Auflistung Geochemie, Mineralogie, Petrologie nach Schlagwort "carbon cycle"
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Atmospheric CO2 Concentration Based on Boron Isotopes Versus Simulations of the Global Carbon Cycle During the Plio‐Pleistocene
(Paleoceanography and Paleoclimatology, 2023-02-21)Atmospheric carbon dioxide concentrations (pCO2) beyond ice core records have been reconstructed from δ11B derived from planktic foraminifera found in equatorial sediment cores. Here, I applied a ... -
Do Emergent Constraints on Carbon Cycle Feedbacks Hold in CMIP6?
(Journal of Geophysical Research: Biogeosciences, 2022-12-05)Emergent constraints on carbon cycle feedbacks in response to warming and increasing atmospheric CO2 concentration have previously been identified in Earth system models participating in the Coupled Model ... -
Linking the Dissolved and Particulate Domain of Organic Carbon in Inland Waters
(Journal of Geophysical Research: Biogeosciences, 2021-05-11)Organic carbon (OC) in inland waters is found in either dissolved or particulate states, each contributing differently to carbon cycling through state‐specific forms of transport, processing, and mineralization. Degradation ... -
Pedogenic carbonates as a proxy for palaeo-CO2 in the Palaeozoic atmosphere
(Elsevier2006)According to a model by Cerling (1991, 1999), the carbon isotope composition of calcretes should depend on the soil type and the CO2-concentration in the atmosphere. We have tested Cerling’s model by investigating 14 ... -
Radiocarbon Evidence for the Contribution of the Southern Indian Ocean to the Evolution of Atmospheric CO2 Over the Last 32,000 Years
(Paleoceanography and Paleoclimatology, 2020)It is widely assumed that the ventilation of the Southern Ocean played a crucial role in driving glacial-interglacial atmospheric CO2 levels. So far, however, ventilation records from the Indian sector of the Southern Ocean ... -
Sediment Properties Drive Spatial Variability of Potential Methane Production and Oxidation in Small Streams
(Journal of Geophysical Research: Biogeosciences, 2020)Emissions of the potent greenhouse gas methane (CH4) from streams and rivers are a significant component of global freshwater methane emissions. The distribution of CH4 production and oxidation within stream sections and ... -
Sources of Uncertainty in Regional and Global Terrestrial CO2 Exchange Estimates
(Global Biogeochemical Cycles, 2020)The Global Carbon Budget 2018 (GCB2018) estimated by the atmospheric CO 2 growth rate, fossil fuel emissions, and modeled (bottom-up) land and ocean fluxes cannot be fully closed, leading to a “budget imbalance,” highlighting ... -
The Subducting Slab as a Chromatographic Column: Regimes of Sub‐Solidus Mass Transport as a Function of Lithospheric Hydration State, With Special Reference to the Fate of Carbonate
(Journal of Geophysical Research: Solid Earth, 2022-05-31)We investigate the chemical budget of subduction zones at sub‐solidus conditions using a thermodynamic‐numerical simulation in which all major rock components are treated as soluble and potentially mobile in aqueous fluids. ... -
Toward Reconciling Radiocarbon Production Rates With Carbon Cycle Changes of the Last 55,000 Years
(Paleoceanography and Paleoclimatology, 2022-02-16)Since it is currently not understood how changes in 14C production rate (Q), and in the carbon cycle, can be combined to explain the reconstructed atmospheric Δ14C record, we discuss possible reasons for this knowledge ...