A spatially-explicit method to assess the dry deposition of air pollution by urban forests in the city of Florence, Italy

《A spatially-explicit method to assess the dry deposition of air pollution by urban forests in the city of Florence, Italy》

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来源: URBAN FORESTRY & URBAN GREENING,Vol.27,P.221-234

语言: 英文

关键字: Airborne laser scanning; Airborne particulate matter; Ecosystem services; Leaf area index; Ozone; Urban green infrastructure; LEAF-AREA INDEX; AIRBORNE LASER SCANNER; ECOSYSTEM SERVICES PERSPECTIVE; PERIURBAN MEDITERRANEAN FOREST; DISCRETE-RETURN LIDAR; P

作者单位: [Bottalico, Francesca; Travaglini, Davide; Chirici, Gherardo; Giannetti, Francesca; Nocentini, Susanna; Salbitano, Fabio] Univ Florence, Dipartimento Gest Sistemi Agr Alimentari & Forest, Via San Bonaventura 13, I-50145 Florence, Italy. [Garfi, Vittorio; Marchetti, Marco] Univ Molise, Dipartimento Biosci & Terr, I-86090 Pesche, Isernia, Italy. [De Marco, Alessandra] Agenzia Nazl Nuove Tecnol Energia & Sviluppo Econ, Ctr Ric Casaccia, Via Anguillarese 301, I-00123 Rome, Italy. [Fares, Silvano] Consiglio Ric Agr & Anal Econ Agr, Ctr Ric Foreste & Legno, Viale Santa Margherita 80, I-52100 Arezzo, Italy. [Paoletti, Elena] CNR, Via Madonna del Piano 10, I-50019 Florence, Italy. [Sanesi, Giovanni] Univ Bari, Dipartimento Sci Agroambientali & Terr, Via Amendola 165-A, I-70126 Bari, Italy. Travaglini, D (reprint author), Univ Florence, Dipartimento Gest Sistemi Agr Alimentari & Forest, Via San Bonaventura 13, I-50145 Florence, Italy. E-Mail: francesca.bottalico@unifi.it; davide.travaglini@unifi.it; gherardo.chirici@unifi.it; vittorio.garfi@unimol.it; francesca.giannetti@unifi.it; alessandra.demarco@enea.it; silvano.fares@crea.gov.it; marchettimarco@unimol.it; susanna.nocentini@unifi.it; elena.paoletti@cnr.it; fabio.salbitano@unifi.it; giovanni.sanesi@uniba.it

摘要: Urban forests (UF) provide a range of important ecosystem services (ES) for human well-being. Relevant ES delivered by UF include urban temperature regulation, runoff mitigation, noise reduction, recreation, and air purification. In this study the potential of air pollution removal by UF in the city of Florence (Italy) was investigated. Two main air pollutants were considered - particulate matter (PM10) and tropospheric ozone (O-3) with the aim of providing a methodological framework for mapping air pollutant removal by UF and assessing the percent removal of air pollutant. The distribution of UF was mapped by high spatial resolution remote sensing data and classified into seven forest categories. The Leaf Area Index (LAI) was estimated spatially using a regression model between in-field LAI survey and Airborne Laser Scanning data and it was found to be in good linear agreement with estimates from ground-based measurements (R-2 = 0.88 and RMSE% = 11%). We applied pollution deposition equations by using pollution concentrations measured at urban monitoring stations and then estimated the pollutant removal potential of the UF: annual O-3 and PM10 removal accounted for 77.9 t and 171.3 t, respectively. O-3 and PM10 removal rates by evergreen broadleaves (16.1 and 27.3 g/m(2)), conifers (10.9 and 28.5 g/m(2)), and mixed evergreen species (15.8 and 31.7 g/m(2)) were higher than by deciduous broadleaf stands (4.1 and 10 g/m(2)). However, deciduous forests exhibited the largest total removal due to the high percentage of tree cover within the city. The present study confirms that UF play an important role in air purification in Mediterranean cities as they can remove monthly up to 5% of O-3 and 13% of PM10.