Module surface_flux_mod

OVERVIEW

Driver program for the calculation of fluxes on the exchange grids.

OTHER MODULES USED

           fms_mod
 monin_obukhov_mod
sat_vapor_pres_mod
     constants_mod
           mpp_mod

PUBLIC INTERFACE

PUBLIC ROUTINES

1. surface_flux

   subroutine surface_flux ( & t_atm, q_atm_in, u_atm, v_atm, p_atm, z_atm, & p_surf, t_surf, t_ca, q_surf, & u_surf, v_surf, & rough_mom, rough_heat, rough_moist, rough_scale, gust, & flux_t, flux_q, flux_r, flux_u, flux_v, & cd_m, cd_t, cd_q, & w_atm, u_star, b_star, q_star, & dhdt_surf, dedt_surf, dedq_surf, drdt_surf, & dhdt_atm, dedq_atm, dtaudu_atm, dtaudv_atm, & dt, land, seawater, avail )

   
   

   DESCRIPTION

   For the calculation of fluxes on the exchange grids.

   
   
   

   INPUT

   t_atm	Air temp lowest atmospheric level.    [real, dimension(:)]
   q_atm	Mixing ratio at lowest atmospheric level (kg/kg).    [real, dimension(:)]
   u_atm	Zonal wind velocity at lowest atmospheric level.    [real, dimension(:)]
   v_atm	Meridional wind velocity at lowest atmospheric level.    [real, dimension(:)]
   p_atm	Pressure lowest atmospheric level.    [real, dimension(:)]
   z_atm	Height lowest atmospheric level.    [real, dimension(:)]
   p_surf	Pressure at the earth's surface    [real, dimension(:)]
   t_surf	Temp at the earth's surface    [real, dimension(:)]
   t_ca	Air temp at the canopy    [real, dimension(:)]
   u_surf	Zonal wind velocity at earth surface.    [real, dimension(:)]
   v_surf	Meridional wind velocity at earth surface.    [real, dimension(:)]
   rough_mom	Momentum roughness length    [real, dimension(:)]
   rough_heat	Heat roughness length    [real, dimension(:)]
   rough_moist	<Moisture roughness length    [real, dimension(:)]
   rough_scale	Scale factor used to topographic roughness calculation    [real, dimension(:)]
   gust	Gustiness factor    [real, dimension(:)]
   land	Indicates where land exists (true if exchange cell is on land).    [logical, dimension(:)]
   seawater	Indicates where liquid ocean water exists (true if exchange cell is on liquid ocean water).    [logical, dimension(:)]
   avail	True where the exchange cell is active.    [logical, dimension(:)]

   
   

   OUTPUT

   q_surf	Mixing ratio at earth surface (kg/kg).    [real, dimension(:)]
   flux_t	Sensible heat flux    [real, dimension(:)]
   flux_q	Evaporative water flux    [real, dimension(:)]
   flux_r	Radiative energy flux    [real, dimension(:)]
   flux_u	Zonal momentum flux    [real, dimension(:)]
   flux_v	Meridional momentum flux    [real, dimension(:)]
   cd_m	Momentum exchange coefficient    [real, dimension(:)]
   cd_t	Heat exchange coefficient    [real, dimension(:)]
   cd_q	Moisture exchange coefficient    [real, dimension(:)]
   w_atm	Absolute wind at the lowest atmospheric level    [real, dimension(:)]
   u_star	Turbulent velocity scale    [real, dimension(:)]
   b_star	Turbulent buoyant scale    [real, dimension(:)]
   q_star	Turbulent moisture scale    [real, dimension(:)]
   dhdt_surf	Sensible heat flux temperature sensitivity    [real, dimension(:)]
   dedt_surf	Moisture flux temperature sensitivity    [real, dimension(:)]
   dedq_surf	Moisture flux humidity sensitivity    [real, dimension(:)]
   drdt_surf	Radiative energy flux temperature sensitivity    [real, dimension(:)]
   dhdt_atm	Derivative of sensible heat flux over temp at the lowest atmos level.    [real, dimension(:)]
   dedq_atm	Derivative of water vapor flux over temp at the lowest atmos level.    [real, dimension(:)]
   dtaudu_atm	Derivative of zonal wind stress w.r.t the lowest level zonal wind speed of the atmos    [real, dimension(:)]
   dtaudv_atm	Derivative of meridional wind stress w.r.t the lowest level meridional wind speed of the atmos    [real, dimension(:)]
   dt	Time step (it is not used presently)    [real]

   
   

NAMELIST