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the claim
Mauna Loa carbon dioxide monthly trends are computed from direct atmospheric gas sampling.
the verdict
SUPPORTED
the evidence backs this
refutedsupported
the weight of evidence
2 sources for · 0 against

Mauna Loa carbon dioxide monthly trends and long-term records are well-documented and computed from direct atmospheric gas sampling at the observatory.

Evidence for · 2
Atmospheric carbon dioxide at Mauna Loa Observatory: 2. Analysis of the NOAA GMCC data, 1974–1985
1989 · cited by 754
Paper 0 details continuous atmospheric carbon dioxide measurements and sampling methods from the NOAA program at the Mauna Loa Observatory.
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The analysis

The retrieved papers provide clear documentation that Mauna Loa CO2 measurements rely on direct, continuous atmospheric gas sampling and monitoring programs established since 1958.

More for · 1
Temporal Variography for the Evaluation of Atmospheric Carbon Dioxide Monitoring
2022 · cited by 2
Paper 8 describes how the Mauna Loa Observatory has continuously monitored carbon dioxide variations through direct air sampling and measurement systems since 1958.
The paper trail · every fact has a biography
first checked04 Aug 2026
judged → SUPPORTED · 9304 Aug 2026
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