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Slight modification in orographic gravity wave drag (OGWD) scheme #287

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Merged
grantfirl merged 4 commits into from
Jun 24, 2025
Merged

Slight modification in orographic gravity wave drag (OGWD) scheme #287

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c0d1ab9
modifies href calcuation to href=max(Omax, 2*sigma, hpbl)
rhaesung May 22, 2025
fee5340
update drag_suite.F90 based on Mike Toy's comment
rhaesung May 27, 2025
ef97ca0
Merge remote-tracking branch 'upstream/ufs/dev' into ogwd
rhaesung Jun 4, 2025
f8f1086
Merge remote-tracking branch 'upstream/ufs/dev' into ogwd
rhaesung Jun 20, 2025
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9 changes: 6 additions & 3 deletions physics/GWD/drag_suite.F90
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Original file line number Diff line number Diff line change
Expand Up @@ -1731,7 +1731,7 @@ subroutine drag_suite_psl( &
real(kind=kind_phys),parameter :: odmax = 10.
real(kind=kind_phys),parameter :: cdmin = 0.0
integer :: komax(im),kbmax(im),kblk(im)
real(kind=kind_phys) :: hmax(im)
real(kind=kind_phys) :: href(im),hmax(im)
real(kind=kind_phys) :: cd
real(kind=kind_phys) :: zblk,tautem
real(kind=kind_phys) :: pe,ke
Expand Down Expand Up @@ -1916,6 +1916,7 @@ subroutine drag_suite_psl( &
! initialize array for flow-blocking drag
!
taufb(1:im,1:km+1) = 0.0
href(1:im) = 0.0
hmax(1:im) = 0.0
komax(1:im) = 0
kbmax(1:im) = 0
Expand Down Expand Up @@ -2000,11 +2001,13 @@ subroutine drag_suite_psl( &
!
do i = its,im
hmax(i) = max(elvmax(i),zlowtop(i))
href(i) = max(hmax(i),hpbl(i))
enddo
!
do i = its,im
!!! kbl(i) = max(kpbl(i), klowtop(i)) ! do not use pbl height for the time being...
kbl(i) = max(komax(i), klowtop(i))
kbl(i) = max(komax(i), klowtop(i))
kbl(i) = max(kbl(i), kpbl(i))
kbl(i) = max(min(kbl(i),kpblmax),kpblmin)
enddo
!
Expand Down Expand Up @@ -2109,7 +2112,7 @@ subroutine drag_suite_psl( &
!
! no drag when sub-oro is too small..
!
ldrag(i) = hmax(i).le.hmt_min
ldrag(i) = href(i).le.hmt_min
!
! no drag when critical level in the base layer
!
Expand Down
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