Running Doubly-Periodic Experiment: Difference between revisions

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==Data files for doubly periodic experiment==

You will need an appropriate tile file named DPXXX.til where XXX is the resolution you are running. In addition since the OGCM_IM and OGCM_JM must be 1 you will need appropriately modified kpar.data, sst.data, and fraci.data files.

==Overview==

The doubly periodic capability in GEOS-5 allows one to run a simulation on an arbitrary Cartesian domain with periodicity in both dimensions.

==Setup==

A doubly periodic code is run through GEOSgcm.x like full the model. in the fvcore_layout.rc file the size of the domain is specified in meters like so:

dx_const: 13000

dy_const: 13000

Thus for a given IM and JM you have a domain IMxJM grid on a Cartesian domain with size dx_const by dy_const. For now the domain and grid should be square, i.e. IM = JM.

==Example AGCM.rc==

Below is snippets showing what needs to be changed in the AGCM.rc to perform a doubly periodic run.

Below is snippets showing what needs to be changed in the AGCM.rc to perform a doubly periodic run. Note the change in the grid name that alerts the model this is a doubly periodic setup.

The most critical are the FIXED_LATS and FIXED_LONS keywords which tell where the cell is located. The CASE_ID, T0, and CASE_TRACERS values should be the values in the example below unless new cases get added in the future.

<pre>

# Atmospheric Model Configuration Parameters

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Line 158:

</pre>

==Other files==

In addition you will need an appropriate tile file name DPXXX.til where XXX is the resolution as well as appropriate fraci.data, kpar.data, and sst.data files

@@ Line 1: / Line 1: @@
 ==Data files for doubly periodic experiment==
 You will need an appropriate tile file named DPXXX.til where XXX is the resolution you are running. In addition since the OGCM_IM and OGCM_JM must be 1 you will need appropriately modified kpar.data, sst.data, and fraci.data files.
+==Overview==
+The doubly periodic capability in GEOS-5 allows one to run a simulation on an arbitrary Cartesian domain with periodicity in both dimensions.
+==Setup==
+A doubly periodic code is run through GEOSgcm.x like full the model. in the fvcore_layout.rc file the size of the domain is specified in meters like so:
+dx_const: 13000
+dy_const: 13000
+Thus for a given IM and JM you have a domain IMxJM grid on a Cartesian domain with size dx_const by dy_const. For now the domain and grid should be square, i.e. IM = JM.
 ==Example AGCM.rc==
-Below is snippets showing what needs to be changed in the AGCM.rc to perform a doubly periodic run.
+Below is snippets showing what needs to be changed in the AGCM.rc to perform a doubly periodic run. Note the change in the grid name that alerts the model this is a doubly periodic setup.
+The most critical are the FIXED_LATS and FIXED_LONS keywords which tell where the cell is located. The CASE_ID, T0, and CASE_TRACERS values should be the values in the example below unless new cases get added in the future.
 <pre>
 # Atmospheric Model Configuration Parameters
@@ Line 147: / Line 158: @@
 </pre>
+==Other files==
+In addition you will need an appropriate tile file name DPXXX.til where XXX is the resolution as well as appropriate fraci.data, kpar.data, and sst.data files