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Investigating the Impact of NDVI on Urban Island Heat Effect Across four Islands in Trang Province, Thailand
Organization(s):Samsenwittayalai School
Country:Thailand
Student(s):Peeranat Saringkarnphasit, Phongpanot Dolamphonphisuth, Ashira Eiamarune, Puntut Tanapaisarnwattana, Phattarapol Lakhan, Dechathorn Khongcharoenchai, Warot Phanpoowong, Wanpee Julpamorn, Charanchai Akkeesuwan, Peranat Pornjaturin, Papangkorn Methawararak, Kristin Malayaphon
Grade Level:Secondary School (grades 9-12, ages 14-18)
GLOBE Educator(s):Kornkamon Kumnerdkarn
Contributors:Assoc.Prof.Dr.Krisanadej Jaorensutasinee, Assoc.Prof.Dr.Mullica Jaroensutasinee, Mr. Babey Dimla Tonny, Mr. Sutthipan Hiranpurk and Center of Excellence for Ecoinformatics, School of Science, Walailak University, Thailand
Report Type(s):International Virtual Science Symposium Report
Protocols:Surface Temperature, Land Cover Classification
Presentation Video:
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Language(s):English
Date Submitted:02/28/2025
This research investigates the interplay between the Normalized Difference Vegetation Index (NDVI) and Land Surface Temperature (LST) across various surface types of 4 Islands in Trang Province, Thailand. To assess the urban heat island (UHI) effect, ground-based temperature measurements alongside satellite-derived NDVI data used in this study elucidate how variations in vegetation cover influence thermal conditions in urban and peri-urban environments. Field measurements were conducted across multiple surface types, including asphalt, concrete, dry ground, water, sand, rocks, and vegetated areas, using infrared thermometers following the GLOBE Protocol. Simultaneously, NDVI values were extracted for the study area using high-resolution satellite data from MODIS NASA APPEARS and Copernicus Sentinel platforms to analyze vegetation density relative to surface temperatures comprehensively. Preliminary results indicate a pronounced thermal disparity between urbanized and green spaces, with maximum recorded LSTs reaching 48.2°C in densely built environments compared to 30.7°C in tree-covered areas. The findings suggest a significant inverse correlation between NDVI and LST, where higher vegetation indices correlate with reduced surface temperatures, highlighting the cooling effects of green infrastructure. This study underscores the critical role of vegetation in mitigating UHI effects, providing essential insights for urban planners and policymakers in Trang Province. The findings are expected to contribute to effective heat mitigation strategies and sustainable urban development in the context of climate change.