@@ -8,11 +8,15 @@ initial conditions, forward simulations, and validation for global,
88realistic ocean domains. These are single layer, barotropic simulations
99forced with tidal potential. Self-attraction and loading effects are included
1010as well as a parameterization for topographic wave drag.
11+ Currently the `Zarron and Egbert (2006) <https://doi.org/10.1175/JPO2878.1 >`_
12+ wave drag parameterization is the default option. But MPAS-Ocean also supports
13+ the `local generation formula <https://doi.org/10.5194/gmd-14-1125-2021 >`_ and
14+ `Jayne and St.Laurent (2001) <https://doi.org/10.1029/2000GL012044 >`_.
1115Wetting and drying is turned on in these configurations to prevent minimum
1216depth issues.
1317The tidal solution is decomposed into harmonic constituents during the
1418simulation and are compared with the TPXO database.
15- Currently, the icosaheral 7 mesh is supported with
19+ Currently, the icosaheral 7 and vr45to5 meshes are supported with
1620more mesh resolutions to be added in the future.
1721
1822Shared config options
@@ -87,6 +91,20 @@ mesh test case
8791The mesh test case produces the horizontal mesh. The base mesh has global coverage
8892and is culled to remove land cells. Cells beneath ice shelves are retained in the mesh.
8993
94+ Icos7
95+ ^^^^^
96+ This mesh is an Icosahedral mesh with 7 refienemnt steps, resulting in a globally uniform
97+ resolution of about 60km. This mesh is meant for efficient testing of tidal physics and
98+ does not produce very accurate global tides (Deep RMSE M2 ~11cm).
99+
100+ VR45to5
101+ ^^^^^^^
102+ This is a variable resolution mesh that ranges between 45km to 5km
103+ at the coasts. It uses refiniment criteria based on depth and bathymetric slope.
104+ More details can be found in `Barton et al. (2022) <https://doi.org/10.1029/2022MS003207 >`_.
105+ This mesh achieves a more accurate tidal result competitive with other non-data assimilative
106+ models (Deep RMSE M2 ~3.3cm).
107+
90108.. _tides_init :
91109
92110init test case
@@ -98,17 +116,21 @@ remap bathymetry step
98116^^^^^^^^^^^^^^^^^^^^^
99117This step performs an integral remap of bathymetric data onto the MPAS-O mesh
100118
101- interpolate wave drag step
119+ calculate wave drag step
102120^^^^^^^^^^^^^^^^^^^^^^^^^^
103- In this step, a timescale factor from HYCOM data is interpolated onto
121+ In this step, a several values are calculated and interpolated onto
104122the MPAS-O mesh to be used in the topographic wave drag parameterization.
105- A plot is also produced to verify the interpolation.
123+ The climatological depth-averaged and bottom bouancy frequency values are
124+ interpolated from WOA are interpolated onto the MPAS mesh. The bathymetric
125+ gradients are also computed along with the standard deviaion of the subgrid
126+ bathymetry.
106127
107128initial state step
108129^^^^^^^^^^^^^^^^^^
109130The initial state step runs MPAS-Ocean in init mode to create the initial
110131condition file for the forward run. The vertical mesh is setup for a
111- single layer.
132+ single layer. This step also computes the adjusted sea surface height,
133+ accounting for land ice pressure.
112134
113135.. _tides_forward :
114136
@@ -132,6 +154,14 @@ global, shallow, and deep RMS errors. The global MPAS-O and TPXO solutions are
132154plotted along with the spatial error fields. Below is an example of the type
133155of plots produced for the 5 major constituents.
134156
135- .. image :: images/M2_plot.png
157+ For the Icos7 mesh:
158+
159+ .. image :: images/M2_plot_icos7.png
160+ :width: 500px
161+ :align: center
162+
163+ And for the VR45to5 case:
164+
165+ .. image :: images/M2_plot_vr45to5.png
136166 :width: 500px
137167 :align: center
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