Influence of benthic boundary layer dynamics on wind-induced currents in the Ebro delta inner shelf
11 pages, 10 figures
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| Format: | artículo biblioteca |
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American Geophysical Union
2002-06
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| Subjects: | Stratification, Wind-induced currents, Inner shelf, Suspended sediment, Ebro delta, Wave-current interaction, |
| Online Access: | http://hdl.handle.net/10261/244480 |
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dig-icm-es-10261-2444802021-06-24T02:19:20Z Influence of benthic boundary layer dynamics on wind-induced currents in the Ebro delta inner shelf Jiménez-Quintana, José Antonio Guillén, Jorge Sánchez-Arcilla, Agustín Gràcia, Vicenç Palanques, Albert Stratification Wind-induced currents Inner shelf Suspended sediment Ebro delta Wave-current interaction 11 pages, 10 figures [1] Measurements taken by two instrumented tripods deployed on the Ebro delta inner shelf at 8.5- and 12.5-m depth were used to characterize low-frequency currents under the action of a moderate eastern storm. Results show that inner shelf currents respond very rapidly to wind action with along-shelf currents dominating over the across-shelf ones. Mean along-shelf velocities of 0.35 and 0.24 m s−1 at the inner and outer position, respectively, were recorded during the event, and they were highly correlated with the along-shelf wind stress. The measured current profiles were used to derive wind drag coefficients, assuming a balance between the along-shelf components of the wind and current bottom stresses. Since under eastern wind events, wave action in the Ebro inner shelf is significantly enhanced, wave-current interaction processes controlling the current bottom stress and sediment mobilization can affect the current structure. During the event, depth-averaged concentrations in the lower meter of the water column larger than 1 g L−1 were recorded that were also accompanied by the generation of vertical concentration gradients larger than 1 g L−1m−1. When the bottom drag coefficient was obtained from velocity profiles without considering the presence of these gradients, the required wind drag coefficients to fulfil the along-shelf balance were much higher than the ones derived from wind data, and they vary across the inner shelf. However, when bottom drag coefficients are obtained including stratification effects, the wind drag coefficients fulfilling the along-shelf balance were of the same order of magnitude as the ones derived from wind data and without any difference at both locations This work was carried out in the framework of the TRASEDVE and FANS projects funded by the CICYT (MAR98-0691-C02-01) and EU (MAS3-CT95-0037), respectively. Additional support was also given by CICYT (MAR96-2268-C03-01-CE) 2021-06-23T10:10:09Z 2021-06-23T10:10:09Z 2002-06 2021-06-23T10:10:09Z artículo http://purl.org/coar/resource_type/c_6501 e-issn: 2169-9291 Journal of Geophysical Research - Part C - Oceans 107(6): 1-11 (2002) http://hdl.handle.net/10261/244480 10.1029/2001JC000905 Publisher's version https://doi.org/10.1029/2001JC000905 Sí open American Geophysical Union |
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Biblioteca del ICM España |
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Stratification Wind-induced currents Inner shelf Suspended sediment Ebro delta Wave-current interaction Stratification Wind-induced currents Inner shelf Suspended sediment Ebro delta Wave-current interaction |
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Stratification Wind-induced currents Inner shelf Suspended sediment Ebro delta Wave-current interaction Stratification Wind-induced currents Inner shelf Suspended sediment Ebro delta Wave-current interaction Jiménez-Quintana, José Antonio Guillén, Jorge Sánchez-Arcilla, Agustín Gràcia, Vicenç Palanques, Albert Influence of benthic boundary layer dynamics on wind-induced currents in the Ebro delta inner shelf |
| description |
11 pages, 10 figures |
| format |
artículo |
| topic_facet |
Stratification Wind-induced currents Inner shelf Suspended sediment Ebro delta Wave-current interaction |
| author |
Jiménez-Quintana, José Antonio Guillén, Jorge Sánchez-Arcilla, Agustín Gràcia, Vicenç Palanques, Albert |
| author_facet |
Jiménez-Quintana, José Antonio Guillén, Jorge Sánchez-Arcilla, Agustín Gràcia, Vicenç Palanques, Albert |
| author_sort |
Jiménez-Quintana, José Antonio |
| title |
Influence of benthic boundary layer dynamics on wind-induced currents in the Ebro delta inner shelf |
| title_short |
Influence of benthic boundary layer dynamics on wind-induced currents in the Ebro delta inner shelf |
| title_full |
Influence of benthic boundary layer dynamics on wind-induced currents in the Ebro delta inner shelf |
| title_fullStr |
Influence of benthic boundary layer dynamics on wind-induced currents in the Ebro delta inner shelf |
| title_full_unstemmed |
Influence of benthic boundary layer dynamics on wind-induced currents in the Ebro delta inner shelf |
| title_sort |
influence of benthic boundary layer dynamics on wind-induced currents in the ebro delta inner shelf |
| publisher |
American Geophysical Union |
| publishDate |
2002-06 |
| url |
http://hdl.handle.net/10261/244480 |
| work_keys_str_mv |
AT jimenezquintanajoseantonio influenceofbenthicboundarylayerdynamicsonwindinducedcurrentsintheebrodeltainnershelf AT guillenjorge influenceofbenthicboundarylayerdynamicsonwindinducedcurrentsintheebrodeltainnershelf AT sanchezarcillaagustin influenceofbenthicboundarylayerdynamicsonwindinducedcurrentsintheebrodeltainnershelf AT graciavicenc influenceofbenthicboundarylayerdynamicsonwindinducedcurrentsintheebrodeltainnershelf AT palanquesalbert influenceofbenthicboundarylayerdynamicsonwindinducedcurrentsintheebrodeltainnershelf |
| _version_ |
1777667470814871552 |