Search Results - "Duda, Timothy F"

Diurnal and semidiurnal internal tide energy flux at a continental slope in the South China Sea by Duda, Timothy F., Rainville, Luc

“…Barotropic (surface) and baroclinic (internal) tides were measured at four mooring sites during a field investigation of acoustic propagation characteristics…”
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IMPACTS OF OCEAN WARMING ON ACOUSTIC PROPAGATION OVER CONTINENTAL SHELF AND SLOPE REGIONS by Lynch, James F., Gawarkiewicz, Glen G., Lin, Ying-Tsong, Duda, Timothy F., Newhall, Arthur E.

“…Gradients of heat and salt affect the propagation of sound energy in the ocean. Anticipated changes in oceanic conditions will alter thermohaline conditions…”
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Multipurpose Acoustic Networks in the Integrated Arctic Ocean Observing System by Mikhalevsky, Peter N., Sagen, Hanne, Worcester, Peter F., Baggeroer, Arthur B., Orcutt, John, Moore, Sue E., Lee, Craig M., Vigness-Raposa, Kathleen J., Freitag, Lee, Arrott, Matthew, Atakan, Kuvvet, Beszczynska-Möller, Agnieszka, Duda, Timothy F., Dushaw, Brian D., Gascard, Jean Claude, Gavrilov, Alexander N., Keers, Henk, Morozov, Andrey K., Munk, Walter H., Rixen, Michel, Sandven, Stein, Skarsoulis, Emmanuel, Stafford, Kathleen M., Vernon, Frank, Yuen, Mo Yan

“…The dramatic reduction of sea ice in the Arctic Ocean will increase human activities in the coming years. This activity will be driven by increased demand for…”
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Acoustic signal and noise changes in the Beaufort Sea Pacific Water duct under anticipated future acidification of Arctic Ocean waters by Duda, Timothy F.

“…It is predicted that Arctic Ocean acidity will increase during the next century as a result of carbon dioxide accumulation in the atmosphere and migration into…”
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Effects of Pacific Summer Water layer variations and ice cover on Beaufort Sea underwater sound ducting by Duda, Timothy F, Zhang, Weifeng Gordon, Lin, Ying-Tsong

“…A one-year fixed-path observation of seasonally varying subsurface ducted sound propagation in the Beaufort Sea is presented. The ducted and…”
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A coupled mode model for omnidirectional three-dimensional underwater sound propagation by DeCourcy, Brendan J., Duda, Timothy F.

“…A fully three-dimensional (3D) omnidirectional numerical coupled mode model of acoustic propagation is detailed. A combination of normal mode and finite…”
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Suppressing breakers with polar oil films: Using an epic sea rescue to model wave energy budgets by Cox, Charles S., Zhang, Xin, Duda, Timothy F.

“…Oil has been used to still stormy seas for centuries, but the mechanisms are poorly understood. Here we examine the processes by using quantitative information…”
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Mixing in a coastal environment: 1. A view from dye dispersion by Ledwell, James R., Duda, Timothy F., Sundermeyer, Miles A., Seim, Harvey E.

“…Dye release experiments were performed together with microstructure profiling to compare the two methods of estimating diapycnal diffusivity during summer and…”
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A three-dimensional parabolic equation model of sound propagation using higher-order operator splitting and Padé approximants by Lin, Ying-Tsong, Collis, Jon M, Duda, Timothy F

“…An alternating direction implicit (ADI) three-dimensional fluid parabolic equation solution method with enhanced accuracy is presented. The method uses a…”
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Multiscale multiphysics data-informed modeling for three-dimensional ocean acoustic simulation and prediction by Duda, Timothy F., Lin, Ying-Tsong, Newhall, Arthur E., Helfrich, Karl R., Lynch, James F., Zhang, Weifeng Gordon, Lermusiaux, Pierre F. J., Wilkin, John

“…Three-dimensional (3D) underwater sound field computations have been used for a few decades to understand sound propagation effects above sloped seabeds and in…”
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Observations of the space/time scales of Beaufort sea acoustic duct variability and their impact on transmission loss via the mode interaction parameter by Kucukosmanoglu, Murat, Colosi, John A., Worcester, Peter F., Dzieciuch, Matthew A., Sagen, Hanne, Duda, Timothy F., Zhang, Weifeng Gordon, Miller, Christopher W., Richards, Edward L.

“…The Beaufort duct (BD) is a subsurface sound channel in the western Arctic Ocean formed by cold Pacific Winter Water (PWW) sandwiched between warmer Pacific…”
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A higher-order split-step Fourier parabolic-equation sound propagation solution scheme by LIN, Ying-Tsong, DUDA, Timothy F

“…A three-dimensional Cartesian parabolic-equation model with a higher-order approximation to the square-root Helmholtz operator is presented for simulating…”
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Statistics of low-frequency normal-mode amplitudes in an ocean with random sound-speed perturbations: shallow-water environments by Colosi, John A, Duda, Timothy F, Morozov, Andrey K

“…Second- and fourth-moment mode-amplitude statistics for low-frequency ocean sound propagation through random sound-speed perturbations in a shallow-water…”
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Horizontal coherence of low-frequency fixed-path sound in a continental shelf region with internal-wave activity by Duda, Timothy F, Collis, Jon M, Lin, Ying-Tsong, Newhall, Arthur E, Lynch, James F, DeFerrari, Harry A

“…Sound at 85 to 450 Hz propagating in approximately 80-m depth water from fixed sources to a joint horizontal/vertical line array (HLA/VLA) is analyzed. The…”
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Are Any Coastal Internal Tides Predictable? by NASH, JONATHAN D., SHROYER, EMILY L., KELLY, SAMUEL M., INALL, MARK E., DUDA, TIMOTHY F., LEVINE, MURRAY D., JONES, NICOLE L., MUSGRAVE, RUTH C.

“…Surface tides are the heartbeat of the ocean. Because they are controlled by Earth's motion relative to other astronomical objects in our solar system, surface…”
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Validation of genetic algorithm-based optimal sampling for ocean data assimilation by Heaney, Kevin D., Lermusiaux, Pierre F. J., Duda, Timothy F., Haley, Patrick J.

“…Regional ocean models are capable of forecasting conditions for usefully long intervals of time (days) provided that initial and ongoing conditions can be…”
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Acoustic Ducting, Reflection, Refraction, and Dispersion by Curved Nonlinear Internal Waves in Shallow Water by Lynch, J.F., Ying-Tsong Lin, Duda, T.F., Newhall, A.E.

“…Nonlinear internal waves in shallow water have been shown to be effective ducts of acoustic energy, through theory, numerical modeling, and experiment. To…”
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Observations of sound-speed fluctuations on the New Jersey continental shelf in the summer of 2006 by Colosi, John A, Duda, Timothy F, Lin, Ying-Tsong, Lynch, James F, Newhall, Arthur E, Cornuelle, Bruce D

“…Environmental sensors moored on the New Jersey continental shelf tracked constant density surfaces (isopycnals) for 35 days in the summer of 2006. Sound-speed…”
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Systematic microstructure variability in double-diffusively stable coastal waters of nonuniform density gradient by Duda, Timothy F., Rehmann, Chris R.

“…Conductivity microstructure, water velocity, and stratification were measured during a tow‐yo transect near the New England shelf/slope front in early August…”
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Internal solitons in the northeastern south China Sea. Part I: sources and deep water propagation by Ramp, S.R., Tswen Yung Tang, Duda, T.F., Lynch, J.F., Liu, A.K., Ching-Sang Chiu, Bahr, F.L., Hyoung-Rok Kim, Yang, Y.-J.

“…A moored array of current, temperature, conductivity, and pressure sensors was deployed across the Chinese continental shelf and slope in support of the Asian…”
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