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23 paź 2020 · By perturbing the isotopic composition of atmospheric CO 2, the Suess and Nuclear Bomb Effects have also affected all the other carbon reservoirs in the ocean and on land that exchange with atmospheric CO 2 on decadal to centennial timescales (Figures 1 and 2).
1 gru 2019 · They measured the carbon isotope content of CO 2 at atmospheric mole fractions and isotopic abundance of δ 13 C. The ability of the instrument to measure isotope ratios of δ 13 C was tested outdoors in a grassland and compared to standard laboratory based IRMS.
1 paź 2019 · We discuss carbon isotope ratios as tracers in atmospheric carbon dioxide and methane, along with DIC, DOC, and methane in ocean and pore waters. We then address carbon isotope ratios of organic matter and foraminiferal carbonate in relationship to their ambient sea-water isotope composition and their utility as non-conservative proxies.
18 sie 2023 · The two isotopes are rare and produced in a fixed ratio (6.75/1) when they are formed in surface quartz by solar radiation (much like the formation of 14 C).
1 kwi 2017 · Input parameters and estimates of the carbon isotope fractionation between dissolved inorganic carbon and atmospheric CO 2 (ε(13 C/ 12 C) DIC/CO 2) and the carbon isotope composition of atmospheric CO 2 (δ 13 C CO 2) at the level of sub-stages for the Cretaceous.
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 ...
Introduction. Carbon isotopes are present in the atmosphere, ocean, and terrestrial biosphere in ratios of approximately 99% 12C/C, 1% 13C/C, and 1 × 10−1214C/C. 12C and 13C are stable isotopes while 14C is a radioactive isotope called radiocarbon.
