m_mkmxlayer.F90
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module m_mkmxlayer
contains
subroutine mkmxlayer(MM,dt)
! Generates the mixedlayer depth as a function of time
! Computation on over one year on a fixed grid which is
! independent of ndim, results in identical smoothing
! and the same form of mxlayer when ndim and/or tfin is changed
use mod_dimensions
use m_shapiro
use m_getmxlay
implicit none
real, intent(out) :: MM(ndim)
real, intent(in) :: dt
real, allocatable :: YMM(:)
integer n
real time
integer, parameter :: ydim=400.0
real, parameter :: year=365.0
real ydt
allocate(YMM(ydim))
! First computes mixedlayer over one year on a fixed grid resolution
ydt=year/float(ydim-1)
do n=1,ydim
time=float(n-1)*ydt
YMM(n)=mixldpth(time)
enddo
! The smooth analytical mxlayer on fixed grid
do n=1,200
call shapiro(1,YMM,ydim)
enddo
! Then interpolate mxlayer to MM(ndim)
open(44,file='MixedLayerDepth.dat')
do n=1,ndim
time=float(n-1)*dt
MM(n)=getmxlay(YMM,ydim,time,ydt)
write(44,*)time,MM(n)
enddo
close(44)
deallocate(YMM)
contains
function mixldpth(time)
! function for computing the mixed layer depth
use mod_dimensions
implicit none
real, intent(in) :: time
real mixldpth
real t
real, parameter :: M0=62.0
real, parameter :: M1=M0 + 0.30*60.0
real, parameter :: M2=M1 - 3.05*(100.0-82.0)
t=mod(time,365.0)
select case (int(t))
case (:59)
mixldpth = M0 + 0.30*t
case (60:81)
mixldpth= M1
case (82:99)
mixldpth = M1 - 3.05*(t-82.0)
case (100:239)
mixldpth = M2
case (240:364)
mixldpth = M2 + 0.2952*(t-240.0)
case default
print *,'mixldpth: problem'
stop
end select
end function mixldpth
end subroutine mkmxlayer
end module