Abstract
Land surface temperature (LST) is an essential parameter in the climate system whose dynamics indicate climate change. This study aimed to assess the impact of multitemporal land use and land cover (LULC) change on LST due to urbanization in Hefei City, Anhui Province, China. The research methodology consisted of four main components: Landsat data collection and preparation; multitemporal LULC classification; time-series LST dataset reconstruction; and impact of multitemporal LULC change on LST. The results revealed that urban and built-up land continuously increased from 2.05% in 2001 to 13.25% in 2020. Regarding the impact of LULC change on LST, the spatial analysis demonstrated that the LST difference between urban and non-urban areas had been 1.52 K, 3.38 K, 2.88 K and 3.57 K in 2001, 2006, 2014 and 2020, respectively. Meanwhile, according to decomposition analysis, regarding the influence of LULC change on LST, the urban and built-up land had an intra-annual amplitude of 20.42 K higher than other types. Thus, it can be reconfirmed that land use and land cover changes due to urbanization in Hefei City impact the land surface temperature.
Highlights
Land surface temperature (LST) is an essential parameter in the climate system, and its dynamics can be used to indicate climate change [1,2,3,4,5,6,7,8]
LST data from the thermal infrared (TIR) bands of a satellite are crucial to understanding the impacts of urbanization on account of land use and land cover (LULC) change [9]
LST is a quantity concerning the surface of the Earth, which is highly variable in space and time
Summary
Land surface temperature (LST) is an essential parameter in the climate system, and its dynamics can be used to indicate climate change [1,2,3,4,5,6,7,8]. LST is regularly measured from a thermal infrared (TIR) band of satellite sensors, such as Landsat (moderately spatial resolution) and MODIS (high temporal resolution). LST data from the TIR bands of a satellite are crucial to understanding the impacts of urbanization on account of land use and land cover (LULC) change [9]. The estimated satellite LST, as primary input data, has been applied to determine the near-ground air temperature in various studies, such as urban heat island mapping and its intensity analysis due to urbanization [16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34]
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