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An inter-model assessment of the role of direct air capture in deep mitigation pathways

The feasibility of large-scale biological CO(2) removal to achieve stringent climate targets remains unclear. Direct Air Carbon Capture and Storage (DACCS) offers an alternative negative emissions technology (NET) option. Here we conduct the first inter-model comparison on the role of DACCS in 1.5 a...

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Autores principales: Realmonte, Giulia, Drouet, Laurent, Gambhir, Ajay, Glynn, James, Hawkes, Adam, Köberle, Alexandre C., Tavoni, Massimo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6646360/
https://www.ncbi.nlm.nih.gov/pubmed/31332176
http://dx.doi.org/10.1038/s41467-019-10842-5
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author Realmonte, Giulia
Drouet, Laurent
Gambhir, Ajay
Glynn, James
Hawkes, Adam
Köberle, Alexandre C.
Tavoni, Massimo
author_facet Realmonte, Giulia
Drouet, Laurent
Gambhir, Ajay
Glynn, James
Hawkes, Adam
Köberle, Alexandre C.
Tavoni, Massimo
author_sort Realmonte, Giulia
collection PubMed
description The feasibility of large-scale biological CO(2) removal to achieve stringent climate targets remains unclear. Direct Air Carbon Capture and Storage (DACCS) offers an alternative negative emissions technology (NET) option. Here we conduct the first inter-model comparison on the role of DACCS in 1.5 and 2 °C scenarios, under a variety of techno-economic assumptions. Deploying DACCS significantly reduces mitigation costs, and it complements rather than substitutes other NETs. The key factor limiting DACCS deployment is the rate at which it can be scaled up. Our scenarios’ average DACCS scale-up rates of 1.5 GtCO(2)/yr would require considerable sorbent production and up to 300 EJ/yr of energy input by 2100. The risk of assuming that DACCS can be deployed at scale, and finding it to be subsequently unavailable, leads to a global temperature overshoot of up to 0.8 °C. DACCS should therefore be developed and deployed alongside, rather than instead of, other mitigation options.
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spelling pubmed-66463602019-07-24 An inter-model assessment of the role of direct air capture in deep mitigation pathways Realmonte, Giulia Drouet, Laurent Gambhir, Ajay Glynn, James Hawkes, Adam Köberle, Alexandre C. Tavoni, Massimo Nat Commun Article The feasibility of large-scale biological CO(2) removal to achieve stringent climate targets remains unclear. Direct Air Carbon Capture and Storage (DACCS) offers an alternative negative emissions technology (NET) option. Here we conduct the first inter-model comparison on the role of DACCS in 1.5 and 2 °C scenarios, under a variety of techno-economic assumptions. Deploying DACCS significantly reduces mitigation costs, and it complements rather than substitutes other NETs. The key factor limiting DACCS deployment is the rate at which it can be scaled up. Our scenarios’ average DACCS scale-up rates of 1.5 GtCO(2)/yr would require considerable sorbent production and up to 300 EJ/yr of energy input by 2100. The risk of assuming that DACCS can be deployed at scale, and finding it to be subsequently unavailable, leads to a global temperature overshoot of up to 0.8 °C. DACCS should therefore be developed and deployed alongside, rather than instead of, other mitigation options. Nature Publishing Group UK 2019-07-22 /pmc/articles/PMC6646360/ /pubmed/31332176 http://dx.doi.org/10.1038/s41467-019-10842-5 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Realmonte, Giulia
Drouet, Laurent
Gambhir, Ajay
Glynn, James
Hawkes, Adam
Köberle, Alexandre C.
Tavoni, Massimo
An inter-model assessment of the role of direct air capture in deep mitigation pathways
title An inter-model assessment of the role of direct air capture in deep mitigation pathways
title_full An inter-model assessment of the role of direct air capture in deep mitigation pathways
title_fullStr An inter-model assessment of the role of direct air capture in deep mitigation pathways
title_full_unstemmed An inter-model assessment of the role of direct air capture in deep mitigation pathways
title_short An inter-model assessment of the role of direct air capture in deep mitigation pathways
title_sort inter-model assessment of the role of direct air capture in deep mitigation pathways
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6646360/
https://www.ncbi.nlm.nih.gov/pubmed/31332176
http://dx.doi.org/10.1038/s41467-019-10842-5
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