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Titolo:
Modification of an operational dispersion model for urban applications
Autore:
de Haan, P; Rotach, MW; Werfeli, M;
Indirizzi:
Swiss Fed Inst Technol, Inst Climate Res, Zurich, Switzerland Swiss Fed Inst Technol Zurich Switzerland mate Res, Zurich, Switzerland
Titolo Testata:
JOURNAL OF APPLIED METEOROLOGY
fascicolo: 5, volume: 40, anno: 2001,
pagine: 864 - 879
SICI:
0894-8763(2001)40:5<864:MOAODM>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
TURBULENT TRANSFER RELATIONSHIPS; POLLUTANT CONCENTRATIONS; ENERGY-BALANCE; SURFACE; ENVIRONMENT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: de Haan, P INFRAS Ltd, Muehlemattstr 45, CH-3007 Bern, Switzerland INFRAS Ltd Muehlemattstr 45 Bern Switzerland CH-3007 itzerland
Citazione:
P. de Haan et al., "Modification of an operational dispersion model for urban applications", J APPL MET, 40(5), 2001, pp. 864-879

Abstract

An operational multisource, multireceptor Gaussian dispersion model, the Danish regulatory model Operationelle Meteorologiske Luftkvalitetsmodeller (OML) has been modified for applications in urban environments. A so-called roughness sublayer has been introduced into the model to represent the turbulence characteristics of the lowest part of the surface layer over rough surfaces like cities. The meteorological preprocessor was enhanced to take into account an urban energy budget. The performance of the resulting OML-Urban has been validated for nitrogen oxides and sulfur dioxide for Zurich for 1990. For that year, a detailed emission inventory as well as continuous hourly measurements at four stations are available. The 24 air pollution monitoring stations used for validation have been divided into different groups, depending on local influences from nearby roads. In comparison with results from the standard OML using an urban roughness length, the urban modification (roughness sublayer and changes in the meteorological preprocessor)results in a 25%-35% increase of the annual mean surface concentration. OML-Urban shows a good reproduction of the probability density function of observed hourly concentrations, and the simulated yearly averaged concentrations show a good correspondence to observations.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 19:12:29