A web-based screening tool has been developed to assist urban planners and air quality management officials in assessing the potential of urban heat island mitigation strategies to affect the urban climate, ozone air quality, and energy consumption within their cities. The user of the screening tool can select from any of over 200 US cities for which to conduct the analysis. The mitigation stra...

This paper describes urban wind ventilation mapping, using the concept of “building frontal area index”, and uses the Kowloon peninsula of Hong Kong as an example of a dense, sub-tropical urban environment where ventilation is critical for human health. The frontal area index is calculated for uniform 100 m grid cells, based on three dimensional buildings in each cell, for eight different wind ...

Artificial impervious surfaces are one of the most significant factors contributing to urban heat islands (UHIs). Adapting UHIs is a challenge in achieving thermal comfort. We conducted quantitative and subjective evaluation closely paved novel water-retaining pavement (WR) conventional dense-asphalt (AS). investigated states humans based on human energy balance known as “human load” an indicat...

The development of urbanization and the transformation green lands into impermeable land increase temperature create urban heat islands (UHIs). Our observations with remote sensing instruments Landsat platforms show considerable changes in use types Beijing city shrinking lands, expansion built environments, a slight during recent four decades. Using registered data from two meteorological stat...

A web-based screening tool has been developed to assist urban planners and air quality management officials in assessing the potential of urban heat island mitigation strategies to affect the urban climate, ozone air quality, and energy consumption within their cities. The user of the screening tool can select from any of over 200 US cities for which to conduct the analysis. The mitigation stra...

One of the most dramatic visuals of the 21st century is the sprawling skyline of a city. Glass-paned buildings as you look up, endless pavement as you look down. Cars honk. Tailpipes leak out pollutants. Lightbulbs buzz as a metropolis works into the night. What you do not necessarily see or hear... but might feel... is the heat. Because of human activities, there is an increase in air temperat...

From the ecological effect of urban green space system, this paper illustrates the necessity and importance of inter-disciplinary evaluation of the urban green space system from the ecological perspective and analyzes the mechanism of action of urban green space in relieving the heat island effect. The quantitative evaluation approach for the thermal environmental impact of urban green space sy...

Given rapid global urban development, increases to impervious surfaces, population growth, building construction, and energy consumption result in the heat island (UHI) phenomenon. However, spatial extent of UHIs is not clearly mapped many UHI studies based on a remote sensing approach. Therefore, we developed method extract during period from 2000 2021 Nanjing, China, explored impact two- thre...

It has long been known that the urban surface energy balance is different to that of a rural surface, and that heating of the urban surface after sunset gives rise to the Urban Heat Island (UHI). Less well known is how flow and turbulence structure above the urban surface are changed during different phases of the urban boundary layer (UBL). This paper presents new observations above both an ur...