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23 paź 2020 · 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 gru 2019 · The stable isotopes of carbon (δ 13 C) track changes in photosynthesis, respiration, organic matter decomposition and anthropogenic fuel emission inputs (e.g., McDowell et al., 2008), while the oxygen isotopes of water (δ 16 O and δ 18 O) contain information on the linkages between the carbon and water cycles (Dawson and Simonin, 2011).
Instrumentation for the continuous measurement of stable isotopes in atmospheric trace substances such as carbon dioxide (CO2), methane (CH4), and also water vapor (H2O), has grown tremendously in the last decade.
29 paź 2023 · We resolve analytical issues and present new carbon isotope ratios of CO 2 in single fluid inclusions with an error better than 2.5‰ (all errors are 1σ unless stated otherwise), providing a ...
Stable carbon isotope (δ 13 C) values are important indicators in carbon cycling, which can be used to qualitatively or quantitatively trace carbon sources, indicate carbon cycling processes, and determine end-members of the supply (Chen and Wang, 2012; Fan et al., 2020).
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 ...
Abstract We revisit the relationship between plant water use efficiency and carbon isotope signatures (Sl3C) of plant material. Based on the definitions of intrinsic, instantaneous and integrated water use efficiency, we discuss the impli-cations for interpreting <513C data from leaf to landscape levels, and across diurnal to decadal timescales ...
