MPAS Ocean User's Guide V6

<p>The Model for Prediction Across Scales-Ocean (MPAS-Ocean) is an unstructured-mesh ocean model</p> <p>capable of using enhanced horizontal resolution in selected regions of the ocean domain. Model</p> <p>domains may be spherical with bottom topography to simulate the earth's oceans, or on Cartesian</p> <p>domains for idealized experiments. The global meshes, created using Spherical Centroidal Voronoi</p> <p>Tesselations (Ringler et al., 2008, 2011) consist of gridcells that vary smoothly from low to high</p> <p>resolution regions. Numerical algorithms specially designed for these grids guarantee that mass,</p> <p>tracers, potential vorticity (in isopycnal mode) and energy are conserved (Thuburn et al., 2009;</p> <p>Ringler et al., 2010). MPAS-Ocean high-resolution and variable-resolution global simulations, as</p> <p>well as descriptions of mesh generation, model capabilities, and algorithms, are presented in Ringler</p> <p>et al. (2013a). The vertical grid is detailed in Petersen et al. (2014), including the Arbitrary</p> <p>Lagrangian Eulerian method, a variety of vertical coordinates, and results from five test cases.</p> <p>MPAS-Ocean is one component within the MPAS framework of climate models that is devel-</p> <p>oped in cooperation between Los Alamos National Laboratory (LANL) and the National Center</p> <p>for Atmospheric Research (NCAR). Functionality that is required by all cores, such as i/o, time</p> <p>management, block decomposition, etc, is developed collaboratively, and this code is shared across</p> <p>cores within the same repository. Each core then solves its own differential equations and physical</p> <p>parameterizations within this framework. This user's guide reflects the spirit of this collaborative</p> <p>process, where Part I, "The MPAS Framework", applies to all cores, and the remaining parts apply</p> <p>to MPAS-Ocean.</p> <p> </p> <p>This release of the ocean model corresponds with the initial release of the Energy Exascale</p> <p>Earth System Model (E3SM) by the U.S. Department of Energy (see https://e3sm.org/). E3SM</p> <p>includes MPAS components for ocean, sea ice, and land ice. Each component may be run as a</p> <p>stand-alone model, or coupled within E3SM. MPAS-Ocean now includes biogeochemistry modules,</p> <p>and the ability to control groups of tracers.</p> <p> </p> <p>Information about MPAS-Ocean, including the most recent code, user's guide, and test cases,</p> <p>may be found at http://mpas-dev.github.com. This user's guide refers to MPAS-Ocean version 6.</p>