USAP-DC

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Antarctic passive microwave Kmeans derived surface melt days, 1979-2020 Data DOI: https://doi.org/10.15784/601457 Cite as Johnson, A., Fahnestock, M., & Hock, R. (2021) "Antarctic passive microwave Kmeans derived surface melt days, 1979-2020" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601457. AMD - DIF Record(s) USAP-1543445_1 Abstract This dataset contains the total number of days per year with meltwater present at the surface across the Antarctic ice sheet and surrounding ice shelves derived from passive microwave satellite observations for each melt year from 1979/80 to 2019/20. This data comes from daily and near-daily SMMR, SSM/I, and SSMIS results at 25 km resolution at 19 GHz horizontal polarization. Each melt year starts on July 1 and ends June 30. The melt detection algorithm is described in Johnson and others (2020) and uses KMeans clustering analysis of the annual brightness temperature time series on each pixel to detect melt for that pixel and year. Creator(s): Johnson, Andrew; Hock, Regine; Fahnestock, Mark Date Created: 2021-06-22 Repository: USAP-DC (current) License: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0] Spatial Extent(s) West: -180, East: 180, South: -90, North: -60 Temporal Extent(s) Start: 1979-07-01 - End: 2020-06-30 Award(s) NSF 1543432 Version: 1 Related Project(s) Collaborative Research: Present and Projected Future Forcings on Antarctic Peninsula Glaciers and Ice Shelves using the Weather Forecasting and Research (WRF) Model References Johnson, A., Fahnestock, M., & Hock, R. (2020). Evaluation of passive microwave melt detection methods on Antarctic Peninsula ice shelves using time series of Sentinel-1 SAR. Remote Sensing of Environment, 250, 112044. (doi:10.1016/j.rse.2020.112044) Keywords Antarctica Antarctica Glaciers/ice Sheet Melt Days Passive Microwave Snow/ice Surface Melt