{
  "key": "est_nitrate_cruise_corr",
  "slug": "est_nitrate_cruise_corr",
  "label": "Est. nitrate cruise-corrected",
  "description": "Est. nitrate cruise-corrected",
  "units": "umol/L",
  "units_nerc_p06": "http://vocab.nerc.ac.uk/collection/P06/current/UPOX/",
  "nerc_p01": null,
  "category": {
    "key": null,
    "name": "Nutrients & Chemistry",
    "icon": "cat-nutrients",
    "realm": "env",
    "order": 2
  },
  "is_unified": false,
  "derivation": "ISUS nitrate sensor voltage converted to nitrate by regression against bottle nitrate. Bottle-corrected with ONE regression per cruise, fitted from 4-second-averaged sensor data against all the cruise's bottles (n ~ 1400, fliers omitted).",
  "climatology": true,
  "bounds": {
    "valid_min": 0,
    "valid_max": 200,
    "declared_by": [
      "est_nitrate_cruise_corr"
    ]
  },
  "totals": {
    "n_values": 339689,
    "n_samples": 5171,
    "n_roots": 5171,
    "n_datasets": 1,
    "year_min": 2004,
    "year_max": 2026,
    "depth_min_m": 1,
    "depth_max_m": 3490
  },
  "series": [
    {
      "measurement_type": "est_nitrate_cruise_corr",
      "dataset_key": "calcofi_ctd-cast",
      "source_column": "est_no3_cruise_corr",
      "qual_column": null,
      "description": "Est. nitrate cruise-corrected",
      "units": "umol/L",
      "nerc_p01": null,
      "is_canonical": true,
      "n_values": 339689,
      "n_samples": 5171,
      "n_roots": 5171,
      "n_cells": 91,
      "n_cruises": 76,
      "year_min": 2004,
      "year_max": 2026,
      "depth_min_m": 1,
      "depth_max_m": 3490,
      "years": {
        "2004": 5195,
        "2005": 18038,
        "2006": 15937,
        "2007": 19030,
        "2008": 13854,
        "2009": 22074,
        "2010": 15862,
        "2011": 19138,
        "2012": 17533,
        "2013": 20799,
        "2014": 16490,
        "2015": 23615,
        "2016": 22831,
        "2017": 18700,
        "2018": 18637,
        "2019": 14389,
        "2020": 12653,
        "2021": 10890,
        "2023": 14391,
        "2024": 2393,
        "2025": 10530,
        "2026": 6710
      },
      "months": [
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        17377,
        16698,
        65445,
        5882,
        5921,
        57675,
        16983,
        0,
        23747,
        60392,
        0
      ],
      "depth_bands": {
        "0-10": 8647,
        "10-50": 43242,
        "50-100": 53382,
        "100-200": 69926,
        "200-500": 145136,
        "500-1000": 19124,
        "1000-2000": 222,
        "2000+": 10
      },
      "qual": {
        "none": 339689
      },
      "qual_ok_n": 339689,
      "observed": {
        "min": 0,
        "p05": 0,
        "p50": 24.5751,
        "p95": 40.0897,
        "max": 120.198
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      "out_of_bounds": {
        "n": 0,
        "min": null,
        "max": null
      },
      "flags": [
        "no_flag_at_grain",
        "no_p01"
      ]
    }
  ],
  "related": [],
  "flags": [
    "no_label"
  ]
}