{
  "version": "1.0.0",
  "checked": "2026-10-21",
  "forecast_window": [
    2021,
    2026
  ],
  "forecast_window_reason": "Six most recent consecutive annual forecast/survey pairs available at review; no omitted year or refitted forecast.",
  "oxygen_year": 2019,
  "oxygen_year_reason": "Historical cruise 332 already identified in the DR08 archive investigation, predates inspecting oxygen distribution. Latest 2026 service has 189 location rows but zero populated oxmgl values; do not substitute zero.",
  "oxygen_units": "mg/L",
  "hypoxia_definition": "bottom dissolved oxygen <= 2 mg/L",
  "regional_box": {
    "name": "Louisiana-adjacent shelf analysis box; not a jurisdictional boundary",
    "longitude_min": -94,
    "longitude_max": -89,
    "latitude_min": 28,
    "latitude_max": 30
  },
  "regional_box_reason": "Declared simple geographic subset encompassing the western Louisiana-adjacent shelf before numerical subset analysis; not optimized to low oxygen.",
  "depth_bins_m": [
    [
      0,
      20
    ],
    [
      20,
      50
    ],
    [
      50,
      200
    ]
  ],
  "depth_definition": "waterdepth; bins [lower, upper), final upper inclusive",
  "rules": [
    "Require matching CruiseYear2019 and Summer, unique cruise/station/cast identity, finite numeric oxygen >=0, valid coordinates and positive water depth.",
    "Keep nulls excluded, never zero-filled. Count stations, not percent of seafloor. No area interpolation, temporal trend, fish catch prediction, or current conditions map.",
    "Retain sample depth separately from total water depth; these are near-bottom observations, not full vertical profiles.",
    "Use original mg/L values for inclusive <=2 classification; rounding only for display."
  ]
}