| 1 | subroutine calc_cpp_mugaz |
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| 2 | |
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| 3 | !================================================================== |
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| 4 | ! Purpose |
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| 5 | ! ------- |
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| 6 | ! Computes atmospheric specific heat capacity and |
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| 7 | ! mean molar mass for the gas mixture defined in gases.def |
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| 8 | ! with standard values. |
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| 9 | ! In 1d, one can force the model to adopt these standard values |
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| 10 | ! by setting cpp_mugaz_mode=2 in callfis.def. |
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| 11 | ! |
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| 12 | ! Authors |
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| 13 | ! ------- |
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| 14 | ! Robin Wordsworth (2009) |
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| 15 | ! A. Spiga: make the routine OK with latest changes in rcm1d |
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| 16 | ! Jeremy Leconte (2022) |
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| 17 | ! |
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| 18 | !================================================================== |
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| 19 | |
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| 20 | use gases_h |
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| 21 | use comcstfi_mod, only: cpp, mugaz |
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| 22 | use callkeys_mod, only: cpp_mugaz_mode |
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| 23 | use mod_phys_lmdz_para, only : is_master |
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| 24 | implicit none |
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| 25 | |
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| 26 | character(len=20),parameter :: myname="calc_cpp_mugaz" |
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| 27 | real cpp_c |
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| 28 | real mugaz_c |
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| 29 | |
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| 30 | integer igas |
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| 31 | |
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| 32 | cpp_c = 0.0 |
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| 33 | mugaz_c = 0.0 |
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| 34 | |
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| 35 | |
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| 36 | ! compute mugaz |
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| 37 | do igas=1,ngasmx |
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| 38 | |
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| 39 | if(igas.eq.vgas)then |
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| 40 | ! ignore variable gas in cpp calculation |
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| 41 | else |
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| 42 | ! all values at 300 K from Engineering Toolbox |
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| 43 | if(igas.eq.igas_CO2)then |
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| 44 | mugaz_c = mugaz_c + 44.01*gfrac(igas) |
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| 45 | elseif(igas.eq.igas_N2)then |
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| 46 | mugaz_c = mugaz_c + 28.01*gfrac(igas) |
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| 47 | elseif(igas.eq.igas_O2)then |
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| 48 | mugaz_c = mugaz_c + 31.999*gfrac(igas) |
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| 49 | elseif(igas.eq.igas_H2)then |
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| 50 | mugaz_c = mugaz_c + 2.01*gfrac(igas) |
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| 51 | elseif(igas.eq.igas_He)then |
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| 52 | mugaz_c = mugaz_c + 4.003*gfrac(igas) |
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| 53 | elseif(igas.eq.igas_H2O)then |
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| 54 | mugaz_c = mugaz_c + 18.02*gfrac(igas) |
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| 55 | elseif(igas.eq.igas_SO2)then |
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| 56 | mugaz_c = mugaz_c + 64.066*gfrac(igas) |
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| 57 | elseif(igas.eq.igas_H2S)then |
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| 58 | mugaz_c = mugaz_c + 34.08*gfrac(igas) |
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| 59 | elseif(igas.eq.igas_CH4)then |
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| 60 | mugaz_c = mugaz_c + 16.04*gfrac(igas) |
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| 61 | elseif(igas.eq.igas_NH3)then |
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| 62 | mugaz_c = mugaz_c + 17.03*gfrac(igas) |
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| 63 | elseif(igas.eq.igas_C2H6)then |
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| 64 | ! C2H6 http://encyclopedia.airliquide.com/Encyclopedia.asp?GasID=28 |
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| 65 | mugaz_c = mugaz_c + 30.07*gfrac(igas) |
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| 66 | elseif(igas.eq.igas_C2H2)then |
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| 67 | ! C2H2 http://encyclopedia.airliquide.com/Encyclopedia.asp?GasID=1 |
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| 68 | mugaz_c = mugaz_c + 26.04*gfrac(igas) |
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| 69 | ! GG MODIF JAN2019 |
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| 70 | elseif(igas.eq.igas_CO)then |
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| 71 | mugaz_c = mugaz_c + 28.01*gfrac(igas) |
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| 72 | elseif(igas.eq.igas_OCS)then |
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| 73 | ! https://pubchem.ncbi.nlm.nih.gov/compound/carbonyl_sulfide |
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| 74 | mugaz_c = mugaz_c + 60.0751*gfrac(igas) |
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| 75 | elseif(igas.eq.igas_HCl)then |
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| 76 | mugaz_c = mugaz_c + 36.46*gfrac(igas) |
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| 77 | elseif(igas.eq.igas_HF)then |
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| 78 | mugaz_c = mugaz_c + 20.01*gfrac(igas) |
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| 79 | else |
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| 80 | if (is_master) then |
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| 81 | print*,'Error in calc_cpp_mugaz: Gas species not recognised!' |
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| 82 | endif |
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| 83 | call abort_physic(myname,'Gas species not recognised!',1) |
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| 84 | endif |
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| 85 | endif |
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| 86 | |
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| 87 | enddo |
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| 88 | |
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| 89 | !compute cpp |
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| 90 | do igas=1,ngasmx |
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| 91 | |
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| 92 | if(igas.eq.vgas)then |
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| 93 | ! ignore variable gas in cpp calculation |
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| 94 | else |
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| 95 | ! all values at 300 K from Engineering Toolbox |
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| 96 | if(igas.eq.igas_CO2)then |
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| 97 | !cpp_c = cpp_c + 0.744*gfrac(igas) ! @ ~210 K (better for |
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| 98 | !Mars conditions) |
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| 99 | cpp_c = cpp_c + 0.846*gfrac(igas)*44.01/mugaz_c |
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| 100 | elseif(igas.eq.igas_N2)then |
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| 101 | cpp_c = cpp_c + 1.040*gfrac(igas)*28.01/mugaz_c |
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| 102 | elseif(igas.eq.igas_O2)then |
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| 103 | cpp_c = cpp_c + 0.918*gfrac(igas)*31.999/mugaz_c |
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| 104 | elseif(igas.eq.igas_H2)then |
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| 105 | cpp_c = cpp_c + 14.31*gfrac(igas)*2.01/mugaz_c |
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| 106 | elseif(igas.eq.igas_He)then |
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| 107 | cpp_c = cpp_c + 5.19*gfrac(igas)*4.003/mugaz_c |
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| 108 | elseif(igas.eq.igas_H2O)then |
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| 109 | cpp_c = cpp_c + 1.864*gfrac(igas)*18.02/mugaz_c |
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| 110 | elseif(igas.eq.igas_SO2)then |
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| 111 | cpp_c = cpp_c + 0.64*gfrac(igas)*64.066/mugaz_c |
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| 112 | elseif(igas.eq.igas_H2S)then |
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| 113 | cpp_c = cpp_c + 1.003*gfrac(igas)*34.08/mugaz_c ! from wikipedia... |
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| 114 | elseif(igas.eq.igas_CH4)then |
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| 115 | cpp_c = cpp_c + 2.226*gfrac(igas)*16.04/mugaz_c |
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| 116 | elseif(igas.eq.igas_NH3)then |
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| 117 | cpp_c = cpp_c + 2.175*gfrac(igas)*17.03/mugaz_c |
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| 118 | print*,'WARNING, cpp for NH3 may be for liquid' |
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| 119 | elseif(igas.eq.igas_C2H6)then |
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| 120 | ! C2H6 |
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| 121 | ! http://encyclopedia.airliquide.com/Encyclopedia.asp?GasID=28 |
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| 122 | cpp_c = cpp_c + 1.763*gfrac(igas)*30.07/mugaz_c |
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| 123 | elseif(igas.eq.igas_C2H2)then |
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| 124 | ! C2H2 |
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| 125 | ! http://encyclopedia.airliquide.com/Encyclopedia.asp?GasID=1 |
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| 126 | cpp_c = cpp_c + 1.575*gfrac(igas)*26.04/mugaz_c |
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| 127 | !!!!! MODIF GG JAN 2019 (check source values !!) |
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| 128 | elseif(igas.eq.igas_CO)then |
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| 129 | cpp_c = cpp_c + 1.0425*gfrac(igas)*28.01/mugaz_c |
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| 130 | elseif(igas.eq.igas_OCS)then |
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| 131 | cpp_c = cpp_c + 0.6909*gfrac(igas)*60.07/mugaz_c |
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| 132 | elseif(igas.eq.igas_HCl)then |
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| 133 | cpp_c = cpp_c + 1.7087*gfrac(igas)*36.46/mugaz_c |
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| 134 | elseif(igas.eq.igas_HF)then |
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| 135 | cpp_c = cpp_c + 1.4553*gfrac(igas)*20.01/mugaz_c |
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| 136 | else |
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| 137 | if (is_master) then |
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| 138 | print*,'Error in calc_cpp_mugaz: Gas species not recognised!' |
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| 139 | endif |
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| 140 | call abort_physic(myname,'Gas species not recognised!',1) |
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| 141 | endif |
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| 142 | endif |
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| 143 | |
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| 144 | enddo |
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| 145 | |
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| 146 | |
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| 147 | |
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| 148 | |
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| 149 | |
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| 150 | cpp_c = 1000.0*cpp_c |
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| 151 | |
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| 152 | if (is_master) then |
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| 153 | print*,'Cp in calc_cpp_mugaz is ',cpp_c,'J kg^-1 K^-1' |
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| 154 | print*,'Mg in calc_cpp_mugaz is ',mugaz_c,'amu' |
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| 155 | endif |
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| 156 | |
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| 157 | if(((abs(1.-cpp/cpp_c).gt.1.e-6) .or. & |
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| 158 | (abs(1.-mugaz/mugaz_c).gt.1.e-6)).and. is_master ) then |
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| 159 | ! Ehouarn: tolerate a small mismatch between computed/stored values |
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| 160 | print*,'--> Values do not match with the predefined one ! (',cpp,',',mugaz,')' |
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| 161 | print*,' Because cp varies with temperature and that some gases may not appear in gases.def,' |
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| 162 | print*,' a small discrepancy might be completely normal.' |
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| 163 | print*,' But you might want to check that!' |
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| 164 | print*,' If you want to use the values calculated here, adjust cpp / mugaz in the dynamics via newstart (3d)' |
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| 165 | print*,' or use cpp_mugaz_mode=2 (if you are in 1d).' |
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| 166 | endif |
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| 167 | |
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| 168 | if (cpp_mugaz_mode==2) then |
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| 169 | if (is_master) print*,'*** cpp_mugaz_mode==2, so setting cpp & mugaz to computations in calc_cpp_mugaz.' |
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| 170 | mugaz = mugaz_c |
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| 171 | cpp = cpp_c |
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| 172 | else |
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| 173 | if (is_master) print*,'*** Leaving cpp & mugaz equal to predefined values' |
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| 174 | if (is_master) print*,'(either from dynamics (cpp_mugaz_mode=0) or callfis (cpp_mugaz_mode=1)).' |
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| 175 | endif |
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| 176 | |
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| 177 | |
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| 178 | end subroutine calc_cpp_mugaz |
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