Login | Register

Characterizing the Effect of Increasing Albedo on Urban Meteorology and Air Quality in Cold Climates, a case study for Montreal

Title:

Characterizing the Effect of Increasing Albedo on Urban Meteorology and Air Quality in Cold Climates, a case study for Montreal

Gholizadeh Touchaei, Ali (2015) Characterizing the Effect of Increasing Albedo on Urban Meteorology and Air Quality in Cold Climates, a case study for Montreal. PhD thesis, Concordia University.

[img]
Preview
Text (application/pdf)
Touchaei_PhD_S2015.pdf - Accepted Version
Available under License Spectrum Terms of Access.
11MB

Abstract

The higher temperature of urban areas compared to their surrounding rural areas is called urban heat island (UHI). UHI during summer may harm inhabitants and aggravate cooling energy demand. Increasing urban albedo is proposed to counter the undesirable impacts of UHI. To analyze the effect of albedo enhancement on urban climate, land-atmosphere interactions and various physical processes in the atmosphere and on the land should be modeled. Weather Research and Forecasting (WRF) model, urban canopy model (UCM), building energy model (BEM), and chemical transport model (CHEM) are coupled, to accurately investigate the effect of an increase in the urban albedo. To select appropriate models sensitivity of near surface air temperature and near surface wind velocity to the choice of parameterization is evaluated. Montreal and Toronto, as the two most populated Canadian cities, are selected for evaluation of UCMs and an increase in the urban albedo.
Seasonal performance of the increase in albedo of roofs, walls, and road by 0.45, 0.4, and 0.25, respectively, results in an average decrease of 0.25 °C during summer and a negligible effect during winter (<0.1 °C). The daily building energy savings of HVAC systems in summertime is about 18 Wh/100m2, while, the winter heating penalty is about 2 Wh/100m2. Considering the effect of aerosols and other pollutants, in summertime, the simulated maximum air temperature decreased by about 1 °C, near surface 8-hour average ozone concentration decreased by 0.1 ppbv, and 24-hour average PM2.5 concentration decreased by 2 μg/m3. Simulations show that increasing the urban albedo results in a reduction in summertime air temperature, leading to a lower cooling energy use and an improved outdoor air quality.

Divisions:Concordia University > Gina Cody School of Engineering and Computer Science > Building, Civil and Environmental Engineering
Item Type:Thesis (PhD)
Authors:Gholizadeh Touchaei, Ali
Institution:Concordia University
Degree Name:Ph. D.
Program:Building Engineering
Date:30 March 2015
Thesis Supervisor(s):Akbari, Hashem
ID Code:979900
Deposited By: ALI GHOLIZADEH TOUCHAEI
Deposited On:16 Jul 2015 12:36
Last Modified:18 Jan 2018 17:50
All items in Spectrum are protected by copyright, with all rights reserved. The use of items is governed by Spectrum's terms of access.

Repository Staff Only: item control page

Downloads per month over past year

Back to top Back to top