Investigating_biochem_metrics.ipynb

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   "source": [
    "import xarray as xr\n",
    "import getpass\n",
    "from pydap.client import open_url\n",
    "from pydap.cas.get_cookies import setup_session"
   ]
  },
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   "source": [
    "## OPeNDAP for Copernicus data"
   ]
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    {
     "name": "stdin",
     "output_type": "stream",
     "text": [
      "Enter your password:  ········\n"
     ]
    }
   ],
   "source": [
    "USERNAME = 'mphan'\n",
    "PASSWORD = getpass.getpass('Enter your password: ')"
   ]
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   "source": [
    "# change your Dataset ID accordingly\n",
    "DATASET_ID = 'global-analysis-forecast-bio-001-028-daily'"
   ]
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   "source": [
    "def copernicusmarine_datastore(dataset, username, password):\n",
    "    cas_url = 'https://cmems-cas.cls.fr/cas/login'\n",
    "    session = setup_session(cas_url, username, password)\n",
    "    try:\n",
    "        session.cookies.set(\"CASTGC\", session.cookies.get_dict()['CASTGC'])\n",
    "    except:\n",
    "        print(\"Bad credentials. Please try again.\")\n",
    "    database = ['my', 'nrt']\n",
    "    url = f'https://{database[0]}.cmems-du.eu/thredds/dodsC/{dataset}'\n",
    "\n",
    "    try:\n",
    "        data_store = xr.backends.PydapDataStore(open_url(url, session=session, user_charset='utf-8')) # needs PyDAP >= v3.3.0 see https://github.com/pydap/pydap/pull/223/commits \n",
    "    except:\n",
    "        url = f'https://{database[1]}.cmems-du.eu/thredds/dodsC/{dataset}'\n",
    "        data_store = xr.backends.PydapDataStore(open_url(url, session=session, user_charset='utf-8')) # needs PyDAP >= v3.3.0 see https://github.com/pydap/pydap/pull/223/commits\n",
    "    \n",
    "    return data_store"
   ]
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  {
   "cell_type": "code",
   "execution_count": 16,
   "id": "40052d0a-31d7-4654-913d-52c2ae3efd9e",
   "metadata": {
    "tags": []
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   "source": [
    "data_store = copernicusmarine_datastore(DATASET_ID, USERNAME, PASSWORD)"
   ]
  },
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   "cell_type": "code",
   "execution_count": 17,
   "id": "4d20bb07-4820-4ff2-a70d-95913dbfc92d",
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   "outputs": [],
   "source": [
    "DS = xr.open_dataset(data_store)"
   ]
  },
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   "execution_count": 18,
   "id": "caf58890-f3b6-4312-a2eb-1fb36fc10cc2",
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       "</style><pre class='xr-text-repr-fallback'>&lt;xarray.Dataset&gt;\n",
       "Dimensions:    (longitude: 1440, latitude: 681, depth: 50, time: 1021)\n",
       "Coordinates:\n",
       "  * longitude  (longitude) float32 -180.0 -179.8 -179.5 ... 179.2 179.5 179.8\n",
       "  * latitude   (latitude) float32 -80.0 -79.75 -79.5 -79.25 ... 89.5 89.75 90.0\n",
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       "  * time       (time) datetime64[ns] 2020-11-01T12:00:00 ... 2023-08-18T12:00:00\n",
       "Data variables:\n",
       "    talk       (time, depth, latitude, longitude) float32 ...\n",
       "    chl        (time, depth, latitude, longitude) float32 ...\n",
       "    dissic     (time, depth, latitude, longitude) float32 ...\n",
       "    fe         (time, depth, latitude, longitude) float32 ...\n",
       "    no3        (time, depth, latitude, longitude) float32 ...\n",
       "    nppv       (time, depth, latitude, longitude) float32 ...\n",
       "    o2         (time, depth, latitude, longitude) float32 ...\n",
       "    ph         (time, depth, latitude, longitude) float32 ...\n",
       "    phyc       (time, depth, latitude, longitude) float32 ...\n",
       "    po4        (time, depth, latitude, longitude) float32 ...\n",
       "    si         (time, depth, latitude, longitude) float32 ...\n",
       "    spco2      (time, latitude, longitude) float32 ...\n",
       "Attributes: (12/16)\n",
       "    product:                       GLOBAL_ANALYSIS_FORECAST_BIO_001_028\n",
       "    producer:                      CMEMS - Global Monitoring and Forecasting ...\n",
       "    title:                         daily mean fields from Global Ocean Biogeo...\n",
       "    area:                          GLOBAL\n",
       "    quality_information_document:  http://marine.copernicus.eu/documents/QUID...\n",
       "    Conventions:                   CF-1.6\n",
       "    ...                            ...\n",
       "    licence:                       http://marine.copernicus.eu/services-portf...\n",
       "    dataset:                       global-analysis-forecast-bio-001-028-daily\n",
       "    institution:                   Mercator Ocean\n",
       "    product_user_manual:           http://marine.copernicus.eu/documents/PUM/...\n",
       "    forecast_type:                 forecast\n",
       "    bulletin_date:                 2023-08-09 00:00:00</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-4cafa1a5-07e4-42cc-8d84-cd4c265e9de6' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-4cafa1a5-07e4-42cc-8d84-cd4c265e9de6' class='xr-section-summary'  title='Expand/collapse section'>Dimensions:</label><div class='xr-section-inline-details'><ul class='xr-dim-list'><li><span class='xr-has-index'>longitude</span>: 1440</li><li><span class='xr-has-index'>latitude</span>: 681</li><li><span class='xr-has-index'>depth</span>: 50</li><li><span class='xr-has-index'>time</span>: 1021</li></ul></div><div class='xr-section-details'></div></li><li class='xr-section-item'><input id='section-35a5f0a9-7271-456e-9244-16c1d0fc0729' class='xr-section-summary-in' type='checkbox'  checked><label for='section-35a5f0a9-7271-456e-9244-16c1d0fc0729' class='xr-section-summary' >Coordinates: <span>(4)</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 class='xr-has-index'>longitude</span></div><div class='xr-var-dims'>(longitude)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>-180.0 -179.8 ... 179.5 179.8</div><input id='attrs-58c13d52-9f49-4685-a44c-fd94887aed81' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-58c13d52-9f49-4685-a44c-fd94887aed81' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-2327891f-f18d-45c3-834e-e0da24dcc261' class='xr-var-data-in' type='checkbox'><label for='data-2327891f-f18d-45c3-834e-e0da24dcc261' 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>valid_min :</span></dt><dd>-180.0</dd><dt><span>valid_max :</span></dt><dd>179.75</dd><dt><span>step :</span></dt><dd>0.25</dd><dt><span>units :</span></dt><dd>degrees_east</dd><dt><span>unit_long :</span></dt><dd>Degrees East</dd><dt><span>long_name :</span></dt><dd>Longitude</dd><dt><span>standard_name :</span></dt><dd>longitude</dd><dt><span>axis :</span></dt><dd>X</dd><dt><span>_ChunkSizes :</span></dt><dd>1440</dd></dl></div><div class='xr-var-data'><pre>array([-180.  , -179.75, -179.5 , ...,  179.25,  179.5 ,  179.75],\n",
       "      dtype=float32)</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>latitude</span></div><div class='xr-var-dims'>(latitude)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>-80.0 -79.75 -79.5 ... 89.75 90.0</div><input id='attrs-576b707d-ab8a-4850-8dd2-b3ff52d1e543' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-576b707d-ab8a-4850-8dd2-b3ff52d1e543' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-26f93841-575b-48e8-b5fb-7472d5eaa27b' class='xr-var-data-in' type='checkbox'><label for='data-26f93841-575b-48e8-b5fb-7472d5eaa27b' 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>valid_min :</span></dt><dd>-80.0</dd><dt><span>valid_max :</span></dt><dd>90.0</dd><dt><span>step :</span></dt><dd>0.25</dd><dt><span>units :</span></dt><dd>degrees_north</dd><dt><span>unit_long :</span></dt><dd>Degrees North</dd><dt><span>long_name :</span></dt><dd>Latitude</dd><dt><span>standard_name :</span></dt><dd>latitude</dd><dt><span>axis :</span></dt><dd>Y</dd><dt><span>_ChunkSizes :</span></dt><dd>681</dd></dl></div><div class='xr-var-data'><pre>array([-80.  , -79.75, -79.5 , ...,  89.5 ,  89.75,  90.  ], dtype=float32)</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>depth</span></div><div class='xr-var-dims'>(depth)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>0.494 1.541 ... 5.275e+03 5.728e+03</div><input id='attrs-3c957dc1-efc1-46ac-b9fb-8de0296588a3' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-3c957dc1-efc1-46ac-b9fb-8de0296588a3' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-91dbfea3-6080-413b-b003-b2a1b66446e6' class='xr-var-data-in' type='checkbox'><label for='data-91dbfea3-6080-413b-b003-b2a1b66446e6' 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</dd><dt><span>positive :</span></dt><dd>down</dd><dt><span>unit_long :</span></dt><dd>Meters</dd><dt><span>long_name :</span></dt><dd>Depth</dd><dt><span>standard_name :</span></dt><dd>depth</dd><dt><span>axis :</span></dt><dd>Z</dd><dt><span>_ChunkSizes :</span></dt><dd>50</dd></dl></div><div class='xr-var-data'><pre>array([4.940250e-01, 1.541375e+00, 2.645669e+00, 3.819495e+00, 5.078224e+00,\n",
       "       6.440614e+00, 7.929560e+00, 9.572997e+00, 1.140500e+01, 1.346714e+01,\n",
       "       1.581007e+01, 1.849556e+01, 2.159882e+01, 2.521141e+01, 2.944473e+01,\n",
       "       3.443415e+01, 4.034405e+01, 4.737369e+01, 5.576429e+01, 6.580727e+01,\n",
       "       7.785385e+01, 9.232607e+01, 1.097293e+02, 1.306660e+02, 1.558507e+02,\n",
       "       1.861256e+02, 2.224752e+02, 2.660403e+02, 3.181274e+02, 3.802130e+02,\n",
       "       4.539377e+02, 5.410889e+02, 6.435668e+02, 7.633331e+02, 9.023393e+02,\n",
       "       1.062440e+03, 1.245291e+03, 1.452251e+03, 1.684284e+03, 1.941893e+03,\n",
       "       2.225078e+03, 2.533336e+03, 2.865703e+03, 3.220820e+03, 3.597032e+03,\n",
       "       3.992484e+03, 4.405224e+03, 4.833291e+03, 5.274784e+03, 5.727917e+03],\n",
       "      dtype=float32)</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>time</span></div><div class='xr-var-dims'>(time)</div><div class='xr-var-dtype'>datetime64[ns]</div><div class='xr-var-preview xr-preview'>2020-11-01T12:00:00 ... 2023-08-...</div><input id='attrs-c42584ae-ed9d-404c-b16c-b8bd1d87b55f' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-c42584ae-ed9d-404c-b16c-b8bd1d87b55f' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-231a23b0-39e6-44a3-8d84-cce065e40279' class='xr-var-data-in' type='checkbox'><label for='data-231a23b0-39e6-44a3-8d84-cce065e40279' 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>long_name :</span></dt><dd>Time (hours since 1950-01-01)</dd><dt><span>standard_name :</span></dt><dd>time</dd><dt><span>axis :</span></dt><dd>T</dd><dt><span>_ChunkSizes :</span></dt><dd>1</dd></dl></div><div class='xr-var-data'><pre>array([&#x27;2020-11-01T12:00:00.000000000&#x27;, &#x27;2020-11-02T12:00:00.000000000&#x27;,\n",
       "       &#x27;2020-11-03T12:00:00.000000000&#x27;, ..., &#x27;2023-08-16T12:00:00.000000000&#x27;,\n",
       "       &#x27;2023-08-17T12:00:00.000000000&#x27;, &#x27;2023-08-18T12:00:00.000000000&#x27;],\n",
       "      dtype=&#x27;datetime64[ns]&#x27;)</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-b874314e-b177-48f9-8409-b29710a37618' class='xr-section-summary-in' type='checkbox'  checked><label for='section-b874314e-b177-48f9-8409-b29710a37618' class='xr-section-summary' >Data variables: <span>(12)</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>talk</span></div><div class='xr-var-dims'>(time, depth, latitude, longitude)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-8a947fff-70a0-4117-9840-67107e2ee5f7' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-8a947fff-70a0-4117-9840-67107e2ee5f7' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-4c3d3780-f59c-4022-9942-61e0d14b0265' class='xr-var-data-in' type='checkbox'><label for='data-4c3d3780-f59c-4022-9942-61e0d14b0265' 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>long_name :</span></dt><dd>Total Alkalinity</dd><dt><span>standard_name :</span></dt><dd>sea_water_alkalinity_expressed_as_mole_equivalent</dd><dt><span>units :</span></dt><dd>mol m-3</dd><dt><span>unit_long :</span></dt><dd>moles per cubic meter</dd><dt><span>valid_min :</span></dt><dd>0.10206958</dd><dt><span>valid_max :</span></dt><dd>4.3739696</dd><dt><span>_ChunkSizes :</span></dt><dd>[1, 13, 171, 360]</dd></dl></div><div class='xr-var-data'><pre>[50061672000 values with dtype=float32]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>chl</span></div><div class='xr-var-dims'>(time, depth, latitude, longitude)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-5e87f27a-bd29-4c1f-86af-5968ecc8526e' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-5e87f27a-bd29-4c1f-86af-5968ecc8526e' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-0c67345d-2df6-4d1f-8890-85b82ade020f' class='xr-var-data-in' type='checkbox'><label for='data-0c67345d-2df6-4d1f-8890-85b82ade020f' 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>long_name :</span></dt><dd>Total Chlorophyll</dd><dt><span>standard_name :</span></dt><dd>mass_concentration_of_chlorophyll_a_in_sea_water</dd><dt><span>units :</span></dt><dd>mg m-3</dd><dt><span>unit_long :</span></dt><dd>milligram of Chlorophyll per cubic meter</dd><dt><span>valid_min :</span></dt><dd>0.0021061325</dd><dt><span>valid_max :</span></dt><dd>26.14719</dd><dt><span>_ChunkSizes :</span></dt><dd>[1, 13, 171, 360]</dd></dl></div><div class='xr-var-data'><pre>[50061672000 values with dtype=float32]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>dissic</span></div><div class='xr-var-dims'>(time, depth, latitude, longitude)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-540e0edc-2c73-4cce-a380-7354023fa11c' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-540e0edc-2c73-4cce-a380-7354023fa11c' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-fb19724c-269e-47e2-8ad6-2c379335ae8b' class='xr-var-data-in' type='checkbox'><label for='data-fb19724c-269e-47e2-8ad6-2c379335ae8b' 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>long_name :</span></dt><dd>Dissolved Inorganic Carbon</dd><dt><span>standard_name :</span></dt><dd>mole_concentration_of_dissolved_inorganic_carbon_in_sea_water</dd><dt><span>units :</span></dt><dd>mol m-3</dd><dt><span>unit_long :</span></dt><dd>moles of DIC per cubic meter</dd><dt><span>valid_min :</span></dt><dd>0.105905935</dd><dt><span>valid_max :</span></dt><dd>4.309212</dd><dt><span>_ChunkSizes :</span></dt><dd>[1, 13, 171, 360]</dd></dl></div><div class='xr-var-data'><pre>[50061672000 values with dtype=float32]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>fe</span></div><div class='xr-var-dims'>(time, depth, latitude, longitude)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-7af46393-b0ba-4342-b126-6eb6c8dd9007' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-7af46393-b0ba-4342-b126-6eb6c8dd9007' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-e8015a3b-6f93-446d-86bb-2ca554583e02' class='xr-var-data-in' type='checkbox'><label for='data-e8015a3b-6f93-446d-86bb-2ca554583e02' 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>long_name :</span></dt><dd>Dissolved Iron</dd><dt><span>standard_name :</span></dt><dd>mole_concentration_of_dissolved_iron_in_sea_water</dd><dt><span>units :</span></dt><dd>mmol m-3</dd><dt><span>unit_long :</span></dt><dd>millimoles per cubic meter</dd><dt><span>valid_min :</span></dt><dd>4.9966607e-06</dd><dt><span>valid_max :</span></dt><dd>0.10825735</dd><dt><span>_ChunkSizes :</span></dt><dd>[1, 13, 171, 360]</dd></dl></div><div class='xr-var-data'><pre>[50061672000 values with dtype=float32]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>no3</span></div><div class='xr-var-dims'>(time, depth, latitude, longitude)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-dd5a3870-d539-48cf-94b3-5dd3debb249b' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-dd5a3870-d539-48cf-94b3-5dd3debb249b' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-22f89c4b-eecd-4d45-b866-117342f78dee' class='xr-var-data-in' type='checkbox'><label for='data-22f89c4b-eecd-4d45-b866-117342f78dee' 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>long_name :</span></dt><dd>Nitrate</dd><dt><span>standard_name :</span></dt><dd>mole_concentration_of_nitrate_in_sea_water</dd><dt><span>units :</span></dt><dd>mmol m-3</dd><dt><span>unit_long :</span></dt><dd>millimoles of Nitrate per cubic meter</dd><dt><span>valid_min :</span></dt><dd>9.469947e-21</dd><dt><span>valid_max :</span></dt><dd>88.88676</dd><dt><span>_ChunkSizes :</span></dt><dd>[1, 13, 171, 360]</dd></dl></div><div class='xr-var-data'><pre>[50061672000 values with dtype=float32]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>nppv</span></div><div class='xr-var-dims'>(time, depth, latitude, longitude)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-671af367-89f1-436c-976e-b8e19029fc44' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-671af367-89f1-436c-976e-b8e19029fc44' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-27dd9b47-7e4d-4a56-8eac-be3c0f4d5420' class='xr-var-data-in' type='checkbox'><label for='data-27dd9b47-7e4d-4a56-8eac-be3c0f4d5420' 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>long_name :</span></dt><dd>Total Primary Production of Phyto</dd><dt><span>standard_name :</span></dt><dd>net_primary_production_of_biomass_expressed_as_carbon_per_unit_volume_in_sea_water</dd><dt><span>units :</span></dt><dd>mg m-3 day-1</dd><dt><span>unit_long :</span></dt><dd>milligrams of Carbon per cubic meter per day</dd><dt><span>valid_min :</span></dt><dd>0.0</dd><dt><span>valid_max :</span></dt><dd>1989.8501</dd><dt><span>_ChunkSizes :</span></dt><dd>[1, 13, 171, 360]</dd></dl></div><div class='xr-var-data'><pre>[50061672000 values with dtype=float32]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>o2</span></div><div class='xr-var-dims'>(time, depth, latitude, longitude)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-84ecdad1-f59d-49cc-adac-255a3427891c' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-84ecdad1-f59d-49cc-adac-255a3427891c' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-e457198d-9526-45a4-8ef3-9596375a10ab' class='xr-var-data-in' type='checkbox'><label for='data-e457198d-9526-45a4-8ef3-9596375a10ab' 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>long_name :</span></dt><dd>Dissolved Oxygen</dd><dt><span>standard_name :</span></dt><dd>mole_concentration_of_dissolved_molecular_oxygen_in_sea_water</dd><dt><span>units :</span></dt><dd>mmol m-3</dd><dt><span>unit_long :</span></dt><dd>millimoles of Oxygen per cubic meter</dd><dt><span>valid_min :</span></dt><dd>0.06387986</dd><dt><span>valid_max :</span></dt><dd>458.2253</dd><dt><span>_ChunkSizes :</span></dt><dd>[1, 13, 171, 360]</dd></dl></div><div class='xr-var-data'><pre>[50061672000 values with dtype=float32]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>ph</span></div><div class='xr-var-dims'>(time, depth, latitude, longitude)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-8d9d8c5f-5558-43fb-93a7-2b9bfce6588f' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-8d9d8c5f-5558-43fb-93a7-2b9bfce6588f' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-33b588f7-e78d-45bd-9b15-05a92594bc53' class='xr-var-data-in' type='checkbox'><label for='data-33b588f7-e78d-45bd-9b15-05a92594bc53' 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>long_name :</span></dt><dd>PH</dd><dt><span>standard_name :</span></dt><dd>sea_water_ph_reported_on_total_scale</dd><dt><span>units :</span></dt><dd>1</dd><dt><span>unit_long :</span></dt><dd>1</dd><dt><span>valid_min :</span></dt><dd>6.9605403</dd><dt><span>valid_max :</span></dt><dd>8.629645</dd><dt><span>_ChunkSizes :</span></dt><dd>[1, 13, 171, 360]</dd></dl></div><div class='xr-var-data'><pre>[50061672000 values with dtype=float32]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>phyc</span></div><div class='xr-var-dims'>(time, depth, latitude, longitude)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-1612a596-9ee2-42cb-9bc4-bf6fe5fa7d18' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-1612a596-9ee2-42cb-9bc4-bf6fe5fa7d18' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-5d7e4888-91ce-4df3-b8d0-5c4834f5798d' class='xr-var-data-in' type='checkbox'><label for='data-5d7e4888-91ce-4df3-b8d0-5c4834f5798d' 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>long_name :</span></dt><dd>Total Phytoplankton</dd><dt><span>standard_name :</span></dt><dd>mole_concentration_of_phytoplankton_expressed_as_carbon_in_sea_water</dd><dt><span>units :</span></dt><dd>mmol m-3</dd><dt><span>unit_long :</span></dt><dd>millimoles per cubic meter</dd><dt><span>valid_min :</span></dt><dd>2.6153577e-07</dd><dt><span>valid_max :</span></dt><dd>87.729256</dd><dt><span>_ChunkSizes :</span></dt><dd>[1, 13, 171, 360]</dd></dl></div><div class='xr-var-data'><pre>[50061672000 values with dtype=float32]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>po4</span></div><div class='xr-var-dims'>(time, depth, latitude, longitude)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-3901c450-9b32-4b68-b4bc-a3be0f9a6593' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-3901c450-9b32-4b68-b4bc-a3be0f9a6593' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-fa49b83a-d936-4a60-b4af-b8e721884ef9' class='xr-var-data-in' type='checkbox'><label for='data-fa49b83a-d936-4a60-b4af-b8e721884ef9' 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>long_name :</span></dt><dd>Phosphate</dd><dt><span>standard_name :</span></dt><dd>mole_concentration_of_phosphate_in_sea_water</dd><dt><span>units :</span></dt><dd>mmol m-3</dd><dt><span>unit_long :</span></dt><dd>millimoles of Phosphate per cubic meter</dd><dt><span>valid_min :</span></dt><dd>3.205057e-05</dd><dt><span>valid_max :</span></dt><dd>10.222173</dd><dt><span>_ChunkSizes :</span></dt><dd>[1, 13, 171, 360]</dd></dl></div><div class='xr-var-data'><pre>[50061672000 values with dtype=float32]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>si</span></div><div class='xr-var-dims'>(time, depth, latitude, longitude)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-a5c36bad-6fdc-424d-ac1e-ff8b870e232c' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-a5c36bad-6fdc-424d-ac1e-ff8b870e232c' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-3eb6bdfe-34d5-4839-87bf-f1e735cb7ab0' class='xr-var-data-in' type='checkbox'><label for='data-3eb6bdfe-34d5-4839-87bf-f1e735cb7ab0' 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>long_name :</span></dt><dd>Dissolved Silicate</dd><dt><span>standard_name :</span></dt><dd>mole_concentration_of_silicate_in_sea_water</dd><dt><span>units :</span></dt><dd>mmol m-3</dd><dt><span>unit_long :</span></dt><dd>millimoles of Silicate per cubic meter</dd><dt><span>valid_min :</span></dt><dd>0.3677379</dd><dt><span>valid_max :</span></dt><dd>295.5388</dd><dt><span>_ChunkSizes :</span></dt><dd>[1, 13, 171, 360]</dd></dl></div><div class='xr-var-data'><pre>[50061672000 values with dtype=float32]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>spco2</span></div><div class='xr-var-dims'>(time, latitude, longitude)</div><div class='xr-var-dtype'>float32</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-8076b280-cdaf-4666-bafb-47f4525d9902' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-8076b280-cdaf-4666-bafb-47f4525d9902' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-87fc3a95-c3ef-4501-a99c-f4a88620de1e' class='xr-var-data-in' type='checkbox'><label for='data-87fc3a95-c3ef-4501-a99c-f4a88620de1e' 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>long_name :</span></dt><dd>surface CO2</dd><dt><span>standard_name :</span></dt><dd>surface_partial_pressure_of_carbon_dioxide_in_sea_water</dd><dt><span>units :</span></dt><dd>Pa</dd><dt><span>unit_long :</span></dt><dd>Pascal</dd><dt><span>valid_min :</span></dt><dd>5.9436107</dd><dt><span>valid_max :</span></dt><dd>916.9476</dd><dt><span>_ChunkSizes :</span></dt><dd>[1, 681, 1440]</dd></dl></div><div class='xr-var-data'><pre>[1001233440 values with dtype=float32]</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-4f19c0eb-3cd9-42ee-b162-a54a5a280444' class='xr-section-summary-in' type='checkbox'  ><label for='section-4f19c0eb-3cd9-42ee-b162-a54a5a280444' class='xr-section-summary' >Indexes: <span>(4)</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-index-name'><div>longitude</div></div><div class='xr-index-preview'>PandasIndex</div><div></div><input id='index-4b478d1a-5a27-4754-81b5-c7084c1b479d' class='xr-index-data-in' type='checkbox'/><label for='index-4b478d1a-5a27-4754-81b5-c7084c1b479d' title='Show/Hide index repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-index-data'><pre>PandasIndex(Index([ -180.0, -179.75,  -179.5, -179.25,  -179.0, -178.75,  -178.5, -178.25,\n",
       "        -178.0, -177.75,\n",
       "       ...\n",
       "         177.5,  177.75,   178.0,  178.25,   178.5,  178.75,   179.0,  179.25,\n",
       "         179.5,  179.75],\n",
       "      dtype=&#x27;float32&#x27;, name=&#x27;longitude&#x27;, length=1440))</pre></div></li><li class='xr-var-item'><div class='xr-index-name'><div>latitude</div></div><div class='xr-index-preview'>PandasIndex</div><div></div><input id='index-aecf9bce-dfd2-4e77-9eb1-8aebe94637e8' class='xr-index-data-in' type='checkbox'/><label for='index-aecf9bce-dfd2-4e77-9eb1-8aebe94637e8' title='Show/Hide index repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-index-data'><pre>PandasIndex(Index([ -80.0, -79.75,  -79.5, -79.25,  -79.0, -78.75,  -78.5, -78.25,  -78.0,\n",
       "       -77.75,\n",
       "       ...\n",
       "        87.75,   88.0,  88.25,   88.5,  88.75,   89.0,  89.25,   89.5,  89.75,\n",
       "         90.0],\n",
       "      dtype=&#x27;float32&#x27;, name=&#x27;latitude&#x27;, length=681))</pre></div></li><li class='xr-var-item'><div class='xr-index-name'><div>depth</div></div><div class='xr-index-preview'>PandasIndex</div><div></div><input id='index-c93d9aac-9afd-4e81-a7b3-108c6a1db752' class='xr-index-data-in' type='checkbox'/><label for='index-c93d9aac-9afd-4e81-a7b3-108c6a1db752' title='Show/Hide index repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-index-data'><pre>PandasIndex(Index([0.49402499198913574,  1.5413750410079956,  2.6456689834594727,\n",
       "        3.8194949626922607,   5.078224182128906,   6.440614223480225,\n",
       "          7.92956018447876,   9.572997093200684,  11.404999732971191,\n",
       "        13.467140197753906,  15.810070037841797,  18.495559692382812,\n",
       "        21.598819732666016,  25.211410522460938,  29.444730758666992,\n",
       "         34.43415069580078,  40.344051361083984,   47.37369155883789,\n",
       "         55.76428985595703,   65.80726623535156,   77.85385131835938,\n",
       "          92.3260726928711,  109.72930145263672,  130.66600036621094,\n",
       "        155.85069274902344,  186.12559509277344,  222.47520446777344,\n",
       "         266.0403137207031,   318.1274108886719,   380.2130126953125,\n",
       "         453.9377136230469,   541.0889282226562,   643.5667724609375,\n",
       "         763.3331298828125,   902.3392944335938,    1062.43994140625,\n",
       "            1245.291015625,     1452.2509765625,  1684.2840576171875,\n",
       "        1941.8929443359375,   2225.077880859375,        2533.3359375,\n",
       "         2865.702880859375,   3220.820068359375,   3597.031982421875,\n",
       "          3992.48388671875,    4405.22412109375,      4833.291015625,\n",
       "           5274.7841796875,     5727.9169921875],\n",
       "      dtype=&#x27;float32&#x27;, name=&#x27;depth&#x27;))</pre></div></li><li class='xr-var-item'><div class='xr-index-name'><div>time</div></div><div class='xr-index-preview'>PandasIndex</div><div></div><input id='index-ad443573-2315-4060-b96c-8940cb71d555' class='xr-index-data-in' type='checkbox'/><label for='index-ad443573-2315-4060-b96c-8940cb71d555' title='Show/Hide index repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-index-data'><pre>PandasIndex(DatetimeIndex([&#x27;2020-11-01 12:00:00&#x27;, &#x27;2020-11-02 12:00:00&#x27;,\n",
       "               &#x27;2020-11-03 12:00:00&#x27;, &#x27;2020-11-04 12:00:00&#x27;,\n",
       "               &#x27;2020-11-05 12:00:00&#x27;, &#x27;2020-11-06 12:00:00&#x27;,\n",
       "               &#x27;2020-11-07 12:00:00&#x27;, &#x27;2020-11-08 12:00:00&#x27;,\n",
       "               &#x27;2020-11-09 12:00:00&#x27;, &#x27;2020-11-10 12:00:00&#x27;,\n",
       "               ...\n",
       "               &#x27;2023-08-09 12:00:00&#x27;, &#x27;2023-08-10 12:00:00&#x27;,\n",
       "               &#x27;2023-08-11 12:00:00&#x27;, &#x27;2023-08-12 12:00:00&#x27;,\n",
       "               &#x27;2023-08-13 12:00:00&#x27;, &#x27;2023-08-14 12:00:00&#x27;,\n",
       "               &#x27;2023-08-15 12:00:00&#x27;, &#x27;2023-08-16 12:00:00&#x27;,\n",
       "               &#x27;2023-08-17 12:00:00&#x27;, &#x27;2023-08-18 12:00:00&#x27;],\n",
       "              dtype=&#x27;datetime64[ns]&#x27;, name=&#x27;time&#x27;, length=1021, freq=None))</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-eb23f0b0-983d-46f6-afb1-787a80f0f1e7' class='xr-section-summary-in' type='checkbox'  ><label for='section-eb23f0b0-983d-46f6-afb1-787a80f0f1e7' class='xr-section-summary' >Attributes: <span>(16)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'><dt><span>product :</span></dt><dd>GLOBAL_ANALYSIS_FORECAST_BIO_001_028</dd><dt><span>producer :</span></dt><dd>CMEMS - Global Monitoring and Forecasting Centre</dd><dt><span>title :</span></dt><dd>daily mean fields from Global Ocean Biogeochemistry Analysis and Forecast</dd><dt><span>area :</span></dt><dd>GLOBAL</dd><dt><span>quality_information_document :</span></dt><dd>http://marine.copernicus.eu/documents/QUID/CMEMS-GLO-QUID-001-028.pdf</dd><dt><span>Conventions :</span></dt><dd>CF-1.6</dd><dt><span>credit :</span></dt><dd>E.U. Copernicus Marine Service Information (CMEMS)</dd><dt><span>contact :</span></dt><dd>servicedesk.cmems@mercator-ocean.eu</dd><dt><span>references :</span></dt><dd>http://marine.copernicus.eu</dd><dt><span>source :</span></dt><dd>MERCATOR BIOMER4V2R1</dd><dt><span>licence :</span></dt><dd>http://marine.copernicus.eu/services-portfolio/service-commitments-and-licence/</dd><dt><span>dataset :</span></dt><dd>global-analysis-forecast-bio-001-028-daily</dd><dt><span>institution :</span></dt><dd>Mercator Ocean</dd><dt><span>product_user_manual :</span></dt><dd>http://marine.copernicus.eu/documents/PUM/CMEMS-GLO-PUM-001-028.pdf</dd><dt><span>forecast_type :</span></dt><dd>forecast</dd><dt><span>bulletin_date :</span></dt><dd>2023-08-09 00:00:00</dd></dl></div></li></ul></div></div>"
      ],
      "text/plain": [
       "<xarray.Dataset>\n",
       "Dimensions:    (longitude: 1440, latitude: 681, depth: 50, time: 1021)\n",
       "Coordinates:\n",
       "  * longitude  (longitude) float32 -180.0 -179.8 -179.5 ... 179.2 179.5 179.8\n",
       "  * latitude   (latitude) float32 -80.0 -79.75 -79.5 -79.25 ... 89.5 89.75 90.0\n",
       "  * depth      (depth) float32 0.494 1.541 2.646 ... 5.275e+03 5.728e+03\n",
       "  * time       (time) datetime64[ns] 2020-11-01T12:00:00 ... 2023-08-18T12:00:00\n",
       "Data variables:\n",
       "    talk       (time, depth, latitude, longitude) float32 ...\n",
       "    chl        (time, depth, latitude, longitude) float32 ...\n",
       "    dissic     (time, depth, latitude, longitude) float32 ...\n",
       "    fe         (time, depth, latitude, longitude) float32 ...\n",
       "    no3        (time, depth, latitude, longitude) float32 ...\n",
       "    nppv       (time, depth, latitude, longitude) float32 ...\n",
       "    o2         (time, depth, latitude, longitude) float32 ...\n",
       "    ph         (time, depth, latitude, longitude) float32 ...\n",
       "    phyc       (time, depth, latitude, longitude) float32 ...\n",
       "    po4        (time, depth, latitude, longitude) float32 ...\n",
       "    si         (time, depth, latitude, longitude) float32 ...\n",
       "    spco2      (time, latitude, longitude) float32 ...\n",
       "Attributes: (12/16)\n",
       "    product:                       GLOBAL_ANALYSIS_FORECAST_BIO_001_028\n",
       "    producer:                      CMEMS - Global Monitoring and Forecasting ...\n",
       "    title:                         daily mean fields from Global Ocean Biogeo...\n",
       "    area:                          GLOBAL\n",
       "    quality_information_document:  http://marine.copernicus.eu/documents/QUID...\n",
       "    Conventions:                   CF-1.6\n",
       "    ...                            ...\n",
       "    licence:                       http://marine.copernicus.eu/services-portf...\n",
       "    dataset:                       global-analysis-forecast-bio-001-028-daily\n",
       "    institution:                   Mercator Ocean\n",
       "    product_user_manual:           http://marine.copernicus.eu/documents/PUM/...\n",
       "    forecast_type:                 forecast\n",
       "    bulletin_date:                 2023-08-09 00:00:00"
      ]
     },
     "execution_count": 18,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "DS"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "42b07288-0b0c-4a07-a9b6-5b38640dc30a",
   "metadata": {},
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "id": "a93b7837-9768-4e8f-849f-264bacabf52e",
   "metadata": {
    "tags": []
   },
   "outputs": [],
   "source": [
    "DS_date = DS.sel(time=slice('2021-01-01', '2021-01-10'))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "id": "a2703c9c-29ef-4d91-933a-b58a02aeb6d0",
   "metadata": {
    "tags": []
   },
   "outputs": [],
   "source": [
    "# we're interested in two variables: CHL (chlorophyll-a) & pH\n",
    "bio_data = DS_date.sel(longitude=-122.186, latitude=36.713, depth=891, method='nearest')[['chl', 'ph']]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 32,
   "id": "63d136f5-f809-4a48-bba5-1beb447a269b",
   "metadata": {
    "tags": []
   },
   "outputs": [
    {
     "data": {
      "text/html": [
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       "    }\n",
       "\n",
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       "        text-align: right;\n",
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       "</style>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>chl</th>\n",
       "      <th>ph</th>\n",
       "      <th>longitude</th>\n",
       "      <th>latitude</th>\n",
       "      <th>depth</th>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>time</th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
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       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>2021-01-01 12:00:00</th>\n",
       "      <td>0.002936</td>\n",
       "      <td>7.559717</td>\n",
       "      <td>-122.25</td>\n",
       "      <td>36.75</td>\n",
       "      <td>902.339294</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2021-01-02 12:00:00</th>\n",
       "      <td>0.002936</td>\n",
       "      <td>7.559319</td>\n",
       "      <td>-122.25</td>\n",
       "      <td>36.75</td>\n",
       "      <td>902.339294</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2021-01-03 12:00:00</th>\n",
       "      <td>0.002936</td>\n",
       "      <td>7.558249</td>\n",
       "      <td>-122.25</td>\n",
       "      <td>36.75</td>\n",
       "      <td>902.339294</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2021-01-04 12:00:00</th>\n",
       "      <td>0.002936</td>\n",
       "      <td>7.557823</td>\n",
       "      <td>-122.25</td>\n",
       "      <td>36.75</td>\n",
       "      <td>902.339294</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2021-01-05 12:00:00</th>\n",
       "      <td>0.002936</td>\n",
       "      <td>7.558003</td>\n",
       "      <td>-122.25</td>\n",
       "      <td>36.75</td>\n",
       "      <td>902.339294</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2021-01-06 12:00:00</th>\n",
       "      <td>0.002936</td>\n",
       "      <td>7.558708</td>\n",
       "      <td>-122.25</td>\n",
       "      <td>36.75</td>\n",
       "      <td>902.339294</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2021-01-07 12:00:00</th>\n",
       "      <td>0.002935</td>\n",
       "      <td>7.559104</td>\n",
       "      <td>-122.25</td>\n",
       "      <td>36.75</td>\n",
       "      <td>902.339294</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2021-01-08 12:00:00</th>\n",
       "      <td>0.002935</td>\n",
       "      <td>7.558798</td>\n",
       "      <td>-122.25</td>\n",
       "      <td>36.75</td>\n",
       "      <td>902.339294</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2021-01-09 12:00:00</th>\n",
       "      <td>0.002935</td>\n",
       "      <td>7.558220</td>\n",
       "      <td>-122.25</td>\n",
       "      <td>36.75</td>\n",
       "      <td>902.339294</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2021-01-10 12:00:00</th>\n",
       "      <td>0.002934</td>\n",
       "      <td>7.557333</td>\n",
       "      <td>-122.25</td>\n",
       "      <td>36.75</td>\n",
       "      <td>902.339294</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "                          chl        ph  longitude  latitude       depth\n",
       "time                                                                    \n",
       "2021-01-01 12:00:00  0.002936  7.559717    -122.25     36.75  902.339294\n",
       "2021-01-02 12:00:00  0.002936  7.559319    -122.25     36.75  902.339294\n",
       "2021-01-03 12:00:00  0.002936  7.558249    -122.25     36.75  902.339294\n",
       "2021-01-04 12:00:00  0.002936  7.557823    -122.25     36.75  902.339294\n",
       "2021-01-05 12:00:00  0.002936  7.558003    -122.25     36.75  902.339294\n",
       "2021-01-06 12:00:00  0.002936  7.558708    -122.25     36.75  902.339294\n",
       "2021-01-07 12:00:00  0.002935  7.559104    -122.25     36.75  902.339294\n",
       "2021-01-08 12:00:00  0.002935  7.558798    -122.25     36.75  902.339294\n",
       "2021-01-09 12:00:00  0.002935  7.558220    -122.25     36.75  902.339294\n",
       "2021-01-10 12:00:00  0.002934  7.557333    -122.25     36.75  902.339294"
      ]
     },
     "execution_count": 32,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "bio_data.to_dataframe()"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "861f2c19-1829-49ae-9e2f-e82581df5f59",
   "metadata": {},
   "source": [
    "As you can see, there is not much variability for the two variables between the days to guarantee a proper correlation with our drastic differences in noise recording data."
   ]
  }
 ],
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