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Carbon Sequestration - OSTI GOV

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Last Updated: 17 December 2022

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Earlier snowmelt may lead to late season declines in plant productivity and carbon sequestration in Arctic tundra ecosystems

Here we found that earlier snowmelt was linked to increased tundra net CO 2 sequestration and improved gross primary productivity only in June and July, but not in August, with lower net carbon sequestration and lower GPP. Our findings indicate that the expected increase in CO 2 sequestration as a result of Arctic warming and the subsequent increase in season length may not materialize if tundra ecosystems are not able to continue sequestering CO 2 later this season.

Source link: https://www.osti.gov/biblio/1896686


Deeply Rooted: Evaluating Plant Rooting Depth as a Means for Enhanced Soil Carbon Sequestration (Full Technical Report)

Soils store three times as much carbon as the atmosphere, but they are not at capacity, and improved soil C storage is regarded as a key step to combat rising atmospheric CO 2 levels. A shift toward deep-rooting crops and low-impact soil management could lead to an increase in long-term sequestration of C fixed by plants and stored in their root tissue, particularly for crops that have naturally deep root systems. Since C deposited in deep soil layers has a longer residence time, a substantial amount of the CO 2 taken up by plants is distributed to their root systems, and because C deposited in deep soil layers has a longer residence time, C increases at depth may have higher long-term C sequestration potential than topsoils. We predict that deep SOC stocks would be higher under bioenergy crops than those under shallow-rooted conventional crop cover. According to our publication from the 2018 report, which was written in collaboration with the LLNL Soil Microbiome Scientific Focus Area, C stocks increased under switchgrass, but that the increases were dependent on soil texture. In the 2019 report, carbon accumulation tended to occur most often in low-C soil in the southern United States, which could indicate that perennial grasses may be a viable option to raise SOC in marginal soils in this area. We published a modeling paper in collaboration with the LLNL Soil Microbiome SFA, where we discovered that poor crystalline minerals are abundant and strongly linked to organic C in geographically restricted zones with elevated weathering rates.

Source link: https://www.osti.gov/biblio/1829022


Deeply Rooted: Evaluating Plant Rooting Depth as a Means for Enhanced Soil Carbon Sequestration (Abbreviated Final Report)

C fixed by plants and stored in their root tissues could be increased long-term sequestration of C fixed by plants and stored in root tissues, especially for crops with naturally deep root systems. A significant amount of the CO2 taken up by plants is routed to their root systems, and because C embedded in deep soil layers has a longer residence time, some C increases at depth may have higher long-term C sequestration performance than topsoils.

Source link: https://www.osti.gov/biblio/1829024


Numerical simulation of porosity and permeability evolution of Mount Simon sandstone under geological carbon sequestration conditions

The results were also consistent with laboratory-measured solution chemistry data, which were also consistent with laboratory-measured solution chemistry results. This paper explains that siO 2 and kaolinite formation in the host rock's pore space is possible under typical CO2 sequestration conditions. Contributing to overall stability of CO 2 storage, basic security of CO 2 storage can be enhanced by siO 2 and kaolinite precipitation at the CO 2 plume elevation.

Source link: https://www.osti.gov/biblio/1225707

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions