A Python diagnostics package for evaluation of MJO-Teleconnections in S2S forecast systems

Abstract. 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.