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NEMO Workspace
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Reference manuals
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2d869741
Commit
2d869741
authored
4 months ago
by
Andrew Coward
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Few more corrections to chap_D2D.tex file
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2a994117
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Resolve "Review/update DYN chapter"
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latex/NEMO/subfiles/chap_D2D.tex
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-6
5 additions, 6 deletions
latex/NEMO/subfiles/chap_D2D.tex
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2d869741
...
...
@@ -106,7 +106,7 @@ Note that this option is not yet available with RK3 time-stepping.
%\nlst{namsplit}
The split-explicit free surface formulation used in
\NEMO\
(
\np
{
ln
_
dynspg
_
ts
}{
ln
\_
dynspg
\_
ts
}
set to true
), also called the time-splitting
(
\np
[=.true.]
{
ln
_
dynspg
_
ts
}{
ln
\_
dynspg
\_
ts
}
), also called the time-splitting
formulation, follows the one proposed by
\citet
{
shchepetkin.mcwilliams
_
OM05
}
. The general
idea is to solve the free surface equation and the associated barotropic velocity
equations with a smaller time step than
$
\rdt
$
, the time step used for the three
...
...
@@ -140,13 +140,12 @@ hand side of \autoref{eq:D2D_BT_dyn} represents the bottom stress (see section
\autoref
{
sec:ZDF
_
drg
}
), explicitly accounted for at each barotropic iteration.
For 'single 1
$^{
\mathrm
st
}$
', RK3 time-stepping, barotropic velocities and sea surface
height are calculated for the
{
\textit
after
}
timestep from the
{
\textit
before
}
values
height are calculated for the
\textit
{
after
}
timestep from the
\textit
{
before
}
values
prior to the first stage of the main RK3 timestepping. This occurs in the new module
\forcode
{
stp2d.F90
}
which computes the RHS forcing terms from
{
\textit
before
}
fields and
\forcode
{
stp2d.F90
}
which computes the RHS forcing terms from
\textit
{
before
}
fields and
then calls the
\forcode
{
dyn
_
spg
_
ts
}
routine to perform the time-stepping as detailed
below. In the MLF time-stepping case, RHS forcing terms are computed inside
\forcode
{
dyn
_
spg
_
ts
}
itself and the time index used will depend on options chosen in
\forcode
{
namspgts
}
.
\forcode
{
dyn
_
spg
_
ts
}
itself.
For clarity, in RK3 the RHS forcing terms on momentum are vertically averaged 3D trends of:
\[
...
...
@@ -275,7 +274,7 @@ river runoff is taken into account when computing the net freshwater flux.
parameterised contributions from ice-shelf cavities are taken into account when computing
the net freshwater flux.
(3) When
\np
[=.true.]
{
ln
_
sdw
}{
ln
\_
sdw
}
(see
\autoref
{
sec:SBC
_
wave
_
sdw
}
), the contribution from
(3) When
\np
[=.true.]
{
ln
_
sdw
}{
ln
\_
sdw
}
(see
\autoref
{
sub
sec:SBC
_
wave
_
sdw
}
), the contribution from
divergence due to Stoke's drift is taken into account when computing the net freshwater
flux.
...
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