使用卫星遥感在德黑兰和郊区表面城市热岛的气候比较
Motahhareh Zargari1, Abbas Mofidi2, Alireza Entezari3
1Hakim Sabzevari University, Sabzevar, Iran. motahharehzargari@yahoo.com.
Scientific reports
|January 5, 2024
概括
德黑兰的表面城市热岛 (SUHI) 效应在夜间最明显,延伸到郊区. 这项研究强调了MODIS LST数据.
科学领域:
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
- 城市气候学 城市气候学
背景情况:
- 城市热岛 (UHI) 现象对城市环境产生重大影响.
- 了解表面城市热岛 (SUHI) 动态对于城市规划和气候适应至关重要.
- 德黑兰的复杂地形和快速城市化需要详细的SUHI分析.
研究的目的:
- 使用多卫星数据,比较德黑兰及其郊区的地表城市热岛 (SUHI) 条件.
- 分析陆地表面温度 (LST) 和SUHI的空间和时间变化.
- 评估不同卫星LST产品对SUHI监测的适用性.
主要方法:
- 利用了来自MODIS Aqua,Sentinel-3和Landsat 8的高分辨率陆地表面温度 (LST) 数据.
- 分析了昼夜卫星数据,以评估SUHI强度和空间分布.
- 使用空间统计 (莫兰的I,盖蒂斯指数) 和NDVI分析来理解LST/UHI模式.
主要成果:
- 在夜间,在德黑兰市中心和西部郊区观察到最高的LST/UHI值.
- 在德黑兰及其郊区之间发现了5°C的季节性和年度UHI差异.
- 在大德黑兰地区,MODIS LST产品在夜间SUHI评估中表现出更高的适用性.
- 发现城市热岛 (UHI) 效应超出了城市边界,特别是在南部和西部郊区.
结论:
- 夜间条件加剧了德黑兰及其周边郊区的SUHI影响.
- 城市热岛 (UHI) 的强度受高度和土地覆盖面 (NDVI) 等因素的影响.
- 有效的SUHI监测需要适当的卫星数据选择,MODIS显示夜间分析的希望.
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