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Título: | Turbulence and high-frequency variability in a deep gravity current outflow |
Autor: | Nash, Jonathan D.; Peters, Hartmut; Kelly, Samuel M.; Pelegrí, Josep Lluís CSIC ORCID ; Emelianov, Mikhail CSIC ORCID ; Gasser, Marc CSIC | Palabras clave: | Internal waves Gravity currents Deep outflows Turbulence |
Fecha de publicación: | sep-2012 | Editor: | American Geophysical Union | Citación: | Geophysical Research Letters 39(18): L18611 (2012) | Resumen: | Intensive sampling of the deep Mediterranean outflow 70 km W of the Strait of Gibraltar reveals a strong, tidally modulated gravity current embedded with large-amplitude oscillations and energetic turbulence. The flow appears to be hydraulically controlled at a small topographic constriction, with turbulence and internal waves varying together and increasing dramatically downstream of the choke point. These data suggest that a significant fraction of energy dissipation, mixing, and entrainment stress in gravity currents may occur in localized regions controlled by time-varying flow interactions with fine-scale topography. These findings highlight the important role of processes that are not resolved by global climate models (GCMs), which do not contain tides or mixing due to fine-scale topographic interactions. © 2012. American Geophysical Union. All Rights Reserved | Descripción: | 6 pages, 4 figures | Versión del editor: | https://doi.org/10.1029/2012GL052899 | URI: | http://hdl.handle.net/10261/92102 | DOI: | 10.1029/2012GL052899 | Identificadores: | doi: 10.1029/2012GL052899 issn: 0094-8276 e-issn: 1944-8007 |
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