Satellite-Derived Daily Dissolved Organic Carbon Concentrations across Six Major Arctic River channels (2000–2025)

This dataset contains satellite-derived, daily-resolution estimates of dissolved organic carbon (DOC) concentration along satellite-resolvable river channels of six major Arctic rivers: the Ob, Yenisey, Lena, Kolyma, Yukon and Mackenzie. Daily river-channel DOC concentrations for 2000–2025 were reconstructed using river-specific random forest models trained with in situ DOC measurements collected at the river outlets and 500-m MODIS MCD43A4 Collection 6.1 Nadir Bidirectional Reflectance Distribution Function Adjusted Reflectance (NBAR) data. The dataset is provided as single-band GeoTIFF rasters and organized into one ZIP archive per year, comprising 26 annual archives for 2000–2025. A small number of dates are absent because valid MODIS observations were unavailable. Annual archive naming convention:Arctic_Six_River_Channel_DOC_Daily_YYYY.zip Individual raster naming convention:YYYY-MM-DD-Arctic-channel-DOC.tif DOC concentrations are expressed in milligrams per litre (mg L−1). Pixels without valid DOC estimates are encoded as NoData.