| 1 | MODULE recomp_orb_param_mod |
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| 2 | !======================================================================= |
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| 3 | ! |
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| 4 | ! Purpose: Recompute orbit parameters based on values by Laskar et al., |
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| 5 | ! |
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| 6 | ! Author: RV, JBC |
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| 7 | !======================================================================= |
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| 8 | IMPLICIT NONE |
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| 9 | |
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| 10 | CONTAINS |
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| 11 | |
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| 12 | SUBROUTINE recomp_orb_param(final_iter) |
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| 13 | |
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| 14 | USE temps_mod_evol, ONLY: year_bp_ini, year_PEM, var_obl, var_ex, var_lsp |
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| 15 | #ifndef CPP_STD |
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| 16 | USE comconst_mod, ONLY: pi |
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| 17 | USE planete_h, ONLY: e_elips, obliquit, timeperi, periheli,aphelie,p_elips,peri_day,year_day |
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| 18 | #else |
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| 19 | use planete_mod, only: e_elips, obliquit, timeperi,periastr,apoastr,p_elips,peri_day,year_day |
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| 20 | USE comcstfi_mod, only: pi |
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| 21 | |
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| 22 | #endif |
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| 23 | |
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| 24 | USE lask_param_mod, only: yearlask,oblask,exlask,lsplask, & |
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| 25 | end_lask_param_mod,last_ilask |
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| 26 | |
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| 27 | IMPLICIT NONE |
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| 28 | |
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| 29 | !-------------------------------------------------------- |
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| 30 | ! Input Variables |
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| 31 | !-------------------------------------------------------- |
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| 32 | |
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| 33 | integer,intent(in) :: final_iter ! Number of year iteration of the PEM |
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| 34 | |
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| 35 | !-------------------------------------------------------- |
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| 36 | ! Output Variables |
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| 37 | !-------------------------------------------------------- |
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| 38 | |
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| 39 | !-------------------------------------------------------- |
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| 40 | ! Local variables |
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| 41 | !-------------------------------------------------------- |
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| 42 | |
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| 43 | real :: Year ! Year of the simulation |
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| 44 | real :: Lsp ! time of peri in ls |
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| 45 | integer ilask ! Loop variable |
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| 46 | real :: halfaxe ! Million of km |
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| 47 | real :: unitastr |
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| 48 | |
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| 49 | real xa,xb,ya,yb |
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| 50 | |
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| 51 | |
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| 52 | ! ********************************************************************** |
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| 53 | ! 0. Initializations |
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| 54 | ! ********************************************************************** |
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| 55 | #ifdef CPP_STD |
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| 56 | real aphelie |
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| 57 | real periheli |
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| 58 | |
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| 59 | aphelie=apoastr |
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| 60 | periheli=periastr |
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| 61 | #endif |
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| 62 | |
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| 63 | Year = year_bp_ini + year_PEM + final_iter ! We compute the current year |
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| 64 | Lsp = 360. - timeperi*360./(2.*pi) ! We convert in degree |
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| 65 | |
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| 66 | ! Year=-953200 |
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| 67 | print*, "recomp_orb_param, Old year=", year_bp_ini+year_PEM |
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| 68 | print*, "recomp_orb_param, New year=", Year |
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| 69 | print*, "recomp_orb_param, Old obl=", obliquit |
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| 70 | print*, "recomp_orb_param, Old ex=", e_elips |
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| 71 | print*, "recomp_orb_param, Old lsp=", Lsp |
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| 72 | print*, "recomp_orb_param, Old timeperi=", timeperi |
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| 73 | |
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| 74 | do ilask = last_ilask,2,-1 |
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| 75 | xa = yearlask(ilask) |
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| 76 | xb = yearlask(ilask - 1) |
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| 77 | if (xa <= Year .and. Year < xb) then |
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| 78 | ! Obliquity |
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| 79 | if (var_obl) then |
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| 80 | ya = oblask(ilask) |
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| 81 | yb = oblask(ilask - 1) |
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| 82 | obliquit = (Year - xa)*(yb - ya)/(xb - xa) + ya |
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| 83 | endif |
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| 84 | |
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| 85 | ! Excentricity |
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| 86 | if (var_ex) then |
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| 87 | ya = exlask(ilask) |
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| 88 | yb = exlask(ilask - 1) |
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| 89 | e_elips = (Year - xa)*(yb - ya)/(xb - xa) + ya |
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| 90 | endif |
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| 91 | |
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| 92 | ! Lsp |
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| 93 | if (var_lsp) then |
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| 94 | ya = lsplask(ilask) |
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| 95 | yb = lsplask(ilask - 1) |
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| 96 | if (yb - ya > 300.) then ! If modulo is "crossed" |
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| 97 | if (ya < yb) then ! Increasing |
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| 98 | yb = yb - 360. |
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| 99 | else ! Decreasing |
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| 100 | yb = yb + 360. |
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| 101 | endif |
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| 102 | endif |
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| 103 | Lsp = (Year - xa)*(yb - ya)/(xb - xa) + ya |
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| 104 | Lsp = modulo(Lsp,360.) |
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| 105 | endif |
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| 106 | exit ! The loop is left as soon as the right interval is found |
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| 107 | endif |
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| 108 | enddo |
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| 109 | halfaxe = 227.94 |
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| 110 | timeperi = Lsp*2.*pi/360. |
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| 111 | periheli = halfaxe*(1 - e_elips) |
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| 112 | aphelie = halfaxe*(1 + e_elips) |
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| 113 | unitastr = 149.597927 |
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| 114 | p_elips = 0.5*(periheli + aphelie)*(1. - e_elips*e_elips)/unitastr |
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| 115 | #ifndef CPP_STD |
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| 116 | call call_dayperi(timeperi,e_elips,peri_day,year_day) |
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| 117 | #endif |
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| 118 | |
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| 119 | print*, "recomp_orb_param, Final year of the PEM run:", Year |
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| 120 | print*, "recomp_orb_param, New obl=", obliquit |
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| 121 | print*, "recomp_orb_param, New ex=", e_elips |
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| 122 | print*, "recomp_orb_param, New timeperi=", timeperi |
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| 123 | |
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| 124 | END SUBROUTINE recomp_orb_param |
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| 125 | |
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| 126 | !******************************************************************************** |
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| 127 | |
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| 128 | END MODULE recomp_orb_param_mod |
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