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Parallel Ocean Program (POP) User Guide

Version 2.1

Los Alamos National Laboratory

23 March 2003

LACC 99-18

Revised for Community Earth System Model

National Center for Atmospheric Research

10 June 2010


This version of the POP User Guide, a modification of the original 2003 Los Alamos National Laboratory (LANL) document, contains detailed instructions for operating the Community Earth System Model (CESM) version of the POP2 model.

Topics include:

Throughout this manual, it is assumed that the operating system is some variant of Unix. However, stand-alone LANL POP has been run on PCs under windows.

CESM users who want to gain a more in-depth understanding of the model physics are encouraged to read the User's Guide companion document, The Parallel Ocean Program (POP) Reference Manual.

If you are using POP as a component of the NCAR Community Earth System Model, technical support is provided by NCAR (

CESM Notes

The CESM version of the Parallel Ocean Program User Guide, which you are now reading, is based on the LANL version, but it has been customized to include information about CESM-specific POP options. Important CESM information has been noted throughout this guide: in the text, special subsections labeled "CESM1 Notes" have been added and in tables, new CESM columns appear.

Send CESM POP2 bug reports to the CESM helpdesk at

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