152 results for group: carbon-sequestration-1
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 reducti...
Multiple Lines of Evidence Reveal Rapid, Seasonal Watershed Responses to Enhanced Weathering
Fengchao Sun, Robert Rioux, Tim Suhrhoff, Wyatt Tatge, Boriana Kalderon-Asael, Quinn Zacharias, William Miller-Brown, Aaron MacDonald, Esmeralda Garcia, Jamie Shanley, Peter Raymond, Noah Planavsky, James Saiers
ABSTRACT:
Enhanced rock weathering (ERW) is a natural carbon dioxide removal (CDR) approach that captures CO2 by accelerating silicate weathering using crushed rocks. A major question on the efficacy of ERW is how fast and efficient it is at transporting the products of weathering to drainage networks, and ultimately the ocean. Using a novel whole watershed experiment, we report multiple lines of evidence of rapid and pronounced streamwater ...
Direct In Situ Measurement of Alkalinity Export for Real-Time Enhanced Weathering MRV
Andrew Muth, Jonte Boysen, Pascal Michel
ABSTRACT:
Accurate quantification of alkalinity export from the near-field zone remains a key bottleneck for monitoring, reporting, and verification (MRV) of carbon dioxide removal (CDR) through Enhanced Weathering (EW). Here we validate the Everest Pulsar, a field-deployable alkalinity sensor that accumulates total alkalinity (TA) using a weak acid ion-exchange resin and transduces resin saturation into a digital, in situ measurement. In a 7-day continuous-flow soil column experiment (10 no-soil, 5 soil units), the sensor quantitatively retained incoming alkalinity, with capture efficiencies of 98.9% ...
LEAVE NO STONE UNTURNED: THE IMPORTANCE OF ROCK CHOICE FOR SCALING ENHANCED WEATHERING FOR CARBON DIOXIDE REMOVAL
Maurice Bryson
SUMMARY:
The devastating effects of breaching climatic tipping points and our current greenhouse gas emissions trajectory mean that society
must rapidly decarbonize and durably and safely remove and store carbon dioxide (CO2) at an unprecedented scale. To reduce
atmospheric CO2 concentrations to pre-industrial levels, the carbon dioxide removal (CDR) industry will have to remove
approximately 1,000 billion tonnes of CO2 from the atmosphere.
What options do we have to tackle this seemingly intractable problem and reach climate-relevant scales of CDR? One promising
solution uses rocks and rain to durably remove and store atmosphe...
Long-term carbon dioxide removal potential from the application of wood biochar and basanite rock powder in sandy soil using the LiDELSv2 process-based modeling approach
Mikita Maslouski, Maria Ansari, Susanne E Hamburger, Johannes Meyer zu Drewer, Nikolas Hagemann, Annette Eschenbach, Christian Beer, Joscha N Becker, Claudia I Kammann, Maria-Elena Vorrath, Philipp Porada
ABSTRACT:
The rise in atmospheric carbon dioxide (CO2) concentrations requires scalable and effective carbon dioxide removal (CDR) strategies. pyrogenic carbon capture and storage relies on the pyrolysis of biomass and the non-oxidative use of biochar, e.g. in soils. Enhanced rock weathering (ERW) captures CO2 by forming dissolved bicarbonate. In addition to CDR, both methods may offer soil improvement as a co-benefit. However, their interaction ...
Cropland enhanced weathering in low GDP regions for gigaton scale carbon removal with potential economic co-benefits
Bingzheng Wang, Fengqi You
ABSTRACT:
Enhanced rock weathering (ERW) applies crushed silicate rocks like basalt to croplands and offers significant potential for atmospheric carbon dioxide removal (CDR). Here, we explored the potential of ERW as a bridge for sharing decarbonization responsibilities, with less-developed regions contributing cropland deployment and more developed regions providing financial support, thereby enhancing equity in global decarbonization. Low GDP regions (bottom 50% GDP administrative region as a case) in major global economies contribute 55%–89% of the total national or continental ERW decarbonization potential. ...
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...
