{
  "key": "oxygen_umol_kg_1",
  "slug": "oxygen_umol_kg_1",
  "label": "DO sensor 1 (uncorrected)",
  "description": "DO sensor 1 (uncorrected)",
  "units": "umol/kg",
  "units_nerc_p06": "http://vocab.nerc.ac.uk/collection/P06/current/KGUM/",
  "nerc_p01": "http://vocab.nerc.ac.uk/collection/P01/current/DOXMZZXX/",
  "category": {
    "key": null,
    "name": "Physical Oceanography",
    "icon": "cat-physical",
    "realm": "env",
    "order": 1
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  "climatology": true,
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    "declared_by": [
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    "n_roots": 9361,
    "n_datasets": 1,
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    "depth_max_m": 3630
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      "dataset_key": "calcofi_ctd-cast",
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      "qual_column": "ox1q",
      "description": "DO sensor 1 (uncorrected)",
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      "nerc_p01": "http://vocab.nerc.ac.uk/collection/P01/current/DOXMZZXX/",
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        "1995": 15577,
        "1996": 23041,
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    {
      "key": "oxygen_btl_umol_kg",
      "why": "same_bottles"
    },
    {
      "key": "oxygen_umol_kg",
      "why": "sensor_vs_mean"
    },
    {
      "key": "oxygen_umol_kg_2",
      "why": "paired_sensors"
    },
    {
      "key": "r_oxygen_umol_kg",
      "why": "pre_qc_twin"
    }
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}