Reconfiguration

Q How do I switch on the reconfiguration in FAMOUS?

To build the reconfiguration program:

In Sub-Model Independent → Modifications for the Reconfiguration

i) Select “compile & build”

ii) Ensure that you have the following mods included:

abort.mod

ctile6

dummy.mod

ibmf.mod

port_conv_f.mod

recon4837

timerupd_new.mod

To reconfigure the Atmosphere start file:

In Atmosphere → Ancillary and input data files → Start dump

Select “Using the reconfiguration”

To reconfigure an Ocean start file:

In Ocean GCM → Input Files → Start dump

Select “Using the reconfiguration”

Q What happens when FAMOUS reconfigures a UM start file?

The following Atmosphere fields differ (the Ocean is not affected):

23 : SNOW AMOUNT AFTER TIMESTEP KG/M2

24 : SURFACE TEMPERATURE AFTER TIMESTEP

31 : SEA ICE FRACTION AFTER TIMESTEP

32 : SEA ICE DEPTH (MEAN OVER ICE) M

49 : SEA-ICE TEMPERATURE AFTER TIMESTEP

407 : OPEN SEA SURFACE TEMP AFTER TIMESTEP

409 : SEA-ICE SURFACE TEMP AFTER TIMESTEP

412 : SEA ROUGHNESS LENGTH AFTER TIMESTEP

These results are from job xcbqe, an adtan-like job, with all ancillary fields set to be “not used”, i.e. those in:

Atmosphere → Ancillary and input data files

Ocean → Input Files

Plus energy adjustment switched off:

Atmosphere → Scientific Parameters and Sections → Section by section choices → Energy adjustment

To analyse the differences between the start files and reconfigured files, I used cumf

cumf file1 file2

To examine the actual differences, I used fieldop to subtract the values in one file from another.

fieldop -s file1 file2 fieldop.output

Or for example -t “26 222″ to subtract only the specified stashcodes. This produces a file which can be visualised using xconv. Note that if file1 contains fields which don’t exist in file2, it just copies file1’s field to the ouput file.

From FAMOUS

Main: Famous Reconfiguration

Reconfiguration