The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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Articles | Volume XLIII-B3-2021
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLIII-B3-2021, 15–22, 2021
https://doi.org/10.5194/isprs-archives-XLIII-B3-2021-15-2021
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLIII-B3-2021, 15–22, 2021
https://doi.org/10.5194/isprs-archives-XLIII-B3-2021-15-2021

  28 Jun 2021

28 Jun 2021

REMOTE SENSING AND NIGHT TIME URBAN HEAT ISLAND

B. Arellano and J. Roca B. Arellano and J. Roca
  • Technical University of Catalonia, Spain

Keywords: Nighttime Urban Heat Island, LST, Emissivity, Fractional Cover, Landsat 8, summer and winter NDVI, Metropolitan Area of Barcelona

Abstract. The urban climate literature has highlighted the remarkable prominence of nighttime UHI phenomenon. During nighttime the UHI effects become more evident due to the greater thermal inertia of the materials used in urban fabric. It is during the night when the heat accumulated in urban materials, especially in contexts of heat waves, can generate significant health risks. The low cooling capacity of urban construction materials negatively affects the comfort and the health of urban dwellers. However, and despite the great importance of night stress due to heat, the study of night UHIs is still underdeveloped. In this context, this paper aims to determine nighttime LST contrasting Landsat's very limited nighttime images with daytime ones. The example developed refers to heat wave situations during the summer 2015. The case study is the Metropolitan Area of Barcelona (35 municipalities, 636 km2, 3.3 million inhabitants).