Accurate and robust geometric algorithms  for regridding on the sphere

Chen, Hongyu; Ullrich, Paul A.; Panetta, Julian; Marsico, David; Hanke, Moritz; Jain, Rajeev; Zhang, Chengzhu; Jacob, Robert L.

doi:10.5194/gmd-19-6545-2026

Articles | Volume 19, issue 14

https://doi.org/10.5194/gmd-19-6545-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/gmd-19-6545-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 14

Review and perspective paper

|

21 Jul 2026

Review and perspective paper |

| 21 Jul 2026

Accurate and robust geometric algorithms for regridding on the sphere

Hongyu Chen, Paul A. Ullrich, Julian Panetta, David Marsico, Moritz Hanke, Rajeev Jain, Chengzhu Zhang, and Robert L. Jacob

Supplement

https://doi.org/10.5194/gmd-19-6545-2026-supplement

Data sets

Reproducibility Archive for "Accurate and Robust Geometric Algorithms for Regridding on the Sphere'' Hongyu Chen et al. https://doi.org/10.5281/zenodo.17916264

Model code and software

Reproducibility Archive for "Accurate and Robust Geometric Algorithms for Regridding on the Sphere'' Hongyu Chen et al. https://doi.org/10.5281/zenodo.17916264

AccuSphGeom: Accurate and Robust Spherical Geometry Algorithms H. Chen https://doi.org/10.5281/zenodo.19896472

Short summary

Accurate data transfer between different grids is essential in climate and weather modeling. This study analyzes the geometric operations that underpin such transfers on the spherical Earth, identifies gaps and limitations in current methods, and introduces improved algorithms to ensure accuracy, reliability, and performance for next-generation modeling and data analysis systems.