{
  "key": "est_nitrate_sta_corr",
  "slug": "est_nitrate_sta_corr",
  "label": "Est. nitrate station-corrected",
  "description": "Est. nitrate station-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 a regression fitted PER CAST, from 1 m bin-averaged sensor data against that cast's bottles (n ~ 20, fliers omitted). The providers state station-corrected data are the best. Requires a 500 m cast with roughly ten or more bottles, so a null here is by design on shallow or bottle-poor casts.",
  "climatology": true,
  "bounds": {
    "valid_min": 0,
    "valid_max": 200,
    "declared_by": [
      "est_nitrate_sta_corr"
    ]
  },
  "totals": {
    "n_values": 291253,
    "n_samples": 4138,
    "n_roots": 4138,
    "n_datasets": 1,
    "year_min": 2004,
    "year_max": 2025,
    "depth_min_m": 1,
    "depth_max_m": 1029
  },
  "series": [
    {
      "measurement_type": "est_nitrate_sta_corr",
      "dataset_key": "calcofi_ctd-cast",
      "source_column": "est_no3_sta_corr",
      "qual_column": null,
      "description": "Est. nitrate station-corrected",
      "units": "umol/L",
      "nerc_p01": null,
      "is_canonical": true,
      "n_values": 291253,
      "n_samples": 4138,
      "n_roots": 4138,
      "n_cells": 88,
      "n_cruises": 66,
      "year_min": 2004,
      "year_max": 2025,
      "depth_min_m": 1,
      "depth_max_m": 1029,
      "years": {
        "2004": 4663,
        "2005": 17892,
        "2006": 14002,
        "2007": 18861,
        "2008": 12663,
        "2009": 20904,
        "2010": 15481,
        "2011": 18731,
        "2012": 17363,
        "2013": 18398,
        "2014": 16371,
        "2015": 22275,
        "2016": 19426,
        "2017": 17455,
        "2018": 17054,
        "2019": 14185,
        "2020": 11281,
        "2021": 7417,
        "2025": 6831
      },
      "months": [
        57552,
        14573,
        14355,
        55042,
        2847,
        5537,
        48155,
        15938,
        0,
        22552,
        54702,
        0
      ],
      "depth_bands": {
        "0-10": 7210,
        "10-50": 38071,
        "50-100": 47021,
        "100-200": 60331,
        "200-500": 123054,
        "500-1000": 15463,
        "1000-2000": 103,
        "2000+": 0
      },
      "qual": {
        "none": 291253
      },
      "qual_ok_n": 291253,
      "observed": {
        "min": 0,
        "p05": 0.217,
        "p50": 26.575,
        "p95": 40,
        "max": 92.74
      },
      "out_of_bounds": {
        "n": 0,
        "min": null,
        "max": null
      },
      "flags": [
        "no_flag_at_grain",
        "no_p01"
      ]
    }
  ],
  "related": [],
  "flags": [
    "no_label"
  ]
}