Effective Range and Driving Factors of the Urban Ventilation Corridor Effect on Urban Thermal Comfort at Unified Scale with Multisource Data

Weiling Liu,Jingyin Wang,Guo Zhang,Yonghua Jiang

doi:10.3390/rs13091783

Abstract

Urban ventilation corridors serve as channels of fresh air flow between the city and suburbs, helping to improve the wind and thermal environments and thermal comfort. However, owing to the limited number of weather stations, it is impossible to quantitatively reveal the effective effect range of urban ventilation corridors on urban thermal comfort at the scale of 100 × 100 m, which is optimal for urban ventilation corridors. In this study, we integrated building data, the European Centre for Medium-Range weather forecast data (ECMWF), MOD13Q1, and other multisource data to analyse the effect of urban ventilation corridors on urban thermal comfort at a unified scale of 100 × 100 m. The results showed that ECMWF and Landsat8 data could be used as substitute factors to improve the universal thermal climate index (UTCI) urban spatial resolution. The effective range of urban ventilation corridor effects on the urban surface temperature and urban comfort was ≤1000 m, with building density and vegetation coverage as the main factors limiting this range. Therefore, attention should be paid to the effective range of urban ventilation corridors, the surrounding building density, vegetation coverage, and the rational use of urban ventilation corridors to reduce the energy consumption of air conditioning in summer.

Highlights

Cities cover approximately 1% of the surface of the Earth and accommodate 54% of the global population [1]
We used the daily temperatures and wind directions measured by the 23 weather stations in the Pearl River Delta from 1987 to 2017 to respectively create a violin chart and radar chart using Python, as shown in Figure 5 [57]
From 1987 to 2017 in the Pearl River Delta, the average annual temperature recorded by the 23 weather stations was above 0 ◦ C

Summary

Introduction

Cities cover approximately 1% of the surface of the Earth and accommodate 54% of the global population [1]. Limited space and rapid population growth have forced most cities to adopt high-rise, compact, and high-density building layout patterns [4]. These factors increase the roughness of urban surfaces, reduce urban ventilation, and cause a series of urban problems, such as the ‘accumulation of pollutants and, the urban heat island effect (UHIE) [5,6,7,8]. It is important to explore ways to improve the living comfort of urban residents in relatively compact urban spaces

Methods

Results

Conclusion