{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,10]],"date-time":"2026-02-10T16:54:15Z","timestamp":1770742455989,"version":"3.49.0"},"reference-count":82,"publisher":"Oxford University Press (OUP)","issue":"1","license":[{"start":{"date-parts":[[2023,5,20]],"date-time":"2023-05-20T00:00:00Z","timestamp":1684540800000},"content-version":"vor","delay-in-days":1,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,5,27]]},"abstract":"<jats:title>SUMMARY<\/jats:title>\n               <jats:p>We report on the analysis of M2 ocean tide loading (OTL) kinematic GPS vertical displacement and tidal gravity measurements using 26 GPS and four gravimetric sites across the Canary Islands archipelago. In this region, the standard deviation among recent ocean tide models is lower than 0.4\u00a0cm in amplitude and 0.3\u00b0 in phase, which are suitably accurate for displacement modelling. However, for gravity we need to model regional ocean tides to achieve enough accuracy in the loading calculations. Particularly, this study improves the predicted OTL gravity variations when global ocean models are replaced with the regional model CIAM2 which assimilates local tide gauge data. These small ocean tide model errors allow us to use the differences between observed and predicted OTL values to study the elastic and anelastic properties of the solid Earth around the Canary Islands. In the prediction of OTL, we first used the recent elastic STW105 and S362ANI seismic models, obtaining average observed minus predicted residuals of 1.2\u20131.3\u00a0mm for vertical displacement and 3 nm s\u22122 for gravity. After the STW105 and S362ANI models were adjusted for anelasticity, by considering a constant quality factor Q at periods ranging from 1\u00a0s to 12.42 hr, the average misfit between observations and predicted OTL values reduced to 0.7\u20130.8\u00a0mm for vertical displacement and to 1 nm s\u22122 for gravity. However, the average vertical displacement misfit is made up from site misfits less than 0.5\u00a0mm in western islands but for the easternmost islands of Lanzarote and Fuerteventura, they still reach up to nearly 2\u00a0mm at some sites, which still exceeds the uncertainty in the GPS observations. It is hypothesized that mantle upwelling underneath the Canary Islands, creating spatial variations in the elastic properties, causes the large residuals observed in the eastern islands. We reduced the shear modulus by up to 35 per cent in the upper mantle layer of 24.4\u2013220\u00a0km depth. This produced residual observed minus model differences of about 0.7\u00a0mm for the sites on Lanzarote and Fuerteventura, comparable to the results obtained for the GPS sites across the rest of the archipelago, whose residuals in turn were also slightly reduced through the VS velocity and shear modulus reductions (by 0.2\u00a0mm on average).<\/jats:p>","DOI":"10.1093\/gji\/ggad205","type":"journal-article","created":{"date-parts":[[2023,5,20]],"date-time":"2023-05-20T11:27:37Z","timestamp":1684582057000},"page":"273-286","source":"Crossref","is-referenced-by-count":4,"title":["Anelastic response of the Earth's crust underneath the Canary Islands revealed from ocean tide loading observations"],"prefix":"10.1093","volume":"235","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9593-3249","authenticated-orcid":false,"given":"Jose","family":"Arnoso","sequence":"first","affiliation":[{"name":"Instituto de Geociencias (IGEO) , CSIC-UCM. Doctor Severo Ochoa, 7. 28040 Madrid , Spain"},{"name":"Grupo de Investigaci\u00f3n Geodesia, Universidad Complutense de Madrid , 28040 Madrid , Spain"}]},{"given":"Machiel S","family":"Bos","sequence":"additional","affiliation":[{"name":"Departamento de Inform\u00e1tica, Universidade da Beira Interior, Covilh\u00e3, Portugal , Rua Marqu\u00eas d'\u00c1vila e Bolama 6201-001 , Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4119-5583","authenticated-orcid":false,"given":"Maite","family":"Benavent","sequence":"additional","affiliation":[{"name":"Facultad de Matem\u00e1ticas, Universidad Complutense de Madrid , 28040 Madrid , Spain"},{"name":"Grupo de Investigaci\u00f3n Geodesia, Universidad Complutense de Madrid , 28040 Madrid , Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6719-1978","authenticated-orcid":false,"given":"Nigel T","family":"Penna","sequence":"additional","affiliation":[{"name":"School of Engineering, Newcastle University , NE1 7RU Newcastle upon Tyne , UK"}]},{"given":"Sergio","family":"Sainz-Maza","sequence":"additional","affiliation":[{"name":"Instituto Geogr\u00e1fico Nacional , Observatorio Geof\u00edsico Central. 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