{"id":310414,"date":"2024-03-19T21:58:54","date_gmt":"2024-03-19T20:58:54","guid":{"rendered":"https:\/\/climatescience.press\/?p=310414"},"modified":"2024-03-19T21:58:56","modified_gmt":"2024-03-19T20:58:56","slug":"the-conclusion-humans-drive-atmospheric-co2-increases-is-undermined-by-carbon-isotope-data","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=310414","title":{"rendered":"The Conclusion Humans Drive Atmospheric CO2 Increases Is Undermined By Carbon Isotope Data"},"content":{"rendered":"\n
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From NoTricksZone<\/a><\/p>\n\n\n\n

By\u00a0Kenneth Richard<\/a><\/em><\/p>\n\n\n\n

\u201cFrom modern instrumental carbon isotopic data of the last 40 years, no signs of human (fossil fuel) CO2<\/sub>\u00a0emissions can be discerned.\u201d \u2013 Koutsoyiannis, 2024<\/strong><\/p>\n\n\n\n

It is routinely claimed that a telltale sign human emissions (fossil fuels) have irrevocably altered the atmospheric CO2 concentration is a declining trend in carbon isotope 13 (\u03b413C), considered an interruption of natural carbon cycle processes.<\/p>\n\n\n\n

But new research<\/a><\/strong> examining isotopic data from four observation sites (South Pole, Mauna Loa, Barrow, La Jolla \u2013 regarded as \u201cglobal\u201d in their coverage) indicates there is no isotopic pattern consistent with a human fingerprint.<\/p>\n\n\n\n

\u201cThe standard metric \u03b413C is consistent with an input isotopic signature that is stable over the entire period of observations (>40 years), i.e., not affected by increases in human CO2 emissions.\u201d<\/em><\/p>\n\n\n\n

In fact, not only has the input isotopic CO2 signature not been declining as proposed by those who believe humans are fully responsible for the increase in atmospheric CO2 concentration, but, according to multiple detection techniques using both modern data and paleo data extending to the Little Ice Age (16th to mid-19th century), \u03b413C [input] has actually been increasing.<\/p>\n\n\n\n

This directionality is the exact opposite of what is supposed to happen if fossil fuels were driving atmospheric CO2 increases.<\/p>\n\n\n\n

\u201c\u2026for the longer subperiod lengths, 20 and 30 years, the tendencies are clearly increasing, opposite to the hypothesis that they are caused by fossil fuel emissions\u201d<\/em><\/p>\n\n\n\n

\u201c\u2026the trends are small and always positive, again contradicting the fossil fuel origin of the phenomenon\u201d<\/em><\/p>\n\n\n\n

\u201c\u2026from period B to C [1899-1976 to 1977-1997], we note an increase in \u03b413<\/sup>C [input,\u00a0 from -13.9\u2030 to -12.9\u2030], contradicting the fossil fuel origin of the phenomenon\u201d<\/em><\/p>\n\n\n\n

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Image Source:\u00a0Koutsoyiannis, 2024<\/a><\/strong><\/figcaption><\/figure>\n\n\n\n
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