EGUsphere EGUsphere EGUsphere EGUsphere Copernicus Publications Göttingen, Germany 10.5194/egusphere-2025-1142 A Python diagnostics package for evaluation of MJO-Teleconnections in S2S forecast systems Stan Cristiana https://orcid.org/0000-0002-0076-0574 1 Kollapaneni Saisri 1 Jenney Andrea https://orcid.org/0000-0003-3784-6627 2 Wang Jiabao 3 Wu Zheng https://orcid.org/0000-0002-2054-5724 4 Zheng Cheng https://orcid.org/0000-0002-8039-346X 5 6 Kim Hyemi 7 Garfinkel Chaim https://orcid.org/0000-0001-7258-666X 8 Singh Ayush 2 Department of Atmospheric, Oceanic and Earth Sciences, George Mason University, Fairfax, Virginia, USA College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, USA Center for Western Weather and Water Extremes, Scripps Institute of Oceanography, University of California, San Diego, USA Department of Atmospheric and Environmental Sciences, University at Albany, SUNY, Albany, USA Lamont-Doherty Earth Observatory, Columbia University, USA School of Marine and Atmospheric Sciences, Stony Brook University, USA Department of Science Education, Ewha Womans University, Seoul, Republic of Korea The Fredy and Nadine Hermann Institute of Earth Sciences, Hebrew University of Jerusalem, Jerusalem, Israel 20 03 2025 2025 1 22 Copyright: © 2025 Cristiana Stan et al. 2025 This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/ This article is available from https://egusphere.copernicus.org/preprints/2025/egusphere-2025-1142/ The full text article is available as a PDF file from https://egusphere.copernicus.org/preprints/2025/egusphere-2025-1142/egusphere-2025-1142.pdf

The MJO-Teleconnections diagnostics package is an open-source Python software package that provides process-level evaluation of MJO-Teleconnections predicted by subseasonal-to-seasonal (S2S) forecast systems. The package provides in-depth process-level evaluation of both tropospheric and stratospheric pathways defining the atmospheric teleconnections from the tropics to extratropics on S2S times scale. The analyses include comparison of a forecast model with a default verification data set or user-provided verification data. The package consists of a user-friendly graphic user interface (GUI), which allows the package to be applied to both operational and research models. This approach allows for efficient data management and reproducibility of analysis.

 NOAA Weather Program Office NA22OAR4590216