| 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 | ! for interpolation |
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| 68 | real,dimension(:),allocatable :: oldgrid |
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| 69 | real,dimension(:),allocatable :: oldval |
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| 70 | real,dimension(:),allocatable :: newval |
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| 71 | |
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| 72 | real alpha,lay1 ! coefficients for building layers |
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| 73 | real xmin,xmax ! to display min and max of a field |
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| 74 | |
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| 75 | real,parameter :: default_volcapa=1.e6 |
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| 76 | |
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| 77 | logical :: found,ok |
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| 78 | !====================================================================== |
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| 79 | ! 1. Depth coordinate |
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| 80 | ! ------------------- |
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| 81 | ! 1.1 Start by reading how many layers of soil there are |
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| 82 | dimlen=inquire_dimension_length("subsurface_layers") |
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| 83 | |
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| 84 | if (dimlen.ne.nsoil) then |
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| 85 | write(*,*)'soil_settings: Interpolation of soil temperature ', |
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| 86 | & 'and thermal inertia will be required!' |
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| 87 | ! if dimlen doesn't match nsoil, then interpolation of |
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| 88 | ! soil temperatures and thermal inertia will be requiered |
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| 89 | interpol=.true. |
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| 90 | ! allocate olmlayer |
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| 91 | allocate(oldmlayer(dimlen),stat=ierr) |
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| 92 | if (ierr.ne.0) then |
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| 93 | write(*,*) 'soil_settings: failed allocation of oldmlayer!' |
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| 94 | stop |
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| 95 | endif |
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| 96 | endif |
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| 97 | ! 1.2 Find out the # of dimensions <inertiedat> was defined as using |
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| 98 | ndims=inquire_field_ndims("inertiedat") |
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| 99 | ! 1.3 Read depths values or set olddepthdef flag and values |
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| 100 | if (ndims.eq.1) then ! we know that there is none |
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| 101 | write(*,*)'soil_settings: no <soildepth> field expected' |
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| 102 | write(*,*)'building one mimicking old definitions' |
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| 103 | olddepthdef=.true. |
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| 104 | interpol=.true. |
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| 105 | ! allocate oldmlayer |
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| 106 | if (.not.allocated(oldmlayer)) then |
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| 107 | allocate(oldmlayer(dimlen),stat=ierr) |
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| 108 | if (ierr.ne.0) then |
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| 109 | write(*,*) 'soil_settings: failed allocation of oldmlayer!' |
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| 110 | stop |
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| 111 | endif |
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| 112 | endif |
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| 113 | do iloop=1,dimlen |
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| 114 | oldmlayer(iloop)=sqrt(887.75/3.14)*((2.**(iloop-0.5))-1.) |
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| 115 | enddo |
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| 116 | else ! Look for depth |
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| 117 | ! read <depth> coordinate |
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| 118 | if (interpol) then !put values in oldmlayer |
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| 119 | call get_var("soildepth",oldmlayer,found) |
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| 120 | if (.not.found) then |
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| 121 | write(*,*)'soil_settings: Problem while reading <soildepth>' |
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| 122 | endif |
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| 123 | else ! put values in mlayer |
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| 124 | call get_var("soildepth",mlayer,found) |
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| 125 | print*,"mlayer",mlayer |
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| 126 | if (.not.found) then |
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| 127 | write(*,*)'soil_settings: Problem while reading <soildepth>' |
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| 128 | endif |
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| 129 | endif !of if (interpol) |
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| 130 | endif !of if (ndims.eq.1) |
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| 131 | ! 1.4 Build mlayer(), if necessary |
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| 132 | if (interpol) then |
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| 133 | ! default mlayer distribution, following a power law: |
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| 134 | ! mlayer(k)=lay1*alpha**(k-1/2) |
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| 135 | lay1=2.e-4 |
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| 136 | alpha=2 |
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| 137 | do iloop=0,nsoil-1 |
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| 138 | mlayer(iloop)=lay1*(alpha**(iloop-0.5)) |
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| 139 | enddo |
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| 140 | endif |
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| 141 | ! 1.5 Build layer(); following the same law as mlayer() |
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| 142 | ! Assuming layer distribution follows mid-layer law: |
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| 143 | ! layer(k)=lay1*alpha**(k-1) |
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| 144 | lay1=sqrt(mlayer(0)*mlayer(1)) |
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| 145 | alpha=mlayer(1)/mlayer(0) |
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| 146 | do iloop=1,nsoil |
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| 147 | layer(iloop)=lay1*(alpha**(iloop-1)) |
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| 148 | enddo |
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| 149 | ! 2. Volumetric heat capacity (note: it is declared in comsoil_h) |
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| 150 | ! --------------------------- |
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| 151 | ! "volcapa" is (so far) 0D and written in "controle" table of startfi file |
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| 152 | ! volcapa is read or set when "controle" is read (see tabfi.F) |
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| 153 | ! Just in case, we check here that it is not zero. If it is, we |
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| 154 | ! set it to "default_volcapa" |
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| 155 | |
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| 156 | if (volcapa.le.0.0) then |
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| 157 | write(*,*)'soil_settings: Warning, volcapa = ',volcapa |
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| 158 | write(*,*)' That doesn t seem right' |
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| 159 | write(*,*)' Initializing Volumetric heat capacity to ', |
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| 160 | & default_volcapa |
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| 161 | volcapa=default_volcapa |
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| 162 | endif |
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| 163 | |
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| 164 | ! 3. Thermal inertia (note: it is declared in comsoil_h) |
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| 165 | ! ------------------ |
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| 166 | ! 3.1 Look (again) for thermal inertia data (to reset nvarid) |
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| 167 | |
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| 168 | ! 3.2 Knowing the # of dimensions <inertidat> was defined as using, |
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| 169 | ! read/build thermal inertia |
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| 170 | |
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| 171 | if (ndims.eq.1) then ! "old 2D-surface" format |
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| 172 | write(*,*)'soil_settings: Thermal inertia is only given as surfac |
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| 173 | &e data!' |
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| 174 | ! Read Surface thermal inertia |
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| 175 | allocate(surfinertia(ngrid)) |
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| 176 | call get_field("inertiedat",surfinertia,found) |
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| 177 | if (.not.found) then |
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| 178 | write(*,*) "soil_settings: Failed loading <inertiedat>" |
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| 179 | call abort |
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| 180 | endif |
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| 181 | |
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| 182 | write(*,*)' => Building soil thermal inertia (using reference sur |
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| 183 | &face thermal inertia)' |
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| 184 | do iloop=1,nsoil |
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| 185 | inertiedat(:,iloop)=surfinertia(:) |
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| 186 | enddo |
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| 187 | deallocate(surfinertia) |
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| 188 | |
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| 189 | else ! "3D surface+depth" format |
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| 190 | if (interpol) then ! put values in oldinertiedat |
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| 191 | if (.not.allocated(oldinertiedat)) then |
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| 192 | allocate(oldinertiedat(ngrid,dimlen),stat=ierr) |
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| 193 | if (ierr.ne.0) then |
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| 194 | write(*,*) 'soil_settings: failed allocation of ', |
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| 195 | & 'oldinertiedat!' |
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| 196 | stop |
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| 197 | endif |
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| 198 | endif ! of if (.not.allocated(oldinertiedat)) |
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| 199 | call get_field("inertiedat",oldinertiedat,found) |
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| 200 | if (.not.found) then |
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| 201 | write(*,*) "soil_settings: Failed loading <inertiedat>" |
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| 202 | call abort |
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| 203 | endif |
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| 204 | else ! put values in therm_i |
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| 205 | call get_field("inertiedat",inertiedat,found) |
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| 206 | if (.not.found) then |
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| 207 | write(*,*) "soil_settings: Failed loading <inertiedat>" |
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| 208 | call abort |
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| 209 | endif |
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| 210 | ! endif |
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| 211 | endif ! of if (interpol) |
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| 212 | endif ! of if (ndims.eq.1) |
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| 213 | |
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| 214 | ! 4. Read soil temperatures |
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| 215 | ! ------------------------- |
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| 216 | ! ierr=nf90_inq_varid(nid,"tsoil",nvarid) |
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| 217 | ok=inquire_field("tsoil") |
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| 218 | ! if (ierr.ne.nf90_noerr) then |
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| 219 | if (.not.ok) then |
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| 220 | write(*,*)'soil_settings: Field <tsoil> not found!' |
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| 221 | write(*,*)' => Building <tsoil> from surface values <tsurf>' |
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| 222 | do iloop=1,nsoil |
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| 223 | tsoil(:,iloop)=tsurf(:) |
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| 224 | enddo |
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| 225 | else ! <tsoil> found |
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| 226 | if (interpol) then ! put values in oldtsoil |
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| 227 | if (.not.allocated(oldtsoil)) then |
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| 228 | allocate(oldtsoil(ngrid,dimlen),stat=ierr) |
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| 229 | if (ierr.ne.0) then |
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| 230 | write(*,*) 'soil_settings: failed allocation of ', |
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| 231 | & 'oldtsoil!' |
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| 232 | stop |
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| 233 | endif |
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| 234 | endif |
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| 235 | call get_field("tsoil",oldtsoil,found) |
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| 236 | if (.not.found) then |
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| 237 | write(*,*) "soil_settings: Failed loading <tsoil>" |
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| 238 | call abort |
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| 239 | endif |
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| 240 | else ! put values in tsoil |
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| 241 | call get_field("tsoil",tsoil,found,timeindex=indextime) |
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| 242 | if (.not.found) then |
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| 243 | write(*,*) "soil_settings: Failed loading <tsoil>" |
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| 244 | call abort |
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| 245 | endif |
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| 246 | endif ! of if (interpol) |
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| 247 | endif! of if (.not.ok) |
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| 248 | |
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| 249 | ! 5. If necessary, interpolate soil temperatures and thermal inertias |
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| 250 | ! ------------------------------------------------------------------- |
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| 251 | if (olddepthdef) then |
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| 252 | ! tsoil needs to be interpolated, but not therm_i |
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| 253 | allocate(oldgrid(dimlen+1)) |
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| 254 | allocate(oldval(dimlen+1)) |
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| 255 | allocate(newval(nsoil)) |
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| 256 | |
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| 257 | do ig=1,ngrid |
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| 258 | ! copy values |
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| 259 | oldval(1)=tsurf(ig) |
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| 260 | oldval(2:dimlen+1)=oldtsoil(ig,1:dimlen) |
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| 261 | ! build vertical coordinate |
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| 262 | oldgrid(1)=0. ! ground |
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| 263 | oldgrid(2:dimlen+1)=oldmlayer(1:dimlen)* |
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| 264 | & (inertiedat(ig,1)/volcapa) |
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| 265 | ! interpolate |
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| 266 | call interp_line(oldgrid,oldval,dimlen+1,mlayer,newval,nsoil) |
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| 267 | ! copy result in tsoil |
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| 268 | tsoil(ig,:)=newval(:) |
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| 269 | enddo |
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| 270 | |
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| 271 | ! cleanup |
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| 272 | deallocate(oldgrid) |
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| 273 | deallocate(oldval) |
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| 274 | deallocate(newval) |
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| 275 | interpol=.false. ! no need for interpolation any more |
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| 276 | endif !of if (olddepthdef) |
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| 277 | |
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| 278 | if (interpol) then |
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| 279 | write(*,*)'soil_settings: Vertical interpolation along new grid' |
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| 280 | ! interpolate soil temperatures and thermal inertias |
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| 281 | if (.not.allocated(oldgrid)) then |
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| 282 | allocate(oldgrid(dimlen+1)) |
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| 283 | allocate(oldval(dimlen+1)) |
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| 284 | allocate(newval(nsoil)) |
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| 285 | endif |
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| 286 | |
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| 287 | ! thermal inertia |
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| 288 | do ig=1,ngrid |
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| 289 | ! copy data |
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| 290 | oldval(1:dimlen)=oldinertiedat(ig,dimlen) |
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| 291 | ! interpolate |
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| 292 | call interp_line(oldmlayer,oldval,dimlen,mlayer,newval,nsoil) |
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| 293 | !copy result in inertiedat |
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| 294 | inertiedat(ig,:)=newval(:) |
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| 295 | enddo |
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| 296 | |
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| 297 | ! soil temperature |
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| 298 | ! vertical coordinate |
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| 299 | oldgrid(1)=0.0 |
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| 300 | oldgrid(2:dimlen+1)=oldmlayer(1:dimlen) |
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| 301 | do ig=1,ngrid |
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| 302 | ! data |
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| 303 | oldval(1)=tsurf(ig) |
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| 304 | oldval(2:dimlen+1)=oldtsoil(ig,1:dimlen) |
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| 305 | ! interpolate |
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| 306 | call interp_line(oldgrid,oldval,dimlen+1,mlayer,newval,nsoil) |
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| 307 | ! copy result in inertiedat |
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| 308 | tsoil(ig,:)=newval(:) |
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| 309 | enddo |
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| 310 | |
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| 311 | !cleanup |
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| 312 | deallocate(oldgrid) |
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| 313 | deallocate(oldval) |
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| 314 | deallocate(newval) |
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| 315 | deallocate(oldinertiedat) |
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| 316 | deallocate(oldtsoil) |
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| 317 | endif ! of if (interpol) |
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| 318 | |
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| 319 | ! 6. Report min and max values of soil temperatures and thermal inertias |
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| 320 | ! ---------------------------------------------------------------------- |
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| 321 | |
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| 322 | write(*,*) |
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| 323 | write(*,*)'Soil volumetric heat capacity:',volcapa |
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| 324 | |
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| 325 | xmin = MINVAL(inertiedat) |
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| 326 | xmax = MAXVAL(inertiedat) |
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| 327 | write(*,*)'Soil thermal inertia <inertiedat>:',xmin,xmax |
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| 328 | |
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| 329 | xmin = 1.0E+20 |
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| 330 | xmax = -1.0E+20 |
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| 331 | xmin = MINVAL(tsoil) |
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| 332 | xmax = MAXVAL(tsoil) |
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| 333 | write(*,*)'Soil temperature <tsoil>:',xmin,xmax |
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| 334 | end |
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