speed and rain) have been collected. ... mehr

Volltext §
DOI: 10.5445/IR/1000100115
Veröffentlicht am 02.12.2019
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Vortrag
Publikationsjahr 2019
Sprache Englisch
Identifikator KITopen-ID: 1000100115
HGF-Programm 12.02.04 (POF III, LK 01) Urban-Rural Interactions
Veranstaltung 12th Congresso Nazionale SISEF La Scienza Utile per le Foreste: ricerca e trasferimento (2019), Palermo, Italien, 12.11.2019 – 15.11.2019
Schlagwörter model validation; particulate matter; resuspension; leaf washing
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