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module diag_pbl
contains
subroutine get_hpbl_old(hpbla, kpbl, theta_v, z, z_surf, kl, cor, ustar)
implicit none
real, intent(in):: cor, ustar, z_surf
integer, intent(in):: kl
real, intent(in), dimension(KL):: theta_v, z
real, intent(out):: hpbla
integer, intent(out):: kpbl
!local variabls
real :: dz_low, hdyn, dz_hdyn, dz_conv
integer:: k, kpbld, kpblc
dz_low = z(kl) - z_surf
hdyn = AMIN1(dz_low , 0.5E0 * ustar/cor)
kpblc = kl
kpbld = kl
do k = kl-1,1,-1
dz_hdyn = dz_low - HDYN
dz_conv = theta_v(k) - theta_v(kl)
if(kpbld.EQ.kl .AND. dz_hdyn.GE.0.E0) kpbld = k
if(kpblc.EQ.kl .AND. dz_conv.GT.0.E0) kpblc = k
enddo
kpbl = MIN0(kpblc, kpbld, KL-2)
hpbla = z(kpbl) - z_surf
end subroutine get_hpbl_old
subroutine get_hpbl(hpbla, kpbl, theta_v, z, z_surf, kl, cor, ustar)
implicit none
real, intent(in):: cor, ustar, z_surf
integer, intent(in):: kl
real, intent(in), dimension(KL):: theta_v, z
real, intent(out):: hpbla
integer, intent(out):: kpbl
!local variabls
real :: dz_low, hdyn, dz_hdyn, dz_conv
integer:: k, kpbld, kpblc
dz_low = z(kl) - z_surf
hdyn = AMIN1(dz_low , 0.5E0 * ustar/cor)
kpblc = kl
kpbld = kl
do k = kl-1,1,-1
dz_hdyn = dz_low - HDYN
dz_conv = theta_v(k) - theta_v(kl)
if(kpbld.EQ.kl .AND. dz_hdyn.GE.0.E0) kpbld = k
if(kpblc.EQ.kl .AND. dz_conv.GT.0.E0) kpblc = k
enddo
kpbl = MIN0(kpblc, kpbld, KL-2)
hpbla = z(kpbl) - z_surf
end subroutine get_hpbl
subroutine diag_pblh_inmcm(z,thetav,lat,zs,ustar,kl,hpbl)
! This subroutine calculates height of the PBL above ground level according to INMCM algorithm
! input:
! z - array with heights above sea level
! zs - height of surface above sea level
! thetav - array with virtual potential temperatures
! lat - latitude
! ustar - ustar at the lowest model level
! kl - number of vertical levels
!!! IMPORTANT: In INMCM model vertical levels start form the top of the atmosphere, so arrays should be organized accordingly
! output:
! hpbl - height of PBL
implicit none
integer,intent(in)::kl
real,intent(in),dimension(kl)::z,thetav
real,intent(in)::lat,zs,ustar
real,intent(out)::hpbl
real,parameter::omega=7.2921/(10**5)
real,parameter::cormin=5.0/(10**5)
real cor,yzkl,hdyn,ydelz,ydeltv
integer KPBL,KPBLC,KPBLD,k
cor = 2 * omega * sin (lat * 3.14 / 180)
cor = max(cormin,abs(cor))
yzkl = z(kl)-zs
hdyn = min(yzkl,0.5 * ustar/cor)
ydelz = yzkl - hdyn
if(ydelz.ge.0)then
KPBLD = kl-1
else
KPBLD = kl
endif
KPBLC = kl
do k=kl-1,1,-1
ydeltv = thetav(k) - thetav(kl)
if(KPBLC.eq.kl.and.ydeltv.gt.0) KPBLC = k
enddo
KPBL = min(KPBLC,KPBLD,KL-2)
call get_hpbl(hpbl, kpbl, thetav, z, zs, kl, cor, ustar)
!hpbl = z(KPBL) - zs
return
end subroutine diag_pblh_inmcm
subroutine diag_pblh_rib(theta,z,u,kl,zs,hpbl,nkpbl)
! This subroutine calculates PBL depth according to (Troen and Mahrt 1986) as the lowest level where Rib>Ric
! Ric varies between 0.15 and 0.5
! Rib = (g/theta0)*(theta(z)-theta(s))*z/u(z)**2
!input:
! theta - array with (virtual) potential temperature
! z - array with heights above sea level
! u - array with wind speed
! zs - height of surface above sea level
! kl - number of vertical levels
! output:
! hpbl - PBL height above ground level
!!! IMPORTANT: In INMCM model vertical levels start form the top of the atmosphere, so arrays should be organized accordingly
implicit none
integer,intent(in)::kl
real,intent(in),dimension(kl)::z,theta,u
real,intent(in)::zs
real,intent(out)::hpbl
integer,intent(out)::nkpbl
real,parameter:: g = 9.81
real,parameter:: Ric = 0.25
real,parameter:: theta0 = 300.0
real,parameter:: upper_bound = 6000 !upper boundary of PBLH
real,dimension(kl)::Rib
real du
integer k,KPBL
KPBL=kl
do k=kl-1,1,-1
if(z(k).lt.upper_bound)then
du = u(k)-u(kl)
if(du.eq.0) du = 0.1
Rib(k) = (g / theta0) * (theta(k) - theta(kl)) * (z(k) - z(kl)) / (du**2)
if(Rib(k).ge.Ric.and.KPBL.eq.kl)then
KPBL = k
if(KPBL.le.kl-2)then
hpbl = z(k) - (z(k)-z(k+1))*(Rib(k)-Ric)/(Rib(k)-Rib(k+1))
else
hpbl = z(k)
endif
endif
endif
enddo
if(KPBL.eq.kl) hpbl=z(kl)
hpbl = hpbl - zs
nkpbl = kl - KPBL + 1
end subroutine diag_pblh_rib
subroutine diag_pblh_rh(t,z,q,p,kl,zs,hpbl,nkpbl)
! This subroutine calculates PBL height as height where minimal gradient of relative humidity is found
!input:
! t - air temperature (not potential)
! z - heights above sea level
! q - specific humidity
! p - pressure
! u - wind speed
! zs - height of surface above sea level
! kl - number of vertical levels; index of the lowest level
! output:
! hpbl - PBL height above ground level
! nkpbl - number of levels inside PBL
!!! IMPORTANT: In INMCM model vertical levels start form the top of the atmosphere, so arrays should be organized accordingly
implicit none
integer,intent(in)::kl
real,intent(in),dimension(kl)::t,z,q,p
real,intent(in)::zs
real,intent(out)::hpbl
integer,intent(out)::nkpbl
real,dimension(kl):: Es,rh
real,parameter::E0 = 611.0
real,parameter:: upper_bound = 6000 !maximum PBLH
integer i,j,k,KPBL
real mindrh,drhdz
Es(:) = E0*10**(7.45*(t(:)-273.15)/(235+t(:)-273.15))
rh(:) = 100*q(:)*p(:)/(0.622*Es(:))
KPBL=kl
mindrh = 100.0
do k=kl-1,1,-1
if(z(k).lt.upper_bound)then
drhdz = rh(k) - rh(k+1)
if(drhdz.lt.mindrh)then
KPBL = k
mindrh = drhdz
endif
endif
enddo
hpbl = z(KPBL) - zs
nkpbl = kl - KPBL + 1
end subroutine diag_pblh_rh
end module diag_pbl