Journal ArticleDOI
Estimating urban morphometry at the neighborhood scale for improvement in modeling long-term average air pollution concentrations
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In this article, an approach to estimate urban morphometry and, in particular, the street canyon aspect ratio (h/w) of buildings for improvement of land use regression models of traffic related pollution without the requirement for detailed site-specific measurements was described.About:
This article is published in Atmospheric Environment.The article was published on 2008-11-01. It has received 45 citations till now. The article focuses on the topics: Urban climate & Air quality index.read more
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Built Environment Influences on Healthy Transportation Choices: Bicycling versus Driving
TL;DR: Findings indicate that the built environment has a significant influence on healthy travel decisions, and spatial context is important, and future research should explicitly consider relevant spatial zones when investigating the relationship between physical activity and urban form.
A numerical study of the effects of ambient wind direction on flow and dispersion in urban street canyons using the RNG k-ε turbulence model
TL;DR: In this article, a three-dimensional computational fluid dynamics model with the renormalization group k-e turbulence scheme was developed to investigate the effects of ambient wind direction on flow and dispersion around a group of buildings.
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Mapping maximum urban air temperature on hot summer days
Hung Chak Ho,Anders Knudby,Paul Sirovyak,Yongming Xu,Matus Hodul,Sarah B. Henderson,Sarah B. Henderson +6 more
TL;DR: In this paper, a spatial regression approach was proposed to map the peak daytime air temperature relative to a reference station on typical hot summer days using Vancouver, Canada as a case study, and three regression models, ordinary least squares regression, support vector machine and random forest, were all calibrated using Landsat TM/ETM+ data and field observations from two sources: Environment Canada and the Weather Underground.
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How Far Out of the Way Will We Travel? Built Environment Influences on Route Selection for Bicycle and Car Travel
TL;DR: Investigating differences in total distance, road type used, and built environment features for shortest-path routes versus actual routes for utilitarian bicycle trips and car trips in Metro Vancouver, Canada illustrates factors that might be included in travel models to more accurately model nonmotorized transportation and provides guidance for how dense bike facilities need to be when infrastructure to support cycling is designed.
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Predicting traffic-related air pollution in Los Angeles using a distance decay regression selection strategy.
TL;DR: The first LUR models of nitric oxide, nitrogen dioxide and nitrogen oxides for the complex megalopolis of Los Angeles, California are created, representing the first attempt to model traffic-related air pollutants at a fine scale within such a complex and large urban region.
References
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Classification and Regression Trees.
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Air pollution and health.
TL;DR: The evidence for adverse effects on health of selected air pollutants is discussed, and it is unclear whether a threshold concentration exists for particulate matter and ozone below which no effect on health is likely.
Book
Interactive Spatial Data Analysis
TL;DR: A: Introduction 1. Spatial data analysis 2. Computers and Spatial Data Analysis B: The Analysis of Data Associated with Points 3. Methods Relating to Point Patterns 4. Methodsrelating to Marked Point Patterns 5. MethodsRelating to a Continuously Varying Attribute Sampled at Points.
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A Physically-Based Transformation of Thematic Mapper Data---The TM Tasseled Cap
Eric P. Crist,Richard C. Cicone +1 more
TL;DR: In an extension of previous simulation studies, a transformation of actual TM data in the six reflective bands is described which achieves three objectives: a fundamental view of TM data structures is presented, the vast majority of data variability is concentrated in a few features, and the defined features can be directly associated with physical scene characteristics.
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Aerodynamic Properties of Urban Areas Derived from Analysis of Surface Form
C. S. B. Grimmond,Timothy R. Oke +1 more
TL;DR: In this paper, several methods to determine the aerodynamic characteristics of a site through analysis of its surface form (morphometry) are considered in relation to cities, including zero-plane displacement length (zd), roughness length(z0), depth of the roughness sublayer, and aerodynamic conductance.