INTERFACE:
subroutine bottom_layer(nlev,h0,h,rho,u,v,NN,u_taus,u_taub, & tFlux,btFlux,sFlux,bsFlux,tRad,bRad,f)DESCRIPTION:
In this routine all computations related to turbulence in the bottom layer are performed. The algorithms are described in section 4.8. Note that these algorithms are affected by some pre-processor macros defined in cppdefs.inp, and by the parameters set in kpp.nml, see section 4.8.
The computation of the bulk Richardson number is slightly different from the surface boundary layer, since for the bottom boundary layer this quantity is defined as,
Also different from the surface layer computations is the absence of non-local fluxes.
USES:
IMPLICIT NONEINPUT PARAMETERS:
number of grid cells integer :: nlev bathymetry (m) REALTYPE :: h0 thickness of grid cells (m) REALTYPE :: h(0:nlev) potential density at grid centers (kg/m^3) REALTYPE :: rho(0:nlev) velocity components at grid centers (m/s) REALTYPE :: u(0:nlev),v(0:nlev) square of buoyancy frequency (1/s^2) REALTYPE :: NN(0:nlev) surface and bottom friction velocities (m/s) REALTYPE :: u_taus,u_taub bottom temperature flux (K m/s) and salinity flux (sal m/s) (negative for loss) REALTYPE :: tFlux,sFlux bottom buoyancy fluxes (m^2/s^3) due to heat and salinity fluxes REALTYPE :: btFlux,bsFlux radiative flux [ I(z)/(rho Cp) ] (K m/s) and associated buoyancy flux (m^2/s^3) REALTYPE :: tRad(0:nlev),bRad(0:nlev) Coriolis parameter (rad/s) REALTYPE :: fREVISION HISTORY:
Original author(s): Lars Umlauf