{
  "key": "btl_nitrate",
  "slug": "btl_nitrate",
  "label": "Bottle nitrate",
  "description": "Bottle nitrate",
  "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": 0,
    "valid_max": 100,
    "declared_by": [
      "btl_nitrate"
    ]
  },
  "totals": {
    "n_values": 142197,
    "n_samples": 8338,
    "n_roots": 8338,
    "n_datasets": 1,
    "year_min": 1993,
    "year_max": 2025,
    "depth_min_m": 1,
    "depth_max_m": 3510
  },
  "series": [
    {
      "measurement_type": "btl_nitrate",
      "dataset_key": "calcofi_ctd-cast",
      "source_column": "no3",
      "qual_column": null,
      "description": "Bottle nitrate",
      "units": "umol/L",
      "nerc_p01": "http://vocab.nerc.ac.uk/collection/P01/current/NTRAZZXX/",
      "is_canonical": true,
      "n_values": 142197,
      "n_samples": 8338,
      "n_roots": 8338,
      "n_cells": 91,
      "n_cruises": 120,
      "year_min": 1993,
      "year_max": 2025,
      "depth_min_m": 1,
      "depth_max_m": 3510,
      "years": {
        "1993": 2387,
        "1994": 4813,
        "1995": 3657,
        "1996": 5487,
        "1997": 4954,
        "1998": 5367,
        "1999": 4840,
        "2000": 4738,
        "2001": 4681,
        "2002": 4789,
        "2003": 4629,
        "2004": 4809,
        "2005": 5057,
        "2006": 5158,
        "2007": 4871,
        "2008": 4801,
        "2009": 5261,
        "2010": 4478,
        "2011": 5115,
        "2012": 4743,
        "2013": 5043,
        "2014": 4263,
        "2015": 5010,
        "2016": 5047,
        "2017": 5102,
        "2018": 4575,
        "2019": 4012,
        "2020": 3267,
        "2021": 3594,
        "2022": 858,
        "2023": 379,
        "2024": 2876,
        "2025": 3536
      },
      "months": [
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        2198,
        16225,
        16946,
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      "depth_bands": {
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        "10-50": 30609,
        "50-100": 29619,
        "100-200": 29642,
        "200-500": 34902,
        "500-1000": 6882,
        "1000-2000": 54,
        "2000+": 20
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      "qual": {
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      "qual_ok_n": 142197,
      "observed": {
        "min": 0,
        "p05": 0,
        "p50": 17.1,
        "p95": 39,
        "max": 47.84
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      "out_of_bounds": {
        "n": 0,
        "min": null,
        "max": null
      },
      "flags": [
        "no_flag_at_grain"
      ]
    }
  ],
  "related": [
    {
      "key": "nitrate",
      "why": "same_bottles"
    }
  ],
  "flags": [
    "no_label"
  ]
}