Atmospherically-corrected AMSR-E/AMSR2 passive microwave brightness temperatures for the Arctic, 2002-present

Passive microwave brightness temperatures (TBs) from the Advanced Microwave Scanning Radiometer (AMSR) series, including AMSR-E and AMSR2, are widely used for ocean, ice, and snow monitoring in the Arctic. However, atmospheric absorption and emission, primarily by water vapor and cloud liquid water, affect the observed TBs from satellite and can propagate into geophysical retrievals. We present an atmospherically-corrected AMSR-E and AMSR2 TB dataset covering 2002-2025. The dataset contains dual-polarization TB observations at 6-89 GHz, collocated atmospheric and surface variables, as well as a quality-control flag. Atmospheric influence was estimated with a radiative transfer model driven by ERA5 reanalysis. Technical quality was assessed using water and sea ice samples and independent field measurements from the MOSAiC expedition. The dataset provides a combined record for evaluating and developing ocean, ice and snow retrieval methods in the Arctic.