We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Net Isotopic Signature of Atmospheric CO 2 Sources and Sinks: No Change since the Little Ice Age.
- Authors
Koutsoyiannis, Demetris
- Abstract
Recent studies have provided evidence, based on analyses of instrumental measurements of the last seven decades, for a unidirectional, potentially causal link between temperature as the cause and carbon dioxide concentration ([CO2]) as the effect. In the most recent study, this finding was supported by analysing the carbon cycle and showing that the natural [CO2] changes due to temperature rise are far larger (by a factor > 3) than human emissions, while the latter are no larger than 4% of the total. Here, we provide additional support for these findings by examining the signatures of the stable carbon isotopes, 12 and 13. Examining isotopic data in four important observation sites, we show that the standard metric δ13C 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. In addition, proxy data covering the period after 1500 AD also show stable behaviour. These findings confirm the major role of the biosphere in the carbon cycle and a non-discernible signature of humans.
- Subjects
ATMOSPHERIC carbon dioxide; LITTLE Ice Age; ISOTOPIC signatures; CARBON cycle; CARBON isotopes; STABLE isotopes
- Publication
Sci, 2024, Vol 6, Issue 1, p17
- ISSN
2413-4155
- Publication type
Article
- DOI
10.3390/sci6010017