Entrainment in bottom gravity currents over complex topography from three-dimensional nonhydrostatic simulations

Tamay M. Özgökmen; Paul F. Fischer; Jinqiao Duan; Traian Iliescu

doi:10.1029/2004GL020186

Entrainment in bottom gravity currents over complex topography from three-dimensional nonhydrostatic simulations

Tamay M. Özgökmen, Paul F. Fischer, Jinqiao Duan, Traian Iliescu

Research output: Contribution to journal › Article › peer-review

Abstract

By recognizing that oceanic overflows follow the seafloor morphology, which shows a self-similar structure at spatial scales ranging from 100 km to 1 m, the impact of topographic bumps on entrainment in gravity currents is investigated using a 3D nonhydrostatic spectral element model. It is found that a bumpy surface can lead to a significant enhancement of entrainment compared to a smooth surface. The change in entrainment is parameterized as a function of statistical estimates of the amplitude and wavenumber parameters of bumps with respect to the background slope.

Original language	English (US)
Pages (from-to)	L13212 1-4
Journal	Geophysical Research Letters
Volume	31
Issue number	13
DOIs	https://doi.org/10.1029/2004GL020186
State	Published - Jul 16 2004
Externally published	Yes

ASJC Scopus subject areas

Geophysics
Earth and Planetary Sciences(all)

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10.1029/2004GL020186

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abstract = "By recognizing that oceanic overflows follow the seafloor morphology, which shows a self-similar structure at spatial scales ranging from 100 km to 1 m, the impact of topographic bumps on entrainment in gravity currents is investigated using a 3D nonhydrostatic spectral element model. It is found that a bumpy surface can lead to a significant enhancement of entrainment compared to a smooth surface. The change in entrainment is parameterized as a function of statistical estimates of the amplitude and wavenumber parameters of bumps with respect to the background slope.",

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AU - Özgökmen, Tamay M.

AU - Fischer, Paul F.

AU - Duan, Jinqiao

AU - Iliescu, Traian

PY - 2004/7/16

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AB - By recognizing that oceanic overflows follow the seafloor morphology, which shows a self-similar structure at spatial scales ranging from 100 km to 1 m, the impact of topographic bumps on entrainment in gravity currents is investigated using a 3D nonhydrostatic spectral element model. It is found that a bumpy surface can lead to a significant enhancement of entrainment compared to a smooth surface. The change in entrainment is parameterized as a function of statistical estimates of the amplitude and wavenumber parameters of bumps with respect to the background slope.

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Entrainment in bottom gravity currents over complex topography from three-dimensional nonhydrostatic simulations

Abstract

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