在复杂的地形上,MODIS和ERA5-Land表面变暖趋势的时空空间变化的一致性
1Department of Civil Engineering, Atilim University, Ankara, Turkey. meric.yilmaz@atilim.edu.tr.
Environmental science and pollution research international
|August 2, 2023
概括
本研究与土耳其地面观测相比,验证了来自卫星的陆地表面温度 (LST) 和空气温度数据. 卫星产品与地面数据保持良好的一致性,有可能取代数据稀缺的地面站.
科学领域:
- 地球和环境科学 地球和环境科学
- 遥感 遥感 遥感 遥感
- 气候学 气候学 气候学
背景情况:
- 陆地表面温度 (LST) 和空气温度是关键的气候变量.
- 卫星产品,如MODIS (MxD11,MxD21) 和ERA5-Land (SKT,2m空气温度) 广泛用于LST估计.
- 根据地面观测验证这些产品是必不可少的,特别是在土耳其等地形复杂的地区.
研究的目的:
- 通过土耳其2000-2021年的地面观测来验证MODIS MxD11,MxD21和ERA5-陆地温度产品.
- 评估卫星导出的温度相对于地面真相的一致性和趋势,考虑到地形复杂性.
主要方法:
- 对MODIS MxD11,MxD21,ERA5-Land皮肤温度 (SKT) 和2m空气温度产品的验证.
- 利用土耳其各地266个站点的2米地面空气温度数据.
- 分析了温度趋势和变化,将卫星数据与22年时间内的地面观测数据进行比较.
主要成果:
- 较冷的地区比较温暖的地区呈现出更高的时间温度变化.
- 莫迪斯MxD21和MxD11产品比ERA5-Land产品温度更高,分别为4.4°C和2.9°C.
- 与ERA5-Land (0.94°C/十年) 相比,MODIS产品的趋势较小 (0.7°C/十年),2月份的趋势最高.
- 卫星产品和地面数据之间的一致性在具有复杂地形和灌的地区较低.
结论:
- MODIS和ERA5-Land的温度趋势与地面观测高度一致.
- 这些卫星产品可以作为地面观测的可靠替代品,特别是在数据稀缺的地区.
- 了解温度变化和趋势对于气候监测和研究至关重要.
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