C $Header: /home/ubuntu/mnt/e9_copy/MITgcm/pkg/ebm/EBM.h,v 1.4 2009/08/06 13:52:52 jmc Exp $
C $Name:  $
C
C     CountX - number of ocean points in each latitude band
C     ZonalMeanSST - zonal mean sea surface temperature
C     TmlS   - Average mid-latitude temperature in the
c              Southern Hemisphere
C     TmlN   - Northern
C     TtS    - Average tropical temperature in the Southern Hemisphere
C     TtN    -                                     Northern
C     winPert - weather  patterns added to the background wind.
      COMMON /EBM_FLD_RL/
     &               ZonalMeanSST, CountX,
     &               TmlN, TmlS, TtN, TtS
      _RL ZonalMeanSST(1-OLy:sNy+OLy,nSy)
      _RL CountX(1-OLy:sNy+OLy,nSy)
      _RL TmlS, TmlN, TtS, TtN

      COMMON /EBM_FLD_RS/
     &               Run,
     &               winPert
      _RS Run      (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
      _RS winPert  (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)

      COMMON /EBM_PARAM_C/
     &               RunoffFile
      CHARACTER*(MAX_LEN_FNAM) RunoffFile

      COMMON /EBM_PARAM_RL/
     &               tauThetaZonRelax,
     &               lambdaThetaZonRelax,
     &               scale_runoff
      _RL tauThetaZonRelax
      _RL lambdaThetaZonRelax
      _RL scale_runoff

C     Constant parameters
      _RL t_mlt, lv, cp, rho_air
      PARAMETER ( t_mlt = 273.15 _d 0 )
      PARAMETER ( lv = 2.5 _d 6 )
      PARAMETER ( cp = 1004. _d 0 )
      PARAMETER ( rho_air = 1.27 _d 0 )
C     sin(lat) and Legendre polynomials
cph We will make these three (i,j) arrays to
cph avoid AD recomputations
      _RL S(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSy)
      _RL P2(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSy)
      _RL P4(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSy)
C     Shortwave and albedo parameters
      _RL SW(1-OLy:sNy+OLy,nSy)
      _RL Q0, Q2, A0, A2, A4
      PARAMETER ( Q0 = 1365. _d 0 , Q2 = -0.482 _d 0 )
      PARAMETER ( A0 = 0.322 _d 0 , A2 = 0.231 _d 0 , A4 = 0.086 _d 0  )
C     Longwave parameters
      _RL LW(1-OLy:sNy+OLy,nSy)
      _RL LW0, LW1
      PARAMETER ( LW0 = 195. _d 0 , LW1 = 2.78 _d 0 )
C     Heat transport parameters
      _RL Hd(1-OLy:sNy+OLy,nSy), Hd35(2)
      _RL H1, H3, H5
      PARAMETER ( H1 = 3.866 _d 0 , H3 = -2.851 _d 0 , H5 = -1.016 _d 0 )
C     Freshwater flux parameters
      _RL Fw(1-OLy:sNy+OLy,nSy), Fw35(2)
      _RL F1, F2, F3, F4, F5
      PARAMETER ( F1 = 2.092 _d 0 , F2 = 5.796 _d 0 , F3 = 8.472 _d 0 )
      PARAMETER ( F4 = 7.728 _d 0 , F5 = 2.362 _d 0  )
C     Temperature parameterization
      _RL T(1-OLy:sNy+OLy,nSy)
      _RL T_var(4), T0(2), T2(2), T35(2), DTDy35(2)
C     Parameters used to calculate the transport efficiency
      _RL Cl, Cf, Cs, C
      _RL gamma, kappa, De
      _RL trans_eff, Hw, Nw, Tw, At, dz, htil, tau
      PARAMETER ( trans_eff = 2. _d 0 , Hw = 8. _d 3, Nw = 0.013 _d 0 )
      PARAMETER ( Tw = 300. _d 0 , At = 3. _d 0 , dz = 450. _d 0 )
      PARAMETER ( htil = 0.8 _d 0 , tau = 5. _d -3)
C     Climate change parameter (W/(m^2 y) )
      _RL DLW
      PARAMETER (DLW = 0.06 _d 0 )
C     Latitude boundaries used
      _RL lat(3)
      DATA lat / 0. _d 0 ,  35. _d 0 ,  85. _d 0  /