This dataset contains daily clearsky-related atmospheric and surface parameters derived from NASA's Modern-Era Retrospective analysis for Research and Applications, Version 2 (MERRA-2). The data covers the period from 1999 to 2018 globally, at its native resolution, and is stored in a cloud-optimized format to support the worldwide evaluation of clear-sky solar irradiance with the SPARTA model (Ruiz-Arias, 2024) via… See the full description on the dataset page: https://huggingface.co/datasets/josearuizarias/merra2-daily-clearsky.