Historical impacts of grazing on carbon stocks and climate mitigation opportunities

Nature Climate Change, Journal Year: 2024, Volume and Issue: 14(4), P. 380 - 386

Published: March 15, 2024

Language: Английский

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Depth dependence of soil organic carbon additional storage capacity in different soil types by the 2050 target for carbon neutrality

SOIL, Journal Year: 2025, Volume and Issue: 11(1), P. 149 - 174

Published: Feb. 5, 2025

Abstract. Land planning projects aiming to maximize soil organic carbon (SOC) stocks are increasing in number and scope, often line with the objective reach neutrality by 2050. In response, a rising of studies assesses where additional SOC could be stored over regional global spatial scales. order provide realistic values transferrable beyond scientific community, providing targets accrual should consider timescales needed them, taking into consideration effects C inputs, type, depth on dynamics. This research was conducted 320 km2 territory north-eastern France, eight contrasted types have been identified, characterized, mapped thanks high density fully described profiles. Continuous profiles were interpolated for each type land use (cropland, grassland, or forest). We defined potential using percentile boundary lines used linear model depth-dependent dynamics explore inputs necessary those within 25 years. also from literature input scenarios provided maps stocks, maximum accrual, highly heterogenous region study. Median range 78–333 tC ha−1. Maximum varies 19 ha−1 forested Leptosols 197 grassland Gleysols. The simulated years whole study one-fifth accrual. Further different is therefore storage relevant public policies approach

Language: Английский

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Enhanced silicate weathering accelerates forest carbon sequestration by stimulating the soil mineral carbon pump

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(8)

Published: Aug. 1, 2024

Abstract Enhanced silicate rock weathering (ERW) is an emerging strategy for carbon dioxide removal (CDR) from the atmosphere to mitigate anthropogenic climate change. ERW aims at promoting soil inorganic sequestration by accelerating geochemical processes. Theoretically, may also impact organic (SOC), largest pool in terrestrial ecosystems, but experimental evidence this largely lacking. Here, we conducted a 2‐year field experiment tropical rubber plantations southeast of China evaluate effects wollastonite powder additions (0, 0.25, and 0.5 kg m −2 ) on both 0–10 cm depth. We found that significantly increased concentration SOC HCO 3 − , increases were four eight times higher than with low‐ high‐level applications. had positive accrual mineral‐associated matter (MAOM) macroaggregate fractions, not particulate matter. Path analysis suggested MAOM mainly increasing release Ca, Si, Fe, lesser extent stimulating root growth microbial‐derived inputs. Our study indicates can promote stable MOAM surface soils through mineral pump microbial pump. These have been larger CDR during our experiment. argue it essential account responses assessments ERW.

Language: Английский

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Quantifying soil accumulation of atmospheric mercury using fallout radionuclide chronometry

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: June 26, 2024

Abstract Soils are a principal global reservoir of mercury (Hg), neurotoxic pollutant that is accumulating through anthropogenic emissions to the atmosphere and subsequent deposition terrestrial ecosystems. The fate Hg in soils remains uncertain, however, particularly what degree re-emitted back as gaseous elemental (GEM). Here we use fallout radionuclide (FRN) chronometry directly measure accumulation rates soils. By comparing these with measured atmospheric fluxes mass balance approach, show representative Arctic, boreal, temperate, tropical quantitatively efficient at retaining Hg. Potential for significant GEM re-emission appears limited minority coniferous soils, calling into question models assume strong legacy from FRN poses powerful tool reconstruct across larger spatial scales than previously possible, while offering insights susceptibility mobilization different soil environments.

Language: Английский

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Controls and relationships of soil organic carbon abundance and persistence vary across pedo‐climatic regions

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(5)

Published: May 1, 2024

Abstract One of the largest uncertainties in terrestrial carbon cycle is timing and magnitude soil organic (SOC) response to climate vegetation change. This uncertainty prevents models from adequately capturing SOC dynamics challenges assessment management change effects on soils. Reducing these requires simultaneous investigation factors controlling amount (SOC abundance) duration persistence) stored C. We present a global synthesis radiocarbon profiles (n Profile = 597) assess timescales storage. use combination statistical depth‐resolved compartment explore key relationships between abundance persistence across pedo‐climatic regions with depth. allows us better understand (i) how covary (ii) depth dependence relates climatic mineralogical controls persistence. show that are differently related; differ substantially major For example, large amounts persistent can reflect constraints soils (e.g., tundra/polar regions) or mineral absorption, reflected slower decomposition vertical transport rates. In contrast, lower be found highly weathered tropical soils) higher drier less productive regions). relate variable patterns differences processes constraining plant C input, microbial decomposition, stabilization potential. process‐oriented grouping provides valuable benchmark for models, highlighting boundary conditions crucial predicting future

Language: Английский

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Combination of Biochar‐Based Fertilisers and Reactive Barriers Improved Soil Carbon Storage, Soil Moisture Retention, and Crop Yield in Short Term

GCB Bioenergy, Journal Year: 2025, Volume and Issue: 17(3)

Published: Feb. 19, 2025

ABSTRACT Climate change threatens long‐term soil health because of increased severity and frequency drought periods. Applying biochar to soils before a can increase non‐biochar carbon (C) water storage over the long term sustain crop yield. However, on‐farm benefit buried solid applied liquid at low rates remains uncertain. This study examined effects two novel biochar‐based amendments on C, The included reactive barrier (RB) made by layering wood‐based biochar, straw mulch cow manure into series open surface trenches, mineral complex (BMC) twice, rate (200 kg ha −1 ) one side RB (fertilised area), while other received no treatments (non‐fertilised area). Moisture concentration within ranged from 6.76% up 56.68% after large rainfall, more than double surrounding gradually started migrating outwards. Soil 50 cm distance showed 24.5% in C compared with 600 RB, 2.54% versus 2.04%, respectively, non‐fertilised area, which was supported lowering microbial activity. Pasture yield associated BMC fertiliser rather proximity RB. 44% higher fertilised area 27.89 t 19.31 . Approximately 158 CO 2 e removed atmosphere for each cubic meter an annual removal 150 estimated application. Income earned still profitable even though could cost between USD 400–520 including shipping costs. Overall, our suggested fertilisers effectively moisture retention building soil. adoption techniques has potential improve resilience increasing wide range non‐irrigated cropping systems.

Language: Английский

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Paleoclimate contributes to soil carbon storage in subtropical shrublands

Agricultural and Forest Meteorology, Journal Year: 2025, Volume and Issue: 368, P. 110528 - 110528

Published: April 6, 2025

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The carbon sequestration efficiency of conservation agriculture is constrained by initial carbon contents and duration: Evidence from a meta-analysis of experimental data in China

CATENA, Journal Year: 2025, Volume and Issue: 255, P. 109058 - 109058

Published: April 19, 2025

Language: Английский

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Whole‐Profile Soil Carbon Responses to Climate Change Modulated by Vertical Carbon Transport and Priming Effect Gradients

Journal of Advances in Modeling Earth Systems, Journal Year: 2025, Volume and Issue: 17(4)

Published: April 1, 2025

Abstract The vertical transport (VT) of soil organic carbon (SOC) mixes pools varying depth‐origin and decomposability, regulating whole‐profile SOC dynamics through altered pool interactions, such as the priming effect (PE). However, quantifying this process in situ is challenging. Using global data sets on stocks inputs, we trained a depth‐resolved model incorporating VT PE to assess gradient PE, explore their roles response climate change. results indicate that VT‐induced redistribution essential for capturing observed profile distribution stocks. Transported from neighboring layers accounted 8%–27% total layer‐specific by depth ecosystem type, regulated turnover behavior via especially deeper layers. Precipitation emerged most important factor influencing VT. While was higher upper layers, it far its maximum potential making these more sensitive input changes. If gradients are not considered, sensitivity warming will be underestimated, impact changes overestimated, particularly Our findings highlight critical role controlling dynamics, underscoring need explicitly include processes Earth system models reliable predictions under

Language: Английский

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Bioturbation in very deep tropical Ferralsols: A micromorphological study of biomantles

CATENA, Journal Year: 2025, Volume and Issue: 256, P. 109084 - 109084

Published: May 1, 2025

Language: Английский

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