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Hotspots of Current Energy Potential in the Southwestern Tropical Atlantic.

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Title: Hotspots of Current Energy Potential in the Southwestern Tropical Atlantic.
Authors: Lima, Tarsila Sousa1,2,3 (AUTHOR) tarsila.lima@ufpe.br, Queiroz, Syumara1,2,3 (AUTHOR), Américo Ishimaru, Maria Eduarda1,2,3 (AUTHOR), Correia Lima, Eduardo José Araújo1,2 (AUTHOR), Moura, Márcio das Chagas2 (AUTHOR), Araujo, Moacyr1,2,3 (AUTHOR)
Source: Energies (19961073). Jan2026, Vol. 19 Issue 2, p329. 24p.
Subjects: Ocean currents, Power density, Ocean energy resources, Continental shelf, Climate change mitigation
Geographic Terms: North Brazil
Abstract: In the effort to mitigate climate change, the Marine Hydrokinetic (MHK) energy from ocean currents emerges as an important renewable source due to its large potential, although it remains underexploited. In the Southwestern Tropical Atlantic, surface potentials linked to the North Brazil Current (NBC) are known, but the subsurface North Brazil Undercurrent (NBUC) remained unquantified. This study addressed this gap by applying a two-step approach using more than 20 years of high-resolution (1/12°) climatological and daily reanalysis data to estimate current power density (CPD) throughout the water column along the Brazilian shelf (4° N–12° S), with focus on energetic hotspots where maximum CPD exceeds 1000 W m−2. The climatological analysis revealed 12 persistent hotspots (H1–H12). Daily analyses show highly energetic but seasonally variable surface hotspots north of 4° S linked to the NBC (H4–H12; >885 W·m−2) and weaker but more stable subsurface hotspots south of 4° S associated with the NBUC at depths of 130–266 m (H1–H3; 831–808 W·m−2). These patterns are likely influenced by flow–topography interactions along the continental margin. Overall, subsurface resources exhibit greater reliability than surface counterparts, highlighting the importance of incorporating subsurface dynamics in future MHK assessments and development along the Brazilian margin. [ABSTRACT FROM AUTHOR]
Copyright of Energies (19961073) is the property of MDPI 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
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DbLabel: Engineering Source
An: 191171770
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Hotspots of Current Energy Potential in the Southwestern Tropical Atlantic.
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  Data: <searchLink fieldCode="AR" term="%22Lima%2C+Tarsila+Sousa%22">Lima, Tarsila Sousa</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<i> tarsila.lima@ufpe.br</i><br /><searchLink fieldCode="AR" term="%22Queiroz%2C+Syumara%22">Queiroz, Syumara</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Américo+Ishimaru%2C+Maria+Eduarda%22">Américo Ishimaru, Maria Eduarda</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Correia+Lima%2C+Eduardo+José+Araújo%22">Correia Lima, Eduardo José Araújo</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Moura%2C+Márcio+das+Chagas%22">Moura, Márcio das Chagas</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Araujo%2C+Moacyr%22">Araujo, Moacyr</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Jan2026, Vol. 19 Issue 2, p329. 24p.
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  Data: <searchLink fieldCode="DE" term="%22Ocean+currents%22">Ocean currents</searchLink><br /><searchLink fieldCode="DE" term="%22Power+density%22">Power density</searchLink><br /><searchLink fieldCode="DE" term="%22Ocean+energy+resources%22">Ocean energy resources</searchLink><br /><searchLink fieldCode="DE" term="%22Continental+shelf%22">Continental shelf</searchLink><br /><searchLink fieldCode="DE" term="%22Climate+change+mitigation%22">Climate change mitigation</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22North+Brazil%22">North Brazil</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In the effort to mitigate climate change, the Marine Hydrokinetic (MHK) energy from ocean currents emerges as an important renewable source due to its large potential, although it remains underexploited. In the Southwestern Tropical Atlantic, surface potentials linked to the North Brazil Current (NBC) are known, but the subsurface North Brazil Undercurrent (NBUC) remained unquantified. This study addressed this gap by applying a two-step approach using more than 20 years of high-resolution (1/12°) climatological and daily reanalysis data to estimate current power density (CPD) throughout the water column along the Brazilian shelf (4° N–12° S), with focus on energetic hotspots where maximum CPD exceeds 1000 W m−2. The climatological analysis revealed 12 persistent hotspots (H1–H12). Daily analyses show highly energetic but seasonally variable surface hotspots north of 4° S linked to the NBC (H4–H12; >885 W·m−2) and weaker but more stable subsurface hotspots south of 4° S associated with the NBUC at depths of 130–266 m (H1–H3; 831–808 W·m−2). These patterns are likely influenced by flow–topography interactions along the continental margin. Overall, subsurface resources exhibit greater reliability than surface counterparts, highlighting the importance of incorporating subsurface dynamics in future MHK assessments and development along the Brazilian margin. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Energies (19961073) is the property of MDPI 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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        Text: English
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        PageCount: 24
        StartPage: 329
    Subjects:
      – SubjectFull: Ocean currents
        Type: general
      – SubjectFull: Power density
        Type: general
      – SubjectFull: Ocean energy resources
        Type: general
      – SubjectFull: Continental shelf
        Type: general
      – SubjectFull: Climate change mitigation
        Type: general
      – SubjectFull: North Brazil
        Type: general
    Titles:
      – TitleFull: Hotspots of Current Energy Potential in the Southwestern Tropical Atlantic.
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            NameFull: Lima, Tarsila Sousa
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            NameFull: Queiroz, Syumara
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            NameFull: Américo Ishimaru, Maria Eduarda
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            NameFull: Correia Lima, Eduardo José Araújo
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            NameFull: Moura, Márcio das Chagas
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              M: 01
              Text: Jan2026
              Type: published
              Y: 2026
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