Relationship between the land surface temperature and the vegetation proportion to identify heat islands: case study of Brasília (Brazil)

Cátia Rodrigues de Almeida; Ana Claudia Moreira Teodoro

doi:10.1117/12.2572802

20 September 2020 Relationship between the land surface temperature and the vegetation proportion to identify heat islands: case study of Brasília (Brazil)

Cátia Rodrigues de Almeida, Ana Claudia Moreira Teodoro

Author Affiliations +

Proceedings Volume 11534, Earth Resources and Environmental Remote Sensing/GIS Applications XI; 1153411 (2020) https://doi.org/10.1117/12.2572802
Event: SPIE Remote Sensing, 2020, Online Only

Conference Poster

Abstract

Anthropic changes resulting from urbanization contribute to the modification of surface materials, originating the suppression of vegetation, waterproofing of the soil and the variation of albedo, which can contribute to the formation of Heat Islands (HI). This phenomenon results from the higher absorption of electromagnetic energy by the buildings, when compared to vegetation, corroborating both the increase of surface temperature and the minimization of the relative humidity of the air. This effect is potentiated at night, when urbanized regions maintain higher average temperatures for a longer time, when compared to vegetation areas. Some impacts of this effect are: (i) thermal discomfort and influence on the local microclimate and; (ii) displacement of water bodies. This work aimed to analyze the relationship between the Land Surface Temperature (LST) and the Vegetation Proportion (Pv), derived from Normalized Difference Vegetation Index (NDVI), in the densely built area of Brasília (Brazil), in order to evaluate if its characteristics confirm the micro-scale climate change. Several images from Landsat 5 and 8 thermal sensors were processed between 1989 and 2019 and the results obtained point out that the LST is inversely proportional to Pv, i.e., the highest temperatures were observed in classified areas with scarce or no Pv, which corroborates with the hypothesis that anthropic altered regions can influence the local climate. Despite the phenomenon observed and the 50% increase in maximum temperature in 2019 when compared to the 1989 and the decrease in maximum Pv by 36% in the same years, it is mandatory additional studies to confirm these findings.

Conference Presentation

Citation Download Citation

Cátia Rodrigues de Almeida and Ana Claudia Moreira Teodoro "Relationship between the land surface temperature and the vegetation proportion to identify heat islands: case study of Brasília (Brazil)", Proc. SPIE 11534, Earth Resources and Environmental Remote Sensing/GIS Applications XI, 1153411 (20 September 2020); https://doi.org/10.1117/12.2572802

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available