###########################################################
#    The following list specifies details about the
#    the use of variables in the Solver internal 
#    state for use in nests.  The names of the
#    internal state variables are on the left and
#    their desciption is on the right.
###########################################################
 
###########################################################
#    The first specification column indicates which 
#    variables on the nest boundaries are updated by
#    the parent.  An 'H' means the given variable lies
#    on H points while a 'V' means the variable lies
#    on a V point.
###########################################################
 
###########################################################
#    The second column for each variable indicates 
#    if it is involved in shifts of moving nests.
#    Users need to exercise caution if they edit
#    that column.
#
#    Key: H - Shift this mass point variable.
#         V - Shift this velocity point variable.
#         F - Shift this mass point variable with intra-
#             and inter-task routines but read in values
#             from external nest-resolution datafiles
#             within the parent update regions.
#         L - Shift this land sfc variable.
#         W - Shift this water sfc variable.
#         x - The parent must execute a halo exchange
#             for this variable each time one of its 
#             children moves.
###########################################################

###########################################################
#    The third column indicates which variables are
#    to be used in 2-way exchange of data from a child
#    to its parent.  An 'H' means the given variable will
#    be used and lies on H points while a 'V' means the
#    variable is to be used and lies on a V point.
###########################################################
 
#------------------------------------------------------------
# Name          Specifications          Variable Description
#------------------------------------------------------------

#           BC      Moving     2-way


###  2D integer

'ISLTYP'     -         F         -      'Soil type'
'IVGTYP'     -         F         -      'Vegetation type'
'NCFRCV'     -         -         -      'Number of times convective cloud fraction >0 between outputs'
'NCFRST'     -         -         -      'Number of times stratiform cloud fraction >0 between outputs'


###  2D real

'FIS'        -         F         -      'Surface geopotential (m2 s-2)'
'HDACX'      -         -         -      'Horiz diffusion param in X for H pts'
'HDACY'      -         -         -      'Horiz diffusion param in Y for H pts'
'GLAT'       -         -         -      'Latitudes of h points  (radians)'
'GLON'       -         -         -      'Longitudes of h points (radians)'
'GLAT_DBL'   -         -         -      'Dbl precision latitudes of h points  (radians)'
'GLON_DBL'   -         -         -      'Dbl precision longitudes of h points  (radians)'
'PD'         H         H         -      'Pressure difference, sigma range  (Pa)'
'F'          -         -         -      'Coriolis parameter (s-1)'
'HDACVX'     -         -         -      'Lateral diffusion coefficient in X'
'HDACVY'     -         -         -      'Lateral diffusion coefficient in Y'
'VLAT'       -         -         -      'Latitudes of V points  (radians)'
'VLON'       -         -         -      'Longitudes of V points (radians)'
'VLAT_DBL'   -         -         -      'Dbl precision latitudes of V points  (radians)'
'VLON_DBL'   -         -         -      'Dbl precision longitudes of V points  (radians)'
'PDO'        -         Hx        -      'Previous pressure difference, sigma range  (Pa)'

'ACFRCV'     -         -         -      'Accumulated convective cloud fractions between outputs'
'ACFRST'     -         -         -      'Accumulated statiform cloud fractions between outputs'
'ACPREC'     -         Hx        -      'Accumulated precip  (m)'
'ACPREC_TOT' -         Hx        -      'Accumulated total precip  (m)'
'ACSNOM'     -         -         -      'Accumulated melted snow  (?)'
'ACSNOW'     -         -         -      'Accumulated snow  (?)'
'AKHS_OUT'   -         -         -      'Sfc exch coeff T and q  (m2 s-1)'
'AKMS_OUT'   -         -         -      'Sfc exch coeff momentum  (m2 s-1)'
'ALBASE'     -         F         -      'Base albedo'
'ALBEDO'     -         Hx        -      'Dynamic albedo'
'ALWIN'      -         -         -      'Accumulated LW down at surface  (W m-2)'
'ALWOUT'     -         -         -      'Accumulated LW from the ground  (W m-2)'
'ALWTOA'     -         -         -      'Accumulated LW at top of atmosphere  (W m-2)'
'ASWIN'      -         -         -      'Accumulated SW down at surface  (W m-2)'
'ASWOUT'     -         -         -      'Accumulated SW up at ground  (W m-2)'
'ASWTOA'     -         -         -      'Accumulated SW at top of atmosphere  (W m-2)'
'BGROFF'     -         -         -      'Subsurface runoff  (mm)'
'CFRACH'     -         -         -      'High atmosphere cloud fraction'
'CFRACL'     -         -         -      'Low atmosphere cloud fraction'
'CFRACM'     -         -         -      'Mid atmosphere cloud fraction'
'CLDEFI'     -         Hx        -      'Convective cloud efficiency'
'CMC'        -         Lx        -      'Canopy moisture  (m)'
'CNVBOT'     -         Hx        -      'Lowest convec cloud bottom model lyr between outputs'
'CNVTOP'     -         Hx        -      'Highest convec cloud top model lyr between outputs'
'CPRATE'     -         Hx        -      'Instantaneous convective precipitation'
'CUPPT'      -         Hx        -      'Convective precip between radiation calls  (m)'
'CUPREC'     -         Hx        -      'Conv precip  (m)'
'CZEN'       -         Hx        -      'Current cosine of solar zenith angle'
'CZMEAN'     -         Hx        -      'Mean cosine of solar zenith angle between radiation calls'
'EPSR'       -         Hx        -      'Surface longwave emissivity'
'GRNFLX'     -         -         -      'Deep soil heat flux  (W m-2)'
'HBOTD'      -         Hx        -      'Bottom model layer of deep convective cloud for output'
'HBOTS'      -         Hx        -      'Bottom model layer of shallow convective cloud for output'
'HTOPD'      -         Hx        -      'Top model layer of deep convective cloud for output'
'HTOPS'      -         Hx        -      'Top model layer of shallow convective cloud for output'
'MIXHT'      -         -         -      'Mixed layer height  (m)'
'MXSNAL'     -         F         -      'Maximum deep snow albedo'
'PBLH'       -         -         -      'PBL height  (m)'
'POTEVP'     -         -         -      'Accumulated potential evaporation (m)'
'PREC'       -         -         -      'Precip within physics timestep  (m)'
'PSHLTR'     -         Hx        -      'Pressure at 2-m  (Pa)'
'Q10'        -         -         -      'Specific humidity at 10-m  (kg k-1)'
'QSH'        -         Hx        -      'Surface specific humidity  (kg kg-1)'
'QSHLTR'     -         -         -      'Specific humidity at 2-m  (kg kg-1)'
'QWBS'       -         Hx        -      'Instantaneous latent heat flux (W m-2)'
'QZ0'        -         Hx        -      'Specific humidity at top of viscous sublayer  (kg kg-1)'
'RADOT'      -         -         -      'Longwave from the ground  (W m-2)'
'RLWIN'      -         -         -      'Longwave down at ground  (W m-2)'
'RLWTOA'     -         -         -      'Longwave at top of atmosphere  (W m-2)'
'RSWIN'      -         -         -      'Shortwave down at ground  (W m-2)'
'RSWINC'     -         -         -      'Clear-sky shortwave down at ground  (W m-2)'
'RSWOUT'     -         -         -      'Shortwave up at ground  (W m-2)'
'SFCEVP'     -         -         -      'Surface evaporation  (?)'
'SFCEXC'     -         -         -      'Another surface exchange coefficient for T and q (?) (m2 s-1) (see AKHS_OUT)'
'SFCLHX'     -         Hx        -      'Accumulated sfc latent heat flux (W m-2)'
'SFCSHX'     -         Hx        -      'Accumulated sfc sensible heat flux (W m-2)'
'SI'         -         -         -      'Snow depth  (m)'
'SICE'       -         Wx        -      'Sea ice fraction'
'SIGT4'      -         -         -      'Sigma*T**4  (W m-2)'
'SM'         -         F         -      'Sea mask (1=>sea ; 0=>land)'
'SMSTAV'     -         -         -      'Soil moisture availability for evapotranspiration'
'SMSTOT'     -         -         -      'Total soil moisture  (?)'
'SNO'        -         -         -      'Liquid water snow amount  (m)'
'SNOPCX'     -         -         -      'Snow phase change heat flux  (W m-2)'
'SOILTB'     -         Lx        -      'Deep ground soil temperature  (K)'
'SR'         -         -         -      'Timestep mass ratio of snow:precip'
'SSROFF'     -         -         -      'Surface runoff  (mm)'
'SST'        -         Wx        -      'Sea sfc temperature  (K)'
'SUBSHX'     -         -         -      'Accumulated deep soil heat flux (W m-2)'
'TG'         -         F         -      'Deep ground soil temperature  (K)'
'TH10'       -         -         -      'Theta at 10-m  (K)'
'THS'        -         Hx        -      'Surface theta  (K)'
'THZ0'       -         Hx        -      'Theta at top of viscous sublayer  (K)'
'TSHLTR'     -         -         -      'Theta at 2-m again  (K)'
'TWBS'       -         Hx        -      'Instantaneous sensible heat flux (W m-2)'
'U10'        -         Hx        -      'U at 10-m  (m s-1)'
'U10MAX'     -         Hx        -      'Hourly maximum U at 10-m  (m s-1)'
'USTAR'      -         Hx        -      'Friction velocity  (m s-1)'
'UZ0'        -         Hx        -      'U component at top of viscous sublayer  (m s-1) (H points)'
'V10'        -         Hx        -      'V at 10-m  (m s-1)'
'V10MAX'     -         Hx        -      'Hourly maximum V at 10-m  (m s-1)'
'VEGFRC'     -         F         -      'Vegetation fraction'
'VZ0'        -         Hx        -      'V component at top of viscous sublayer  (m s-1) (H points)'
'Z0'         -         Hx        -      'Roughness length  (m)'
'TSKIN'      -         Hx        -      'Skin temperature  (K)'
'AKHS'       -         Hx        -      'Sfc exch coeff T and q divided by delta Z  (m s-1)'
'AKMS'       -         Hx        -      'Sfc exch coeff momentum divided by delta Z  (m s-1)'
'HBOT'       -         Hx        -      'Bottom model layer of convective cloud for radiation'
'HTOP'       -         Hx        -      'Top model layer of convective cloud for radiation'
'RSWTOA'     -         -         -      'Shortwave at top of atmosphere  (W m-2)'
'POTFLX'     -         -         -      'Energy equivalent of POTEVP (W m-2)'
'RMOL'       -         -         -      'Reciprocal of Monin-Obukhov length  (m-1)'
'T2'         -         -         -      'Temperature 2-m  (K)'
'Z0BASE'     -         -         -      'Background roughness length  (m)'
'PSFC'       -         -         -      'Surface Pressure (Pa)'
'TLMIN'      -         -         -      'Hourly minimum temperature'
'TLMAX'      -         -         -      'Hourly maximum temperature'
'LSPA'       -         -         -      'Land surface precipitation accumulation'
'ACUTIM'     -         -         -      'post0/bufr counter in summing cloud processes (conv, grid)'
'APHTIM'     -         -         -      'post0/bufr counter in summing other physics (turb, land, rad)'
'ARDLW'      -         -         -      'Counter in summing LW radiation flux'
'ARDSW'      -         -         -      'Counter in summing SW radiation flux'
'ASRFC'      -         -         -      'Counter in summing surface fluxes'
'AVRAIN'     -         -         -      'Counter in summing latent heating from grid microphysics'
'AVCNVC'     -         -         -      'Counter in summing latent heating from convection'


###  3D real

'T'          H         H         H      'Sensible temperature  (K)'
'Q'          H         H         H      'Specific humidity  (kg kg-1)'
'U'          V         V         V      'U wind component  (m s-1)'
'V'          V         V         V      'V wind component  (m s-1)'
'Q2'         -         H         -      '2*tke  (m2 s-2)'
'CW'         H         H         H      'Cloud condensate  (kg kg-1)'
'W'          -         H         -      'Vertical velocity at midlayers  (m s-1)'
'DWDT'       -         H         -      'Vertical acceleration, correction factor  (m s-2)'
'PINT'       -         H         -      'Nonhydrostatic interface pressure  (Pa)'
'OMGALF'     -         -         -      'Omega-alpha  (K)'
'O3'         -         H         -      'Ozone'
'DIV'        -         -         -      'Horizontal mass divergence'
'TCU'        -         Vx        -      'Time change of U (m s-2)'
'TCV'        -         Vx        -      'Time change of V (m s-2)'
'TCT'        -         Hx        -      'Time change of T (K s-1)'
'TP'         -         Hx        -      'Sensible temperature, previous step  (K)'
'UP'         -         Vx        -      'U wind component, previous step  (m s-1)'
'VP'         -         Vx        -      'V wind component, previous step  (m s-1)'
'PSGDT'      -         -         -      'Specific volume  (m3 kg-1)'
'Z'          -         Hx        -      'Height at midlayers  (m)'

'CLDFRA'     -         -         -      'Cloud fraction'
'EXCH_H'     -         Hx        -      'Turbulent exchange coefficient for heat  (m2 s-1)'
'RLWTT'      -         Hx        -      'Radiative T tendency, longwave  (K s-1)'
'RSWTT'      -         Hx        -      'Radiative T tendency, shortwave (K s-1)'
'TCUCN'      -         Hx        -      'Accumulated convective T tendency  (K s-1)'
'TRAIN'      -         Hx        -      'Accumulated stratiform T tendency  (K s-1)'
'XLEN_MIX'   -         -         -      'Mixing length  (m)'
'F_ICE'      -         Hx        -      'Fraction of condensate that is ice'
'F_RIMEF'    -         Hx        -      'Rime factor'
'F_RAIN'     -         Hx        -      'Rain fraction of liquid part of CWM'
'SH2O'       -         Lx        -      '3D unfrozen soil moisture/soil liquid water'
'SMC'        -         Lx        -      '3D total soil moisture content (volumetric fraction)'
'STC'        -         Lx        -      '3D soil temperature (K)'

###  4D real

'TRACERS'       -        -        -      'All tracer variables'
'TRACERS_PREV'  -        -        -      'Previous step tracers'

#EOF