Uncertainties associated with the IMERG Multi-Satellite precipitation product

This study compares the NASA Integrated Multi-satellitE Retrievals for GPM (IMERG) satellite precipitation product with the satellite radar-based GPM Ku-Ka 2ADPR product across the contiguous United States (CONUS) at 0.1° and half-hourly resolution. Results are shown in terms of performance and Taylor's diagrams, which provide a concise description of several validation metrics. The dependence of each error statistic is assessed as a function of climate region and season. The quantification of error estimates associated with the GPM product allows inferences about the reliability of this satellite precipitation dataset and will enhance its deployment for forecasting climate and weather variations, extreme events mitigation (floods and droughts), agricultural planning, and water resources management.