156 results for group: carbon-sequestration-1
Carbon dioxide removal during dissolution of granular basalt: A mass balance test of enhanced rock weathering at the hillslope scale
Charles J. Cunningham, Andrew Guertin, Marine Gelin, Louis A. Derry, Hannes H. Bauser, Minseok Kim, Jennifer L. Druhan, Scott Saleska, Peter A. Troch, Jon Chorover
ABSTRACT:
Enhanced rock weathering (ERW) is proposed as a carbon dioxide removal (CDR) strategy that sequesters carbon through the carbonic acid-promoted dissolution of ground silicate rocks. Studies have explored the efficacy of ERW through geochemical models and bench-scale reactors, but field-scale experimentation is limited. A year-long, replicated study was conducted at the Landscape Evolution Observatory (LEO) at Biosphere 2 to quantify basaltic CDR at the hillslope scale. LEO ...
Optimizing nutrient stoichiometry for enhanced carbon sequestration in agricultural soils
Munazza Yousra, Qaiser Hussain, Khalid Saifullah Khan, Sair Sarwar, Muhammad Mahmood-ul-Hassan
ABSTRACT:
Nutrients like nitrogen (N), phosphorus (P), and sulphur (S) play a critical role in plant and microbial growth, as well as in stabilizing soil organic carbon (SOC). Humus, the most stable fraction of soil organic matter (SOM), maintains a consistent elemental ratio of C:N:P:S at 10,000:833:200:143. To evaluate how variations in this humus based C:N:P:S ratio affect SOC stabilization, a six-month laboratory incubation was conducted using selected benchmark soil series. The soils were amended with wheat straw (WS) and maize straw (MS), both with ...
Leveraging ecosystems responses to enhanced rock weathering in mitigation scenarios
Yann Gaucher, Katsumasa Tanaka, Daniel J. A. Johansson, Daniel S. Goll, Philippe Ciais
ABSTRACT:
Carbon dioxide removal (CDR) is deemed necessary to attain the Paris Agreement’s climate objectives. While bioenergy with carbon capture and storage (BECCS) has generated substantial attention, sustainability concerns have led to increased examination of alternative strategies, including enhanced rock weathering (EW). We analyse the role of EW under cost-effective mitigation pathways, by including the CDR potential of basalt applications from silicate weathering (geochemical CDR) and enhanced ecosystem growth and carbon storage in response to phospho...
Bridging time lags in durable carbon removal on working lands
Noah J. Planavsky, Beck J. Woollen, Ella Milliken, Mojtaba Fakhraee, David J. Beerling, Christopher T. Reinhard
ABSTRACT:
Enhanced weathering and biochar application on working lands show promising signs of delivering durable carbon dioxide removal required to meet internationally agreed upon climate change mitigation goals. Although both technologies can scale comparatively quickly, their ability to offset radiative forcing from anthropogenic greenhouse gas emissions is delayed by time lags between deployment and realized carbon removal. Here, we suggest that coupling enhanced weathering and biochar with point-source methane emissions reductions ...
Atmospheric carbon dioxide mineralisation in anthropogenically-derived carbonate deposits
John MacDonald, Charlotte Slaymark, Amanda Stubbs, Marta Kalabová
ABSTRACT:
Removing carbon dioxide from the atmosphere is important in minimising the impact of anthropogenically-induced climate change. Anthropogenic geomaterials, such as slag and cement, can be utilised in an engineered context for mineralising CO2. However, such anthropogenic geomaterials, typically waste products, were usually deposited on the land surface and left to passively mineralise CO2, resulting in the formation of anthropogenic carbonates. In this study, we document anthropogenic carbonates from a suite of locations across Scotland and Northern England, and use stable ...
An Analysis of Soil CO₂ Efflux and Leachate Alkalinity Data
Dirk Paessler, Jens Hammes, Anna Anke Stöckel, Ralf Steffens, Ingrid Smet
ABSTRACT:
In order to better understand Enhanced Weathering (EW) we ran an extensive greenhouse experiment with more than 400 pots with grass plants (Lollium perenne) for 24 months throughout 2023-2024. Every month we measured multiple parameters in the soil leachate water (total alkalinity (TA), pH, electrical conductivity (EC), and cations) as well as soil CO₂ effluxes.
With a focus on carbon transport we present here the data from 67 rock-soil variations with 4 replicates each, based on the lab results from 6,500 leachate samples and almost 1 million CO₂ efflux ...
Divergent responses of carbon and nitrogen functional genes composition to enhanced rock weathering
Qiong Chen, Daniel S. Goll, Mardin Abdalqadir, Xinjian He, Guochen Li, Boyuan Bi, Tongtong Xu, Chenlu Li, Yanlong Chen, Xiulian Ma, Zhenxin Li, Yunting Fang, Zhanqing Hao & Zuoqiang Yuan
ABSTRACT:
Enhanced rock weathering (ERW) is a scalable strategy for atmospheric carbon dioxide removal. The microbiome function critically regulates the below-ground cycle of carbon and nitrogen in terrestrial ecosystems. However, microbial functioning related to carbon and nitrogen under ERW remains elusive. Here we investigated how wollastonite addition affects key microbial carbon and nitrogen-cycles genes investigated using metagenomic, in a tropic rubber ...
Limited carbon sequestration potential from global ecosystem restoration
Csaba Tölgyesi, Nándor Csikós, Vicky M. Temperton, Elise Buisson, Fernando A. O. Silveira, Caroline E. R. Lehmann, Péter Török, Zoltán Bátori, Ákos Bede-Fazekas
ABSTRACT:
Ecosystem restoration is increasingly recognized as a means of climate change mitigation. Recent global-scale studies have suggested that ecosystem restoration could offset a substantial fraction of human carbon emissions since the Industrial Revolution. However, global carbon sequestration potential remains uncertain due to the tree-centric view of some models and difficulties in modelling restoration across different ecosystem types. Here we applied a model-based ...
Increased soil CO2 emissions after basalt amendment were partly offset by biochar addition in an urban field experiment
Jennifer Newell,Rory Doherty, Gary Lyons
ABSTRACT:
Enhanced weathering (EW) and biochar amendment are proposed carbon dioxide removal (CDR) techniques with potential co-benefits for soil health and plant productivity. However, knowledge gaps remain regarding their impacts on soil carbon dynamics and heavy metal mobility. This study investigates the effects of basalt and biochar amendments on soil CO2 efflux (SCE), soil base cation dynamics, biomass yield and heavy metal uptake in clover (Trifolium pratense) and mustard (Brassica juncea) field plots. Despite potential CO2 uptake through weathering, we found that basalt increased SCE in both crops, ...
