Analyzing Temperature Variations and Vegetation Dynamics in Yasouj-Iran Using Satellite Imagery (2000-2020)
Subject Areas : Journal of Radar and Optical Remote Sensing and GISSajad Jalil 1 , Alireza Nouri 2
1 - Education Organization of Sadough County, Yazd, Iran
2 - Geography and Urban Planning, Islamic Azad University, Yazd, Iran
Keywords: Satellite images, Vegetation, Urban Temperature, Google Earth Engine, YASOUJ City,
Abstract :
Objective: This study aims to investigate the impact of urbanization on temperature changes and vegetation dynamics in Yasouj, Iran, over a 20-year period (2000-2020). The focus is on analyzing temperature variations (day and night) and vegetation cover, utilizing satellite imagery to identify trends and patterns related to urban development.
Methods: The research employed satellite data obtained from NASA's GIVANNI platform and Google Earth Engine (GEE) to analyze daily and night temperature patterns, as well as vegetation cover changes. The data were segmented into four five-year periods (2000-2005, 2005-2010, 2010-2015, and 2015-2020) to detect spatiotemporal variations in temperature and vegetation. GEE was utilized to create high-resolution maps, and spatial data analysis was conducted to identify the relationship between urban expansion, temperature changes, and vegetation dynamics.
Results: The study reveals a noticeable increase in surface temperatures, particularly during nighttime, correlating with urban sprawl. Vegetation cover exhibited both expansion and contraction over time, with significant reduction observed in urbanized areas. The study period from 2015 to 2020 showed a marked expansion of vegetation, while the 2005-2010 period saw significant decreases in vegetation in certain regions.
Conclusion: The findings emphasize the complex interaction between urbanization, temperature rise, and vegetation changes in Yasouj. The results underscore the importance of sustainable urban development strategies that prioritize green infrastructure to mitigate climate change impacts and enhance urban resilience. The study contributes valuable insights for urban planners and policymakers striving for climate-resilient cities.
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