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Next: 3.11.3 Selecting an advection Up: 3.11 Gyre Advection Example Previous: 3.11.1 Advection and tracer   Contents

3.11.2 Introducing a tracer into the flow

The MITgcm ptracers package (see section 6.3.3 for a more complete discussion of the ptracers package and section 6.1 for a general introduction to MITgcm packages) provides pre-coded support for a simple passive tracer with an initial distribution at simulation time $ t=0$ of $ C_0(x,y,z)$ . The steps required to use this capability are

  1. Activating the ptracers package. This simply requires adding the line ptracers to the packages.conf file in the code/ directory for the experiment.
  2. Setting an initial tracer distribution.

Once the two steps above are complete we can proceed to examine how the tracer we have created is carried by the flow field and what properties of the tracer distribution are preserved under different advection schemes.


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