从MODIS过渡到VIIRS 全球水库产品
Deep Shah1, Shuai Zhang1, Sudipta Sarkar2,3
1Zachry Department of Civil and Environmental Engineering, Texas A&M University, College Station, TX, USA.
Scientific data
|February 15, 2024
概括
一个新的全球水库 (GWR) 产品来自美国宇航局.
科学领域:
- 地球观测 地球观测
- 水文学的水文学
- 遥感 遥感 遥感 遥感
背景情况:
- 水库对于水的可用性和安全性至关重要.
- 现有的数据集,如中等分辨率成像光谱辐射仪 (MODIS) GWR产品,正在接近其运行寿命的终点.
研究的目的:
- 开发一种新的全球水库 (GWR) 产品,使用美国宇航局的可见红外成像辐射仪套件 (VIIRS).
- 为了确保从长期运行的MODIS GWR产品到新的VIIRS GWR产品的数据连续性.
- 为水库监测和分析提供必要的数据.
主要方法:
- 利用了美国宇航局可见红外成像放射仪套件 (VIIRS) 卫星数据.
- 开发了算法来推导164个全球大型水库的水库面积,海拔,储存和蒸发率.
- 评估了VIIRS衍生数据和现场测量之间的一致性,以及VIIRS和MODIS GWR产品之间的一致性.
主要成果:
- 基于VIIRS的GWR产品为关键水库参数提供8天和每月的数据.
- 独立验证显示,储储存 (R2=0.84) 和蒸发率 (R2=0.56) 的表现强.
- VIIRS和MODIS GWR组件之间的高一致性 (R2≥0.90) 证实了长期数据连续性.
结论:
- 新的基于VIIRS的GWR产品可提供重要的水库数据的可靠延续.
- 这一数据集对于长期趋势分析,水文建模和了解水气候极端情况非常有价值.
- 确保全球水资源的不间断监测,以提高水源安全.
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