CO₂-removal News

Miao et al. (2022): Minimizing the effect of oxygen on supported polyamine for direct air capture

Yihe Miao, Yaozu Wang, Xuancan Zhu, Wei Chen, Zhijun He, Lijun Yu, Jia Li IN: Separation and Purification Technology Vol 298, 121583,

This work comprehensively investigated the effect of oxygen in the air on the selectivity of polyamine-functionalized adsorbents towards CO2 in the adsorption process and the oxidative stability in the desorption process. Results indicate high selectivity toward CO2 and oxidative resistance of adsorbents can be realized by accurately controlling the operating temperature.


Cox et al. (2022): Deliberating enhanced weathering: public frames, iconic ecosystems, and the governance of carbon removal at scale

Emily Cox, Elspeth Spence, Nicholas Pidgeon IN: Public Understanding of Science, SAGE Publications (UK and US), University of Cardiff

Public perceptions of ERW and its wider social and environmental implications will be a critical factor determining its potential; the authors use six two-day deliberative workshops in England, Wales and Illinois to understand public views. Consideration of ERW deployment in tropical countries led participants to frame it from a social justice perspective, which had been much less prevalent when considering Western agricultural contexts, and generated assumptions of increased scale, which heightened concerns about detrimental social and environmental impacts.


Why we need a code of conduct for ocean-based carbon dioxide removal

Ken Buesseler, Margaret Leinen, Kilaparti Ramakrishna, Fei Chai, Sarah Smith, Mark Wells, Joo-Eun Yoon on World Economic Forum

The Code of Conduct put forward by the Exploring Ocean Iron Solutions forum is out: both published in Nature (paywall) and World Economic Forum. The team is proposing it as a foundation to help guide research into any ocean- or land-based CDR strategy.

Ken Buesseler, Margaret Leinen, Kilaparti Ramakrishna (2022): Removing carbon dioxide: first, do no harm IN: Nature 606, 864 (2022), doi:

Postdoc (m/f/d) in climate uncertainty and CDR interlinkage assessment using Earth system modelling and statistical analyses

Deadline: 1st July 2022

The research unit Marine Biogeochemistry of the research division Biogeochemical Modelling (GEOMAR Helmholtz Centre for Ocean Research Kiel) is offering a postdoc position starting on September 1st, 2022. The research will involve working as part of an interdisciplinary team where the scientist is expected to provide expertise on modelling CDR approaches. Initial work will involve usage of the newest version of an Earth system model of intermediate complexity (UVic ESCM) to perform a biogeochemical and physical parameter perturbation experiment for temperature stabilisation scenarios to assess the uncertainty space in these underexplored scenarios. Furthermore, the Postdoc will assess the impact of various CDR measures by explicitly including them in these simulations. Finally, the interlinkages (i.e., additionality and trade-offs) of CDR measures will be assessed using statistical analysis tools.


Postdoc (m/f/d) in assessment of climate forcing impact of CDR measures using IAM data and Earth system modelling

Deadline: 1st July 2022

The research unit Marine Biogeochemistry of the research division Biogeochemical Modelling (GEOMAR Helmholtz Centre for Ocean Research Kiel) is offering a postdoc position. The postdoc will utilise integrated assessment modelling data and newest literature findings of emerging Carbon Dioxide Removal (CDR) measures to conduct life cycle assessments of the complete forcing footprints of currently proposed CDR measures. The assessment includes greenhouse gas and aerosol emissions and other climate forcing impacts of CDR measures. Using this forcing data, the climate forcing footprints of the CDR measures are estimated using an Earth system model of intermediate complexity. Assessing the overall climate impact of CDR measures over time allows us to understand their overall efficacy and their ability to compensate other anthropogenic activities.


Koweek (2022): Expected Limits on the Potential for Carbon Dioxide Removal From Artificial Upwelling

David A. Koweek IN: Front. Mar. Sci., 29 June 2022,

This work examines the question: Can pumping of nutrient-rich water from the deep ocean to the surface draw down CO2? The modelling study concludes that artificial upwelling is probably not likely to drawdown much CO2, resulting in very small estimates of CDR potential. Moreover, additional production supported by bringing new nutrients to the surface is almost completely offset by the release of CO2 from deep ocean water.


Frontier facilitates carbon removal purchases


„Earlier this year, Stripe, Alphabet, Shopify, Meta, and McKinsey Sustainability launched Frontier, an advance market commitment to accelerate the development of carbon removal technologies. A few months later, after careful review from an advisory panel of 19 scientists and industry experts, Frontier has facilitated its first purchases—from AspiraDAC, Calcite-Origen, Lithos Carbon, RepAir, Travertine, and Living Carbon—on behalf of Stripe.“