| 1 | subroutine soil_settings(nid,ngrid,nsoil,tsurf,tsoil,indextime) |
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| 2 | |
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| 3 | ! use netcdf |
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| 4 | use comsoil_h, only: layer, mlayer, inertiedat, volcapa |
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| 5 | use iostart, only: inquire_field_ndims, get_var, get_field, |
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| 6 | & inquire_field, inquire_dimension_length |
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| 7 | implicit none |
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| 8 | |
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| 9 | !====================================================================== |
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| 10 | ! Author: Ehouarn Millour (07/2006) |
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| 11 | ! |
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| 12 | ! Purpose: Read and/or initialise soil depths and properties |
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| 13 | ! |
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| 14 | ! Modifications: Aug.2010 EM : use NetCDF90 to load variables (enables using |
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| 15 | ! r4 or r8 restarts independently of having compiled |
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| 16 | ! the GCM in r4 or r8) |
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| 17 | ! June 2013 TN : Possibility to read files with a time axis |
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| 18 | ! |
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| 19 | ! |
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| 20 | ! This subroutine reads from a NetCDF file (opened by the caller) |
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| 21 | ! of "startfi.nc" format. |
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| 22 | ! The various actions and variable read/initialized are: |
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| 23 | ! 1. Check out the number of soil layers (in datafile); if it isn't equal |
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| 24 | ! to nsoil, then some interpolation will be required |
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| 25 | ! Also check if data in file "startfi.nc" is in older format (ie: |
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| 26 | ! thermal inertia was depth-independent; and there was no "depth" |
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| 27 | ! coordinate. |
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| 28 | ! Read/build layer (and midlayer) depths |
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| 29 | ! 2. Read volumetric specific heat (or initialise it to default value) |
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| 30 | ! 3. Read Thermal inertia |
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| 31 | ! 4. Read soil temperatures |
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| 32 | ! 5. Interpolate thermal inertia and temperature on the new grid, if |
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| 33 | ! necessary |
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| 34 | !====================================================================== |
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| 35 | |
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| 36 | !====================================================================== |
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| 37 | ! arguments |
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| 38 | ! --------- |
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| 39 | ! inputs: |
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| 40 | integer,intent(in) :: nid ! Input Netcdf file ID |
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| 41 | integer,intent(in) :: ngrid ! # of horizontal grid points |
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| 42 | integer,intent(in) :: nsoil ! # of soil layers |
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| 43 | real,intent(in) :: tsurf(ngrid) ! surface temperature |
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| 44 | integer,intent(in) :: indextime ! position on time axis |
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| 45 | ! output: |
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| 46 | real,intent(out) :: tsoil(ngrid,nsoil) ! soil temperature |
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| 47 | |
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| 48 | !====================================================================== |
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| 49 | ! local variables: |
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| 50 | integer ierr ! status (returned by NetCDF functions) |
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| 51 | integer nvarid ! ID of NetCDF variable |
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| 52 | integer dimid ! ID of NetCDF dimension |
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| 53 | integer dimlen ! length along the "depth" dimension |
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| 54 | integer ndims ! # of dimensions of read <inertiedat> data |
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| 55 | integer ig,iloop ! loop counters |
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| 56 | |
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| 57 | integer edges(3),corner(3) ! to read a specific time |
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| 58 | |
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| 59 | logical :: olddepthdef=.false. ! flag |
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| 60 | logical :: interpol=.false. ! flag: true if interpolation will be requiered |
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| 61 | |
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| 62 | ! to store "old" values |
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| 63 | real,dimension(:),allocatable :: surfinertia !surface thermal inertia |
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| 64 | real,dimension(:),allocatable :: oldmlayer |
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| 65 | real,dimension(:,:),allocatable :: oldinertiedat |
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| 66 | real,dimension(:,:),allocatable :: oldtsoil |
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| 67 | |
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| 68 | ! for interpolation |
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| 69 | real,dimension(:),allocatable :: oldgrid |
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| 70 | real,dimension(:),allocatable :: oldval |
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| 71 | real,dimension(:),allocatable :: newval |
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| 72 | |
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| 73 | real alpha,lay1 ! coefficients for building layers |
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| 74 | real xmin,xmax ! to display min and max of a field |
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| 75 | |
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| 76 | real,parameter :: default_volcapa=1.e6 |
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| 77 | |
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| 78 | logical :: found,ok |
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| 79 | |
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| 80 | !====================================================================== |
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| 81 | |
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| 82 | ! 1. Depth coordinate |
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| 83 | ! ------------------- |
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| 84 | |
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| 85 | ! 1.1 Start by reading how many layers of soil there are |
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| 86 | |
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| 87 | ! ierr=nf90_inq_dimid(nid,"subsurface_layers",dimid) |
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| 88 | ! if (ierr.ne.nf90_noerr) then |
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| 89 | ! write(*,*)'soil_settings: Problem reading <subsurface_layers>' |
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| 90 | ! write(*,*)trim(nf90_strerror(ierr)) |
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| 91 | ! call abort |
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| 92 | ! endif |
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| 93 | |
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| 94 | ! ierr=nf90_inquire_dimension(nid,dimid,len=dimlen) |
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| 95 | ! if (ierr.ne.nf90_noerr) then |
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| 96 | ! write(*,*)'soil_settings: Problem getting <subsurface_layers>', |
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| 97 | ! & 'length' |
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| 98 | ! write(*,*)trim(nf90_strerror(ierr)) |
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| 99 | ! call abort |
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| 100 | ! endif |
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| 101 | dimlen=inquire_dimension_length("subsurface_layers") |
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| 102 | |
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| 103 | if (dimlen.ne.nsoil) then |
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| 104 | write(*,*)'soil_settings: Interpolation of soil temperature ', |
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| 105 | & 'and thermal inertia will be required!' |
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| 106 | ! if dimlen doesn't match nsoil, then interpolation of |
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| 107 | ! soil temperatures and thermal inertia will be requiered |
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| 108 | interpol=.true. |
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| 109 | ! allocate oldmlayer |
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| 110 | if (.not.allocated(oldmlayer)) then |
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| 111 | allocate(oldmlayer(dimlen),stat=ierr) |
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| 112 | if (ierr.ne.0) then |
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| 113 | write(*,*) 'soil_settings: failed allocation of oldmlayer!' |
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| 114 | call abort_physic("soil_settings", |
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| 115 | & "failed oldmlayer allocation",1) |
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| 116 | endif |
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| 117 | endif |
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| 118 | endif |
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| 119 | |
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| 120 | ! 1.2 Find out the # of dimensions <inertiedat> was defined as using |
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| 121 | ! (in ye old days, thermal inertia was only given at the "surface") |
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| 122 | ! Look for thermal inertia data |
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| 123 | ! ierr=nf90_inq_varid(nid,"inertiedat",nvarid) |
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| 124 | ! if (ierr.NE.nf90_noerr) then |
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| 125 | ! write(*,*)'soil_settings: Field <inertiedat> not found!' |
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| 126 | ! write(*,*)trim(nf90_strerror(ierr)) |
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| 127 | ! call abort |
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| 128 | ! endif |
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| 129 | ! |
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| 130 | ! ! Read the # of dimensions <inertidat> was defined as using |
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| 131 | ! ierr=nf90_inquire_variable(nid,nvarid,ndims=ndims) |
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| 132 | ! ! if (ndims.eq.1) then we have the "old 2D-surface" format |
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| 133 | ndims=inquire_field_ndims("inertiedat") |
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| 134 | |
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| 135 | ! 1.3 Read depths values or set olddepthdef flag and values |
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| 136 | if (ndims.eq.1) then ! we know that there is none |
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| 137 | write(*,*)'soil_settings: no <soildepth> field expected' |
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| 138 | write(*,*)'building one mimicking old definitions' |
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| 139 | olddepthdef=.true. |
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| 140 | interpol=.true. |
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| 141 | |
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| 142 | do iloop=1,dimlen |
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| 143 | oldmlayer(iloop)=sqrt(887.75/3.14)*((2.**(iloop-0.5))-1.) |
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| 144 | enddo |
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| 145 | else ! Look for depth |
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| 146 | ! ierr=nf90_inq_varid(nid,"soildepth",nvarid) |
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| 147 | ! if (ierr.ne.nf90_noerr) then |
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| 148 | ! write(*,*)'soil_settings: Field <soildepth> not found!' |
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| 149 | ! write(*,*)trim(nf90_strerror(ierr)) |
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| 150 | ! call abort |
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| 151 | ! endif |
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| 152 | ! read <depth> coordinate |
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| 153 | if (interpol) then !put values in oldmlayer |
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| 154 | ! ierr=nf90_get_var(nid,nvarid,oldmlayer) |
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| 155 | ! if (ierr.ne.nf90_noerr) then |
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| 156 | ! write(*,*)'soil_settings: Problem while reading <soildepth>' |
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| 157 | ! write(*,*)trim(nf90_strerror(ierr)) |
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| 158 | ! call abort |
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| 159 | ! endif |
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| 160 | call get_var("soildepth",oldmlayer,found) |
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| 161 | if (.not.found) then |
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| 162 | write(*,*)'soil_settings: Problem while reading <soildepth>' |
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| 163 | endif |
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| 164 | else ! put values in mlayer |
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| 165 | ! ierr=nf90_get_var(nid,nvarid,mlayer) |
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| 166 | ! if (ierr.ne.nf90_noerr) then |
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| 167 | ! write(*,*)'soil_settings: Problem while reading <soildepth>' |
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| 168 | ! write(*,*)trim(nf90_strerror(ierr)) |
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| 169 | ! call abort |
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| 170 | ! endif |
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| 171 | call get_var("soildepth",mlayer,found) |
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| 172 | if (.not.found) then |
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| 173 | write(*,*)'soil_settings: Problem while reading <soildepth>' |
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| 174 | endif |
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| 175 | endif !of if (interpol) |
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| 176 | endif !of if (ndims.eq.1) |
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| 177 | |
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| 178 | ! 1.4 Build mlayer(), if necessary |
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| 179 | if (interpol) then |
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| 180 | ! default mlayer distribution, following a power law: |
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| 181 | ! mlayer(k)=lay1*alpha**(k-1/2) |
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| 182 | lay1=2.e-4 |
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| 183 | alpha=2 |
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| 184 | do iloop=0,nsoil-1 |
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| 185 | mlayer(iloop)=lay1*(alpha**(iloop-0.5)) |
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| 186 | enddo |
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| 187 | endif |
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| 188 | |
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| 189 | ! 1.5 Build layer(); following the same law as mlayer() |
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| 190 | ! Assuming layer distribution follows mid-layer law: |
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| 191 | ! layer(k)=lay1*alpha**(k-1) |
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| 192 | lay1=sqrt(mlayer(0)*mlayer(1)) |
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| 193 | alpha=mlayer(1)/mlayer(0) |
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| 194 | do iloop=1,nsoil |
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| 195 | layer(iloop)=lay1*(alpha**(iloop-1)) |
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| 196 | enddo |
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| 197 | |
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| 198 | ! 2. Volumetric heat capacity (note: it is declared in comsoil_h) |
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| 199 | ! --------------------------- |
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| 200 | ! "volcapa" is (so far) 0D and written in "controle" table of startfi file |
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| 201 | ! volcapa is read or set when "controle" is read (see tabfi.F) |
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| 202 | ! Just in case, we check here that it is not zero. If it is, we |
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| 203 | ! set it to "default_volcapa" |
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| 204 | |
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| 205 | if (volcapa.le.0.0) then |
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| 206 | write(*,*)'soil_settings: Warning, volcapa = ',volcapa |
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| 207 | write(*,*)' That doesn t seem right' |
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| 208 | write(*,*)' Initializing Volumetric heat capacity to ', |
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| 209 | & default_volcapa |
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| 210 | volcapa=default_volcapa |
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| 211 | endif |
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| 212 | ! Look for it |
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| 213 | ! ierr=NF_INQ_VARID(nid,"volcapa",nvarid) |
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| 214 | ! if (ierr.NE.nf90_noerr) then |
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| 215 | ! write(*,*)'soil_settings: Field <volcapa> not found!' |
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| 216 | ! write(*,*)'Initializing Volumetric heat capacity to ', |
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| 217 | ! & default_volcapa |
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| 218 | ! volcapa=default_volcapa |
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| 219 | ! else |
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| 220 | !#ifdef NC_DOUBLE |
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| 221 | ! ierr = NF_GET_VAR_DOUBLE(nid,nvarid,volcapa) |
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| 222 | !#else |
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| 223 | ! ierr = NF_GET_VAR_REAL(nid,nvarid,volcapa) |
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| 224 | !#endif |
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| 225 | ! if (ierr.ne.nf90_noerr) then |
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| 226 | ! write(*,*)'soil_settings: Problem while reading <volcapa>' |
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| 227 | ! call abort |
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| 228 | ! endif |
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| 229 | ! endif |
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| 230 | |
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| 231 | ! 3. Thermal inertia (note: it is declared in comsoil_h) |
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| 232 | ! ------------------ |
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| 233 | |
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| 234 | ! 3.1 Look (again) for thermal inertia data (to reset nvarid) |
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| 235 | ! ierr=nf90_inq_varid(nid,"inertiedat",nvarid) |
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| 236 | ! if (ierr.NE.nf90_noerr) then |
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| 237 | ! write(*,*)'soil_settings: Field <inertiedat> not found!' |
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| 238 | ! write(*,*)trim(nf90_strerror(ierr)) |
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| 239 | ! call abort |
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| 240 | ! endif |
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| 241 | |
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| 242 | ! 3.2 Knowing the # of dimensions <inertidat> was defined as using, |
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| 243 | ! read/build thermal inertia |
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| 244 | |
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| 245 | if (ndims.eq.1) then ! "old 2D-surface" format |
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| 246 | write(*,*)'soil_settings: Thermal inertia is only given as surfac |
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| 247 | &e data!' |
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| 248 | ! Read Surface thermal inertia |
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| 249 | allocate(surfinertia(ngrid)) |
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| 250 | ! ierr=nf90_get_var(nid,nvarid,surfinertia) |
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| 251 | ! if (ierr.NE.nf90_noerr) then |
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| 252 | ! write(*,*)'soil_settings: Problem while reading <inertiedat>' |
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| 253 | ! write(*,*)trim(nf90_strerror(ierr)) |
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| 254 | ! call abort |
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| 255 | ! endif |
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| 256 | call get_field("inertiedat",surfinertia,found) |
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| 257 | if (.not.found) then |
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| 258 | write(*,*) "soil_settings: Failed loading <inertiedat>" |
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| 259 | call abort_physic("soil_settings", |
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| 260 | & "failed loading <inertiedat>",1) |
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| 261 | endif |
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| 262 | |
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| 263 | write(*,*)' => Building soil thermal inertia (using reference sur |
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| 264 | &face thermal inertia)' |
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| 265 | do iloop=1,nsoil |
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| 266 | inertiedat(:,iloop)=surfinertia(:) |
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| 267 | enddo |
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| 268 | deallocate(surfinertia) |
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| 269 | |
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| 270 | else ! "3D surface+depth" format |
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| 271 | if (interpol) then ! put values in oldinertiedat |
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| 272 | if (.not.allocated(oldinertiedat)) then |
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| 273 | allocate(oldinertiedat(ngrid,dimlen),stat=ierr) |
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| 274 | if (ierr.ne.0) then |
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| 275 | write(*,*) 'soil_settings: failed allocation of ', |
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| 276 | & 'oldinertiedat!' |
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| 277 | call abort_physic("soil_settings", |
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| 278 | & "failed allocation of oldinertiedat",1) |
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| 279 | endif |
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| 280 | endif ! of if (.not.allocated(oldinertiedat)) |
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| 281 | ! ierr=nf90_get_var(nid,nvarid,oldinertiedat) |
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| 282 | ! if (ierr.NE.nf90_noerr) then |
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| 283 | ! write(*,*)'soil_settings: Problem while reading <inertiedat>' |
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| 284 | ! write(*,*)trim(nf90_strerror(ierr)) |
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| 285 | ! call abort |
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| 286 | ! endif |
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| 287 | call get_field("inertiedat",oldinertiedat,found) |
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| 288 | if (.not.found) then |
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| 289 | write(*,*) "soil_settings: Failed loading <inertiedat>" |
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| 290 | call abort_physic("soil_settings", |
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| 291 | & "failed loading <inertiedat>",1) |
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| 292 | endif |
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| 293 | else ! put values in therm_i |
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| 294 | ! ierr=nf90_get_var(nid,nvarid,inertiedat) |
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| 295 | ! if (ierr.NE.nf90_noerr) then |
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| 296 | ! write(*,*)'soil_settings: Problem while reading <inertiedat>' |
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| 297 | ! write(*,*)trim(nf90_strerror(ierr)) |
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| 298 | ! call abort |
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| 299 | call get_field("inertiedat",inertiedat,found) |
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| 300 | if (.not.found) then |
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| 301 | write(*,*) "soil_settings: Failed loading <inertiedat>" |
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| 302 | call abort_physic("soil_settings", |
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| 303 | & "failed loading <inertiedat>",1) |
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| 304 | endif |
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| 305 | ! endif |
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| 306 | endif ! of if (interpol) |
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| 307 | endif ! of if (ndims.eq.1) |
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| 308 | |
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| 309 | ! 4. Read soil temperatures |
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| 310 | ! ------------------------- |
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| 311 | |
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| 312 | ! ierr=nf90_inq_varid(nid,"tsoil",nvarid) |
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| 313 | ok=inquire_field("tsoil") |
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| 314 | ! if (ierr.ne.nf90_noerr) then |
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| 315 | if (.not.ok) then |
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| 316 | write(*,*)'soil_settings: Field <tsoil> not found!' |
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| 317 | write(*,*)' => Building <tsoil> from surface values <tsurf>' |
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| 318 | do iloop=1,nsoil |
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| 319 | tsoil(:,iloop)=tsurf(:) |
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| 320 | enddo |
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| 321 | else ! <tsoil> found |
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| 322 | if (interpol) then ! put values in oldtsoil |
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| 323 | if (.not.allocated(oldtsoil)) then |
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| 324 | allocate(oldtsoil(ngrid,dimlen),stat=ierr) |
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| 325 | if (ierr.ne.0) then |
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| 326 | write(*,*) 'soil_settings: failed allocation of ', |
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| 327 | & 'oldtsoil!' |
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| 328 | call abort_physic("soil_settings", |
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| 329 | & "failed allocation of oldtsoil",1) |
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| 330 | endif |
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| 331 | endif |
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| 332 | ! ierr=nf90_get_var(nid,nvarid,oldtsoil) |
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| 333 | ! if (ierr.ne.nf90_noerr) then |
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| 334 | ! write(*,*)'soil_settings: Problem while reading <tsoil>' |
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| 335 | ! write(*,*)trim(nf90_strerror(ierr)) |
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| 336 | ! call abort |
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| 337 | ! endif |
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| 338 | call get_field("tsoil",oldtsoil,found) |
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| 339 | if (.not.found) then |
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| 340 | write(*,*) "soil_settings: Failed loading <tsoil>" |
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| 341 | call abort_physic("soil_settings", |
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| 342 | & "failed loading <tsoil>",1) |
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| 343 | endif |
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| 344 | else ! put values in tsoil |
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| 345 | ! corner(1)=1 |
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| 346 | ! corner(2)=1 |
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| 347 | ! corner(3)=indextime |
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| 348 | ! edges(1)=ngrid |
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| 349 | ! edges(2)=nsoil |
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| 350 | ! edges(3)=1 |
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| 351 | ! !ierr=nf90_get_var(nid,nvarid,tsoil,corner,edges) |
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| 352 | ! ierr=nf90_get_var(nid,nvarid,tsoil) |
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| 353 | ! if (ierr.ne.nf90_noerr) then |
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| 354 | ! write(*,*)'soil_settings: Problem while reading <tsoil>' |
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| 355 | ! write(*,*)trim(nf90_strerror(ierr)) |
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| 356 | ! call abort |
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| 357 | ! endif |
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| 358 | call get_field("tsoil",tsoil,found,timeindex=indextime) |
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| 359 | if (.not.found) then |
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| 360 | write(*,*) "soil_settings: Failed loading <tsoil>" |
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| 361 | call abort_physic("soil_settings", |
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| 362 | & "failed loading <tsoil>",1) |
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| 363 | endif |
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| 364 | endif ! of if (interpol) |
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| 365 | endif! of if (.not.ok) |
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| 366 | |
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| 367 | ! 5. If necessary, interpolate soil temperatures and thermal inertias |
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| 368 | ! ------------------------------------------------------------------- |
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| 369 | |
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| 370 | if (olddepthdef) then |
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| 371 | ! tsoil needs to be interpolated, but not therm_i |
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| 372 | allocate(oldgrid(dimlen+1)) |
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| 373 | allocate(oldval(dimlen+1)) |
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| 374 | allocate(newval(nsoil)) |
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| 375 | |
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| 376 | do ig=1,ngrid |
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| 377 | ! copy values |
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| 378 | oldval(1)=tsurf(ig) |
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| 379 | oldval(2:dimlen+1)=oldtsoil(ig,1:dimlen) |
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| 380 | ! build vertical coordinate |
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| 381 | oldgrid(1)=0. ! ground |
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| 382 | oldgrid(2:dimlen+1)=oldmlayer(1:dimlen)* |
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| 383 | & (inertiedat(ig,1)/volcapa) |
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| 384 | ! interpolate |
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| 385 | call interp_line(oldgrid,oldval,dimlen+1,mlayer,newval,nsoil) |
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| 386 | ! copy result in tsoil |
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| 387 | tsoil(ig,:)=newval(:) |
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| 388 | enddo |
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| 389 | |
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| 390 | ! cleanup |
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| 391 | deallocate(oldgrid) |
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| 392 | deallocate(oldval) |
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| 393 | deallocate(newval) |
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| 394 | interpol=.false. ! no need for interpolation any more |
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| 395 | endif !of if (olddepthdef) |
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| 396 | |
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| 397 | if (interpol) then |
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| 398 | write(*,*)'soil_settings: Vertical interpolation along new grid' |
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| 399 | ! interpolate soil temperatures and thermal inertias |
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| 400 | if (.not.allocated(oldgrid)) then |
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| 401 | allocate(oldgrid(dimlen+1)) |
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| 402 | allocate(oldval(dimlen+1)) |
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| 403 | allocate(newval(nsoil)) |
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| 404 | endif |
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| 405 | |
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| 406 | ! thermal inertia |
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| 407 | do ig=1,ngrid |
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| 408 | ! copy data |
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| 409 | oldval(1:dimlen)=oldinertiedat(ig,dimlen) |
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| 410 | ! interpolate |
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| 411 | call interp_line(oldmlayer,oldval,dimlen,mlayer,newval,nsoil) |
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| 412 | !copy result in inertiedat |
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| 413 | inertiedat(ig,:)=newval(:) |
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| 414 | enddo |
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| 415 | |
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| 416 | ! soil temperature |
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| 417 | ! vertical coordinate |
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| 418 | oldgrid(1)=0.0 |
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| 419 | oldgrid(2:dimlen+1)=oldmlayer(1:dimlen) |
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| 420 | do ig=1,ngrid |
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| 421 | ! data |
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| 422 | oldval(1)=tsurf(ig) |
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| 423 | oldval(2:dimlen+1)=oldtsoil(ig,1:dimlen) |
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| 424 | ! interpolate |
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| 425 | call interp_line(oldgrid,oldval,dimlen+1,mlayer,newval,nsoil) |
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| 426 | ! copy result in inertiedat |
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| 427 | tsoil(ig,:)=newval(:) |
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| 428 | enddo |
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| 429 | |
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| 430 | !cleanup |
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| 431 | deallocate(oldgrid) |
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| 432 | deallocate(oldval) |
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| 433 | deallocate(newval) |
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| 434 | deallocate(oldinertiedat) |
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| 435 | deallocate(oldtsoil) |
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| 436 | endif ! of if (interpol) |
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| 437 | |
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| 438 | ! 6. Report min and max values of soil temperatures and thermal inertias |
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| 439 | ! ---------------------------------------------------------------------- |
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| 440 | |
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| 441 | write(*,*) |
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| 442 | write(*,*)'Soil volumetric heat capacity:',volcapa |
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| 443 | |
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| 444 | xmin = MINVAL(inertiedat) |
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| 445 | xmax = MAXVAL(inertiedat) |
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| 446 | write(*,*)'Soil thermal inertia <inertiedat>:',xmin,xmax |
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| 447 | |
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| 448 | xmin = 1.0E+20 |
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| 449 | xmax = -1.0E+20 |
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| 450 | xmin = MINVAL(tsoil) |
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| 451 | xmax = MAXVAL(tsoil) |
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| 452 | write(*,*)'Soil temperature <tsoil>:',xmin,xmax |
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| 453 | |
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| 454 | end |
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