data source · draft
NOAA GML Trends in CO2
NOAA Global Monitoring Laboratory's record of atmospheric carbon dioxide at Mauna Loa Observatory since 1974, as daily, weekly, monthly and annual means, with a global mean series.
What is reusable: unknown sourceopen dataAPI unknownunknown participation US public domain
The Global Monitoring Laboratory of the US National Oceanic and Atmospheric Administration publishes the carbon dioxide record from its Mauna Loa Observatory as flat files: weekly means from May 1974, with monthly and annual means, daily values and a globally averaged series beside them. Each file carries its own header on use and contact. The data are freely available; NOAA asks that publications cite the data providers, and the trends page gives the citation form.
The weekly file notes two things a model should know. Values for the last several months are preliminary and still under quality control. And measurements at Mauna Loa were suspended from 29 November 2022, after the volcano erupted, until July 2023; observations from December 2022 to 4 July 2023 come from a site at the Maunakea Observatories about 21 miles north.
The Vitals page here reads the weekly file.
- coverage
- Mauna Loa Observatory, Hawaii; also globally averaged marine surface series
- cadence
- weekly means from May 1974; the last several months are preliminary
- access
- open download, no key
- format
- CSV, text, JSON
- homepage
- https://gml.noaa.gov/ccgg/trends/
- cost
- free, US public domain; NOAA asks for a citation
needed by
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Six running measurements of the planet's state, refreshed from their sources at every deploy.
Tags: carbon dioxide, greenhouse gases, Mauna Loa, time series