{
  "title": "The air keeps changing",
  "dataset": "NOAA GML Mauna Loa annual mean CO2, 1959–2025",
  "data_url": "https://gml.noaa.gov/webdata/ccgg/trends/co2/co2_annmean_mlo.csv",
  "citation": "Lan, X., Tans, P. and K.W. Thoning: Trends in atmospheric carbon dioxide from NOAA Global Monitoring Laboratory (https://gml.noaa.gov/ccgg/trends/). Early measurements: C. David Keeling, Scripps Institution of Oceanography.",
  "retrieved_at": "2026-10-15T23:53:47.059349+00:00",
  "rows": 67,
  "first_ppm": 315.98,
  "last_ppm": 427.35,
  "increase_percent": 35.24590163934427,
  "unit": "dry-air mole fraction, micromol/mol (ppm); concentration, not annual emissions",
  "notes": [
    "Annual means only; no 2026 partial year",
    "NOAA source version dated 2026-10-09; revisions possible; uncertainties retained in raw CSV",
    "Dec 2022 through 4 July 2023 observations temporarily from Maunakea due to eruption disruption",
    "Interpolation is visual only; no invented observations",
    "Display y-axis must remain clearly labeled; if cropped, no zero-baseline magnitude claim"
  ],
  "image": {
    "url": "https://gml.noaa.gov/main_img/mlo.jpg",
    "page": "https://gml.noaa.gov/obop/mlo/",
    "credit": "Image provided by NOAA Global Monitoring Laboratory, Boulder, Colorado, USA",
    "rights": "Public domain unless specifically annotated otherwise; no contrary annotation on source page. NOAA material not subject to copyright. No endorsement claimed.",
    "policy": "https://gml.noaa.gov/about/disclaimer.html",
    "sha256": "2ee061b7aafe6381840a61a8d5af1aa353ba75a6e17b912599e017b30531a7de"
  },
  "data_rights": "Freely available per NOAA file header; citation retained. Original values unchanged."
}