{
  "key": "nitrate",
  "slug": "nitrate",
  "label": "Nitrate concentration",
  "description": "Nitrate concentration",
  "units": "umol/L",
  "units_nerc_p06": "http://vocab.nerc.ac.uk/collection/P06/current/UPOX/",
  "nerc_p01": "http://vocab.nerc.ac.uk/collection/P01/current/NTRAZZXX/",
  "category": {
    "key": null,
    "name": "Nutrients & Chemistry",
    "icon": "cat-nutrients",
    "realm": "env",
    "order": 2
  },
  "is_unified": false,
  "derivation": null,
  "climatology": true,
  "bounds": {
    "valid_min": null,
    "valid_max": null,
    "declared_by": []
  },
  "totals": {
    "n_values": 364998,
    "n_samples": 364998,
    "n_roots": 14282,
    "n_datasets": 1,
    "year_min": 1959,
    "year_max": 2021,
    "depth_min_m": 0,
    "depth_max_m": 5351
  },
  "series": [
    {
      "measurement_type": "nitrate",
      "dataset_key": "calcofi_bottle",
      "source_column": "no3u_m",
      "qual_column": "no3q",
      "description": "Nitrate concentration",
      "units": "umol/L",
      "nerc_p01": "http://vocab.nerc.ac.uk/collection/P01/current/NTRAZZXX/",
      "is_canonical": true,
      "n_values": 364998,
      "n_samples": 364998,
      "n_roots": 14282,
      "n_cells": 171,
      "n_cruises": 221,
      "year_min": 1959,
      "year_max": 2021,
      "depth_min_m": 0,
      "depth_max_m": 5351,
      "years": {
        "1959": 156,
        "1961": 20,
        "1969": 8208,
        "1970": 789,
        "1971": 622,
        "1972": 10318,
        "1973": 528,
        "1974": 2473,
        "1976": 84,
        "1977": 1258,
        "1978": 22945,
        "1981": 2327,
        "1983": 2903,
        "1984": 31126,
        "1985": 7253,
        "1986": 8529,
        "1987": 10535,
        "1988": 9702,
        "1989": 9341,
        "1990": 7680,
        "1991": 7842,
        "1992": 8278,
        "1993": 8031,
        "1994": 7659,
        "1995": 7560,
        "1996": 8452,
        "1997": 7886,
        "1998": 8546,
        "1999": 7694,
        "2000": 7725,
        "2001": 7716,
        "2002": 7659,
        "2003": 8458,
        "2004": 7714,
        "2005": 7771,
        "2006": 7866,
        "2007": 7864,
        "2008": 7699,
        "2009": 8028,
        "2010": 6916,
        "2011": 7658,
        "2012": 7098,
        "2013": 7436,
        "2014": 6304,
        "2015": 7154,
        "2016": 7592,
        "2017": 7563,
        "2018": 6681,
        "2019": 5871,
        "2020": 5211,
        "2021": 2269
      },
      "months": [
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        27809,
        21742,
        59385,
        18099,
        10270,
        52732,
        28423,
        11197,
        39050,
        36938,
        2238
      ],
      "depth_bands": {
        "0-10": 27869,
        "10-50": 73584,
        "50-100": 66684,
        "100-200": 75898,
        "200-500": 94815,
        "500-1000": 23973,
        "1000-2000": 1485,
        "2000+": 690
      },
      "qual": {
        "4": 277,
        "6": 1,
        "8": 6937,
        "none": 357783
      },
      "qual_ok_n": 358061,
      "observed": {
        "min": -0.4,
        "p05": 0,
        "p50": 18.1,
        "p95": 39.8,
        "max": 95
      },
      "out_of_bounds": null,
      "flags": [
        "no_bound"
      ]
    }
  ],
  "related": [
    {
      "key": "btl_nitrate",
      "why": "same_bottles"
    }
  ],
  "flags": [
    "no_label"
  ]
}