Detection and quantification of CO2 seepage in seawater using the stoichiometric Cseep method: Results from a recent subsea CO2 release experiment in the North Sea

Carbon Capture and Storage (CCS) is a potential significant mitigation strategy to combat climate change and ocean acidification. The technology is well understood but its current implementation must be scaled up nearly by a hundredfold to become an effective tool that helps meet mitigation targets....

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Autores: Omar, Abdirahman M., García-Ibáñez, Maribel I., Schaap, Allison, Oleynik, Anna, Esposito, Mario, Jeansson, Emil, Loucaides, Socratis, Thomas, Helmuth, Alendal, Guttorm
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/415611
Acceso en línea:http://hdl.handle.net/10261/415611
https://api.elsevier.com/content/abstract/scopus_id/85099977629
Access Level:acceso abierto
Palabra clave:Subsea CO2 release
Baseline C establishment
CO2 seepage detection
Seafloor CO2 seepage monitoring
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spelling Detection and quantification of CO2 seepage in seawater using the stoichiometric Cseep method: Results from a recent subsea CO2 release experiment in the North SeaOmar, Abdirahman M.García-Ibáñez, Maribel I.Schaap, AllisonOleynik, AnnaEsposito, MarioJeansson, EmilLoucaides, SocratisThomas, HelmuthAlendal, GuttormSubsea CO2 releaseBaseline C establishmentCO2 seepage detectionSeafloor CO2 seepage monitoringCarbon Capture and Storage (CCS) is a potential significant mitigation strategy to combat climate change and ocean acidification. The technology is well understood but its current implementation must be scaled up nearly by a hundredfold to become an effective tool that helps meet mitigation targets. Regulations require monitoring and verification at storage sites, and reliable monitoring strategies for detection and quantification of seepage of the stored carbon need to be developed. The Cseep method was developed for reliable determination of CO2 seepage signal in seawater by estimating and filtering out natural variations in dissolved inorganic carbon (C). In this work, we analysed data from the first-ever subsea CO2 release experiment performed in the north-western North Sea by the EU STEMM−CCS project. We successfully demonstrated the ability of the Cseep method to (i) predict natural C variations around the Goldeneye site over seasonal to interannual time scales; (ii) establish a process-based baseline C concentration with minimal variability; (iii) determine CO2 seepage detection threshold (DT) to reliably differentiate released−CO2 signal from natural variability and quantify released−CO2 dissolved in the sampled seawater. DT values were around 20 % of the natural C variations indicating high sensitivity of the method. Moreover, with the availability of DT value, the identification of released−CO2 required no pre-knowledge of seepage occurrence, but we used additional available information to assess the confidence of the results. Overall, the Cseep method features high sensitivity, automation suitability, and represents a powerful future monitoring tool both for large and confined marine areas.This work has received funding from the European Union’s Horizon 2020 research and innovation programme (contract No. 654462, STEMM-CCS), the ACT programme (Accelerating CCS Technologies, Horizon2020 project No 294766, the ACTOM project), and the Research Council of Norway (Project No. 254711, BayMoDe). H. Thomas acknowledges support by the German Academic Exchange Service (DAAD, #57429828) from funds of the German Federal Ministry of Education and Research (BMBF)Peer reviewedElsevierEuropean CommissionResearch Council of NorwayGerman Academic Exchange ServiceFederal Ministry of Education and Research (Germany)Omar, Abdirahman M. [0000-0001-6778-5891]García-Ibáñez, Maribel I. [0000-0001-5218-0064]202620262021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/415611https://api.elsevier.com/content/abstract/scopus_id/85099977629reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/H2020/654462info:eu-repo/grantAgreement/EC/H2020/294766https://doi.org/10.1016/j.ijggc.2021.103310Noinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4156112026-05-22T06:33:51Z
dc.title.none.fl_str_mv Detection and quantification of CO2 seepage in seawater using the stoichiometric Cseep method: Results from a recent subsea CO2 release experiment in the North Sea
title Detection and quantification of CO2 seepage in seawater using the stoichiometric Cseep method: Results from a recent subsea CO2 release experiment in the North Sea
spellingShingle Detection and quantification of CO2 seepage in seawater using the stoichiometric Cseep method: Results from a recent subsea CO2 release experiment in the North Sea
Omar, Abdirahman M.
Subsea CO2 release
Baseline C establishment
CO2 seepage detection
Seafloor CO2 seepage monitoring
title_short Detection and quantification of CO2 seepage in seawater using the stoichiometric Cseep method: Results from a recent subsea CO2 release experiment in the North Sea
title_full Detection and quantification of CO2 seepage in seawater using the stoichiometric Cseep method: Results from a recent subsea CO2 release experiment in the North Sea
title_fullStr Detection and quantification of CO2 seepage in seawater using the stoichiometric Cseep method: Results from a recent subsea CO2 release experiment in the North Sea
title_full_unstemmed Detection and quantification of CO2 seepage in seawater using the stoichiometric Cseep method: Results from a recent subsea CO2 release experiment in the North Sea
title_sort Detection and quantification of CO2 seepage in seawater using the stoichiometric Cseep method: Results from a recent subsea CO2 release experiment in the North Sea
dc.creator.none.fl_str_mv Omar, Abdirahman M.
García-Ibáñez, Maribel I.
Schaap, Allison
Oleynik, Anna
Esposito, Mario
Jeansson, Emil
Loucaides, Socratis
Thomas, Helmuth
Alendal, Guttorm
author Omar, Abdirahman M.
author_facet Omar, Abdirahman M.
García-Ibáñez, Maribel I.
Schaap, Allison
Oleynik, Anna
Esposito, Mario
Jeansson, Emil
Loucaides, Socratis
Thomas, Helmuth
Alendal, Guttorm
author_role author
author2 García-Ibáñez, Maribel I.
Schaap, Allison
Oleynik, Anna
Esposito, Mario
Jeansson, Emil
Loucaides, Socratis
Thomas, Helmuth
Alendal, Guttorm
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv European Commission
Research Council of Norway
German Academic Exchange Service
Federal Ministry of Education and Research (Germany)
Omar, Abdirahman M. [0000-0001-6778-5891]
García-Ibáñez, Maribel I. [0000-0001-5218-0064]
dc.subject.none.fl_str_mv Subsea CO2 release
Baseline C establishment
CO2 seepage detection
Seafloor CO2 seepage monitoring
topic Subsea CO2 release
Baseline C establishment
CO2 seepage detection
Seafloor CO2 seepage monitoring
description Carbon Capture and Storage (CCS) is a potential significant mitigation strategy to combat climate change and ocean acidification. The technology is well understood but its current implementation must be scaled up nearly by a hundredfold to become an effective tool that helps meet mitigation targets. Regulations require monitoring and verification at storage sites, and reliable monitoring strategies for detection and quantification of seepage of the stored carbon need to be developed. The Cseep method was developed for reliable determination of CO2 seepage signal in seawater by estimating and filtering out natural variations in dissolved inorganic carbon (C). In this work, we analysed data from the first-ever subsea CO2 release experiment performed in the north-western North Sea by the EU STEMM−CCS project. We successfully demonstrated the ability of the Cseep method to (i) predict natural C variations around the Goldeneye site over seasonal to interannual time scales; (ii) establish a process-based baseline C concentration with minimal variability; (iii) determine CO2 seepage detection threshold (DT) to reliably differentiate released−CO2 signal from natural variability and quantify released−CO2 dissolved in the sampled seawater. DT values were around 20 % of the natural C variations indicating high sensitivity of the method. Moreover, with the availability of DT value, the identification of released−CO2 required no pre-knowledge of seepage occurrence, but we used additional available information to assess the confidence of the results. Overall, the Cseep method features high sensitivity, automation suitability, and represents a powerful future monitoring tool both for large and confined marine areas.
publishDate 2021
dc.date.none.fl_str_mv 2021
2026
2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/415611
https://api.elsevier.com/content/abstract/scopus_id/85099977629
url http://hdl.handle.net/10261/415611
https://api.elsevier.com/content/abstract/scopus_id/85099977629
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
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#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/H2020/654462
info:eu-repo/grantAgreement/EC/H2020/294766
https://doi.org/10.1016/j.ijggc.2021.103310
No
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
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