Carbon sequestration in terrestrial vegetation and soils is a poorly understood process, but ultimately represents a summation of biological activities including the initial incorporation of atmospheric CO2 into plant carbohydrates through photosynthesis, carbon partitioning to chemical forms of organic matter resistant to microbial decomposition and carbon allocation to recalcitrant pools of b...

Purposeful carbon sequestration by direct injection into the deep ocean can store carbon for centuries. Even after injected carbon begins to leak back out to the atmosphere, much of the injected carbon will remain sequestered because of the acid neutralizing capacity of seawater. The slow leakage that occurs centuries into the future can give a false sense of security that the carbon and climat...

Organic farming provides many benefits in Indonesia: it can improve soil quality, food quality and soil carbon sequestration. This study was designed to compare soil carbon sequestration levels between conventional and organic rice farming fields in west Java, Indonesia. The results from soil analysis indicate that organic farming leads to soil with significantly higher soil carbon storage capa...

Geoengineering is a proposed action to manipulate Earth's climate in order to counteract global warming from anthropogenic greenhouse gas emissions. We investigate the potential of a specific geoengineering technique, carbon sequestration by artificially enhanced silicate weathering via the dissolution of olivine. This approach would not only operate against rising temperatures but would also o...

As part of DOE/NETL’s Carbon Sequestration Program, we are developing an integrated, multi-pollutant modeling framework to evaluate the costs and performance of alternative carbon capture and sequestration technologies for fossil-fueled power plants. The model calculates emissions, costs, and efficiency on a systematic basis at the level of an individual plant or facility. Both new and existing...

Cost effective carbon sequestration schemes have been identified as a key need for dealing with carbon dioxide's (CO 2) impact on global climate change. Two main approaches are being pursued for sequestration: the enhancement of biological carbon sinks, and the capture and storage of CO 2. Since the bulk of the cost in a capture and storage sequestration scheme stems from CO 2 separation and co...

A mutant (Delta5) of Synechocystis sp. strain PCC 6803 constructed by inactivating five inorganic carbon sequestration systems did not take up CO(2) or HCO(3)(-) and was unable to grow in air with or without glucose. The Delta4 mutant in which BicA is the only active inorganic carbon sequestration system showed low activity of HCO(3)(-) uptake and grew under these conditions but more slowly tha...

Background The world's oceans represent the largest potential sink for the carbon dioxide (CO 2) produced by human activities (anthropogenic CO 2). Already oceans contain the equivalent of an estimated 140,000 gigatons of CO 2. The ocean's natural carbon transfer processes span of thousands of years and will eventually transfer 80-90 percent of today's man-made CO 2 emissions to the deep ocean....

Soil organic carbon (SOC) represents a significant reservoir of carbon within the global carbon cycle that has been estimated to account for 1,200–1,550 Pg C to a depth of 1 m and for 2370–2450 Pg C to a depth of 2 m (Eswaran et al. 1995; Lal 2004a). Comparative estimates of organic C contained in living biomass (560 Pg) and atmospheric CO2-C (760 Pg) (Lal 2004a) indicate that variations in the...

[1] Carbon sequestration occurs only when terrestrial ecosystems are at nonsteady states. Despite of their ubiquity in the real world, the nonsteady states of ecosystems have not been well quantified, especially at regional and global scales. In this study, we developed a two-step data assimilation scheme to estimate carbon sink strength in China’s forest ecosystems. Specifically, the two-step ...