:orphan:

Update SSTs at the Initial Time Only
====================================

When SST data are added to the model at the initial time only, the SST field is used as a constant field for all time periods of the simulation. 

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Geogrid
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The *geo_em.d01.nc* output file from the Single Domain exercise will be used for this exercise. If you do not have this file, go back to the `Single Domain`_ exercise and repeat the geogrid section. 

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Run Ungrib to Unpack SST Data Files
-----------------------------------

In addition to SST input, the *FILE:* intermediate-formatted data will be used for this exercise. If you do not have this file, go back to the `Single Domain`_ exercise and repeat the ungrib section.

To unpack the SST files, follow the instructions below.

#. Move into the *WPS/* directory. 
#. Open *namelist.wps* and make changes so that it uses the same settings as below. 

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.. _`Single Domain`: ./single_domain_exercise.html