Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Calculate higher-order flux across grounding line #94

Merged
merged 3 commits into from
Oct 9, 2023
Merged

Calculate higher-order flux across grounding line #94

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
8599138
Add higher order thickness flux on edges to Registry
trhille Oct 4, 2023
4eb8b82
Calculate higher-order fluxAcrossGroundingLine
trhille Oct 4, 2023
8be7fbb
Generalize layerThicknessEdgeFlux for all thickness advection
trhille Oct 4, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
3 changes: 3 additions & 0 deletions components/mpas-albany-landice/src/Registry.xml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1433,6 +1433,9 @@ is the value of that variable from the *previous* time level!
<var name="layerNormalVelocity" type="real" dimensions="nVertLevels nEdges Time" units="m s^{-1}"
description="horizonal velocity, normal component to an edge, layer midpoint"
/>
<var name="layerThicknessEdgeFlux" type="real" dimensions="nVertLevels nEdges Time" units="m^2 s^{-1}"
Copy link

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

nitpicky question - could/should this be called just layerEdgeFlux? I don't feel strongly about this and it's not important enough to change everywhere unless you like the idea.

Copy link
Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

MPAS-Ocean calls it normalThicknessFlux, so I left "thickness" in the name. I could go either way.

description="layer-normal thickness flux on edges"
/>
<var name="normalVelocityInitial" type="real" dimensions="nVertInterfaces nEdges Time" units="m s^{-1}"
description="horizonal velocity, normal component to an edge, computed at initialization"
/>
Expand Down
35 changes: 20 additions & 15 deletions components/mpas-albany-landice/src/mode_forward/mpas_li_advection.F
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -166,7 +166,8 @@ subroutine li_advection_thickness_tracers(&
layerThickness, & ! thickness of each layer
layerThicknessOld, & ! old layer thickness
layerThicknessEdge, & ! layer thickness on upstream edge of cell
normalVelocity ! horizontal velocity on interfaces
normalVelocity, & ! horizontal velocity on interfaces
layerThicknessEdgeFlux ! higher order thickness flux on layers and edges

real (kind=RKIND), dimension(:,:,:), pointer :: &
advectedTracers, & ! values of advected tracers
Expand All @@ -193,7 +194,6 @@ subroutine li_advection_thickness_tracers(&

! Allocatable arrays need for flux-corrected transport advection
real (kind=RKIND), dimension(:,:,:), allocatable :: tend
real (kind=RKIND), dimension(:,:,:), allocatable :: activeTracerHorizontalAdvectionEdgeFlux

integer, dimension(:), pointer :: &
cellMask, & ! integer bitmask for cells
Expand Down Expand Up @@ -292,6 +292,7 @@ subroutine li_advection_thickness_tracers(&

! get arrays from the velocity pool
call mpas_pool_get_array(velocityPool, 'layerNormalVelocity', layerNormalVelocity)
call mpas_pool_get_array(velocityPool, 'layerThicknessEdgeFlux', layerThicknessEdgeFlux)
call mpas_pool_get_array(velocityPool, 'normalVelocity', normalVelocity)
call mpas_pool_get_array(velocityPool, 'fluxAcrossGroundingLine', fluxAcrossGroundingLine)
call mpas_pool_get_array(velocityPool, 'fluxAcrossGroundingLineOnCells', fluxAcrossGroundingLineOnCells)
Expand Down Expand Up @@ -368,6 +369,7 @@ subroutine li_advection_thickness_tracers(&

! save old copycellMask for determining cells changing from grounded to floating and vice versa
cellMaskTemporaryField % array(:) = cellMask(:)
layerThicknessEdgeFlux(:,:) = 0.0_RKIND

!-----------------------------------------------------------------
! Horizontal transport of thickness and tracers
Expand Down Expand Up @@ -413,8 +415,6 @@ subroutine li_advection_thickness_tracers(&
(trim(config_tracer_advection) .eq. 'fct' ) ) then
allocate(tend(nTracers,nVertLevels,nCells+1))
tend(:,:,:) = 0.0_RKIND
allocate(activeTracerHorizontalAdvectionEdgeFlux(nTracers,nVertLevels+1,nEdges+1))
activeTracerHorizontalAdvectionEdgeFlux(:,:,:) = 0.0_RKIND
endif

! Transport thickness and tracers
Expand Down Expand Up @@ -481,25 +481,25 @@ subroutine li_advection_thickness_tracers(&
call li_tracer_advection_fct_tend(&
tend, advectedTracers, layerThicknessOld, &
layerThicknessEdge * layerNormalVelocity, 0 * normalVelocity, dt, &
nTracers, activeTracerHorizontalAdvectionEdgeFlux, computeBudgets=.false.)!{{{
nTracers, layerThicknessEdgeFlux, computeBudgets=.false.)!{{{
elseif (trim(config_thickness_advection) .eq. 'fct') then
! Call fct routine for thickness first, and use activeTracerHorizontalAdvectionEdgeFlux
! Call fct routine for thickness first, and use layerThicknessEdgeFlux
! returned by that call as normalThicknessFlux for call to tracer fct
call li_tracer_advection_fct_tend(&
tend(nTracers:,:,:), advectedTracers(nTracers:,:,:), layerThicknessOld * 0.0_RKIND + 1.0_RKIND, &
layerNormalVelocity, 0.0_RKIND * normalVelocity, dt, &
1, activeTracerHorizontalAdvectionEdgeFlux(nTracers:,:,:), computeBudgets=.false.)
1, layerThicknessEdgeFlux, computeBudgets=.false.)
! layerThickness is last tracer. However, for some reason
! this: layerThickness(:,:) = advectedTracers(nTracers,:,:) does not conserve mass!
! This does conserve mass:
layerThickness(:,:) = layerThickness(:,:) + tend(nTracers,:,:) * dt

if (trim(config_tracer_advection) .eq. 'fct') then
! Call fct for tracers, using activeTracerHorizontalAdvectionEdgeFlux
! Call fct for tracers, using layerThicknessEdgeFlux
! from fct thickness advection as normalThicknessFlux
call li_tracer_advection_fct_tend(&
tend(1:nTracers-1,:,:), advectedTracers(1:nTracers-1,:,:), layerThicknessOld, &
activeTracerHorizontalAdvectionEdgeFlux(nTracers,:,:), 0.0_RKIND * normalVelocity, dt, &
layerThicknessEdgeFlux, 0.0_RKIND * normalVelocity, dt, &
nTracers-1, computeBudgets=.false.)
elseif (trim(config_tracer_advection) .eq. 'none') then
! do nothing
Expand Down Expand Up @@ -642,10 +642,16 @@ subroutine li_advection_thickness_tracers(&
GLfluxSign = -1.0_RKIND
theGroundedCell = iCell2
endif
do k = 1, nVertLevels
thicknessFluxEdge = layerNormalVelocity(k,iEdge) * dvEdge(iEdge) * layerThicknessEdge(k,iEdge)
fluxAcrossGroundingLine(iEdge) = fluxAcrossGroundingLine(iEdge) + GLfluxSign * thicknessFluxEdge / dvEdge(iEdge)
enddo
if (trim(config_thickness_advection) == 'fct') then
do k = 1, nVertLevels
fluxAcrossGroundingLine(iEdge) = fluxAcrossGroundingLine(iEdge) + GLfluxSign * layerThicknessEdgeFlux(k,iEdge)
enddo
else
do k = 1, nVertLevels
layerThicknessEdgeFlux(k,iEdge) = layerNormalVelocity(k,iEdge) * layerThicknessEdge(k,iEdge)
fluxAcrossGroundingLine(iEdge) = fluxAcrossGroundingLine(iEdge) + GLfluxSign * layerThicknessEdgeFlux(k,iEdge)
enddo
endif
! assign to grounded cell in fluxAcrossGroundingLineOnCells
if (thickness(theGroundedCell) <= 0.0_RKIND) then
! This should never be the case, but checking to avoid possible divide by zero
Expand Down Expand Up @@ -714,8 +720,7 @@ subroutine li_advection_thickness_tracers(&
advCoefs3rd, &
advMaskHighOrder, &
advMask2ndOrder, &
tend, &
activeTracerHorizontalAdvectionEdgeFlux)
tend)
endif

! clean up
Expand Down
15 changes: 8 additions & 7 deletions components/mpas-albany-landice/src/mode_forward/mpas_li_advection_fct.F
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -65,7 +65,7 @@ subroutine li_tracer_advection_fct_tend( &
tend, tracers, layerThickness, &
normalThicknessFlux, w, dt, &
nTracers, &
activeTracerHorizontalAdvectionEdgeFlux, &
layerThicknessEdgeFlux, &
computeBudgets)!{{{
use li_mesh
!-----------------------------------------------------------------
Expand All @@ -74,8 +74,8 @@ subroutine li_tracer_advection_fct_tend( &

real (kind=RKIND), dimension(:,:,:), intent(inout) :: &
tend !< [inout] Tracer tendency to which advection added
real (kind=RKIND), dimension(:,:,:), intent(inout), optional :: &
activeTracerHorizontalAdvectionEdgeFlux !< [inout] used to compute higher order normalThicknessFlux
real (kind=RKIND), dimension(:,:), intent(inout), optional :: &
layerThicknessEdgeFlux !< [inout] used to compute higher order normalThicknessFlux
!-----------------------------------------------------------------
! Input parameters
!-----------------------------------------------------------------
Expand Down Expand Up @@ -462,18 +462,19 @@ subroutine li_tracer_advection_fct_tend( &
#endif
! Compute budget and monotonicity diagnostics if needed

! Use activeTracerHorizontalAdvectionEdgeFlux from the call to fct for thickness
! Use layerThicknessEdgeFlux from the call to fct for thickness
! advection as the higher-order normalThicknessFlux for fct tracer advection.
if (present(activeTracerHorizontalAdvectionEdgeFlux)) then
if (present(layerThicknessEdgeFlux)) then
do iEdge = 1,nEdges
do k = 1, nVertLevels
! Save u*h*T flux on edge for analysis. This variable will be
! divided by h at the end of the time step.
! average normal velocities from layer interfaces to layer midpoints
if (dvEdge(iEdge) > 0.0_RKIND) then
activeTracerHorizontalAdvectionEdgeFlux(iTracer,k,iEdge) = &
layerThicknessEdgeFlux(k,iEdge) = &
(lowOrderFlx(k,iEdge) + highOrderFlx(k,iEdge))/dvEdge(iEdge)
else
activeTracerHorizontalAdvectionEdgeFlux(iTracer,k,iEdge) = 0.0_RKIND
layerThicknessEdgeFlux(k,iEdge) = 0.0_RKIND
endif
enddo
enddo
Expand Down