{
  "key": "chl_integrated_depth",
  "slug": "chl_integrated_depth",
  "label": "Depth reached by chl_integrated (200 m unless the cast is shallower)",
  "short_label": "Chlorophyll integration depth",
  "description": "Depth reached by chl_integrated (200 m unless the cast is shallower)",
  "units": "m",
  "units_nerc_p06": "http://vocab.nerc.ac.uk/collection/P06/current/ULAA/",
  "nerc_p01": null,
  "category": {
    "key": null,
    "name": "Productivity & Pigments",
    "icon": "cat-productivity",
    "realm": "env",
    "order": 4
  },
  "is_unified": false,
  "derivation": "calcofi4db::ctd_integrate(): min(200, deepest good bin) (questions Q02)",
  "climatology": false,
  "bounds": {
    "valid_min": 0,
    "valid_max": 200,
    "declared_by": [
      "chl_integrated_depth"
    ]
  },
  "totals": {
    "n_values": 9171,
    "n_samples": 9171,
    "n_roots": 9171,
    "n_datasets": 1,
    "year_min": 1993,
    "year_max": 2026,
    "depth_min_m": null,
    "depth_max_m": null,
    "qual_ok_n": 9171,
    "n_flagged": 0
  },
  "series": [
    {
      "measurement_type": "chl_integrated_depth",
      "dataset_key": "calcofi_ctd-derived",
      "source_column": "est_chlorophyll_a_sta_corr",
      "qual_column": null,
      "description": "Depth reached by chl_integrated (200 m unless the cast is shallower)",
      "units": "m",
      "nerc_p01": null,
      "is_canonical": true,
      "n_values": 9171,
      "n_samples": 9171,
      "n_roots": 9171,
      "n_cells": 109,
      "n_cruises": 136,
      "year_min": 1993,
      "year_max": 2026,
      "depth_min_m": null,
      "depth_max_m": null,
      "years": {
        "1993": 130,
        "1994": 263,
        "1995": 259,
        "1996": 281,
        "1997": 274,
        "1998": 406,
        "1999": 258,
        "2000": 255,
        "2001": 251,
        "2002": 254,
        "2003": 251,
        "2004": 270,
        "2005": 293,
        "2006": 296,
        "2007": 286,
        "2008": 282,
        "2009": 308,
        "2010": 305,
        "2011": 316,
        "2012": 278,
        "2013": 326,
        "2014": 255,
        "2015": 305,
        "2016": 347,
        "2017": 325,
        "2018": 294,
        "2019": 237,
        "2020": 227,
        "2021": 264,
        "2022": 222,
        "2023": 318,
        "2024": 238,
        "2025": 225,
        "2026": 72
      },
      "months": [
        1627,
        551,
        372,
        1920,
        111,
        123,
        1545,
        656,
        117,
        941,
        1184,
        24
      ],
      "depth_bands": {
        "0-10": 0,
        "10-50": 0,
        "50-100": 0,
        "100-200": 0,
        "200-500": 0,
        "500-1000": 0,
        "1000-2000": 0,
        "2000+": 0
      },
      "qual": {
        "none": 9171
      },
      "qual_ok_n": 9171,
      "n_flagged": 0,
      "observed": {
        "min": 3,
        "p05": 21,
        "p50": 200,
        "p95": 200,
        "max": 200
      },
      "out_of_bounds": {
        "n": 0,
        "min": null,
        "max": null
      },
      "flags": [
        "no_flag_at_grain",
        "no_p01"
      ],
      "grain": "sample"
    }
  ],
  "related": [],
  "flags": [
    "no_label"
  ],
  "face": {
    "kind": "scale",
    "face_of": null,
    "stands_in_note": null,
    "source": "no NERC P01 on this key; shows its own familiar-scale figure only (D3)"
  },
  "method": [
    {
      "dataset_key": "calcofi_ctd-derived",
      "measurement_type": "chl_integrated_depth",
      "platform": "ctd",
      "instrument": "Computed from the CTD fluorometer profile (corrected to bottle chlorophyll-a)",
      "nerc_l22": null,
      "principle": "The depth chl_integrated reached: 200 m unless the cast is shallower.",
      "steps": [],
      "wavelength_nm": null,
      "precision": null,
      "bibkeys": [],
      "calcofi_org_url": null,
      "text_fragment": null,
      "source": "the record's own derivation (measurement_type.csv)",
      "source_url": null
    }
  ],
  "why": [
    {
      "rank": 1,
      "kind": "authored",
      "text": "This is how deep chl_integrated reached, 200 m unless the cast was shallower, and it is there so a short column is not compared with a full one.",
      "bibkeys": [],
      "source_url": null,
      "eov": "Phytoplankton biomass and diversity",
      "goos_doc": "https://goosocean.org/document/17507"
    },
    {
      "rank": 2,
      "kind": "authored",
      "text": "On the shelf it is the cast’s own depth; offshore it is 200 m.",
      "bibkeys": [],
      "source_url": null,
      "eov": "Phytoplankton biomass and diversity",
      "goos_doc": "https://goosocean.org/document/17507"
    },
    {
      "rank": 3,
      "kind": "wikipedia",
      "text": "Deep chlorophyll maximum",
      "bibkeys": [],
      "source_url": "https://en.wikipedia.org/wiki/Deep_chlorophyll_maximum",
      "eov": "Phytoplankton biomass and diversity",
      "goos_doc": "https://goosocean.org/document/17507"
    }
  ],
  "grain": "sample"
}