Climatology of Tehran surface heat Island: a satellite-based spatial analysis
View abstract on PubMed
Summary
This summary is machine-generated.Tehran
Area Of Science
- Environmental Science
- Climatology
- Urban Planning
Background
- Tehran, a megacity with nearly 15 million inhabitants, faces significant environmental challenges.
- Inadequate urban strategies and rapid development contribute to these issues, including the Urban Heat Island (UHI) effect.
Purpose Of The Study
- This research investigates the Urban Heat Island (UHI) climatology in Tehran.
- It aims to analyze Land Surface Temperature (LST) variations, identify heat hotspots, and understand the influence of elevation and vegetation.
Main Methods
- Utilized 19 years (2003-2021) of daily MODIS-Aqua Land Surface Temperature (LST) data (1 km resolution).
- Analyzed urban-rural temperature differences, Surface Urban Heat Island (SUHI) structure, LST trends, and the roles of elevation and vegetation.
- Compared daytime and nighttime LST data for SUHI detection reliability.
Main Results
- Nighttime LST data proved more reliable for detecting Tehran's SUHI and reduced seasonal fluctuations.
- A mean annual urban-rural temperature difference of 6.17°C was observed, with variations across months and seasons.
- Tehran's surface temperature shows a significant increasing trend of 0.74°C per decade, with elevation playing a greater role than vegetation.
Conclusions
- Nighttime LST data is crucial for accurate SUHI studies in Tehran.
- Tehran exhibits a rising surface temperature trend and an increasing urban-rural temperature differential.
- Elevation significantly influences LST distribution more than vegetation cover in Tehran.