c. 1958 CE
Keeling Curve and continuous CO₂ measurement
Energy · Technology · Infrastructure
Measurements begun at Mauna Loa in 1958 created the longest continuous record of atmospheric carbon dioxide. For energy history, they made visible global accumulation associated mainly with burning coal, oil, and gas; one station does not by itself replace all climate records or attribute emissions to a particular country.
Precision, calendar, and review
- Start
- year · approximate
- Calendar and convention
- Historical-era years; the source calendar is not identified. No conversion of days is assumed.
- Year zero
- The scale goes from 1 BCE to 1 CE without year zero. Changing era names changes labels only.
- Documentary review
- Date not recorded
Reading the date: point event.
Sources
- scripps.ucsd.edu (opens in a new tab)
Source provenance and scope
- Publication date
- 2007-12-06
- What this date describes
- The cited source or edition; it may postdate the historical event.
- Bibliographic date checked
- 2026-09-23
The correspondence between this reference and individual claims has not yet been itemized.
This record is an editorial synthesis. Consult the sources to check claims and their limits. Chronological relationships alone do not establish causation.