{
  "schema_version": 1,
  "name": "Anthropocene particulate 2025 complete-year atlas",
  "description": "Source-separated counts of particulate, fire, smoke, air-quality, climate, hydrology, and weather observations; no composite attribution score.",
  "duration": {
    "type": "calendar-year",
    "year": 2025
  },
  "snapshot": {
    "as_of_utc": "2026-08-10T00:00:00Z",
    "data_through": "2025-12-31",
    "partial_year": false
  },
  "aggregation": {
    "spatial_index": "H3",
    "h3_resolution": 4,
    "count_mode": "unique-source-reporting-days"
  },
  "thresholds": {
    "minimum_record_years": 30,
    "minimum_valid_days_per_year": 183,
    "heavy_precipitation_minimum_mm": 10.0,
    "heavy_precipitation_percentile": 0.95,
    "heavy_precipitation_baseline_start": 1991,
    "heavy_precipitation_baseline_end": 2020,
    "pm25_aqi_threshold_exclusive": 100
  },
  "display": {
    "marker_radius": 0.055,
    "minimum_nonzero_opacity": 0.35,
    "show_legend": true
  },
  "data": {
    "geojson": "anthropocene-particulate-2025.geojson",
    "sha256": "ecd4b11bab4faa9895522dbfe75436ef66820f53620bf0c5f6fc7404e9f5426b"
  },
  "metrics": [
    {
      "id": "climate-records:temperature-record-high-days",
      "property": "temperature_record_high_days",
      "family": "climate-records",
      "title": "New daily maximum-temperature record days",
      "enabled": true,
      "scale_days": 8,
      "color": "#d94841",
      "shape": "triangle-up",
      "sources": ["noaa-ghcn-gsn"]
    },
    {
      "id": "climate-records:temperature-record-low-days",
      "property": "temperature_record_low_days",
      "family": "climate-records",
      "title": "New daily minimum-temperature record days",
      "enabled": true,
      "scale_days": 8,
      "color": "#397dcc",
      "shape": "triangle-down",
      "sources": ["noaa-ghcn-gsn"]
    },
    {
      "id": "hydrology:precipitation-record-days",
      "property": "precipitation_record_days",
      "family": "hydrology",
      "title": "New daily precipitation-record days",
      "enabled": true,
      "scale_days": 8,
      "color": "#2475a9",
      "shape": "diamond",
      "sources": ["noaa-ghcn-gsn"]
    },
    {
      "id": "hydrology:heavy-precipitation-days",
      "property": "heavy_precipitation_days",
      "family": "hydrology",
      "title": "Heavy-precipitation days above the 1991-2020 wet-day p95",
      "enabled": true,
      "scale_days": 24,
      "color": "#1f9db5",
      "shape": "circle",
      "sources": ["noaa-ghcn-gsn"]
    },
    {
      "id": "fire:active-fire-days",
      "property": "active_fire_days",
      "family": "fire",
      "title": "Satellite active-fire detection days",
      "enabled": true,
      "scale_days": 60,
      "color": "#eb721f",
      "shape": "hexagon",
      "sources": ["cwfis-hotspots", "nasa-firms"]
    },
    {
      "id": "atmosphere:observed-smoke-days",
      "property": "observed_smoke_days",
      "family": "atmosphere",
      "title": "Analyst-observed smoke plume days",
      "enabled": true,
      "scale_days": 60,
      "color": "#776b83",
      "shape": "ring",
      "sources": ["noaa-hms-smoke"]
    },
    {
      "id": "hydrology:flood-event-days",
      "property": "flood_event_days",
      "family": "hydrology",
      "title": "Reported flood or heavy-rain event days",
      "enabled": true,
      "scale_days": 18,
      "color": "#285bb5",
      "shape": "square",
      "sources": ["noaa-storm-events"]
    },
    {
      "id": "severe-weather:extreme-event-days",
      "property": "extreme_weather_event_days",
      "family": "severe-weather",
      "title": "Reported severe-weather event days",
      "enabled": true,
      "scale_days": 24,
      "color": "#a441a8",
      "shape": "star",
      "sources": ["noaa-storm-events"]
    },
    {
      "id": "air-quality-exposure:pm25-exceedance-days",
      "property": "pm25_exceedance_days",
      "family": "air-quality-exposure",
      "title": "EPA PM2.5 AQI exceedance days (AQI > 100)",
      "enabled": true,
      "scale_days": 18,
      "color": "#a56a25",
      "shape": "cross-square",
      "sources": ["epa-airdata-pm25"]
    }
  ],
  "sources": [
    {
      "id": "noaa-ghcn-gsn",
      "status": "included",
      "coverage": "global GSN station points",
      "available_through": "2025-12-31",
      "url": "https://www.ncei.noaa.gov/pub/data/ghcn/daily/ghcnd_gsn.tar.gz"
    },
    {
      "id": "epa-airdata-pm25",
      "status": "included",
      "coverage": "United States regulatory monitor points",
      "available_through": "2025-12-31",
      "url": "https://aqs.epa.gov/aqsweb/airdata/daily_88101_2025.zip"
    },
    {
      "id": "noaa-hms-smoke",
      "status": "included",
      "coverage": "North America analyst-drawn smoke polygons",
      "available_through": "2025-12-31",
      "url": "https://satepsanone.nesdis.noaa.gov/pub/FIRE/web/HMS/Smoke_Polygons/Shapefile/Annual_Bundles/hms_smoke2025.zip"
    },
    {
      "id": "noaa-storm-events",
      "status": "included",
      "coverage": "United States reported event locations",
      "available_through": "2025-12-31",
      "url": "https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/"
    },
    {
      "id": "cwfis-hotspots",
      "status": "included",
      "coverage": "Canada and North America public daily hotspot files",
      "available_through": "2025-12-31",
      "url": "https://cwfis.cfs.nrcan.gc.ca/downloads/hotspots/"
    },
    {
      "id": "nasa-firms",
      "status": "configured-optional",
      "coverage": "global satellite active-fire points, including northern Canada and Russia",
      "available_through": null,
      "credential_environment": "FIRMS_MAP_KEY",
      "url": "https://firms.modaps.eosdis.nasa.gov/api/area/"
    },
    {
      "id": "copernicus-sentinel-3-frp",
      "status": "validation-only",
      "coverage": "global Sentinel-3 fire radiative power, including northern Russia",
      "available_through": null,
      "url": "https://cds.climate.copernicus.eu/datasets/satellite-fire-radiative-power"
    },
    {
      "id": "rosleskhoz-operational-reports",
      "status": "validation-only",
      "coverage": "Russian administrative fire reports; not a stable point API",
      "available_through": null,
      "url": "https://rosleshoz.gov.ru/activity/forest-security-and-protection/fires/operative-information/"
    },
    {
      "id": "cal-fire-incidents",
      "status": "supplemental-not-default",
      "coverage": "California incident reports",
      "available_through": null,
      "url": "https://www.fire.ca.gov/incidents"
    },
    {
      "id": "purpleair",
      "status": "excluded-from-standard",
      "coverage": "low-cost PM sensors; PM observations do not establish smoke attribution",
      "available_through": null,
      "url": "https://api.purpleair.com/"
    }
  ],
  "future_phases": [
    {
      "id": "ocean-heat:coral-bleaching-stress-days",
      "status": "separate-phase",
      "reason": "Scientifically valuable, but reef masks, raster time-series sampling, marine projections, and uncertainty need a dedicated pipeline.",
      "candidate_source": "NOAA Coral Reef Watch"
    }
  ]
}