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23 paź 2020 · These exchanges between the atmosphere and other carbon reservoirs have modulated the changes to atmospheric CO 2, effectively mixing the anthropogenic emissions into a larger carbon pool that encompasses atmospheric CO 2 and land and ocean carbon with residence times of about a century or less.
1 gru 2019 · TDLAS measures the mixing ratios of stable isotopes of carbon dioxide in the air (e.g., the isotopologues, 12 C 16 O 2, 13 C 16 O 2 and 16 O 12 C 18 O) by comparing the infrared absorption of sample and reference gases in a specific absorption line of the spectrum (Santos et al., 2012).
1 paź 2019 · Stable carbon isotope ratios (13 C/ 12 C), expressed as δ 13 C values, are widely used in modern Earth sciences. δ 13 C CO2 values of atmospheric carbon dioxide reflect global climate evolution and change.
18 sie 2023 · Carbon isotopes can be used to study the sources and sinks of CO2 in the atmosphere, and to understand the role of different types of vegetation in the carbon cycle. Oxygen isotopes can be used to study the sources and sinks of water vapor in the atmosphere, and to understand the effects of climate change on precipitation patterns.
17 sty 2018 · Atmospheric effects must be taken into account when interpreting terrestrial stable carbon isotopes, with important implications for past environments and climates, and understanding plant ...
The selective enrichment of one stable isotope over another creates distinct isotopic fractionations that can be measured and correlated among oxygenic phototrophs. The degree of carbon isotope fractionation is influenced by several factors, including the metabolism, anatomy, growth rate, and environmental conditions of the organism.
17 lis 2023 · Isotopic measurements provide valuable information about the origin of greenhouse gases — as carbon dioxide levels increase, there is a corresponding shift towards lighter isotopic composition similar to that of fossil fuels.
