modd_flake_paramoptic_ref.F90

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!SFX_LIC Copyright 1994-2014 CNRS, Meteo-France and Universite Paul Sabatier
!SFX_LIC This is part of the SURFEX software governed by the CeCILL-C licence
!SFX_LIC version 1. See LICENSE, CeCILL-C_V1-en.txt and CeCILL-C_V1-fr.txt  
!SFX_LIC for details. version 1.
! File %M% from Library %Q%
! Version %I% from %G% extracted: %H%
!------------------------------------------------------------------------------

MODULE modd_flake_paramoptic_ref

!------------------------------------------------------------------------------
!
! Description:
!
!  This module contains "reference" values of the optical characteristics
!  of the lake water, lake ice and snow. These reference values may be used 
!  if no information about the optical characteristics of the lake in question 
!  is available. An exponential decay law for the solar radiation flux is assumed.
!  In the simplest one-band approximation,
!  the extinction coefficient for water is set to a large value,
!  leading to the absorption of 95% of the incoming radiation 
!  within the uppermost 1 m of the lake water. 
!  The extinction coefficients for ice and snow are taken from 
!  Launiainen and Cheng (1998). The estimates for the ice correspond 
!  to the uppermost 0.1 m of the ice layer and to the clear sky conditions 
!  (see Table 2 in op. cit.).
!  Very large values of the extinction coefficients for ice and snow ("opaque")
!  can be used to prevent penetration of the solar radiation 
!  through the snow-ice cover.
!
!
! Current Code Owner: DWD, Dmitrii Mironov
!  Phone:  +49-69-8062 2705
!  Fax:    +49-69-8062 3721
!  E-mail: dmitrii.mironov@dwd.de
!
! History:
! Version    Date       Name
! ---------- ---------- ----
! 1.00       2005/11/17 Dmitrii Mironov 
!  Initial release 
! !VERSION!  !DATE!     <Your name>
!  <Modification comments>
!
! Code Description:
! Language: Fortran 90.
! Software Standards: "European Standards for Writing and
! Documenting Exchangeable Fortran 90 Code".
!==============================================================================
!
! Declarations:
!
! Modules used:

!USE modd_data_parameters, ONLY :      &
!    ireals                       ,  &! KIND-type parameter for real variables 
!    iintegers                        ! KIND-type parameter for "normal" integer variables  

USE modd_flake_derivedtypes, ONLY :   &
    nband_optic_max              ,  &! Maximum value of the wave-length bands
    opticpar_medium                  ! Derived TYPE   

!==============================================================================

IMPLICIT NONE

!==============================================================================
!
! Declarations
 
INTEGER , PRIVATE ::  &! Help variable(s)
    i                                      ! DO loop index  

!  Optical characteristics for water, ice and snow.
!  The simplest one-band approximation is used as a reference.
TYPE (opticpar_medium), PARAMETER ::                            &
    opticpar_water_ref = opticpar_medium(1,                       &! Water (reference)
      (/1., (0.,i=2,nband_optic_max)/),            &
      (/3., (1.E+10,i=2,nband_optic_max)/))      , &
    opticpar_water_trans = opticpar_medium(2,                              &! Transparent Water (two-band)
      (/0.10, 0.90, (0.,i=3,nband_optic_max)/),      &
      (/2.0, 0.20, (1.E+10,i=3,nband_optic_max)/)) , &
!_nu  opticpar_water_trans = opticpar_medium(1,                    & ! Transparent Water (one-band)
!_nu    (/1., (0.,i=2,nband_optic_max)/),            &
!_nu    (/0.30, (1.E+10,i=2,nband_optic_max)/))    , &
    opticpar_whiteice_ref = opticpar_medium(1,                    &! White ice
      (/1., (0.,i=2,nband_optic_max)/),               &
      (/17.1, (1.e+10,i=2,nband_optic_max)/))    , &
    opticpar_blueice_ref = opticpar_medium(1,                     &! Blue ice
      (/1., (0.,i=2,nband_optic_max)/),            &
      (/8.4, (1.e+10,i=2,nband_optic_max)/))     , &
    opticpar_drysnow_ref = opticpar_medium(1,                     &! Dry snow 
      (/1., (0.,i=2,nband_optic_max)/),            &
      (/25.0, (1.e+10,i=2,nband_optic_max)/))    , &
    opticpar_meltingsnow_ref = opticpar_medium(1,                 &! Melting snow 
      (/1., (0.,i=2,nband_optic_max)/),            &
      (/15.0, (1.e+10,i=2,nband_optic_max)/))    , &
    opticpar_ice_opaque = opticpar_medium(1,                      &! Opaque ice
      (/1., (0.,i=2,nband_optic_max)/),            &
      (/1.0e+07, (1.e+10,i=2,nband_optic_max)/)) , &
    opticpar_snow_opaque = opticpar_medium(1,                     &! Opaque snow
      (/1., (0.,i=2,nband_optic_max)/),            &
      (/1.0e+07, (1.e+10,i=2,nband_optic_max)/))   

!==============================================================================

END MODULE modd_flake_paramoptic_ref