| 1 | subroutine interpolateH2Ocont_CKD(wn,temp,presS,presF,abcoef,firstcall,ind) |
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| 2 | |
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| 3 | !================================================================== |
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| 4 | ! |
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| 5 | ! Purpose |
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| 6 | ! ------- |
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| 7 | ! Calculates the H2O continuum opacity, using a lookup table from |
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| 8 | ! Clough (2005). |
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| 9 | ! |
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| 10 | ! Authors |
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| 11 | ! ------- |
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| 12 | ! R. Wordsworth (2011) |
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| 13 | ! |
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| 14 | !================================================================== |
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| 15 | |
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| 16 | use datafile_mod, only: datadir |
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| 17 | implicit none |
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| 18 | |
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| 19 | ! input |
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| 20 | double precision wn ! wavenumber (cm^-1) |
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| 21 | double precision temp ! temperature (Kelvin) |
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| 22 | double precision presS ! self-pressure (Pascals) |
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| 23 | double precision presF ! foreign (air) pressure (Pascals) |
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| 24 | |
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| 25 | ! output |
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| 26 | double precision abcoef ! absorption coefficient (m^-1) |
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| 27 | |
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| 28 | integer nS,nT |
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| 29 | parameter(nS=1001) |
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| 30 | parameter(nT=11) |
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| 31 | |
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| 32 | double precision kB |
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| 33 | parameter(kB=1.3806488e-23) |
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| 34 | |
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| 35 | double precision amagatS, amagatF, abcoefS, abcoefF, Nmolec |
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| 36 | double precision wn_arr(nS) |
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| 37 | double precision temp_arr(nT) |
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| 38 | double precision abs_arrS(nS,nT) |
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| 39 | double precision abs_arrF(nS,nT) |
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| 40 | double precision data_tmp(nT) |
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| 41 | |
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| 42 | integer k,ind |
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| 43 | logical firstcall |
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| 44 | |
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| 45 | save wn_arr, temp_arr, abs_arrS, abs_arrF !read by master |
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| 46 | |
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| 47 | character*100 dt_file |
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| 48 | integer strlen,ios |
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| 49 | |
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| 50 | character(len=100) :: message |
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| 51 | character(len=10),parameter :: subname="H2OcontCKD" |
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| 52 | |
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| 53 | amagatS=(273.15/temp)*(presS/101325.0) |
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| 54 | amagatF=(273.15/temp)*(presF/101325.0) |
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| 55 | |
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| 56 | if(firstcall)then ! called by sugas_corrk only |
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| 57 | print*,'----------------------------------------------------' |
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| 58 | print*,'Initialising H2O continuum from MT_CKD data...' |
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| 59 | |
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| 60 | ! 1.1 Open the ASCII files |
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| 61 | |
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| 62 | !$OMP MASTER |
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| 63 | ! nu array |
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| 64 | dt_file=TRIM(datadir)//'/continuum_data/H2O_CONT_NU.dat' |
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| 65 | open(33,file=dt_file,form='formatted',status='old',iostat=ios) |
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| 66 | if (ios.ne.0) then ! file not found |
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| 67 | write(*,*) 'Error from interpolateH2O_cont' |
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| 68 | write(*,*) 'Data file ',trim(dt_file),' not found.' |
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| 69 | write(*,*)'Check that your path to datagcm:',trim(datadir) |
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| 70 | write(*,*)' is correct. You can change it in callphys.def with:' |
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| 71 | write(*,*)' datadir = /absolute/path/to/datagcm' |
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| 72 | message=' Also check that there is a continuum_data/H2O_CONT_NU.dat there.' |
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| 73 | call abort_physic(subname,message,1) |
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| 74 | else |
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| 75 | do k=1,nS |
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| 76 | read(33,*) wn_arr(k) |
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| 77 | enddo |
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| 78 | endif |
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| 79 | close(33) |
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| 80 | |
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| 81 | ! self broadening |
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| 82 | dt_file=TRIM(datadir)//'/continuum_data/H2O_CONT_SELF.dat' |
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| 83 | open(34,file=dt_file,form='formatted',status='old',iostat=ios) |
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| 84 | if (ios.ne.0) then ! file not found |
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| 85 | write(*,*) 'Error from interpolateH2O_cont' |
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| 86 | write(*,*) 'Data file ',trim(dt_file),' not found.' |
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| 87 | write(*,*)'Check that your path to datagcm:',trim(datadir) |
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| 88 | write(*,*)' is correct. You can change it in callphys.def with:' |
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| 89 | write(*,*)' datadir = /absolute/path/to/datagcm' |
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| 90 | message=' Also check that there is a continuum_data/H2O_CONT_SELF.dat there.' |
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| 91 | call abort_physic(subname,message,1) |
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| 92 | else |
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| 93 | do k=1,nS |
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| 94 | read(34,*) data_tmp |
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| 95 | abs_arrS(k,1:nT)=data_tmp(1:nT) |
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| 96 | end do |
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| 97 | endif |
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| 98 | close(34) |
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| 99 | |
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| 100 | ! foreign (N2+O2+Ar) broadening |
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| 101 | dt_file=TRIM(datadir)//'/continuum_data/H2O_CONT_FOREIGN.dat' |
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| 102 | open(35,file=dt_file,form='formatted',status='old',iostat=ios) |
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| 103 | if (ios.ne.0) then ! file not found |
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| 104 | write(*,*) 'Error from interpolateH2O_cont' |
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| 105 | write(*,*) 'Data file ',trim(dt_file),' not found.' |
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| 106 | write(*,*)'Check that your path to datagcm:',trim(datadir) |
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| 107 | write(*,*)' is correct. You can change it in callphys.def with:' |
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| 108 | write(*,*)' datadir = /absolute/path/to/datagcm' |
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| 109 | message=' Also check that there is a continuum_data/H2O_CONT_FOREIGN.dat there.' |
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| 110 | call abort_physic(subname,message,1) |
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| 111 | else |
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| 112 | do k=1,nS |
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| 113 | read(35,*) data_tmp |
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| 114 | abs_arrF(k,1:nT)=data_tmp(1:nT) |
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| 115 | end do |
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| 116 | endif |
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| 117 | close(35) |
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| 118 | |
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| 119 | temp_arr(1) = 200. |
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| 120 | temp_arr(2) = 250. |
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| 121 | temp_arr(3) = 300. |
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| 122 | temp_arr(4) = 350. |
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| 123 | temp_arr(5) = 400. |
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| 124 | temp_arr(6) = 450. |
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| 125 | temp_arr(7) = 500. |
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| 126 | temp_arr(8) = 550. |
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| 127 | temp_arr(9) = 600. |
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| 128 | temp_arr(10) = 650. |
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| 129 | temp_arr(11) = 700. |
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| 130 | |
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| 131 | print*,'interpolateH2Ocont: At wavenumber ',wn,' cm^-1' |
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| 132 | print*,' temperature ',temp,' K' |
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| 133 | print*,' H2O pressure ',presS,' Pa' |
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| 134 | print*,' air pressure ',presF,' Pa' |
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| 135 | !$OMP END MASTER |
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| 136 | !$OMP BARRIER |
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| 137 | |
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| 138 | endif |
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| 139 | |
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| 140 | call bilinearbig(nS,nT,wn_arr,temp_arr,abs_arrS,wn,temp,abcoefS,ind) |
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| 141 | ! print*,'the self absorption is ',abcoefS,' cm^2 molecule^-1' |
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| 142 | |
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| 143 | call bilinearbig(nS,nT,wn_arr,temp_arr,abs_arrF,wn,temp,abcoefF,ind) |
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| 144 | ! print*,'the foreign absorption is ',abcoefF,' cm^2 molecule^-1' |
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| 145 | |
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| 146 | ! print*,'We have ',amagatS,' amagats of H2O vapour' |
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| 147 | ! print*,'and ',amagatF,' amagats of air' |
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| 148 | |
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| 149 | abcoef = abcoefS*amagatS + abcoefF*amagatF ! Eq. (15) in Clough (1989) |
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| 150 | abcoef = abcoef*(presS/(presF+presS)) ! take H2O mixing ratio into account |
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| 151 | ! abs coeffs are given per molecule of H2O |
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| 152 | |
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| 153 | Nmolec = (presS+presF)/(kB*temp) ! assume ideal gas |
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| 154 | ! print*,'Total number of molecules per m^3 is',Nmolec |
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| 155 | |
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| 156 | abcoef = abcoef*Nmolec/(100.0**2) ! convert to m^-1 |
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| 157 | ! print*,'So the total absorption is ',abcoef,' m^-1' |
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| 158 | ! print*,'And optical depth / km : ',1000.0*abcoef |
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| 159 | |
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| 160 | |
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| 161 | if(wn.gt.500 .and. wn.lt.1400)then |
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| 162 | elseif(wn.gt.2100 .and. wn.lt.3000)then |
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| 163 | else |
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| 164 | abcoef = 0.0 |
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| 165 | endif |
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| 166 | |
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| 167 | ! unlike for Rayleigh scattering, we do not currently weight by the BB function |
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| 168 | ! however our bands are normally thin, so this is no big deal. |
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| 169 | |
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| 170 | |
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| 171 | return |
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| 172 | end subroutine interpolateH2Ocont_CKD |
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| 173 | |
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