Puits de carbone

Soil C Sequestration as a Biological Negative Emission Strategy
Paustian et al.
Frontiers in climate, 2019

Most cropland mineral soils have lost 30–50% of the C stocks in top soil layers (0–30 cm) relative to their native condition (Davidson and Ackerman, 1993). In contrast, grassland soils managed for grazing may or may not have suffered similar C losses relative to their native state, depending on how they have been managed. Grasslands that have been overgrazed and poorly managed are likely significantly depleted in soil C, whereas well-managed grasslands may have C stocks equal to or exceeding their original native condition (Conant et al., 2016).

Le développement de la séquestration du carbone : un enjeu pour le climat
Centre d’études et d’expertise sur les risques, l’environnement, la mobilité et l’aménagement, 2018

Cliquer pour accéder à stockage.pdf

Changement occupation des sols puits de carbone CEREMA

Considering Forest and Grassland Carbon in Land Management
Janowiak et al.
United States department of agriculture, 2017

Cliquer pour accéder à gtr_wo95.pdf

Carbon sinks Scharlementn et al 2014

Global soil carbon: understanding and managing the largest terrestrial carbon pool
Scharlemann et al.
Carbon management, 2014

Carbon stored in soils worldwide exceeds the amount of carbon stored in phytomass and the atmosphere. Despite the large quantity of carbon stored as soil organic carbon (SOC), consensus is lacking on the size of global SOC stocks, their spatial distribution, and the carbon emissions from soils due to changes in land use and land cover. This article summarizes published estimates of global SOC stocks through time and provides an overview of the likely impacts of management options on SOC stocks. We then discuss the implications of existing knowledge of SOC stocks, their geographical distribution and the emissions due to management regimes on policy decisions, and the need for better soil carbon science to mitigate losses and enhance soil carbon stocks.

Stocks carbone aérien et souterrain

Temporal dynamics of soil organic carbon after land‐use change in the temperate zone – carbon response functions as a model approach
Poeplau et al.
Global change biology, 2011

(mean soil depth of 30±6 cm)
[…]Grassland establishment caused a long lasting carbon sink with a relative stock change of 128±23% and afforestation on former cropland a sink of 116±54%, 100 years after LUC (mean±95% confidence interval). No new equilibrium was reached within 120 years. In contrast, there was no SOC sink following afforestation of grasslands and 75% of all observations showed SOC losses, even after 100 years. Only in the forest floor, there was carbon accumulation of 0.38±0.04 Mg ha−1 yr−1 in afforestations adding up to 38±4 Mg ha−1 labile carbon after 100 years. Carbon loss after deforestation (−32±20%) and grassland conversion to cropland (−36±5%), was rapid with a new SOC equilibrium being reached after 23 and 17 years, respectively.

Changement occupation des sols puits de carbone Poeplau 2011

Changement d'occupation des sols

L’arbre et son enracinement
Danjon & Fourcaud
Innovations agronomiques, 2009

Cliquer pour accéder à Vol6-3-Danjon.pdf

Greenpeace no sequestration

Optimal grazing 2