ratefac.F90

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!+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
!
!  Function :  r a t e f a c
!
!> @file
!!
!! Rate factor for cold ice:
!! Linear interpolation of tabulated values in RF(.).
!!
!! @section Copyright
!!
!! Copyright 2009-2013 Ralf Greve
!!
!! @section License
!!
!! This file is part of SICOPOLIS.
!!
!! SICOPOLIS is free software: you can redistribute it and/or modify
!! it under the terms of the GNU General Public License as published by
!! the Free Software Foundation, either version 3 of the License, or
!! (at your option) any later version.
!!
!! SICOPOLIS is distributed in the hope that it will be useful,
!! but WITHOUT ANY WARRANTY; without even the implied warranty of
!! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
!! GNU General Public License for more details.
!!
!! You should have received a copy of the GNU General Public License
!! along with SICOPOLIS.  If not, see <http://www.gnu.org/licenses/>.
!<
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!-------------------------------------------------------------------------------
!> Rate factor for cold ice:
!! Linear interpolation of tabulated values in RF(.).
!<------------------------------------------------------------------------------
function ratefac(temp_val, temp_m_val)

use sico_types
use sico_variables

implicit none
real(dp)             :: ratefac
real(dp), intent(in) :: temp_val, temp_m_val

real(dp) :: temp_h_val

temp_h_val = temp_val-temp_m_val

ratefac = rf(floor(temp_h_val)) &
          +(rf(floor(temp_h_val)+1)-rf(floor(temp_h_val))) &
           *(temp_h_val-real(floor(temp_h_val),dp))

end function ratefac
!