PIKART Version 1.1: Release Notes

Sara Vallejo-Bernal, Tobias Braun, Norbert Marwan , Jürgen Kurths

The PIK Atmospheric River Trajectories (PIKART) catalog is a global, high-resolution catalog of atmospheric rivers (ARs). Version 1.1 (v1.1) addresses two algorithmic bugs present in version 1.0 (v1.0): a boundary artifact at 30°E emerging during the extraction of the background component of the integrated vapor transport (IVT), and an error in the AR tracking algorithm that affected the evaluation of genesis and termination at time steps with no overlap between AR shapes and AR trajectories. In addition, v1.1 incorporates several minor corrections and improvements, including a bug fix in the calculation of rank 4 in the AR scale, an extension of the temporal domain to fully cover the years 2024 and 2025, an updated spatial grid aligned with the ECMWF standard, and compatibility with the restructured Copernicus Climate Data Store (CDS). The catalog is available at https://ar.pik-potsdam.de.