TITLE:
Seasonal Dynamics of Land Surface Temperature in Urban Louisiana: A Landsat 9-Based Analysis of New Orleans and Baton Rouge
AUTHORS:
Yaw A. Twumasi, Olipa Simon, Edmund C. Merem, Zhu H. Ning, Harriet B. Yeboah, Priscilla M. Loh, Jeff D. Osei
KEYWORDS:
Urban Heat Island, Subtropical Climate, Vegetation, Thermal, Land Cover, Remote Sensing
JOURNAL NAME:
Advances in Remote Sensing,
Vol.15 No.2,
April
28,
2026
ABSTRACT: Urbanization and climate change have led to rising land surface temperatures (LST) in Louisiana’s cities, particularly New Orleans and Baton Rouge, where impervious surfaces and reduced vegetation intensify the urban heat island effect. This study examines seasonal and spatial LST dynamics in these two urban areas to provide insights for targeted climate adaptation. Landsat 9 Operational Land Imager (OLI) thermal infrared data were analyzed, with LST derived from digital values converted to top-of-atmosphere spectral radiance, brightness temperature, and adjusted using land surface emissivity calculated from NDVI. The study fills research gap by comparing both cities using consistent methods to reveal shared and city-specific temperature pattern. Results revealed distinct seasonal variations in land surface temperature (LST), with Baton Rouge exhibiting a mean of 32.53˚C in the dry season and 19.26˚C in the wet season. In contrast, New Orleans recorded 30.90˚C and 18.85˚C, respectively. Spatial study indicated increased temperature fluctuation in New Orleans, with a greater proportion of land surpassing 35˚C during the dry season. These variations are attributed to fluctuations in surface moisture levels, vegetation density, and urban land use. The research illustrates the effectiveness of thermal infrared satellite data in evaluating urban thermal dynamics. It offers significant insights for climate monitoring, environmental planning, and the formulation of localized heat mitigation methods in humid Subtropical areas. Louisiana’s urban planning bodies should adopt green infrastructure initiatives, such as expanding tree coverage, installing green roofs, and utilizing permeable materials to help curb rising land surface temperatures and lessen urban heat island impacts. In addition, using localized heat vulnerability maps can support more effective resource distribution and emergency planning with a focus on protecting neighborhoods most vulnerable to seasonal heat.