THE INTENSITY OF SURFACE HEAT ISLANDS AND THE VEGETATION INDEX USING NORMALIZED DIFFERENCE IN RONDONOPOLIS-MT

Gomes, Washington Paulo; Costa Trindade Amorim, Margarete Cristiane de [UNESP]

THE INTENSITY OF SURFACE HEAT ISLANDS AND THE VEGETATION INDEX USING NORMALIZED DIFFERENCE IN RONDONOPOLIS-MT

Data

2024-01-01

Autores

Gomes, Washington Paulo

Costa Trindade Amorim, Margarete Cristiane de

Editor

Univ Estadual Paulista Julio Mesquita Filho

Tipo

Artigo

Resumo

The utilization of thermal infrared sensor via satellite imagery represents a significant technique for intra-urban temperatures, aiding in understanding the formation of surface heat islands within spatial context, considering Earth's utilization and occupation. Remote sensors for surface temperature detection offer advantages, providing frequent data on the Earth's surface and facilitating the examination of urban thermal environment across various spatial and temporal scales. This study aimed to analyze the intensity of surface heat islands during four episodes spanning the dry and rainy seasons in Rondonopolis-MT. To achieve this, images from the Landsat 8 satellite, utilizing the thermal infrared channel/TIRS 1 (band 10), were employed to identify heat islands, while the red channels (band 4) and near-infrared (band 5) were utilised to assess vegetation levels via the Normalized Difference Vegetation Index (NDVI). The findings revealed that surfacel heat islands exhibited strong magnitudes, reaching intensities of up to 14 degrees C. During the dry season, intensities were heightened due to fires, leading to increased surface absorption capacity, attributed to a combination of factors including greater soil exposure, heightened radiation absorption by carbonized vegetation, and reduced evapotranspiration.