Carbon dioxide CO2 emissions by rock derived organic carbon oxidation
The global carbon cycle controls Earth’s climate by the emission and drawdown of carbon dioxide (CO2) from the atmosphere. One of the major sources of CO2 is thought to be the oxidation of organic carbon contained in rocks during...
ver más
¿Tienes un proyecto y buscas un partner? Gracias a nuestro motor inteligente podemos recomendarte los mejores socios y ponerte en contacto con ellos. Te lo explicamos en este video
Proyectos interesantes
CONTROLPASTCO2
Quantifying the link between weathering and past CO2 levels
2M€
Cerrado
CGL2011-25162
MECANISMOS Y FACTORES AMBIENTALES QUE CONTROLAN EL TRANSPORT...
106K€
Cerrado
CGL2010-17108
VARIABILIDAD TEMPORAL DE LA CONCENTRACION DE CO2 EN SISTEMAS...
142K€
Cerrado
CHOCOLATE
CHanges Of CO2 Levels during pAst and fuTure intErglacials
185K€
Cerrado
CTM2010-17141
TRANSPORTE DE CARBONO Y TASAS DE ACIDIFICACION EN EL ATLANTI...
357K€
Cerrado
REINFORCE
Reconstructing and Interpreting the Forcing of Climate using...
100K€
Cerrado
Información proyecto ROC-CO2
Duración del proyecto: 75 meses
Fecha Inicio: 2016-02-12
Fecha Fin: 2022-05-31
Fecha límite de participación
Sin fecha límite de participación.
Descripción del proyecto
The global carbon cycle controls Earth’s climate by the emission and drawdown of carbon dioxide (CO2) from the atmosphere. One of the major sources of CO2 is thought to be the oxidation of organic carbon contained in rocks during chemical weathering. Since the industrial revolution, this flux has been accelerated by burning fossil fuels. However, the natural rates of CO2 emission by rock-derived organic carbon oxidation are very poorly constrained – the only major CO2 source that has not been properly quantified – and the dominant controls on this flux remain unclear. The CO2 release is likely to be ~100 TgC/yr, similar to degassing from volcanoes. Without knowing the rate of CO2 emission and the controls on this flux, it is not possible to fully understand the evolution of atmospheric CO2 and global climate over geological timescales, nor to project future changes over hundreds to thousands of years. To address this deficit and quantify a major geological CO2 source, the proposal will:
1) Assess which factors govern rock-derived organic carbon oxidation.
2) Determine how environmental changes impact oxidation rates and CO2 release.
3) Quantify the global CO2 emissions by rock-derived organic carbon oxidation during chemical weathering, and assess how they may have varied both over Earth history and via anthropogenic change.
By quantifying a major CO2 emission for the first time, this project will provide a step change in our understanding of the geological, as opposed to the anthropogenically-modified, carbon cycle. Measurement of rock-derived organic carbon oxidation will require a new approach, harnessing state-of-the-art geochemical proxies carried by rivers (rhenium). Data from river catchments spanning large gradients in the likely environmental controls (erosion, temperature), will elucidate the main factors governing this process, and enable construction of a data-driven numerical model to provide the first quantification of CO2 emissions by this process.