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....
Published in: | International Journal of Greenhouse Gas Control |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2021
|
Subjects: | |
Online Access: | https://hdl.handle.net/11250/2992692 https://doi.org/10.1016/j.ijggc.2021.103310 |
id |
ftunivbergen:oai:bora.uib.no:11250/2992692 |
---|---|
record_format |
openpolar |
spelling |
ftunivbergen:oai:bora.uib.no:11250/2992692 2023-05-15T17:51:51+02:00 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 García-Ibáñez, Maribel I. Schaap, Allison Oleynik, Anna Esposito, Mario Jeansson, Emil Loucaides, Socratis Thomas, Helmuth Alendal, Guttorm 2021 application/pdf https://hdl.handle.net/11250/2992692 https://doi.org/10.1016/j.ijggc.2021.103310 eng eng Elsevier Norges forskningsråd: 254711 EC/H2020/294766 EC/H2020/654462 urn:issn:1750-5836 https://hdl.handle.net/11250/2992692 https://doi.org/10.1016/j.ijggc.2021.103310 cristin:1909652 International Journal of Greenhouse Gas Control. 2021, 108, 103310. Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2021 The Author(s) 103310 International Journal of Greenhouse Gas Control 108 Journal article Peer reviewed 2021 ftunivbergen https://doi.org/10.1016/j.ijggc.2021.103310 2023-03-14T17:43:56Z 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. publishedVersion Article in Journal/Newspaper Ocean acidification University of Bergen: Bergen Open Research Archive (BORA-UiB) International Journal of Greenhouse Gas Control 108 103310 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
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. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Omar, Abdirahman García-Ibáñez, Maribel I. Schaap, Allison Oleynik, Anna Esposito, Mario Jeansson, Emil Loucaides, Socratis Thomas, Helmuth Alendal, Guttorm |
spellingShingle |
Omar, Abdirahman García-Ibáñez, Maribel I. Schaap, Allison Oleynik, Anna Esposito, Mario Jeansson, Emil Loucaides, Socratis Thomas, Helmuth Alendal, Guttorm 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 |
author_facet |
Omar, Abdirahman García-Ibáñez, Maribel I. Schaap, Allison Oleynik, Anna Esposito, Mario Jeansson, Emil Loucaides, Socratis Thomas, Helmuth Alendal, Guttorm |
author_sort |
Omar, Abdirahman |
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 |
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 |
publisher |
Elsevier |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2992692 https://doi.org/10.1016/j.ijggc.2021.103310 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
103310 International Journal of Greenhouse Gas Control 108 |
op_relation |
Norges forskningsråd: 254711 EC/H2020/294766 EC/H2020/654462 urn:issn:1750-5836 https://hdl.handle.net/11250/2992692 https://doi.org/10.1016/j.ijggc.2021.103310 cristin:1909652 International Journal of Greenhouse Gas Control. 2021, 108, 103310. |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2021 The Author(s) |
op_doi |
https://doi.org/10.1016/j.ijggc.2021.103310 |
container_title |
International Journal of Greenhouse Gas Control |
container_volume |
108 |
container_start_page |
103310 |
_version_ |
1766159121283809280 |