Abstract
Abstract. Urban Heat Island (UHI) refers to the development of higher urban temperatures of an urban area compared to the temperatures of surrounding suburban and rural areas. Highly reflective urban materials to solar radiation present a significantly lower surface temperature and contribute to reducing the sensible heat released in the atmosphere and mitigating the urban heat island. Many studies of the UHI effect have been based on Land Surface Temperature (LST) measurements from remote sensors. The remotely sensed UHI has been termed the surface urban heat island (SUHI) effect. This study examines Tabriz city land use/land cover (LULC) and LST changes using Landsat satellite images between 2000 and 2017. Maximum likelihood classification and single channel methods were used for LULC classification and LST retrieval respectively. Results show that impervious surface has increased 13.79% and bare soil area has decreased 16.2%. The results also revealed bare soil class LST after a constant trend become increasing. It also revealed the impervious surface LST has a decreasing trend between 2000 and 2011 and has a little change. Using materials that have low absorption and high reflectance decrease the effect of heat island considerably.
Highlights
Urban Heat Island (UHI) effect is one of the ecological consequences of urbanization (Li et al, 2011)
UHI refers to the development of higher urban temperatures of an urban area compared to the temperatures of surrounding suburban and rural areas (Santamouris, 2013)
Reflective materials to solar radiation when used in the urban environment present a significantly lower surface temperature and contribute to reducing the sensible heat released in the atmosphere and mitigating the urban heat island (Doulos et al, 2004)
Summary
Urban Heat Island (UHI) effect is one of the ecological consequences of urbanization (Li et al, 2011). Increased urban temperature is the result of the positive thermal balance of cities caused by the additional heat released and stored in the urban structure, and the lack of low temperature environmental sinks (Santamouris, 2001). Reflective materials to solar radiation when used in the urban environment present a significantly lower surface temperature and contribute to reducing the sensible heat released in the atmosphere and mitigating the urban heat island (Doulos et al, 2004). Because of the sparse distribution of observation stations, a spatially continuous analysis is often difficult. To solve these problems, many studies of the UHI effect have been based on land surface temperature (LST) measurements from remote sensors. The remotely sensed UHI has been termed the surface urban heat island (SUHI) effect (Streutker, 2002; Voogt & Oke, 2003)
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