8.6 Example: ECMWF meteo produced by TMPP

This section describes the settings for ECMWF meteo produced by TMPP.

8.6.1 Setup files

To retrieve/unpack/link all TMPP files for a 'glb3x2/eur3x2/eur1x1' run use for example the following settings in the rcfile:

        tmm.setup.001.apply    :  T
        tmm.setup.001.files    :  uvsp w spm t q cld sub surf
        tmm.setup.001.sources  :  tmpp:class=od;type=fc;levs=ml60;grid=glb3x2;tres=_21p06 tmpp:class=od;type=fc;levs=ml25;grid=eur1x1;tres=_21p06
        tmm.setup.001.search   :  /shared/kelder/TM/meteo

Basic meteo archives where the script should search:

        ! SARA disk archive:
        tmm.setup.001.search   :  /shared/kelder/TM/meteo
        ! ECMWF tape archive:
        tmm.setup.001.search   :  ecfs:/nlh/TM/meteo
        ! KNMI tape archive:
        tmm.setup.001.search   :  mos:/fa/ks/TM/meteo

8.6.2 Sourcekeys

The read the files into TM5, use for example the following source keys:

        tmm.sourcekey.glb6x4.*  : tmpp:class=od;type=fc;levs=ml60;grid=glb3x2;tres=_21p06
        tmm.sourcekey.eur3x2.*  : tmpp:class=od;type=fc;levs=ml60;grid=glb3x2;tres=_21p06
        tmm.sourcekey.eur1x1.*  : tmpp:class=od;type=fc;levs=ml25;grid=eur1x1;tres=_21p06
        tmm.sourcekey.glb1x1.*  : tmpp:class=od;type=fc;levs=sfc;grid=glb1x1;tres=_21p03

Some special settings:

• TM5 assumes by default that files have been installed in the directory specified by 'tmm.dir' in long format:

          ${tmm.dir}/od-fc-2000-01-ml60-glb3x2-uvsp_20000101_21p03.hdf
  

  This is for example how the 'tm5_tmm_setup' script stores the files.
  However, if the day files are present in a directory structure, e.g.:

          ${tmm.dir}/od/fc/2000/01/ml60/glb3x2/uvsp_20000101_21p03.hdf
  

  then add an extra flag that '/' should be used to seperate parts of the filename rather than '-' :

          tmm.sourcekey.glb6x4.*  : tmpp:class=od;type=fc;levs=ml60;grid=glb3x2;tres=_21p06;namesep=/
  

• On a Windows file system with full expanded files, e.g.

          D:\tmm.dir\od\fc\2000\01\ml60\glb3x2\uvsp_20000101_21p03.hdf
  

  add extra keys to define the path and name seperations:

          tmm.sourcekey.glb6x4.*  : tmpp:class=od;type=fc;levs=ml60;grid=glb3x2;tres=_21p06;pathsep=\;namesep=\
  

• To have a more relaxed time checking, set the 'qad' (=quick-and-dirty) flag to 'T' (true) :

          tmm.sourcekey.glb6x4.*  : tmpp:class=od;type=fc;levs=ml60;grid=glb3x2;tres=_21p06;qad=T
  

• For Age-of-Ernstig experiments the option 'fixyear' has been implemented to be able to run the model from 2000 to say 2020, while recycling the meteo from 2000 for each of the years:

          tmm.sourcekey.glb6x4.*  : tmpp:class=od;type=fc;levs=ml60;grid=glb3x2;tres=_21p06;fixyear=2000
  

• In cy3, field sstr=sqrt(ewss^2+nsss^2) is depricated; instead, ewss and nsss are used. This to avoid that always an exception has to be implemented when reading surface streess. Since 'ewss' and 'nsss' are not available in the TMPP meteo files, the 'sstr' field should be used instead and distributed equaly:

          ewss = sqrt( 0.5 * sstr^2 )
          nsss = sqrt( 0.5 * sstr^2 )
  

  To achive this, an extra flag has to be added to the sourcekey:

          tmm.sourcekey.glb1x1.*  : tmpp:class=od;type=fc;levs=sfc;grid=glb1x1;tres=_21p03;sstr=T
  

8.6.3 Temporal interpolation

The following table shows the possible time interpolations for this meteo set (see table 8.1 for the meteo fields covered by a key):

tmm.tinterp.	const3	const6	interp3	interp6	interp6_3	aver3	aver6	aver24	aver24_3
sp			x	x	x
mflux_uv		x		x
mflux_w		x		x
temper		x		x
humid		x		x
cloud		x		x
convec		x		x
surf.inst	x		x
surf.aver						x
surf.day									x
albedo									x
sr									x

Example:

• To run on TMPP meteo in the old (good-old?) way, use:

          meteo.tinterp.*          :  const6
          meteo.tinterp.sp         :  interp6_3
          meteo.tinterp.surf.inst  :  const3
          meteo.tinterp.surf.aver  :  aver3
          meteo.tinterp.surf.day   :  aver24_3
  

  Note that the setting 'const3' for the surface fields requires that each 1.5 hour is the end of a dynamic time step, since the instantaneous are told to be valid for intervals [-1:30,1:30], [1:30,4:30] etc., while temperature etc are told to be valid for intervals [-3:00,3:00], [3:00,9:00] etc.:

          time.ntimestep  : 5400
  

  Older TM5 version were able to use other (larger) time steps too: the value of the surface field at the begin of the dynamic time step was used during the whole dynamic step regardless wether the value changed during this interval or not.
• To run on TMPP meteo as time interpolated as possible, use:

          meteo.tinterp.*          :  interp6
          meteo.tinterp.sp         :  interp6
          meteo.tinterp.surf.inst  :  interp3
          meteo.tinterp.surf.aver  :  aver3
          meteo.tinterp.surf.day   :  aver24_3