source: trunk/LMDZ.GENERIC/libf/phystd/bilinear.F90 @ 1477

Last change on this file since 1477 was 716, checked in by rwordsworth, 12 years ago

Mainly updates to radiative transfer and gas management scheme.
Most CIA data now read from standard HITRAN datafiles. For the H2O
continuum, two options have been added: the standard CKD continuum,
and the empirical formula in PPC (Pierrehumbert 2010). Use the toggle
'H2Ocont_simple' in callphys.def to choose.

Note to Martians: I've changed the default values of 'sedimentation' and
'co2cond' in inifis to false. Both these are defined in the standard deftank
callphys.def file, so there shouldn't be any compatibility problems.

File size: 460 bytes
Line 
1!-------------------------------------------------------------------------
2subroutine bilinear(f,f11,f21,f12,f22,x,x1,x2,y,y1,y2) 
3! Used for interpolation of continuum data
4
5  implicit none
6
7  real*8 x,y,x1,x2,y1,y2
8  real*8 f,f11,f12,f21,f22,fA,fB
9
10  ! 1st in x-direction
11  fA=f11*(x2-x)/(x2-x1)+f21*(x-x1)/(x2-x1)
12  fB=f12*(x2-x)/(x2-x1)+f22*(x-x1)/(x2-x1)
13
14  ! then in y-direction
15  f=fA*(y2-y)/(y2-y1)+fB*(y-y1)/(y2-y1)
16
17  return
18end subroutine bilinear
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