Sigma coordinate system

A cross-section of the atmosphere over terrain with a sigma-coordinate representation shown. Mesoscale models divide the atmosphere vertically using representations similar to the one shown here.

The sigma coordinate system is a common coordinate system used in computational models for oceanography, meteorology and other fields where fluid dynamics are relevant.[1] This coordinate system receives its name from the independent variable used to represent a scaled pressure level.

Models that use a sigma coordinate system include the Princeton Ocean Model (POM),[2] the COupled Hydrodynamical Ecological model for REgioNal Shelf seas (COHERENS)[1], the ECMWF Integrated Forecast System, and various other numerical weather prediction models.

  1. ^ Janjic, Zavisa; Gall, Robert; Pyle, Matthew E. (February 2010). "Scientific Documentation for the NMM Solver" (PDF). National Center for Atmospheric Research. pp. 12–13. Archived from the original (PDF) on 2011-08-23. Retrieved 2011-01-03.
  2. ^ The Princeton Ocean Model, The Program in Atmospheric and Oceanic Sciences (AOS), Princeton University, archived from the original on 2010-07-02, retrieved 2010-11-13