The results of measurement campaigns are analyzed to investigate the thermal structure in an urban canyon, and to validate a simplified model simulating the air and surface temperatures from surface energy budgets. Starting from measurements at roof-top level, the model provides time series of air and surface temperatures, as well as surface fluxes. Two campaigns were carried out in summer 2007 and in winter 2008/09 in a street of the city of Trento (Italy). Temperature sensors were placed at various levels near the walls flanking the canyon and on a traffic light in the street center. Furthermore, the atmosphere above the mean roof-top level was monitored by a weather station on top of a tower located nearby. Air temperatures near the walls, being strongly influenced by direct solar radiation, display considerable contrasts between the opposite sides of the canyon. On the other hand, when solar radiation is weak or absent, the temperature field remains rather homogeneous.Moreover, air temperature inside the canyon is generally higher than above roof level, with larger differences during summertime. Air temperatures from the above street measurements are well simulated by the model in both seasons. Furthermore, the modeled surface temperatures are tested against a dataset of wall surface temperatures fromtheAdvanced Tools for Rational Energy Use Towards Sustainability–Photocatalytic Innovative AU1 Coverings Applications for Depollution (ATREUS–PICADA) experiment, and a very good agreement is found. Results suggest that themodel is a reliable and convenient tool for simplified assessment of climatic conditions occurring in urban canyons under various weather situations.

Characterization of the thermal structure inside an urban canyon: field measurements and validation of a simple model / Giovannini, Lorenzo; Zardi, Dino; M., de Franceschi. - In: JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY. - ISSN 1558-8424. - STAMPA. - 52:1(2013), pp. 64-81. [10.1175/JAMC-D-12-06.1]

Characterization of the thermal structure inside an urban canyon: field measurements and validation of a simple model

Giovannini, Lorenzo;Zardi, Dino;
2013

Abstract

The results of measurement campaigns are analyzed to investigate the thermal structure in an urban canyon, and to validate a simplified model simulating the air and surface temperatures from surface energy budgets. Starting from measurements at roof-top level, the model provides time series of air and surface temperatures, as well as surface fluxes. Two campaigns were carried out in summer 2007 and in winter 2008/09 in a street of the city of Trento (Italy). Temperature sensors were placed at various levels near the walls flanking the canyon and on a traffic light in the street center. Furthermore, the atmosphere above the mean roof-top level was monitored by a weather station on top of a tower located nearby. Air temperatures near the walls, being strongly influenced by direct solar radiation, display considerable contrasts between the opposite sides of the canyon. On the other hand, when solar radiation is weak or absent, the temperature field remains rather homogeneous.Moreover, air temperature inside the canyon is generally higher than above roof level, with larger differences during summertime. Air temperatures from the above street measurements are well simulated by the model in both seasons. Furthermore, the modeled surface temperatures are tested against a dataset of wall surface temperatures fromtheAdvanced Tools for Rational Energy Use Towards Sustainability–Photocatalytic Innovative AU1 Coverings Applications for Depollution (ATREUS–PICADA) experiment, and a very good agreement is found. Results suggest that themodel is a reliable and convenient tool for simplified assessment of climatic conditions occurring in urban canyons under various weather situations.
1
Giovannini, Lorenzo; Zardi, Dino; M., de Franceschi
Characterization of the thermal structure inside an urban canyon: field measurements and validation of a simple model / Giovannini, Lorenzo; Zardi, Dino; M., de Franceschi. - In: JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY. - ISSN 1558-8424. - STAMPA. - 52:1(2013), pp. 64-81. [10.1175/JAMC-D-12-06.1]
File in questo prodotto:
File Dimensione Formato  
Giovannini_et_al_2013_JAMC.pdf

Solo gestori archivio

Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 2.62 MB
Formato Adobe PDF
2.62 MB Adobe PDF   Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/93296
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 24
  • ???jsp.display-item.citation.isi??? 24
social impact