{
  "topic": "nyc",
  "status": "P2 asset source",
  "periods": [
    2009,
    2019,
    2024
  ],
  "duration": 20,
  "renderer": "renderer.js",
  "data": "work/p1-shade-bays-nyc-20261012/site/dist/data/nyc.json.gz",
  "visual": "Unchanged annual producer values; fixed camera; fixed0–20 µg/m³; no traffic overlay",
  "transition": "Quintic crossfades 5–8s and12–15s; endpoint-year labels; no intermediate-year values",
  "sourceVerification": [
    {
      "label": "NYC DOHMH · NYCCAS Report: 2008–2024",
      "url": "https://a816-dohbesp.nyc.gov/IndicatorPublic/data-features/nyccas/",
      "supports": "2009–2024 citywide PM2.5 decline 36%; recent source patterns; 2024 wildfire context",
      "checked": "2026-10-14"
    },
    {
      "label": "NYCCAS · Sampling Methodology",
      "url": "https://a816-dohbesp.nyc.gov/IndicatorPublic/data-features/nyccas/pdf/Appendix1.pdf",
      "supports": "Seasonal two-week samples; reference-site weather adjustment; land-use regression"
    },
    {
      "label": "NYC DOHMH · Tracking changes in pollution sources",
      "url": "https://a816-dohbesp.nyc.gov/IndicatorPublic/data-stories/restaurants-and-air-quality/",
      "supports": "Heating fuels, 2010 legislation, 2012 sulfur reduction; commercial cooking; 2015 Local Law 38"
    },
    {
      "label": "NYC DOHMH · Your Neighborhood’s Air Quality",
      "url": "https://a816-dohbesp.nyc.gov/IndicatorPublic/data-features/neighborhood-air-quality/",
      "supports": "Traffic exhaust, tire/brake particles, buildings, commercial cooking and local exposure"
    },
    {
      "label": "NYC DOHMH · Real-Time Air Quality",
      "url": "https://a816-dohbesp.nyc.gov/IndicatorPublic/data-features/realtime-air-quality/",
      "supports": "Short-term variation with weather and traffic; annual and hourly interpretation"
    },
    {
      "label": "NYC Open Data · NYCCAS Air Pollution Rasters",
      "url": "https://data.cityofnewyork.us/Environment/NYCCAS-Air-Pollution-Rasters/q68s-8qxv",
      "supports": "aa1/aa11/aa16, original grids and March 2026 data dictionary"
    },
    {
      "label": "NYC OTI · Street Centerline (CSCL)",
      "url": "https://data.cityofnewyork.us/City-Government/Centerline/inkn-q76z",
      "supports": "Contemporary constructed road geometry; retrieved 2026-10-13"
    }
  ],
  "articleFigureNote": "Main film and QA frames are original data graphics. The approved r06 article includes the credited Manhattan traffic context photograph in assets/manhattan-traffic.jpg; see articles.json for its source and attribution."
}