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Last change
on this file since 597 was
305,
checked in by rwordsworth, 13 years ago
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Several new files added as part of the climate evolution model
(main program kcm.F90). Some general cleanup in physiq.F90 and
callcorrk.F90. Bugs in dust radiative transfer and H2 Rayleigh
scattering corrected.
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File size:
1.9 KB
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| Line | |
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| 1 | !------------------------------------------------------------------------- |
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| 2 | subroutine bilinear(x_arr,y_arr,nX,nY,f2d_arr,x_in,y_in,f) |
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| 3 | ! Necessary for interpolation of continuum data |
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| 4 | |
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| 5 | implicit none |
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| 6 | |
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| 7 | integer nX,nY,i,j,a,b |
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| 8 | |
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| 9 | real*8 x_in,y_in,x,y,x1,x2,y1,y2 |
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| 10 | real*8 f,f11,f12,f21,f22,fA,fB |
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| 11 | real*8 x_arr(nX) |
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| 12 | real*8 y_arr(nY) |
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| 13 | real*8 f2d_arr(nX,nY) |
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| 14 | |
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| 15 | integer strlen |
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| 16 | character*100 label |
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| 17 | label='subroutine bilinear' |
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| 18 | |
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| 19 | x=x_in |
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| 20 | y=y_in |
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| 21 | |
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| 22 | ! 1st check we're within the wavenumber range |
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| 23 | if ((x.lt.x_arr(2)).or.(x.gt.x_arr(nX-2))) then |
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| 24 | f=0.0D+0 |
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| 25 | return |
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| 26 | else |
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| 27 | |
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| 28 | ! in the x (wavenumber) direction 1st |
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| 29 | i=1 |
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| 30 | 10 if (i.lt.(nX+1)) then |
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| 31 | if (x_arr(i).gt.x) then |
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| 32 | x1=x_arr(i-1) |
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| 33 | x2=x_arr(i) |
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| 34 | a=i-1 |
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| 35 | i=9999 |
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| 36 | endif |
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| 37 | i=i+1 |
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| 38 | goto 10 |
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| 39 | endif |
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| 40 | endif |
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| 41 | |
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| 42 | if ((y.lt.y_arr(1)).or.(y.gt.y_arr(nY))) then |
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| 43 | write(*,*) 'Warning from bilinear.for:' |
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| 44 | write(*,*) 'Outside continuum temperature range!' |
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| 45 | if(y.lt.y_arr(1))then |
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| 46 | y=y_arr(1)+0.01 |
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| 47 | endif |
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| 48 | if(y.gt.y_arr(nY))then |
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| 49 | y=y_arr(nY)-0.01 |
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| 50 | endif |
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| 51 | else |
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| 52 | |
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| 53 | ! in the y (temperature) direction 2nd |
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| 54 | j=1 |
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| 55 | 20 if (j.lt.(nY+1)) then |
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| 56 | if (y_arr(j).gt.y) then |
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| 57 | y1=y_arr(j-1) |
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| 58 | y2=y_arr(j) |
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| 59 | b=j-1 |
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| 60 | j=9999 |
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| 61 | endif |
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| 62 | j=j+1 |
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| 63 | goto 20 |
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| 64 | endif |
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| 65 | endif |
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| 66 | |
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| 67 | f11=f2d_arr(a,b) |
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| 68 | f21=f2d_arr(a+1,b) |
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| 69 | f12=f2d_arr(a,b+1) |
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| 70 | f22=f2d_arr(a+1,b+1) |
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| 71 | |
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| 72 | ! 1st in x-direction |
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| 73 | fA=f11*(x2-x)/(x2-x1)+f21*(x-x1)/(x2-x1) |
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| 74 | fB=f12*(x2-x)/(x2-x1)+f22*(x-x1)/(x2-x1) |
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| 75 | |
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| 76 | ! then in y-direction |
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| 77 | f=fA*(y2-y)/(y2-y1)+fB*(y-y1)/(y2-y1) |
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| 78 | |
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| 79 | return |
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| 80 | end subroutine bilinear |
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