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However, until now, such CO<jats:sub>2<\/jats:sub> enhancement has not been verified by measuring CO<jats:sub>2<\/jats:sub> degassing during a subaerial eruption. Here, we provide evidence of highly CO<jats:sub>2<\/jats:sub>-rich gas emissions during the 86-day 2021 Tajogaite eruption of Cumbre Vieja volcano on La Palma Island, in the Canary archipelago. Our results reveal sustained high plume CO<jats:sub>2<\/jats:sub>\/SO<jats:sub>2<\/jats:sub> ratios, which, when combined with SO<jats:sub>2<\/jats:sub> fluxes, melt inclusion volatile contents and magma production rates at explosive and effusive vents, imply a magmatic CO<jats:sub>2<\/jats:sub> content of 4.5\u2009\u00b1\u20091.5\u2009wt%. The amount of CO<jats:sub>2<\/jats:sub> released during the 2021 eruptive activity was 28\u2009\u00b1\u200914 Mt CO<jats:sub>2<\/jats:sub>. Extrapolating to the volume of alkaline mafic magmas forming La Palma alone (estimated as 4000\u2009km<jats:sup>3<\/jats:sup> erupted over 11\u2009Ma), we infer a maximum CO<jats:sub>2<\/jats:sub> emission into the ocean and atmosphere of 10<jats:sup>16<\/jats:sup> moles of CO<jats:sub>2<\/jats:sub>, equivalent to 20% of the eruptive CO<jats:sub>2<\/jats:sub> emissions from a large igneous province eruption, suggesting that the formation of the Canary volcanic archipelago produced a CO<jats:sub>2<\/jats:sub> emission of similar magnitude as a large igneous province.<\/jats:p>","DOI":"10.1038\/s43247-023-01103-x","type":"journal-article","created":{"date-parts":[[2023,12,12]],"date-time":"2023-12-12T08:03:12Z","timestamp":1702368192000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":31,"title":["Exceptional eruptive CO2 emissions from intra-plate alkaline magmatism in the Canary volcanic archipelago"],"prefix":"10.1038","volume":"4","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3779-4812","authenticated-orcid":false,"given":"Mike","family":"Burton","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0254-6539","authenticated-orcid":false,"given":"Alessandro","family":"Aiuppa","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7836-3117","authenticated-orcid":false,"given":"Patrick","family":"Allard","sequence":"additional","affiliation":[]},{"given":"Mar\u00eda","family":"Asensio-Ramos","sequence":"additional","affiliation":[]},{"given":"Ana Pardo","family":"Cofrades","sequence":"additional","affiliation":[]},{"given":"Alessandro","family":"La Spina","sequence":"additional","affiliation":[]},{"given":"Emma J.","family":"Nicholson","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6990-7610","authenticated-orcid":false,"given":"Vittorio","family":"Zanon","sequence":"additional","affiliation":[]},{"given":"Jos\u00e9","family":"Barrancos","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0460-9772","authenticated-orcid":false,"given":"Marcello","family":"Bitetto","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2698-8622","authenticated-orcid":false,"given":"Margaret","family":"Hartley","sequence":"additional","affiliation":[]},{"given":"Jorge E.","family":"Romero","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5612-8316","authenticated-orcid":false,"given":"Emma","family":"Waters","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4710-1963","authenticated-orcid":false,"given":"Alex","family":"Stewart","sequence":"additional","affiliation":[]},{"given":"Pedro A.","family":"Hern\u00e1ndez","sequence":"additional","affiliation":[]},{"given":"Jo\u00e3o Pedro","family":"Lages","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3907-5766","authenticated-orcid":false,"given":"Eleazar","family":"Padr\u00f3n","sequence":"additional","affiliation":[]},{"given":"Kieran","family":"Wood","sequence":"additional","affiliation":[]},{"given":"Benjamin","family":"Esse","sequence":"additional","affiliation":[]},{"given":"Catherine","family":"Hayer","sequence":"additional","affiliation":[]},{"given":"Klaudia","family":"Cyrzan","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9704-5819","authenticated-orcid":false,"given":"Estelle F.","family":"Rose-Koga","sequence":"additional","affiliation":[]},{"given":"Federica","family":"Schiavi","sequence":"additional","affiliation":[]},{"given":"Luca","family":"D\u2019Auria","sequence":"additional","affiliation":[]},{"given":"Nemesio M.","family":"P\u00e9rez","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2023,12,12]]},"reference":[{"key":"1103_CR1","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1016\/S0012-821X(03)00124-9","volume":"210","author":"RSJ Sparks","year":"2003","unstructured":"Sparks, R. 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