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dc.contributor.authorBlackford, Jerry
dc.contributor.authorAlendal, Guttorm
dc.contributor.authorAvlesen, Helge
dc.contributor.authorBrereton, Ashley
dc.contributor.authorCazenave, Pierre W
dc.contributor.authorChen, Baixin
dc.contributor.authorDewar, Marius
dc.contributor.authorHolt, Jason
dc.contributor.authorPhelps, Jack
dc.PublishedInternational Journal of Greenhouse Gas Control. 2020, 95:102949en_US
dc.description.abstractCarbon Capture and Storage has the potential to make a significant contribution to the mitigation of climate change, however there is a regulatory and societal obligation to demonstrate storage robustness and minimal local environmental impact. This requires an understanding of environmental impact potential and detectability of a range of hypothetical leak scenarios. In the absence of a significant body of real-world release experiments this study collates the results of 86 modelled scenarios of offshore marine releases derived from five different model systems. This synthesis demonstrates a consistent generalised relationship between leak rate, detectability and impact potential of a wide range of hypothetical releases from CO2 storage, which can be described by a power law. For example a leak of the order of 1 T per day should be detectable at, at least, 60 m distance with an environmental impact restricted to less than a 15 m radius of the release point. Small releases are likely to require bottom mounted (lander) monitoring to ensure detection. In summary this work, when coupled with a quantification of leakage risk can deliver a first order environmental impact assessment as an aid to the consenting process. Further this work demonstrates that non-catastrophic release events can be detected at thresholds well below levels which would undermine storage performance or significantly impact the environment, given an appropriate monitoring strategy.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleImpact and detectability of hypothetical CCS offshore seep scenarios as an aid to storage assurance and risk assessmenten_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.rights.holderCopyright 2020 The Authorsen_US
dc.source.journalInternational Journal of Greenhouse Gas Controlen_US
dc.relation.projectNorges forskningsråd: 254711en_US
dc.relation.projectNorges forskningsråd: 305202en_US

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