| Autor: |
Marcon, Alessandro1,2 alessandro.marcon@univr.it, de Hoogh, Kees2,3,4 c.dehoogh@unibas.ch, Gulliver, John2 j.gulliver@imperial.ac.uk, Beelen, Rob5,6 R.M.J.Beelen@uu.nl, Hansell, Anna L.2,7 a.hansell@imperial.ac.uk |
| Předmět: |
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| Zdroj: |
Atmospheric Environment. Dec2015, Vol. 122, p696-704. 9p. |
| Abstrakt: |
When measurements or other exposure models are unavailable, air pollution concentrations could be estimated by transferring land-use regression (LUR) models from other areas. No studies have looked at transferability of LUR models from regions to cities. We investigated model transferability issues. We developed a LUR model for 2010 using annual average nitrogen dioxide (NO 2 ) concentrations retrieved from 47 regulatory stations of the Veneto region, Northern Italy. We applied this model to 40 independent sites in Verona, a city inside the region, where NO 2 had been monitored in the European Study of Cohorts for Air Pollution Effects (ESCAPE) during 2010. We also used this model to estimate average NO 2 concentrations at the regulatory network in 2008, 2009 and 2011. Of 33 predictor variables offered, five were retained in the LUR model (R 2 = 0.75). The number of buildings in 5000 m buffers, industry surface area in 1000 m buffers and altitude, mainly representing large-scale air pollution dispersion patterns, explained most of the spatial variability in NO 2 concentrations (R 2 = 0.68), while two local traffic proxy indicators explained little of the variability (R 2 = 0.07). The performance of this model transferred to urban sites was poor overall (R 2 = 0.18), but it improved when only predicting inner-city background concentrations (R 2 = 0.52). Recalibration of LUR coefficients improved model performance when predicting NO 2 concentrations at the regulatory sites in 2008, 2009 and 2011 (R 2 between 0.67 and 0.80). Models developed for a region using NO 2 regulatory data are unable to capture small-scale variability in NO 2 concentrations in urban traffic areas. Our study documents limitations in transferring a regional model to a city, even if it is nested within that region. [ABSTRACT FROM AUTHOR] |
| Databáze: |
GreenFILE |
| Externí odkaz: |
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Full Text from ScienceDirect