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cam6_4_059: issue 1212 bug fix (cloud frac ice+liquid) #1230

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merged 6 commits into from
Feb 4, 2025
Merged

cam6_4_059: issue 1212 bug fix (cloud frac ice+liquid) #1230

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c08de27
issue 1212 bug fix (cloud frac ice+liquid)
PeterHjortLauritzen Jan 23, 2025
c6b96bb
update changelog
PeterHjortLauritzen Jan 23, 2025
0411085
Remove commented out line
cacraigucar Jan 23, 2025
0d6d47a
Merge tag 'cam6_4_058' into issue1212_nucleate_ice_cam_bugfix
cacraigucar Feb 4, 2025
33c62b9
preliminary Changelog
cacraigucar Feb 4, 2025
6e90910
Update ChangeLog
cacraigucar Feb 4, 2025
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6 changes: 6 additions & 0 deletions doc/ChangeLog
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Original file line number Diff line number Diff line change
@@ -1,3 +1,9 @@
One-line Summary: cloud frac bug in nucleate_ice_cam.F90

Purpose of changes (include the issue number and title text for each relevant GitHub issue):

ice cloud fraction not set correctly (set to ice+liquid but should only be ice). (Github issue #1212)

===============================================================

Tag name: cam6_4_056
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12 changes: 5 additions & 7 deletions src/physics/cam/nucleate_ice_cam.F90
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Expand Up @@ -69,7 +69,7 @@ module nucleate_ice_cam
naai_hom_idx = -1

integer :: &
ast_idx = -1
aist_idx = -1

integer :: &
qsatfac_idx = -1
Expand Down Expand Up @@ -360,7 +360,7 @@ subroutine nucleate_ice_cam_init(mincld_in, bulk_scale_in, pbuf2d, aero_props)
mincld)

! get indices for fields in the physics buffer
ast_idx = pbuf_get_index('AST')
aist_idx = pbuf_get_index('AIST')

end subroutine nucleate_ice_cam_init

Expand Down Expand Up @@ -400,8 +400,7 @@ subroutine nucleate_ice_cam_calc( &
real(r8), pointer :: pmid(:,:) ! pressure at layer midpoints (pa)

real(r8), pointer :: aer_mmr(:,:) ! aerosol mass mixing ratio

real(r8), pointer :: ast(:,:)
real(r8), pointer :: aist(:,:)
real(r8) :: icecldf(pcols,pver) ! ice cloud fraction
real(r8), pointer :: qsatfac(:,:) ! Subgrid cloud water saturation scaling factor.

Expand Down Expand Up @@ -509,9 +508,8 @@ subroutine nucleate_ice_cam_calc( &
end if

itim_old = pbuf_old_tim_idx()
call pbuf_get_field(pbuf, ast_idx, ast, start=(/1,1,itim_old/), kount=(/pcols,pver,1/))

icecldf(:ncol,:pver) = ast(:ncol,:pver)
call pbuf_get_field(pbuf, aist_idx, aist, start=(/1,1,itim_old/), kount=(/pcols,pver,1/))
icecldf(:ncol,:pver) = aist(:ncol,:pver)

! naai and naai_hom are the outputs from this parameterization
call pbuf_get_field(pbuf, naai_idx, naai)
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