Spatio-temporal Features of Urban Heat Island and its Relationship with Land Use/Cover in Mountainous City: A Case Study in Chongqing

Abstract

The urban heat island (UHI) becomes more and more serious with the acceleration of urbanization. Many researchers have shown interest in studying the UHI by using remote sensing data. But these studies rarely examine the mountainous cities. The studies on UHI in mountainous cities often used empirical parameters to estimate the land surface temperature (LST), and lacked satellite-ground synchronous experiment to test the accuracy. This paper revised the parameters in mono-window algorithm used to retrieve the LST according to the characteristics of mountainous cities. This study examined the spatial and temporal patterns of the UHI intensity in Chongqing, a typical mountainous city, and its relationship with land cover from 2007 to 2011 based on the Landsat TM data and the improved method. The accuracy of the LST derivation increased by about 1°C compared to the traditional method. The high LST areas increased and extended from the downtown to suburban area each year, but the rate of change decreased. The UHI is dramatically impacted by the rivers. There is a good relationship between the urban sprawl and the UHI. The LST was reduced by about 1°C within a 300m distance from large urban fringe green spaces. The urban landscape parks had a strong effect relieving the UHI at a 100m distance. The LST was reduced by about 0.5°C. The study greatly improves the accuracy of LST derivation, and provides a reliable parameters for the UHI researched in mountainous city.

A Study of Soundscape Restoration in Office-Type Pocket Parks

“…The perception evaluation of the soundscapes of the pocket parks is shown in openness, brightness, tranquillity, and visual landscape preference are commonly used in visual perception evaluation [20,35,48]. Studies have been conducted on the perceptua characteristics of soundscapes in urban parks by selecting parameters such as comfort variety, naturalness, and coordination [49]. Therefore, on existing studies, this study se lected visual landscape comfort (VCD), diversity (VDD), and naturalness (VND) along with acoustic environmental comfort (SCD), diversity (SDD), and naturalness (SND).…”

“…This scale assesses how soundscapes facilitate or impede recovery from mental and emotional stressors. Researchers have utilised the PRSS to study soundscape restoration [49][50][51][52]. The soundscape restorative scale for office-type pocket parks was determined on the basis of existing research and comprised 19 subquestions across dimensions such as fascination, being-away-to, being-away-from, compatibility, and coherency.…”

Impact of land-use land-cover datasets and urban parameterization on weather simulation over the Jakarta Metropolitan Area

“…There has been a significant change in the global LU [3] and this needs attention considering that researchers agree that there is a relationship between LULC change and climate change [4]. LULC changes affect the atmospheric environment such as temperature, humidity, wind, and precipitation and also extreme rainfall events [5][6][7].…”