{
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  "id": "calcofi_dic",
  "title": "CalCOFI DIC",
  "description": "Discrete profile dissolved inorganic carbon (DIC) and total alkalinity (TA) from CalCOFI Niskin bottle samples, quality-controlled using WOCE flagging.\n",
  "keywords": ["EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > INORGANIC CARBON", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH", "EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE", "EARTH SCIENCE > OCEANS > SALINITY/DENSITY > OCEAN SALINITY"],
  "license": "CC-BY-4.0",
  "providers": [
    {
      "name": "California Cooperative Oceanic Fisheries Investigations",
      "roles": ["producer", "licensor"],
      "url": "https://calcofi.org"
    },
    {
      "name": "CalCOFI",
      "roles": ["processor", "host"],
      "url": "https://calcofi.io"
    }
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  "extent": {
    "spatial": {
      "bbox": [
        [-125.0533, 28.1401, -117.3054, 37.0425]
      ]
    },
    "temporal": {
      "interval": [
        [
          "1983-01-01T00:00:00Z",
          "2021-12-31T23:59:59Z"
        ]
      ]
    }
  },
  "sci:doi": "10.25921/3w9f-jd72",
  "sci:citation": "Keeling, C.D.; Lueker, T.J.; Emanuele, G.; Dickson, A.G.; Martz, T.R.; Wolfe, W.H.; Mau, A. (2025). Discrete profile dissolved inorganic carbon, total alkalinity, water temperature and salinity measurements for CalCOFI (NCEI Accession 0301029). NOAA NCEI. https://doi.org/10.25921/3w9f-jd72",
  "table:tables": [
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      "name": "sample",
      "description": "One row per physical sampling event at its native grain (site, tow, net, cast, bottle, underway, transect, region pool). An adjacency list: `parent_sample_key` points at the containing event and `root_sample_key` at the top of the chain, so counting distinct events at any level is a single `GROUP BY`."
    },
    {
      "name": "obs",
      "description": "The occurrence-headline long table: one scalar measurement per row, environmental (`realm = 'env'`) and biological (`realm = 'bio'`) together. Biological taxon is the global `taxon_key`; sub-occurrence detail (length/stage bins, behavior) lives in `obs_attribute`, and event-level effort in `sample_measurement`."
    },
    {
      "name": "measurement_type"
    }
  ],
  "summaries": {
    "calcofi:category": ["Carbonate System"],
    "calcofi:variables": ["alkalinity", "umol/kg", "http://vocab.nerc.ac.uk/collection/P01/current/MDMAP014/", "Carbonate System", "ctdtemp_its90", "degC", "http://vocab.nerc.ac.uk/collection/P01/current/TEMPST01/", "Physical Oceanography", "dic", "umol/kg", "http://vocab.nerc.ac.uk/collection/P01/current/TCO2MSXX/", "Carbonate System", "salinity_pss78", "PSS-78", "http://vocab.nerc.ac.uk/collection/P01/current/PSLTZZ01/", "Physical Oceanography"]
  },
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      "href": "https://calcofi.io/datasets/calcofi_dic/",
      "type": "text/html",
      "title": "Dataset page"
    },
    {
      "rel": "license",
      "href": "https://creativecommons.org/licenses/by/4.0/",
      "type": "text/html",
      "title": "Creative Commons Attribution 4.0 International"
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}