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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