grid_check.ipynb

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    "# Grid checks\n",
    "- https://github.com/COSIMA/access-om3/issues/101\n",
    "- https://github.com/COSIMA/access-om2/issues/190\n",
    "- https://github.com/COSIMA/access-om2/issues/129\n",
    "- https://github.com/COSIMA/access-om2/issues/271"
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    "import xarray as xr\n",
    "import numpy as np"
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    "## 1 deg\n",
    "\n",
    "### CICE\n",
    "- ulon -278.99999784... 79.99999938\n",
    "- tlon -279.49999783... 79.49999938\n",
    "\n",
    "u points at NE corner\n",
    "\n",
    "**Both latitudes and longitudes differ slightly from MOM grid**\n",
    "- Were CICE coords converted from to single precision then back to double? Could explain https://github.com/COSIMA/access-om2/issues/271?\n",
    "\n",
    "### MOM supergrid\n",
    "- -280... 80"
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    "cice1_grid = xr.open_dataset('/g/data/ik11/inputs/access-om3/0.x.0/1deg/cice/grid.nc')\n",
    "np.rad2deg(cice1_grid.ulon.isel(ny=0).values)"
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       "</style><pre class='xr-text-repr-fallback'>&lt;xarray.Dataset&gt;\n",
       "Dimensions:     (ny: 300, nx: 360, nc: 4)\n",
       "Dimensions without coordinates: ny, nx, nc\n",
       "Data variables: (12/16)\n",
       "    ulat        (ny, nx) float64 ...\n",
       "    ulon        (ny, nx) float64 ...\n",
       "    tlat        (ny, nx) float64 ...\n",
       "    tlon        (ny, nx) float64 ...\n",
       "    htn         (ny, nx) float64 ...\n",
       "    hte         (ny, nx) float64 ...\n",
       "    ...          ...\n",
       "    tarea       (ny, nx) float64 ...\n",
       "    uarea       (ny, nx) float64 ...\n",
       "    lont_bonds  (nc, ny, nx) float64 ...\n",
       "    latt_bonds  (nc, ny, nx) float64 ...\n",
       "    lonu_bonds  (nc, ny, nx) float64 ...\n",
       "    latu_bonds  (nc, ny, nx) float64 ...</pre><div class='xr-wrap' style='display:none'><div class='xr-header'><div class='xr-obj-type'>xarray.Dataset</div></div><ul class='xr-sections'><li class='xr-section-item'><input id='section-5dda321f-e3b6-434c-b48f-fbb94a2b734c' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-5dda321f-e3b6-434c-b48f-fbb94a2b734c' class='xr-section-summary'  title='Expand/collapse section'>Dimensions:</label><div class='xr-section-inline-details'><ul class='xr-dim-list'><li><span>ny</span>: 300</li><li><span>nx</span>: 360</li><li><span>nc</span>: 4</li></ul></div><div class='xr-section-details'></div></li><li class='xr-section-item'><input id='section-0468425a-57c1-4c91-b0fe-38f4cd65d821' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-0468425a-57c1-4c91-b0fe-38f4cd65d821' class='xr-section-summary'  title='Expand/collapse section'>Coordinates: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'></ul></div></li><li class='xr-section-item'><input id='section-42245201-e26e-413e-a968-3eb940cbb4f1' class='xr-section-summary-in' type='checkbox'  ><label for='section-42245201-e26e-413e-a968-3eb940cbb4f1' class='xr-section-summary' >Data variables: <span>(16)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span>ulat</span></div><div class='xr-var-dims'>(ny, nx)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-610462bb-add2-4e9a-bf57-59dce08060a9' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-610462bb-add2-4e9a-bf57-59dce08060a9' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-5ef49179-5009-402c-96d5-0f1786298179' class='xr-var-data-in' type='checkbox'><label for='data-5ef49179-5009-402c-96d5-0f1786298179' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>units :</span></dt><dd>radians</dd><dt><span>title :</span></dt><dd>Latitude of U points</dd></dl></div><div class='xr-var-data'><pre>[108000 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>ulon</span></div><div class='xr-var-dims'>(ny, nx)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-81ede4e8-c6df-45e2-8885-20acf4e9d00f' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-81ede4e8-c6df-45e2-8885-20acf4e9d00f' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-6d267ccc-152f-4c42-8452-c769901016e0' class='xr-var-data-in' type='checkbox'><label for='data-6d267ccc-152f-4c42-8452-c769901016e0' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>units :</span></dt><dd>radians</dd><dt><span>title :</span></dt><dd>Longitude of U points</dd></dl></div><div class='xr-var-data'><pre>[108000 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>tlat</span></div><div class='xr-var-dims'>(ny, nx)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-4c28c4d9-0e47-48ac-ad1b-344af4ff8574' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-4c28c4d9-0e47-48ac-ad1b-344af4ff8574' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-b3b8c88a-af86-44f0-abbd-89f7dcc80b87' class='xr-var-data-in' type='checkbox'><label for='data-b3b8c88a-af86-44f0-abbd-89f7dcc80b87' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>units :</span></dt><dd>radians</dd><dt><span>title :</span></dt><dd>Latitude of T points</dd></dl></div><div class='xr-var-data'><pre>[108000 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>tlon</span></div><div class='xr-var-dims'>(ny, nx)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-a893ed32-d8dc-4a75-bb34-449b9461d4da' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-a893ed32-d8dc-4a75-bb34-449b9461d4da' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-30eee678-2406-4277-a324-ff0160c59206' class='xr-var-data-in' type='checkbox'><label for='data-30eee678-2406-4277-a324-ff0160c59206' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>units :</span></dt><dd>radians</dd><dt><span>title :</span></dt><dd>Longitude of T points</dd></dl></div><div class='xr-var-data'><pre>[108000 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>htn</span></div><div class='xr-var-dims'>(ny, nx)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-c9f52c59-142e-4e8b-ab5e-57cb268ed472' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-c9f52c59-142e-4e8b-ab5e-57cb268ed472' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-66a113d9-4bc3-4195-93e7-7f1be632790b' class='xr-var-data-in' type='checkbox'><label for='data-66a113d9-4bc3-4195-93e7-7f1be632790b' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>units :</span></dt><dd>cm</dd><dt><span>title :</span></dt><dd>Width of T cells on N side</dd></dl></div><div class='xr-var-data'><pre>[108000 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>hte</span></div><div class='xr-var-dims'>(ny, nx)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-345b0a18-911d-4f04-819e-3b432313fbea' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-345b0a18-911d-4f04-819e-3b432313fbea' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-ef6598db-62ce-4b62-9c4e-cfc2796ad143' class='xr-var-data-in' type='checkbox'><label for='data-ef6598db-62ce-4b62-9c4e-cfc2796ad143' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>units :</span></dt><dd>cm</dd><dt><span>title :</span></dt><dd>Width of T cells on E side</dd></dl></div><div class='xr-var-data'><pre>[108000 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>hun</span></div><div class='xr-var-dims'>(ny, nx)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-87fdebf7-a755-4684-b1e3-9822965ac7d8' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-87fdebf7-a755-4684-b1e3-9822965ac7d8' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-6d5ce671-d656-4755-8226-4f7272bf4133' class='xr-var-data-in' type='checkbox'><label for='data-6d5ce671-d656-4755-8226-4f7272bf4133' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>units :</span></dt><dd>cm</dd><dt><span>title :</span></dt><dd>Width of U cells on N side</dd></dl></div><div class='xr-var-data'><pre>[108000 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>hue</span></div><div class='xr-var-dims'>(ny, nx)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-ec3f7ff0-bb62-4d71-85e0-50aa193c78da' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-ec3f7ff0-bb62-4d71-85e0-50aa193c78da' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-39efa199-d1d0-4e56-b80b-95f52e59c6da' class='xr-var-data-in' type='checkbox'><label for='data-39efa199-d1d0-4e56-b80b-95f52e59c6da' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>units :</span></dt><dd>cm</dd><dt><span>title :</span></dt><dd>Width of U cells on E side</dd></dl></div><div class='xr-var-data'><pre>[108000 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>angle</span></div><div class='xr-var-dims'>(ny, nx)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-586cfd00-c67b-402b-88e7-faacf7ff40eb' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-586cfd00-c67b-402b-88e7-faacf7ff40eb' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-a068b2df-5ba1-4104-95e3-ac63768c945f' class='xr-var-data-in' type='checkbox'><label for='data-a068b2df-5ba1-4104-95e3-ac63768c945f' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>units :</span></dt><dd>radians</dd><dt><span>title :</span></dt><dd>Rotation Angle of U cells</dd></dl></div><div class='xr-var-data'><pre>[108000 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>angleT</span></div><div class='xr-var-dims'>(ny, nx)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-e25e622b-b3f9-4fe8-a198-02de9e88c124' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-e25e622b-b3f9-4fe8-a198-02de9e88c124' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-4ed6df7e-3542-483f-9784-8cee2f760bc6' class='xr-var-data-in' type='checkbox'><label for='data-4ed6df7e-3542-483f-9784-8cee2f760bc6' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>units :</span></dt><dd>radians</dd><dt><span>title :</span></dt><dd>Rotation Angle of T cells</dd></dl></div><div class='xr-var-data'><pre>[108000 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>tarea</span></div><div class='xr-var-dims'>(ny, nx)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-ccc8dbbb-2239-4905-85cf-f6631648d4e5' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-ccc8dbbb-2239-4905-85cf-f6631648d4e5' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-4a407550-b50a-4d09-9a3b-61427a0ffb5c' class='xr-var-data-in' type='checkbox'><label for='data-4a407550-b50a-4d09-9a3b-61427a0ffb5c' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>units :</span></dt><dd>m^2</dd><dt><span>title :</span></dt><dd>area in m^2 for T cells</dd></dl></div><div class='xr-var-data'><pre>[108000 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>uarea</span></div><div class='xr-var-dims'>(ny, nx)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-eb84cb8b-df85-4d6e-8bd9-73154faebfaf' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-eb84cb8b-df85-4d6e-8bd9-73154faebfaf' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-8d0c6950-3471-4e15-8265-895d90f537f5' class='xr-var-data-in' type='checkbox'><label for='data-8d0c6950-3471-4e15-8265-895d90f537f5' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>units :</span></dt><dd>m^2</dd><dt><span>title :</span></dt><dd>area in m^2 for U cells</dd></dl></div><div class='xr-var-data'><pre>[108000 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>lont_bonds</span></div><div class='xr-var-dims'>(nc, ny, nx)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-09c871ae-ce5a-4063-8e9a-0b556defba84' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-09c871ae-ce5a-4063-8e9a-0b556defba84' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-57998643-8400-4f07-bb66-9a6c0f9f1e68' class='xr-var-data-in' type='checkbox'><label for='data-57998643-8400-4f07-bb66-9a6c0f9f1e68' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>units :</span></dt><dd>radians</dd><dt><span>title :</span></dt><dd>long. of T cell vertices</dd></dl></div><div class='xr-var-data'><pre>[432000 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>latt_bonds</span></div><div class='xr-var-dims'>(nc, ny, nx)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-4108525f-86ec-4132-9826-984ce8df04af' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-4108525f-86ec-4132-9826-984ce8df04af' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-ce264511-1c8c-415a-9368-b495b494515f' class='xr-var-data-in' type='checkbox'><label for='data-ce264511-1c8c-415a-9368-b495b494515f' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>units :</span></dt><dd>radians</dd><dt><span>title :</span></dt><dd>lat. of T cell vertices</dd></dl></div><div class='xr-var-data'><pre>[432000 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>lonu_bonds</span></div><div class='xr-var-dims'>(nc, ny, nx)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-f7b21ad0-965d-457f-a21b-bc60c560d106' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-f7b21ad0-965d-457f-a21b-bc60c560d106' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-92f7772f-4605-497d-a464-971e6ab59454' class='xr-var-data-in' type='checkbox'><label for='data-92f7772f-4605-497d-a464-971e6ab59454' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>units :</span></dt><dd>radians</dd><dt><span>title :</span></dt><dd>long. of U cell vertices</dd></dl></div><div class='xr-var-data'><pre>[432000 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>latu_bonds</span></div><div class='xr-var-dims'>(nc, ny, nx)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-d26e69db-e1c1-40a6-8b61-6682b3eeb0a3' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-d26e69db-e1c1-40a6-8b61-6682b3eeb0a3' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-f4592a39-9028-497e-b015-b0be8d875b6c' class='xr-var-data-in' type='checkbox'><label for='data-f4592a39-9028-497e-b015-b0be8d875b6c' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>units :</span></dt><dd>radians</dd><dt><span>title :</span></dt><dd>lat. of U cell vertices</dd></dl></div><div class='xr-var-data'><pre>[432000 values with dtype=float64]</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-abe2591a-a163-4022-b27a-1c02d94a94d8' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-abe2591a-a163-4022-b27a-1c02d94a94d8' class='xr-section-summary'  title='Expand/collapse section'>Indexes: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'></ul></div></li><li class='xr-section-item'><input id='section-44247dc6-d829-45c8-b7aa-da0944481b98' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-44247dc6-d829-45c8-b7aa-da0944481b98' class='xr-section-summary'  title='Expand/collapse section'>Attributes: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'></dl></div></li></ul></div></div>"
      ],
      "text/plain": [
       "<xarray.Dataset>\n",
       "Dimensions:     (ny: 300, nx: 360, nc: 4)\n",
       "Dimensions without coordinates: ny, nx, nc\n",
       "Data variables: (12/16)\n",
       "    ulat        (ny, nx) float64 ...\n",
       "    ulon        (ny, nx) float64 ...\n",
       "    tlat        (ny, nx) float64 ...\n",
       "    tlon        (ny, nx) float64 ...\n",
       "    htn         (ny, nx) float64 ...\n",
       "    hte         (ny, nx) float64 ...\n",
       "    ...          ...\n",
       "    tarea       (ny, nx) float64 ...\n",
       "    uarea       (ny, nx) float64 ...\n",
       "    lont_bonds  (nc, ny, nx) float64 ...\n",
       "    latt_bonds  (nc, ny, nx) float64 ...\n",
       "    lonu_bonds  (nc, ny, nx) float64 ...\n",
       "    latu_bonds  (nc, ny, nx) float64 ..."
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "cice1_grid"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "id": "77d1621f-94c2-420b-a0bc-63026e6f1e0a",
   "metadata": {
    "collapsed": true,
    "jupyter": {
     "outputs_hidden": true
    }
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([-278.99999784, -277.99999785, -276.99999785, -275.99999786,\n",
       "       -274.99999787, -273.99999788, -272.99999789, -271.99999789,\n",
       "       -270.9999979 , -269.99999791, -268.99999792, -267.99999792,\n",
       "       -266.99999793, -265.99999794, -264.99999795, -263.99999795,\n",
       "       -262.99999796, -261.99999797, -260.99999798, -259.99999799,\n",
       "       -258.99999799, -257.999998  , -256.99999801, -255.99999802,\n",
       "       -254.99999802, -253.99999803, -252.99999804, -251.99999805,\n",
       "       -250.99999806, -249.99999806, -248.99999807, -247.99999808,\n",
       "       -246.99999809, -245.99999809, -244.9999981 , -243.99999811,\n",
       "       -242.99999812, -241.99999813, -240.99999813, -239.99999814,\n",
       "       -238.99999815, -237.99999816, -236.99999816, -235.99999817,\n",
       "       -234.99999818, -233.99999819, -232.9999982 , -231.9999982 ,\n",
       "       -230.99999821, -229.99999822, -228.99999823, -227.99999823,\n",
       "       -226.99999824, -225.99999825, -224.99999826, -223.99999826,\n",
       "       -222.99999827, -221.99999828, -220.99999829, -219.9999983 ,\n",
       "       -218.9999983 , -217.99999831, -216.99999832, -215.99999833,\n",
       "       -214.99999833, -213.99999834, -212.99999835, -211.99999836,\n",
       "       -210.99999837, -209.99999837, -208.99999838, -207.99999839,\n",
       "       -206.9999984 , -205.9999984 , -204.99999841, -203.99999842,\n",
       "       -202.99999843, -201.99999844, -200.99999844, -199.99999845,\n",
       "       -198.99999846, -197.99999847, -196.99999847, -195.99999848,\n",
       "       -194.99999849, -193.9999985 , -192.9999985 , -191.99999851,\n",
       "       -190.99999852, -189.99999853, -188.99999854, -187.99999854,\n",
       "       -186.99999855, -185.99999856, -184.99999857, -183.99999857,\n",
       "       -182.99999858, -181.99999859, -180.9999986 , -179.99999861,\n",
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       "         48.99999962,   49.99999961,   50.9999996 ,   51.9999996 ,\n",
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       "         56.99999956,   57.99999955,   58.99999954,   59.99999954,\n",
       "         60.99999953,   61.99999952,   62.99999951,   63.9999995 ,\n",
       "         64.9999995 ,   65.99999949,   66.99999948,   67.99999947,\n",
       "         68.99999947,   69.99999946,   70.99999945,   71.99999944,\n",
       "         72.99999943,   73.99999943,   74.99999942,   75.99999941,\n",
       "         76.9999994 ,   77.9999994 ,   78.99999939,   79.99999938])"
      ]
     },
     "execution_count": 16,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "om2cice1_grid = xr.open_dataset('/g/data/ik11/inputs/access-om2/input_20201102/cice_1deg/grid.nc')\n",
    "np.rad2deg(om2cice1_grid.ulon.isel(ny=0).values)"
   ]
  },
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       "         76.49999941,   77.4999994 ,   78.49999939,   79.49999938])"
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     },
     "execution_count": 15,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "np.rad2deg(om2cice1_grid.tlon.isel(ny=0).values)"
   ]
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  {
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       "          8. ,    8.5,    9. ,    9.5,   10. ,   10.5,   11. ,   11.5,\n",
       "         12. ,   12.5,   13. ,   13.5,   14. ,   14.5,   15. ,   15.5,\n",
       "         16. ,   16.5,   17. ,   17.5,   18. ,   18.5,   19. ,   19.5,\n",
       "         20. ,   20.5,   21. ,   21.5,   22. ,   22.5,   23. ,   23.5,\n",
       "         24. ,   24.5,   25. ,   25.5,   26. ,   26.5,   27. ,   27.5,\n",
       "         28. ,   28.5,   29. ,   29.5,   30. ,   30.5,   31. ,   31.5,\n",
       "         32. ,   32.5,   33. ,   33.5,   34. ,   34.5,   35. ,   35.5,\n",
       "         36. ,   36.5,   37. ,   37.5,   38. ,   38.5,   39. ,   39.5,\n",
       "         40. ,   40.5,   41. ,   41.5,   42. ,   42.5,   43. ,   43.5,\n",
       "         44. ,   44.5,   45. ,   45.5,   46. ,   46.5,   47. ,   47.5,\n",
       "         48. ,   48.5,   49. ,   49.5,   50. ,   50.5,   51. ,   51.5,\n",
       "         52. ,   52.5,   53. ,   53.5,   54. ,   54.5,   55. ,   55.5,\n",
       "         56. ,   56.5,   57. ,   57.5,   58. ,   58.5,   59. ,   59.5,\n",
       "         60. ,   60.5,   61. ,   61.5,   62. ,   62.5,   63. ,   63.5,\n",
       "         64. ,   64.5,   65. ,   65.5,   66. ,   66.5,   67. ,   67.5,\n",
       "         68. ,   68.5,   69. ,   69.5,   70. ,   70.5,   71. ,   71.5,\n",
       "         72. ,   72.5,   73. ,   73.5,   74. ,   74.5,   75. ,   75.5,\n",
       "         76. ,   76.5,   77. ,   77.5,   78. ,   78.5,   79. ,   79.5,\n",
       "         80. ])"
      ]
     },
     "execution_count": 24,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "om2mom1_grid = xr.open_dataset('/g/data/ik11/inputs/access-om2/input_20201102/mom_1deg/ocean_hgrid.nc')\n",
    "om2mom1_grid.x.isel(nyp=0).values"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 31,
   "id": "4367b2f6-455b-4556-899a-c8d6b7dfd989",
   "metadata": {
    "collapsed": true,
    "jupyter": {
     "outputs_hidden": true,
     "source_hidden": true
    },
    "scrolled": true
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
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       "        6.50000000e+01,  6.50000000e+01,  6.50000000e+01,  6.50000000e+01,\n",
       "        6.50000000e+01,  6.50000000e+01,  6.50000000e+01,  6.50000000e+01,\n",
       "        6.50000000e+01,  6.50000000e+01,  6.50000000e+01,  6.50000000e+01,\n",
       "        6.50000000e+01])"
      ]
     },
     "execution_count": 31,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "om2mom1_grid.y.isel(nxp=0).values"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "ebec76b7-200c-4318-bd1a-ad41f84ea0ce",
   "metadata": {},
   "source": [
    "## 0.25 deg\n",
    "\n",
    "### CICE\n",
    "- ulon -280... 79.75  **offset 1 cell to the west!**\n",
    "- tlon -279.875... 79.875\n",
    "\n",
    "**u points at NW corner!!**\n",
    "\n",
    "### MOM supergrid\n",
    "- -280...80"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 39,
   "id": "f2dcc0b5-948d-4342-b0d7-4c8f612d4ed7",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([-280.  , -279.75, -279.5 , ...,   79.25,   79.5 ,   79.75])"
      ]
     },
     "execution_count": 39,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# om2cice025_grid = xr.open_dataset('/g/data/ik11/inputs/access-om2/input_20201102/cice_025deg/grid.nc')\n",
    "om2cice025_grid = xr.open_dataset('/g/data/ik11/inputs/access-om2/input_20230515_025deg_topog/cice_025deg/grid.nc')\n",
    "np.rad2deg(om2cice025_grid.ulon.isel(ny=0).values)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 40,
   "id": "6f5a62b6-1bac-42b8-8e84-39d9ddffb60b",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([-279.875, -279.625, -279.375, ...,   79.375,   79.625,   79.875])"
      ]
     },
     "execution_count": 40,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "np.rad2deg(om2cice025_grid.tlon.isel(ny=0).values)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 41,
   "id": "328f76e9-ceeb-4bcc-8a29-aae8fec9aed1",
   "metadata": {
    "scrolled": true
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([-81.02420154, -80.91860295, -80.81300436, ...,  64.97313436,\n",
       "        64.97313436,  64.97313436])"
      ]
     },
     "execution_count": 41,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "np.rad2deg(om2cice025_grid.ulat.isel(nx=0).values)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 42,
   "id": "8cadf118-f076-4014-865d-149ef4085edb",
   "metadata": {
    "scrolled": true
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([-81.07700083, -80.97140224, -80.86580366, ...,  65.02595119,\n",
       "        65.02595847,  65.0259621 ])"
      ]
     },
     "execution_count": 42,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "np.rad2deg(om2cice025_grid.tlat.isel(nx=0).values)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 44,
   "id": "c14607b4-816f-4902-a6c9-05ad44b86ef4",
   "metadata": {
    "scrolled": true
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([-280.   , -279.875, -279.75 , ...,   79.75 ,   79.875,   80.   ])"
      ]
     },
     "execution_count": 44,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# om2mom025_grid = xr.open_dataset('/g/data/ik11/inputs/access-om2/input_20201102/mom_025deg/ocean_hgrid.nc')\n",
    "om2mom025_grid = xr.open_dataset('/g/data/ik11/inputs/access-om2/input_20230515_025deg_topog/mom_025deg/ocean_hgrid.nc')\n",
    "om2mom025_grid.x.isel(nyp=0).values"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 45,
   "id": "cba40688-35c7-423e-b8e3-2fc813056a1e",
   "metadata": {
    "scrolled": true
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([-81.12980013, -81.07700083, -81.02420154, ...,  64.97313436,\n",
       "        64.97313436,  64.97313436])"
      ]
     },
     "execution_count": 45,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "om2mom025_grid.y.isel(nxp=0).values"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "6d2b9693-8877-40b0-89f1-3fe3ed502366",
   "metadata": {},
   "source": [
    "## 0.1 deg\n",
    "\n",
    "### CICE\n",
    "- ulon -279.9... 80\n",
    "- tlon -279.95... 79.95\n",
    "\n",
    "u points at NE corner\n",
    "\n",
    "### MOM supergrid\n",
    "- -280...80"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "id": "dcc847a2-9191-4c72-a023-e31d0cf87495",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([-279.9, -279.8, -279.7, ...,   79.8,   79.9,   80. ])"
      ]
     },
     "execution_count": 26,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "om2cice01_grid = xr.open_dataset('/g/data/ik11/inputs/access-om2/input_20201102/cice_01deg/grid.nc')\n",
    "np.rad2deg(om2cice01_grid.ulon.isel(ny=0).values)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
   "id": "084fa975-a85a-41d4-8837-0ac4393cde3b",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([-279.95, -279.85, -279.75, ...,   79.75,   79.85,   79.95])"
      ]
     },
     "execution_count": 27,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "np.rad2deg(om2cice01_grid.tlon.isel(ny=0).values)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 34,
   "id": "29272430-9f26-4c97-8fef-fdc80aaf15f6",
   "metadata": {
    "scrolled": true
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([-81.087512  , -81.04527265, -81.00303329, ...,  65.03653872,\n",
       "        65.03653942,  65.03653965])"
      ]
     },
     "execution_count": 34,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "np.rad2deg(om2cice01_grid.ulat.isel(nx=0).values)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 35,
   "id": "fc3f9cfe-1fb0-466c-b666-ce26bae43863",
   "metadata": {
    "scrolled": true
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([-81.10863168, -81.06639232, -81.02415297, ...,  65.01542854,\n",
       "        65.01542901,  65.01542924])"
      ]
     },
     "execution_count": 35,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "np.rad2deg(om2cice01_grid.tlat.isel(nx=0).values)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "id": "3842e7f7-624f-4274-b03c-1f95ea45e5e4",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([-280.  , -279.95, -279.9 , ...,   79.9 ,   79.95,   80.  ])"
      ]
     },
     "execution_count": 28,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "om2mom01_grid = xr.open_dataset('/g/data/ik11/inputs/access-om2/input_20201102/mom_01deg/ocean_hgrid.nc')\n",
    "om2mom01_grid.x.isel(nyp=0).values"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 38,
   "id": "317e5c15-4311-42ba-aa52-8c2876725eac",
   "metadata": {
    "scrolled": true
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([-81.12975136, -81.10863168, -81.087512  , ...,  64.99430221,\n",
       "        64.99430221,  64.99430221])"
      ]
     },
     "execution_count": 38,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "om2mom01_grid.y.isel(nxp=0).values"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "581179a8-f092-4c2d-b750-117d0d33eec2",
   "metadata": {},
   "outputs": [],
   "source": []
  }
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