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23 paź 2020 · Key Points. Carbon isotopes, 14 C and 13 C, in atmospheric CO 2 are changing in response to fossil fuel emissions and other human activities. Future simulations using different SSPs show continued changes in isotopic ratios that depend on fossil fuel emissions and, for 13 C, BECCS.
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. Marine δ 13 C DIC is used as water-mass tracer and helps quantifying the anthropogenic CO 2 uptake of the ocean.
22 wrz 2022 · This paper outlines the use of stable isotopic carbon tracers to distinguish the sources and influences of waters around the western North Pacific to provide further constraints on physical, biological, and anthropogenic processes.
17 sty 2018 · The 13 C/ 12 C ratio of C 3 plant matter is thought to be controlled by the isotopic composition of atmospheric CO 2 and stomatal response to environmental conditions, particularly mean...
1 sty 2018 · Two main carbon reservoirs exist, the reduced biogenic organic carbon reservoir (organic matter) and the oxidized carbonate reservoir, covering a wide range of stable carbon isotopic signatures from less than −100‰ to greater than 10‰, depending on the carbon source (Figs. 2 and 3).
7 sty 2008 · Stable carbon isotopes are used extensively to examine physiological, ecological, and biogeochemical processes related to ecosystem, regional, and global carbon cycles and provide information at a variety of temporal and spatial scales.
28 wrz 2021 · Stable isotopes of hydrogen, carbon and oxygen are used to investigate numerous physical and chemical processes in the water and inorganic carbon cycles. Measuring and comparing natural...
