source: trunk/LMDZ.COMMON/libf/evolution/criterion_ice_stop_mod_slope.F90 @ 2842

Last change on this file since 2842 was 2835, checked in by romain.vande, 3 years ago

Mars PEM:
Introduction of the possibility to follow an orbital forcing.
Introduction of new control parameters.
Cleaning of the PEM (removing unused files, add comments and new files)

A file named run_PEM.def can be added to the run.def. It contains the following variables:

_ evol_orbit_pem: Boolean. Do you want to follow an orbital forcing predefined (read in ob_ex_lsp.asc for example)? (default=false)
_ year_bp_ini: Integer. Number of year before present to start the pem run if evol_orbit_pem=.true. , default=0
_ Max_iter_pem: Integer. Maximal number of iteration if none of the stopping criterion is reached and if evol_orbit_pem=.false., default=99999999
_ dt_pem: Integer. Time step of the PEM in year, default=1
_ alpha_criterion: Real. Acceptance rate of sublimating ice surface change, default=0.2
_ soil_pem: Boolean. Do you want to run with subsurface physical processes in the PEM? default=.true.

RV
File size: 2.8 KB
Line 
1!
2! $Id $
3!
4SUBROUTINE criterion_ice_stop_slope(cell_area,ini_surf,qsurf,STOPPING,ngrid,initial_h2o_ice,global_ave_press_GCM,global_ave_press_new,nslope)
5
6  USE temps_mod_evol, ONLY: alpha_criterion
7  use comslope_mod, ONLY: subslope_dist
8
9      IMPLICIT NONE
10
11!=======================================================================
12!
13!  Routine that checks if the criterion to stop the PEM is reached
14!
15!=======================================================================
16
17!   arguments:
18!   ----------
19
20!   INPUT
21  INTEGER, intent(in) :: ngrid,nslope                  ! # of grid physical grid points
22  REAL,    intent(in) :: cell_area(ngrid)              ! physical point field : Area of the cells
23  REAL,    intent(in) ::  qsurf(ngrid,nslope)          ! physical point field : Actual density of water ice
24  REAL,    intent(in) :: ini_surf
25  REAL,    intent(in) :: initial_h2o_ice(ngrid,nslope)
26  REAL,    intent(in) :: global_ave_press_GCM
27  REAL,    intent(in) :: global_ave_press_new
28
29!   OUTPUT
30  LOGICAL, intent(out) :: STOPPING              ! Logical : is the criterion reached?
31
32!   local:
33!   -----
34  INTEGER :: i,islope   ! Loop
35  REAL :: present_surf  ! Initial/Actual surface of water ice
36
37!=======================================================================
38
39!   initialisation to false
40    STOPPING=.FALSE.
41
42!   computation of the actual surface
43  present_surf=0.
44  do i=1,ngrid
45   do islope=1,nslope
46      if (initial_h2o_ice(i,islope).GT.0.5 .and. qsurf(i,islope).GT.0.) then
47         present_surf=present_surf+cell_area(i)*subslope_dist(i,islope)
48      endif
49   enddo
50  enddo
51 
52!   check of the criterion
53  if(present_surf.LT.ini_surf*(1-alpha_criterion) .OR. &
54     present_surf.GT.ini_surf*(1+alpha_criterion)) then
55    STOPPING=.TRUE.
56    print *, "Reason of stopping : The surface of co2 ice sublimating reach the threshold:"
57    print *, "Current surface of co2 ice sublimating=", present_surf
58    print *, "Initial surface of co2 ice sublimating=", ini_surf
59    print *, "Percentage of change accepted=", alpha_criterion*100
60    print *, "present_surf<ini_surf*(1-alpha_criterion)", (present_surf.LT.ini_surf*(1-alpha_criterion))
61  endif
62
63  if (ini_surf.LT. 1E-5 .and. ini_surf.GT. -1E-5) then
64       STOPPING=.FALSE.
65  endif
66
67  if(global_ave_press_new.LT.global_ave_press_GCM*(0.9) .OR. &
68     global_ave_press_new.GT.global_ave_press_GCM*(1.1)) then
69    STOPPING=.TRUE.
70    print *, "Reason of stopping : The global pressure reach the threshold:"
71    print *, "Current global pressure=", global_ave_press_new
72    print *, "GCM global pressure=", global_ave_press_GCM
73    print *, "Percentage of change accepted=", 0.1*100
74    print *, "global_ave_press_new<global_ave_press_GCM*(0.9)", (global_ave_press_new.LT.global_ave_press_GCM*(0.9))
75  endif
76
77END SUBROUTINE criterion_ice_stop_slope
78
79
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