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- GC31F-0755: Ground Urban Heat Island: Strengthening the Connection Between Spaceborne Thermal Observations and Urban Heat Risk Management
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Board 0755‚ Hall EFG (Poster Hall)NOLA CC
Author(s):Generic 'disconnected' Message
Christopher Uejio, Florida State University (First Author)
Leiqiu Hu, University of Alabama in Huntsville (Presenting Author)
As cities grow under a changing climate, people in urban areas face more heat, putting them at risk. To protect them, it's crucial to understand where and when heat is most intense in cities. Direct satellite measurements help show surface urban heat islands (SUHI) that are widely used for mapping hot spots to identify higher heat risks and vulnerable communities. However, this method can be biased. This study suggests a new way to measure heat in cities using satellites that only consider the heat coming from the ground in urban areas, called ground urban heat islands (GUHI). By using data from the ECOSTRESS aboard the International Space Station and statistical approaches, we looked at how hot urban ground was throughout the day in New York City. We found that overall, GUHI was consistently hotter than SUHI throughout the day. However, heat patterns depicted by GUHI were influenced by urban surface properties in complex ways and were often different from SUHI at the local scale. This research shows that using satellite data to measure heat can give us better insights than air temperature for spatial applications, and this study offers more reliable ways to support heat risk management in cities worldwide.
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