Subversion Repositories tropofold.echam

Tropopause folding calculator:
(*original reference to be added*)

original work by B.Skerlak (bojan.skerlak@env.ethz.ch)
extended for netcdf data by A.Pozzer (andrea.pozzer@mpic.de)

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To use the algorithm:

1) Extract the zip file 
2) Modify the Makefile to the current machine set-up
3) Compile to code with the command "make".
   Other options possible with "make help".
4) Create a namelist file (filename.nml) with the specific of the
   netcdf files to be analyzed (see EMAC.nml for example).
5) run the code with the command "3d_labelling_and_fold_id.exe filename.nml"

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NML format:
the namelist file should contain the following fields:
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&CTRL
! input file (path included)
file_input = '/ptmp/andrep/ZANIS/ZANIS__________20000801_0000_fold.nc'
! output file (path included) 
file_output = 'test.nc' 
! name of the longitude dimension in the file
X_name = 'lon'  
! name of the latitude dimension in the file
Y_name = 'lat'  
! name of the level dimension in the file
Z_name = 'lev'  
! name of the time dimension in the file
T_name = 'time'  
! name of the surface pressure
APS_name = 'aps'  
! name of the hybrid coefficient A
HYAM_name = 'hyam'  
! name of the hybrid coefficient B
HYBM_name = 'hybm'  
! name of the specific humidity field
Q_name = 'qm1'  
! name of the potential vorticity field
PV_name = 'PV' 
! name of the potential temperature field
PT_name = 'tpot' 
/
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WARNINGS:
1) The code works automatically only if all the needed data (i.e. Q,PV,PT)
   are included in the same input file.
2) Only hybrid pressure coordinates included in the pressure
   calculation.
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