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POP - Parallel Ocean Program



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Fixed Vertical Coordinates POM SWAFS NCOM POP Lagrangian Vertical Coordinate NLOM Hybrid Vertical Coordinate HYCOM POP Parallel Ocean Program Primary contacts Mathew Maltrud Rick Smith Phil Jones LANL Julie McClean NPS POP is based on the ocean code of Bryan 1969 Cox 1970 1984 and Semtner 1974 It was reconfigured for massively parallel computers Smith et al 1992 and can be run as ocean only or coupled to air ice land components It will likely be used as the ocean component of a high resolution coupled synoptic prediction system at FNMOC It will also be used for next generation coupled climate prediction POP http climate acl lanl gov models pop http www oc nps navy mil navypop Full physics ocean general circulation model that includes packages to simulate mixed layer and other vertical and horizontal mixing processes It is designed to run on multiprocessor machines using domain decomposition in latitude and longitude A user manual and the code is available from the LANL web site listed above Some of the following material is taken from this manual Physics Primitive equation B grid Free surface Decoupled barotropic and baroclinic modes solved using implicit and explicit schemes respectively Several vertical mixing options are available Several horizontal mixing options for both momentum and tracers are available Variable depth partial bottom grid cells Domain POP is most commonly run in basin North Atlantic and global configurations The largest global POP domain run to date has 3600 x 2400 x 40 grid points The domain size can be constrained by architecture types North Atlantic POP domain Note that the Gulf of Mexico is wrapped into Africa for computational efficiency Courtesy J McClean Grid and Coordinate System POP can use a variety of grids as it allows any locally rectangular orthogonal coordinate system on a sphere Vertical coordinate z level Grids and topography are normally generated off line option to generate both horizontal and vertical grids and topography



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