Monat: Februar 2023

Peer-reviewed Publications

Müller et al. (2023): Decadal Trends in the Oceanic Storage of Anthropogenic Carbon from 1994 to 2014

Jens Daniel Müller, Nicolas Gruber, Brendan R. Carter, Richard A. Feely, Masao Ishii, Nico Lange, Siv K Lauvset, Akihiko M. Murata, Are Olsen, Fiz F. Pérez, Christopher L. Sabine, Toste Tanhua, Rik Wanninkhof, Donghe Zhu IN: Authorea, DOI: 10.22541/essoar.167525217.76035050/v1

The oceanic storage of anthropogenic CO2 (Cant) that humans have emitted into the atmosphere has been pivotal for counteracting climate change. Yet multi-decadal trends in the ocean interior storage of Cant have not been assessed at global scale. Here, the authors determine storage changes of Cant by applying the eMLR(C*) regression method to ocean interior observations collected between 1989 and 2020. The authors find that the global ocean storage of Cant grew by 29 ± 3 Pg C dec-1 and 27 ± 3 Pg C dec-1 (±1σ) from 1994 to 2004 and 2004 to 2014, respectively.

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Calls

Climate Vault Announces Request For Carbon Removal Proposals

Deadline March 29, 2023

Climate Vault is set to fund up to 860,000 tons of carbon dioxide removal (CDR) and is inviting companies in the nascent industry to apply for grants. This is the first Climate Vault Request For Proposals (RFP) of 2023 and its process will find, evaluate and award funds to companies that can provide carbon removal through any of these three categories:

  • Terrestrial processes that include ecological, agricultural, biological, plant cultivar, and soil carbon ecosystems.
  • Technological innovations, such as bioenergy with carbon capture and storage (BECCS), direct air capture (DAC), ex situ and in situ mineralization, and soil additions.
  • Oceanic-based processes, including ocean alkalinity enhancement (OAE) and abiotic, electrolytic, biotic, blue carbon, and macroalgae systems.

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Reports

Enhanced Rock Weathering in the Global South: Exploring Potential for Enhanced Agricultural Productivity and Carbon dioxide Drawdown

F. Garrett Boudinot, Gabrielle Dreyfus, Caitlan Frederick, Yifan Powers (Precision Development (PxD) and the Institute for Governance & Sustainable Development (IGSD)); January 2023; 42 pp.

The authors aim to identify opportunities in agriculture with potential benefits for smallholder farmers, either directly or through compensation mechanisms for their environmental services, as well as for GHG mitigation. In identifying these opportunities, the authors will outline the evidence for impact on farmers‘ outcomes and on GHG-mitigation outcomes as well as address challenges in building that evidence, particularly in outcome measurement methods. They will also address practical next steps to build a pathway to scale for the identified opportunities.

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Peer-reviewed Publications

Baveye (2023): Review – Unknown economic costs of biochar applications to soils: They should be considered in the on-going debate

Philippe C. Baveye IN: Resources, Conservation and Recycling 192, 106911, https://doi.org/10.1016/j.resconrec.2023.106911

While the addition of biochar to soils may have some beneficial consequences in terms of water availability to plants, basic soil physics principles also indicate that biochar additions may bring potential risks to soils in areas with heavy rainfall. The latter is particularly relevant at this juncture because, as a result of climate change, climatologists already observe that rainfall events are becoming progressively less frequent but more intense, and the trend is expected to strengthen considerably in the future.

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Peer-reviewed Publications

Abdullatif et al. (2023): Emerging trends in direct air capture of CO2: a review of technology options targeting net-zero emissions

Yasser Abdullatif, Ahmed Sodiq, Namra Mir, Yusuf Bicer, Tareq Al-Ansari, Muftah H. El-Naas, Abdulkarem I. Amhamed IN: (Review Article) RSC Adv. 13, 5687-5722; DOI: 10.1039/D2RA07940B

This review focuses on emerging trends in direct air capture (DAC) of CO2, the main drivers of DAC systems, and the required development for commercialization. The main findings point to undeniable facts that DAC’s overall system energy requirement is high, and it is the main bottleneck in DAC commercialization.

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Peer-reviewed Publications

Hartmann et al. (2023): Stability of alkalinity in ocean alkalinity enhancement (OAE) approaches – consequences for durability of CO2 storage

Jens Hartmann, Niels Suitner, Carl Lim, Julieta Schneider, Laura Marín-Samper, Javier Arístegui, Phil Renforth, Jan Taucher, Ulf Riebesell IN: Biogeosciences, 20, 781–802, https://doi.org/10.5194/bg-20-781-2023

In order to address the application of alkaline solution as well as fine particulate alkaline solids, a set of six experiments was performed using natural seawater with alkalinity of around 2400 µmol kgsw−1. The results indicate that using an alkaline solution instead of reactive alkaline particles can avoid carbonate formation, unless alkalinity addition via solutions shifts the system beyond critical supersaturation levels. To avoid the loss of alkalinity and dissolved inorganic carbon (DIC) from seawater, the application of reactor techniques can be considered. These techniques produce an equilibrated solution from alkaline solids and CO2 prior to application.

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German News

Wenn Bauern gegen den Klimawandel anpflügen

von Tobias Kaiser, welt.de, 17.02.2023

„Landwirte machen längst nicht nur mit Anbau und Viehzucht Geschäft. Schon jetzt fließt Geld, wenn sie Flächen brachliegen lassen. Nun soll noch die Speicherung von CO₂ im Boden dazukommen. Experten warnen, denn am Ende könnte die Idee sogar zu mehr Emissionen führen.“

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Events

Fish, Fisheries, and Carbon virtual workshop

6, 8, and 9 March 2023 

The primary aims of this workshop are to:

  • showcase emerging research by the international community on the interactions between fish and the carbon cycle, and the potential impacts of fisheries on carbon stores
  • explore the natural science and societal research that is needed to develop and implement policy to protect the role of fish in ocean carbon cycles

The workshop is open to all stakeholders, including NGOs, civil servants, fishers, food industry and researchers. There is no fee to register or attend. The workshop will occur virtually over three dates, all at different times to encourage global participation. All sessions will be recorded and made available after the workshop.

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