| 1 | subroutine assignland |
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| 2 | |
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| 3 | !***************************************************************************** |
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| 4 | ! * |
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| 5 | ! This routine assigns fractions of the 13 landuse classes to each ECMWF * |
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| 6 | ! grid point. * |
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| 7 | ! The landuse inventory of * |
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| 8 | ! * |
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| 9 | ! Belward, A.S., Estes, J.E., and Kline, K.D., 1999, * |
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| 10 | ! The IGBP-DIS 1-Km Land-Cover Data Set DISCover: * |
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| 11 | ! A Project Overview: Photogrammetric Engineering and Remote Sensing , * |
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| 12 | ! v. 65, no. 9, p. 1013-1020 * |
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| 13 | ! * |
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| 14 | ! if there are no data in the inventory * |
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| 15 | ! the ECMWF land/sea mask is used to distinguish * |
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| 16 | ! between sea (-> ocean) and land (-> grasslands). * |
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| 17 | ! * |
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| 18 | ! Author: A. Stohl * |
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| 19 | ! * |
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| 20 | ! 5 December 1996 * |
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| 21 | ! 8 February 1999 Additional use of nests, A. Stohl * |
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| 22 | ! 29 December 2006 new landuse inventory, S. Eckhardt * |
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| 23 | !***************************************************************************** |
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| 24 | ! * |
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| 25 | ! Variables: * |
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| 26 | ! xlanduse fractions of numclass landuses for each model grid point * |
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| 27 | ! landinvent landuse inventory (0.3 deg resolution) * |
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| 28 | ! * |
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| 29 | !***************************************************************************** |
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| 30 | |
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| 31 | use par_mod |
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| 32 | use com_mod |
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| 33 | |
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| 34 | implicit none |
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| 35 | |
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| 36 | integer :: ix,jy,k,l,li,nrefine,iix,jjy |
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| 37 | integer,parameter :: lumaxx=1200,lumaxy=600 |
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| 38 | integer,parameter :: xlon0lu=-180,ylat0lu=-90 |
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| 39 | real,parameter :: dxlu=0.3 |
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| 40 | real :: xlon,ylat,sumperc,p,xi,yj |
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| 41 | real :: xlandusep(lumaxx,lumaxy,numclass) |
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| 42 | ! character*2 ck |
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| 43 | |
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| 44 | do ix=1,lumaxx |
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| 45 | do jy=1,lumaxy |
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| 46 | do k=1,numclass |
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| 47 | xlandusep(ix,jy,k)=0. |
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| 48 | end do |
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| 49 | sumperc=0. |
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| 50 | do li=1,3 |
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| 51 | sumperc=sumperc+landinvent(ix,jy,li+3) |
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| 52 | end do |
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| 53 | do li=1,3 |
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| 54 | k=landinvent(ix,jy,li) |
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| 55 | if (sumperc.gt.0) then |
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| 56 | p=landinvent(ix,jy,li+3)/sumperc |
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| 57 | else |
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| 58 | p=0 |
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| 59 | endif |
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| 60 | ! p has values between 0 and 1 |
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| 61 | xlandusep(ix,jy,k)=p |
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| 62 | end do |
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| 63 | end do |
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| 64 | end do |
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| 65 | |
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| 66 | ! do 13 k=1,11 |
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| 67 | ! write (ck,'(i2.2)') k |
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| 68 | ! open(4,file='xlandusetest'//ck,form='formatted') |
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| 69 | ! do 11 ix=1,lumaxx |
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| 70 | !11 write (4,*) (xlandusep(ix,jy,k),jy=1,lumaxy) |
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| 71 | !11 write (4,*) (landinvent(ix,jy,k),jy=1,lumaxy) |
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| 72 | !13 close(4) |
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| 73 | |
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| 74 | ! write (*,*) xlon0,ylat0,xlon0n(1),ylat0n(1),nxmin1,nymin1 |
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| 75 | ! write (*,*) dx, dy, dxout, dyout, ylat0, xlon0 |
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| 76 | nrefine=10 |
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| 77 | do ix=0,nxmin1 |
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| 78 | do jy=0,nymin1 |
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| 79 | do k=1,numclass |
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| 80 | sumperc=0. |
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| 81 | xlanduse(ix,jy,k)=0. |
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| 82 | end do |
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| 83 | do iix=1, nrefine |
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| 84 | xlon=(ix+(iix-1)/real(nrefine))*dx+xlon0 ! longitude, should be between -180 and 179 |
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| 85 | if (xlon.ge.(xlon0lu+lumaxx*dxlu)) then |
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| 86 | xlon=xlon-lumaxx*dxlu |
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| 87 | endif |
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| 88 | do jjy=1, nrefine |
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| 89 | ylat=(jy+(jjy-1)/real(nrefine))*dy+ylat0 ! and lat. of each gridpoint |
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| 90 | xi=int((xlon-xlon0lu)/dxlu)+1 |
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| 91 | yj=int((ylat-ylat0lu)/dxlu)+1 |
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| 92 | if (xi.gt.lumaxx) xi=xi-lumaxx |
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| 93 | if (yj.gt.lumaxy) yj=yj-lumaxy |
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| 94 | if (xi.lt.0) then |
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| 95 | write (*,*) 'problem with landuseinv sampling: ', & |
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| 96 | xlon,xlon0lu,ix,iix,xlon0,dx,nxmax |
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| 97 | stop |
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| 98 | endif |
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| 99 | do k=1,numclass |
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| 100 | xlanduse(ix,jy,k)= & |
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| 101 | xlanduse(ix,jy,k)+xlandusep(int(xi),int(yj),k) |
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| 102 | sumperc=sumperc+xlanduse(ix,jy,k) ! just for the check if landuseinv. is available |
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| 103 | end do |
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| 104 | end do |
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| 105 | end do |
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| 106 | if (sumperc.gt.0) then ! detailed landuse available |
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| 107 | sumperc=0. |
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| 108 | do k=1,numclass |
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| 109 | xlanduse(ix,jy,k)= & |
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| 110 | xlanduse(ix,jy,k)/real(nrefine*nrefine) |
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| 111 | sumperc=sumperc+xlanduse(ix,jy,k) |
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| 112 | end do |
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| 113 | !cc the sum of all categories should be 1 ... 100 percent ... in order to get vdep right! |
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| 114 | if (sumperc.lt.1-1E-5) then |
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| 115 | do k=1,numclass |
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| 116 | xlanduse(ix,jy,k)= & |
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| 117 | xlanduse(ix,jy,k)/sumperc |
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| 118 | end do |
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| 119 | endif |
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| 120 | else |
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| 121 | if (lsm(ix,jy).lt.0.1) then ! over sea -> ocean |
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| 122 | xlanduse(ix,jy,3)=1. |
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| 123 | else ! over land -> rangeland |
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| 124 | xlanduse(ix,jy,7)=1. |
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| 125 | endif |
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| 126 | endif |
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| 127 | |
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| 128 | |
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| 129 | end do |
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| 130 | end do |
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| 131 | |
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| 132 | !*********************************** |
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| 133 | ! for test: write out xlanduse |
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| 134 | |
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| 135 | ! open(4,file='landusetest',form='formatted') |
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| 136 | ! do 56 k=1,13 |
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| 137 | ! do 55 ix=0,nxmin1 |
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| 138 | !55 write (4,*) (xlanduse(ix,jy,k),jy=0,nymin1) |
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| 139 | !56 continue |
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| 140 | ! close(4) |
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| 141 | ! write (*,*) 'landuse written' |
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| 142 | !stop |
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| 143 | ! open(4,file='landseatest'//ck,form='formatted') |
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| 144 | ! do 57 ix=0,nxmin1 |
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| 145 | !57 write (4,*) (lsm(ix,jy),jy=0,nymin1) |
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| 146 | ! write (*,*) 'landseamask written' |
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| 147 | |
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| 148 | !**************************************** |
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| 149 | ! Same as above, but for the nested grids |
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| 150 | !**************************************** |
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| 151 | |
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| 152 | !************** TEST ******************** |
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| 153 | ! dyn(1)=dyn(1)/40 |
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| 154 | ! dxn(1)=dxn(1)/40 |
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| 155 | ! xlon0n(1)=1 |
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| 156 | ! ylat0n(1)=50 |
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| 157 | !************** TEST ******************** |
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| 158 | |
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| 159 | do l=1,numbnests |
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| 160 | do ix=0,nxn(l)-1 |
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| 161 | do jy=0,nyn(l)-1 |
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| 162 | do k=1,numclass |
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| 163 | sumperc=0. |
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| 164 | xlandusen(ix,jy,k,l)=0. |
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| 165 | end do |
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| 166 | do iix=1, nrefine |
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| 167 | xlon=(ix+(iix-1)/real(nrefine))*dxn(l)+xlon0n(l) |
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| 168 | do jjy=1, nrefine |
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| 169 | ylat=(jy+(jjy-1)/real(nrefine))*dyn(l)+ylat0n(l) |
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| 170 | xi=int((xlon-xlon0lu)/dxlu)+1 |
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| 171 | yj=int((ylat-ylat0lu)/dxlu)+1 |
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| 172 | if (xi.gt.lumaxx) xi=xi-lumaxx |
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| 173 | if (yj.gt.lumaxy) yj=yj-lumaxy |
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| 174 | do k=1,numclass |
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| 175 | xlandusen(ix,jy,k,l)=xlandusen(ix,jy,k,l)+ & |
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| 176 | xlandusep(int(xi),int(yj),k) |
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| 177 | sumperc=sumperc+xlandusen(ix,jy,k,l) |
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| 178 | end do |
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| 179 | end do |
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| 180 | end do |
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| 181 | if (sumperc.gt.0) then ! detailed landuse available |
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| 182 | sumperc=0. |
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| 183 | do k=1,numclass |
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| 184 | xlandusen(ix,jy,k,l)= & |
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| 185 | xlandusen(ix,jy,k,l)/real(nrefine*nrefine) |
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| 186 | sumperc=sumperc+xlandusen(ix,jy,k,l) |
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| 187 | end do |
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| 188 | !cc the sum of all categories should be 1 ... 100 percent ... in order to get vdep right! |
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| 189 | if (sumperc.lt.1-1E-5) then |
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| 190 | do k=1,numclass |
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| 191 | xlandusen(ix,jy,k,l)=xlandusen(ix,jy,k,l)/sumperc |
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| 192 | end do |
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| 193 | endif |
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| 194 | else ! check land/sea mask |
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| 195 | if (lsmn(ix,jy,l).lt.0.1) then ! over sea -> ocean |
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| 196 | xlandusen(ix,jy,3,l)=1. |
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| 197 | else ! over land -> grasslands |
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| 198 | xlandusen(ix,jy,7,l)=1. |
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| 199 | endif |
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| 200 | endif |
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| 201 | end do |
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| 202 | end do |
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| 203 | end do |
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| 204 | |
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| 205 | !*********************************** |
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| 206 | ! for test: write out xlanduse |
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| 207 | |
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| 208 | ! do 66 k=1,11 |
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| 209 | ! write (ck,'(i2.2)') k |
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| 210 | ! open(4,file='nlandusetest'//ck,form='formatted') |
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| 211 | ! do 65 ix=0,nxn(1)-1 |
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| 212 | !65 write (4,*) (xlandusen(ix,jy,k,1),jy=0,nyn(1)-1) |
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| 213 | !66 close(4) |
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| 214 | |
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| 215 | ! write (*,*) 'landuse nested written' |
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| 216 | |
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| 217 | |
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| 218 | end subroutine assignland |
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