Daily Snow Cover Fraction (SCF) for the nine river basins across Europe (1st October 2017 - 30th September 2023)

The Snow Cover Fraction (SCF) product is based on high-resolution snow cover. The product is generated through a data fusion method that relies on a low-resolution SCF product and a high-resolution product, both based on optical data. In detail, the high-resolution snow cover is derived from Sentinel-2. For the Adige river basin the SnowFLAKES classification method is used to produce snow cover maps - see Barella, R., Marin, C., Gianinetto, M., & Notarnicola, C. (2022, July). A novel approach to high resolution snow cover fraction retrieval in mountainous regions. In IGARSS 2022-2022 IEEE International Geoscience and Remote Sensing Symposium (pp. 3856-3859). IEEE.) For the other basins, the Copernicus Fractional Snow Cover (FSC) product is used (see https://land.copernicus.eu/en/products/snow/fractional-snow-cover). Regarding the low-resolution SCF product, MOD10A1 product derived from MODIS is used (see https://nsidc.org/data/mod10a1/versions/61). For details about the data fusion approach, see the method proposed by Premier et al., 2021. The dataset contains daily SCF information (0 - 100 %) per pixel. The product is aggregated at the spatial resolution of the LISFLOOD model (i.e., approximately 1.4 km). Water bodies are masked out (no data are marked here as -999). The dataset is used to evaluate the snow module of the LISFLOOD model and to calibrate the snowmelt coefficient.积雪覆盖率（Snow Cover Fraction, SCF）产品基于高分辨率积雪数据构建。 该产品通过数据融合方法生成，融合过程依赖两类均基于光学数据的产品：低分辨率积雪覆盖率产品与高分辨率积雪产品。具体而言，高分辨率积雪数据源自Sentinel-2卫星。针对阿迪杰河流域，采用SnowFLAKES分类方法生成积雪覆盖图——详见Barella R、Marin C、Gianinetto M与Notarnicola C（2022年7月）发表于《2022 IEEE国际地球科学与遥感研讨会（IGARSS 2022-2022 IEEE International Geoscience and Remote Sensing Symposium）》的论文《山地高分辨率积雪覆盖率反演新方法（A novel approach to high resolution snow cover fraction retrieval in mountainous regions）》（第3856-3859页，IEEE出版）。针对其他流域，则采用哥白尼积雪覆盖率（Fractional Snow Cover, FSC）产品（详见https://land.copernicus.eu/en/products/snow/fractional-snow-cover）。关于低分辨率积雪覆盖率产品，采用源自中分辨率成像光谱仪（Moderate Resolution Imaging Spectroradiometer, MODIS）的MOD10A1产品（详见https://nsidc.org/data/mod10a1/versions/61）。有关数据融合方法的细节，请参考Premier等人2021年提出的方案。 本数据集包含逐像素的日度积雪覆盖率信息（取值范围0~100%）。产品聚合至LISFLOOD模型的空间分辨率（约1.4公里）。水体区域已被掩膜，无数据标记为-999。本数据集用于评估LISFLOOD模型的积雪模块，并率定融雪系数。