Spatiotemporal variability of the coastal circulation in the northern Gulf of Cadiz from Copernicus Sentinel-3A satellite radar altimetry measurements.
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| Title: | Spatiotemporal variability of the coastal circulation in the northern Gulf of Cadiz from Copernicus Sentinel-3A satellite radar altimetry measurements. |
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| Authors: | Mulero-Martinez, R.1 (AUTHOR) roberto.mulero@uca.es, Gómez-Enri, J.1 (AUTHOR) jesus.gomez@uca.es, De Oliveira Júnior, L.2 (AUTHOR) lojunior@ualg.pt, Garel, E.2 (AUTHOR) egarel@ualg.pt, Relvas, P.3 (AUTHOR) prelvas@ualg.pt, Mañanes, R.1 (AUTHOR) rafael.salinas@uca.es |
| Source: | Advances in Space Research. May2024, Vol. 73 Issue 10, p4922-4936. 15p. |
| Subjects: | Radar altimetry, Westerlies, Resource-limited settings, Geostrophic currents, Spring, Generic products |
| Geographic Terms: | Cádiz (Spain) |
| Abstract: | This study presents a generalised characterisation of the surface circulation over the northern shelf of the Gulf of Cadiz, based on 4 years of high-resolution satellite altimetry data from Sentinel-3A and wind model data. The altimetry-based surface zonal currents, adjusted for bottom-drag and wind effects, are compared with a generic CMEMS product and validated against in-situ ADCP measurements. The proposed altimetry product demonstrates superior performance than the CMEMS product, accurately reflecting surface circulation direction compared to in-situ measurements (r = 0.77, RMSE = 0.10 m/s, bias = 0.01 m/s). The use of the bottom-drag and wind-corrected/uncorrected altimetry product for spatiotemporal analysis of the shelf circulation revealed the distinct contributions of wind-driven and geostrophic components in different basin sectors. The results show that over the western basin, positive (eastward) surface currents were predominantly driven by westerly winds, while only occasionally, westward flows coincided with easterly winds, suggesting a higher control of the geostrophic component over the westward flows. In contrast, over the eastern basin, both eastward and westward flows were found to be primarily driven by favourable winds. Additionally, the analysis of Absolute Dynamic Topography (ADT) values along the whole basin showed the presence of ADT gradients both along-shore and cross-shore over the shelf, contributing to geostrophic flows. Finally, the seasonal analysis showed that eastward circulation tends to dominate during the spring and summer months, related to the upwelling season in the Gulf of Cadiz and associated westerly winds. Westward flows prevail during the winter months, related to easterly winds and the rebalancing of the along-shore sea level gradient during relaxed upwelling conditions. The findings demonstrate a significant improvement in the use of satellite altimetry data to study complex oceanographic dynamics in coastal areas, where both spatial and temporal variability are high. Moreover, the similarity of our results to those obtained from in-situ systems supports the use of altimetry data and publicly available wind models to support oceanographic studies in remote or resource-limited areas. [ABSTRACT FROM AUTHOR] |
| Copyright of Advances in Space Research is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 176441825 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Spatiotemporal variability of the coastal circulation in the northern Gulf of Cadiz from Copernicus Sentinel-3A satellite radar altimetry measurements. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Mulero-Martinez%2C+R%2E%22">Mulero-Martinez, R.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> roberto.mulero@uca.es</i><br /><searchLink fieldCode="AR" term="%22Gómez-Enri%2C+J%2E%22">Gómez-Enri, J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> jesus.gomez@uca.es</i><br /><searchLink fieldCode="AR" term="%22De+Oliveira+Júnior%2C+L%2E%22">De Oliveira Júnior, L.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> lojunior@ualg.pt</i><br /><searchLink fieldCode="AR" term="%22Garel%2C+E%2E%22">Garel, E.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> egarel@ualg.pt</i><br /><searchLink fieldCode="AR" term="%22Relvas%2C+P%2E%22">Relvas, P.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> prelvas@ualg.pt</i><br /><searchLink fieldCode="AR" term="%22Mañanes%2C+R%2E%22">Mañanes, R.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> rafael.salinas@uca.es</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Advances+in+Space+Research%22">Advances in Space Research</searchLink>. May2024, Vol. 73 Issue 10, p4922-4936. 15p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Radar+altimetry%22">Radar altimetry</searchLink><br /><searchLink fieldCode="DE" term="%22Westerlies%22">Westerlies</searchLink><br /><searchLink fieldCode="DE" term="%22Resource-limited+settings%22">Resource-limited settings</searchLink><br /><searchLink fieldCode="DE" term="%22Geostrophic+currents%22">Geostrophic currents</searchLink><br /><searchLink fieldCode="DE" term="%22Spring%22">Spring</searchLink><br /><searchLink fieldCode="DE" term="%22Generic+products%22">Generic products</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Cádiz+%28Spain%29%22">Cádiz (Spain)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This study presents a generalised characterisation of the surface circulation over the northern shelf of the Gulf of Cadiz, based on 4 years of high-resolution satellite altimetry data from Sentinel-3A and wind model data. The altimetry-based surface zonal currents, adjusted for bottom-drag and wind effects, are compared with a generic CMEMS product and validated against in-situ ADCP measurements. The proposed altimetry product demonstrates superior performance than the CMEMS product, accurately reflecting surface circulation direction compared to in-situ measurements (r = 0.77, RMSE = 0.10 m/s, bias = 0.01 m/s). The use of the bottom-drag and wind-corrected/uncorrected altimetry product for spatiotemporal analysis of the shelf circulation revealed the distinct contributions of wind-driven and geostrophic components in different basin sectors. The results show that over the western basin, positive (eastward) surface currents were predominantly driven by westerly winds, while only occasionally, westward flows coincided with easterly winds, suggesting a higher control of the geostrophic component over the westward flows. In contrast, over the eastern basin, both eastward and westward flows were found to be primarily driven by favourable winds. Additionally, the analysis of Absolute Dynamic Topography (ADT) values along the whole basin showed the presence of ADT gradients both along-shore and cross-shore over the shelf, contributing to geostrophic flows. Finally, the seasonal analysis showed that eastward circulation tends to dominate during the spring and summer months, related to the upwelling season in the Gulf of Cadiz and associated westerly winds. Westward flows prevail during the winter months, related to easterly winds and the rebalancing of the along-shore sea level gradient during relaxed upwelling conditions. The findings demonstrate a significant improvement in the use of satellite altimetry data to study complex oceanographic dynamics in coastal areas, where both spatial and temporal variability are high. Moreover, the similarity of our results to those obtained from in-situ systems supports the use of altimetry data and publicly available wind models to support oceanographic studies in remote or resource-limited areas. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Advances in Space Research is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.asr.2024.02.054 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 15 StartPage: 4922 Subjects: – SubjectFull: Radar altimetry Type: general – SubjectFull: Westerlies Type: general – SubjectFull: Resource-limited settings Type: general – SubjectFull: Geostrophic currents Type: general – SubjectFull: Spring Type: general – SubjectFull: Generic products Type: general – SubjectFull: Cádiz (Spain) Type: general Titles: – TitleFull: Spatiotemporal variability of the coastal circulation in the northern Gulf of Cadiz from Copernicus Sentinel-3A satellite radar altimetry measurements. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Mulero-Martinez, R. – PersonEntity: Name: NameFull: Gómez-Enri, J. – PersonEntity: Name: NameFull: De Oliveira Júnior, L. – PersonEntity: Name: NameFull: Garel, E. – PersonEntity: Name: NameFull: Relvas, P. – PersonEntity: Name: NameFull: Mañanes, R. IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 05 Text: May2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 02731177 Numbering: – Type: volume Value: 73 – Type: issue Value: 10 Titles: – TitleFull: Advances in Space Research Type: main |
| ResultId | 1 |
