Context

Since July 2022, the access to Copernicus Marine Data using WEkEO Harmonized Data Access (HDA) has been disrupted and then put back to operation in degraded mode.

As a consequence, the following is a tutorial to re-establish access to Copernicus Marine Data on WEkEO during the fix of the default data access.

It will use the WEkEO User Support Toolbox (wust), as temporary replacement of the hda Python library.

📌Note: a notebook is available as a template to present the method (browser version or Jupyter version).

Requirements

To retrieve Copernicus Marine Data on WEkEO, all you need is your data query, also known as HDA API request (created from the Data Viewer by clicking on Show API request).

Get Copernicus Marine Data - Advanced usage

Step 1. Select the `miniwekeolab` Kernel in WEkEO JupyterHub

Step 2. Get data

# Load module
import wust as wekeo_toolbox

# Set datacube parameters
hda_api_request = {
    "datasetId": "EO:MO:DAT:GLOBAL_ANALYSISFORECAST_PHY_001_024:cmems_mod_glo_phy-thetao_anfc_0.083deg_P1D-m_202211",
    "boundingBoxValues": [
        {
            "name": "bbox",
            "bbox": [
                -80.82227166132523,
                15.546788161340922,
                -62.48683219015602,
                30.30999492435313,
            ],
        }
    ],
    "dateRangeSelectValues": [
        {
            "name": "time",
            "start": "2022-09-21T00:00:00.000Z",
            "end": "2022-09-23T00:00:00.000Z",
        }
    ],
    "depthRangeSelectValues": [
    {
      "start": "0.49402499198913574",
      "end": "0.5"
    }
  ],
    "multiStringSelectValues": [{"name": "variables", "value": ["thetao"]}]
}

# Download datacube
datacube = wekeo_toolbox.load_datacube(hda_api_request, download=True, output_filename='data/hurricane_fiona.nc')

Step 3. Post-processing

The NetCDF file hurricane_fiona.nc is now located in ./data local folder and ready for post-processing.

Get Copernicus Marine Data - Beginners usage

Step 1. Download the template notebook

To discover interactively and be guided with comments and descriptions, feel free to use this template notebook in Python.

You will just have to run the cells as indicated in the notebook:

Download Example Notebook

Step 2. Run the script

From the official JupyterHub or the WEkEO Virtual Machine: upload and then open the template notebook downloaded from Step 1.

Follow the instructions in the notebook to download the Copernicus Marine data.

If you encounter any issue by following the notebook, please contact the WEkEO Support 🙏

What's next?

The perimeter of this workaround is only for Copernicus Marine data.

If a WEkEO user wants to access other Copernicus data hosted on WEkEO (e.g. Sentinels, CAMS, C3S, CEMS, CLMS, etc.) then he/she should use usual methods, either via:

📌 Note: the HDA is working as expected with all data sources except Copernicus Marine Data (a fix is ongoing).

We are user-driven and we implement users' suggestions, so feel free to contact us: