Fiber-Optic Observations of Internal Waves and Tides
13 pages, 5 figures, supporting information https://doi.org/10.1029/2023JC019980.-- Data Availability Statement: All 4.5 days of DAS data from the Strait of Gibraltar necessary to reproduce Figure 2 and the 3 days of DAS data from Gran Canaria necessary to reproduce Figures 3 and 4 are available through the CaltechDATA repository (Williams et al., 2023). Figures were produced using GMT6 (Wessel et al., 2019)
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American Geophysical Union
2023-09
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13 pages, 5 figures, supporting information https://doi.org/10.1029/2023JC019980.-- Data Availability Statement: All 4.5 days of DAS data from the Strait of Gibraltar necessary to reproduce Figure 2 and the 3 days of DAS data from Gran Canaria necessary to reproduce Figures 3 and 4 are available through the CaltechDATA repository (Williams et al., 2023). Figures were produced using GMT6 (Wessel et al., 2019) |
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Agencia Estatal de Investigación (España) Williams, Ethan F. Ugalde, Arantza Martins, Hugo F. Becerril, Carlos Callies, Jörn Claret, Mariona Fernández-Ruiz, María R. González-Herráez, Miguel Martín-López, Sonia Pelegrí, Josep Lluís Winters, Kraig B. Zhan, Zhongwen |
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artículo |
| author |
Williams, Ethan F. Ugalde, Arantza Martins, Hugo F. Becerril, Carlos Callies, Jörn Claret, Mariona Fernández-Ruiz, María R. González-Herráez, Miguel Martín-López, Sonia Pelegrí, Josep Lluís Winters, Kraig B. Zhan, Zhongwen |
| spellingShingle |
Williams, Ethan F. Ugalde, Arantza Martins, Hugo F. Becerril, Carlos Callies, Jörn Claret, Mariona Fernández-Ruiz, María R. González-Herráez, Miguel Martín-López, Sonia Pelegrí, Josep Lluís Winters, Kraig B. Zhan, Zhongwen Fiber-Optic Observations of Internal Waves and Tides |
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Williams, Ethan F. |
| title |
Fiber-Optic Observations of Internal Waves and Tides |
| title_short |
Fiber-Optic Observations of Internal Waves and Tides |
| title_full |
Fiber-Optic Observations of Internal Waves and Tides |
| title_fullStr |
Fiber-Optic Observations of Internal Waves and Tides |
| title_full_unstemmed |
Fiber-Optic Observations of Internal Waves and Tides |
| title_sort |
fiber-optic observations of internal waves and tides |
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American Geophysical Union |
| publishDate |
2023-09 |
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http://hdl.handle.net/10261/336921 http://dx.doi.org/10.13039/100000006 http://dx.doi.org/10.13039/100000001 http://dx.doi.org/10.13039/100000936 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100011033 |
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| _version_ |
1802820198883917824 |
| spelling |
dig-icm-es-10261-3369212024-05-13T08:40:23Z Fiber-Optic Observations of Internal Waves and Tides Williams, Ethan F. Ugalde, Arantza Martins, Hugo F. Becerril, Carlos Callies, Jörn Claret, Mariona Fernández-Ruiz, María R. González-Herráez, Miguel Martín-López, Sonia Pelegrí, Josep Lluís Winters, Kraig B. Zhan, Zhongwen Agencia Estatal de Investigación (España) European Commission Ministerio de Ciencia, Innovación y Universidades (España) National Science Foundation (US) Office of Naval Research (US) Gordon and Betty Moore Foundation 13 pages, 5 figures, supporting information https://doi.org/10.1029/2023JC019980.-- Data Availability Statement: All 4.5 days of DAS data from the Strait of Gibraltar necessary to reproduce Figure 2 and the 3 days of DAS data from Gran Canaria necessary to reproduce Figures 3 and 4 are available through the CaltechDATA repository (Williams et al., 2023). Figures were produced using GMT6 (Wessel et al., 2019) Although typically used to measure dynamic strain from seismic and acoustic waves, Rayleigh-based distributed acoustic sensing (DAS) is also sensitive to temperature, offering longer range and higher sensitivity to small temperature perturbations than conventional Raman-based distributed temperature sensing. Here, we demonstrate that ocean-bottom DAS can be employed to study internal wave and tide dynamics in the bottom boundary layer, a region of enhanced ocean mixing but scarce observations. First, we show temperature transients up to about 4 K from a power cable in the Strait of Gibraltar south of Spain, associated with passing trains of internal solitary waves in water depth <200 m. Second, we show the propagation of thermal fronts associated with the nonlinear internal tide on the near-critical slope of the island of Gran Canaria, off the coast of West Africa, with perturbations up to about 2 K at 1-km depth and 0.2 K at 2.5-km depth. With spatial averaging, we also recover a signal proportional to the barotropic tidal pressure, including the lunar fortnightly variation. In addition to applications in observational physical oceanography, our results suggest that contemporary chirped-pulse DAS possesses sufficient long-period sensitivity for seafloor geodesy and tsunami monitoring if ocean temperature variations can be separated. Funding for this project was provided through the “Severo Ochoa Centre of Excellence” accreditation (CEX2019-000928-S), the Spanish MCIN/AEI/10.13039/501100011033 and the European Union NextGenerationEU/PRTR Program under projects PSI ref. PLEC2021-007875 and TREMORS ref. CPP2021-008869, the Spanish MCIN/AEI/10.13039/501100011033 and FEDER Program under projects PID2021-128000OB-C21 and PID2021-128000OB-C22, and the European Innovation Council under Grant SAFE: ref. 101098992. E. F. W. was supported by a National Science Foundation Graduate Research Fellowship. M.C. was funded by the European Union (HORIZON-MSCA-2021-PF MOORING, grant agreement no. 101064423). M. R. F.-R. and H. F. M. acknowledge support from the MCIN/AEI/10.13039/501100011033 and European Union NextGenerationEU/PRTR under Grants RYC2021-032167-I and RYC2021-035009-I, respectively. J. C. acknowledges support from the National Science Foundation (Grant OCE-2023161). K. B. W. acknowledges funding provided by the National Science Foundation (Grants OCE-2045399 and OCE-185076) and the U.S. Office of Naval Research (Grant N00014-18-1-2803). Z. Z. acknowledges support from the Moore Foundation and NSF under CAREER Award 1848166 Peer reviewed 2023-10-10T08:48:11Z 2023-10-10T08:48:11Z 2023-09 artículo http://purl.org/coar/resource_type/c_6501 Journal of Geophysical Research - Part C - Oceans 128(9): e2023JC019980 (2023) CEX2019-000928-S http://hdl.handle.net/10261/336921 10.1029/2023JC019980 2169-9291 http://dx.doi.org/10.13039/100000006 http://dx.doi.org/10.13039/100000001 http://dx.doi.org/10.13039/100000936 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100011033 en #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/HE/101064423 Publisher's version https://doi.org/10.1029/2023JC019980 Sí open American Geophysical Union |