ICON-O: The Ocean Component of the ICON Earth System Model - Global Simulation Characteristics and Local Telescoping Capability

Abstract

The Max Planck Institute for Meteorology (MPI-M) has a long tradition in developing global ocean models (Maier-Reimer et al., 1993;Marsland et al., 2003;Wolff et al., 1997). The ocean general circulation model ICON-O continues this tradition. ICON-O constitutes the ocean and sea ice component of MPI-M's Earth system model ICON-ESM, described in Jungclaus et al. (2022), and schematically illustrated in Figure 1. The name "ICON" (Icosahedral Nonhydrostatic Weather and Climate Model) denotes a modeling framework and a weather and climate modeling system that is jointly developed by MPI-M, the German Weather Service (DWD), the German Climate Computing Center (DKRZ), and the Karlsruhe Institute of Technology. The ICON modeling system addresses seamlessly modeling for climate research as well as for numerical weather prediction. ICON's ocean component ICON-O was developed at MPI-M. This paper provides a scientific documentation of ICON-O in uncoupled mode through an analysis of the simulated global ocean circulation. We demonstrate the model's