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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.
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 ...
Detailed analyses of acidity, the carbonate concentration, the concentration of oxidation agents like hydrogen peroxide (H 2 O 2), and organic compounds (e.g. formaldehyde (HCHO)) along short intervals of ice cores, representing only a few annual layers, allowed us to investigate these chemical reactions.
14 mar 2016 · Here we help to constrain changing sources with a high-precision, high-resolution deglacial record of the stable isotopic composition of carbon in CO 2 (δ 13 C-CO 2) in air extracted from ice samples from Taylor Glacier, Antarctica.
26 lut 2016 · Polar ice cores provide a valuable archive of past atmospheric concentrations of climatically important greenhouse gases including CO 2.
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.
19 paź 2000 · The concentration of carbon dioxide (CO 2) in the atmosphere has varied in step with glacial/interglacial cycles 3, 4 (Fig. 1). During interglacial times, such as the Holocene (roughly the...
