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!Environment Canada - Atmospheric Science and Technology License/Disclaimer, 
!                     version 3; Last Modified: May 7, 2008.
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#if defined (DOC)
*
***comdeck vtw.cdk
*
*author M.Tanguay
*
* revision
* v3_31 - Tanguay M.    - initial MPI version
*
*______________________________________________________________________
*                                                                      |
*  VMM variables at TIME tw (t2 work space)                            |
*______________________________________________________________________|
*                    |                                                 |
* NAME               | DESCRIPTION                                     |
*--------------------|-------------------------------------------------|
* utw                | x component of velocity                         |
* vtw                | y component of velocity                         |
* wtw                | z component of velocity                         |
* ttw                | T (temperature)                                 |
* tdtw               | total divergence (dpi* dot / dpi* + D )         |
* fitw               | phi (geopotential)                              |
* qtw                | q = ln p                                        |
*--------------------|-------------------------------------------------|
* tptw               | T'       \                                      |
* fiptw              | phi'      \  perturbations                      |
* qptw               | q'        /                                     |
* piptw              | pi'      /                                      |
*--------------------|-------------------------------------------------|
* tpltw              | T'  linear                                      |
*--------------------|-------------------------------------------------|
* mutw               | nonhydro index mu=dp/dpi-1 [= 0 if hydro]       |
* psdtw              | pi* dot (vert. vel. in pi* coord.)              |
* stw                | ln (pi_s/z_s)                                   |
*--------------------|-------------------------------------------------|
* trtw               | passive tracer(s)                               |
*--------------------|-------------------------------------------------|
*
#endif
*
      MARK_COMMON_BEG(vtw)
      DCL_VMMVAR( vtw,   utw, real, (LDIST_SHAPE,l_nk) )
      DCL_VMMVAR( vtw,   vtw, real, (LDIST_SHAPE,l_nk) )
      DCL_VMMVAR( vtw,   wtw, real, (LDIST_SHAPE,l_nk) )
      DCL_VMMVAR( vtw,   ttw, real, (LDIST_SHAPE,l_nk) )
      DCL_VMMVAR( vtw,  tdtw, real, (LDIST_SHAPE,l_nk) )
      DCL_VMMVAR( vtw,  fitw, real, (LDIST_SHAPE,l_nk) )
      DCL_VMMVAR( vtw,   qtw, real, (LDIST_SHAPE,l_nk) )
      DCL_VMMVAR( vtw,  tptw, real, (LDIST_SHAPE,l_nk) )
      DCL_VMMVAR( vtw, fiptw, real, (LDIST_SHAPE,l_nk) )
      DCL_VMMVAR( vtw,  qptw, real, (LDIST_SHAPE,l_nk) )
      DCL_VMMVAR( vtw, piptw, real, (LDIST_SHAPE,l_nk) )
      DCL_VMMVAR( vtw, tpltw, real, (LDIST_SHAPE,l_nk) )
      DCL_VMMVAR( vtw,  mutw, real, (LDIST_SHAPE,l_nk) )
      DCL_VMMVAR( vtw, psdtw, real, (LDIST_SHAPE,l_nk) )
      DCL_VMMVAR( vtw,   stw, real, (LDIST_SHAPE)      )
      DCL_VMMVAR( vtw,  trtw, real, (LDIST_SHAPE,l_nk,*) )
      MARK_COMMON_END(vtw)

      character*8 vtw_n_first(1)
      equivalence (vtw_n_first,VMM_NAM(utw))