Spice, internal waves, and sound speed in the upper ocean

2004 ◽  
Vol 116 (4) ◽  
pp. 2634-2634 ◽  
Author(s):  
Daniel L. Rudnick
Keyword(s):  
Internal Waves ◽  
Sound Speed ◽  
Upper Ocean

scholarly journals Spatially Broad Observations of Internal Waves in the Upper Ocean at the Hawaiian Ridge

2006 ◽  
Vol 36 (6) ◽  
pp. 1085-1103 ◽  
Author(s):  
Joseph P. Martin ◽  
Daniel L. Rudnick ◽  
Robert Pinkel
Keyword(s):  
Numerical Model ◽  
Energy Density ◽  
Potential Energy ◽  
Internal Waves ◽  
Upper Ocean ◽  
Mean Square ◽  
The South ◽  
South Side ◽  
Topographic Slope ◽  
Hawaiian Ridge

Abstract The density and current structure at the Hawaiian Ridge was observed using SeaSoar and Doppler sonar during a survey extending from Oahu to Brooks Banks. Across- and along-ridge changes in internal wave statistics in the upper ocean within 200 km of the ridge are investigated. Internal waves with trough-to-crest amplitude as large as 60 m and horizontal wavelength of about 50 km are observed repeatedly in across-ridge sections of potential density. Within 150 km of the ridge, kinetic and potential energy density exceed open-ocean values with maxima about 10 times Garrett–Munk levels. In the Kauai Channel (KC), the kinetic energy density is largest along an M2 internal tide ray. The ray originates at the northern edge of the ridge peak at a large across-ridge change in topographic slope and terminates at the ocean surface about 30–40 km south of the ridge peak. Kinetic and potential energy density are larger on the south side of the ridge at KC, the side with larger topographic slope. Energy density is also larger on the south side of the ridge at KC in numerical model results and on the side of steeper topographic slope in analytical model results. Along the ridge, the largest observed values of mean-square shear and mean-square slope of isopycnal depth are collocated with the largest energy density in numerical model results. Mean-square shear and mean-square slope increase with decreasing bottom depth and with increasing M2 barotropic tidal forcing.

Internal waves in JASIN

1983 ◽  
Vol 308 (1503) ◽  
pp. 389-405 ◽  
Keyword(s):  
Internal Waves ◽  
Internal Tide ◽  
Deep Ocean ◽  
Upper Ocean ◽  
Velocity Measurements ◽  
High Frequencies ◽  
Topographic Features ◽  
Rockall Trough ◽  
Moored Current Meters ◽  
The Continuum

The internal wavefield during the Joint Air—Sea Interaction (JASIN) experiment was monitored by moored current meters and moored and towed thermistor chains. The observations were concentrated in the upper ocean near the centre of Rockall Trough, but velocity measurements were also made near topographic features and throughout the water column. Observed spectra are compared with results from the deep ocean, as represented by the Garrett-Munk (GM) model of the spectral continuum, and are generally found to have spectral levels equal to or greater than the GM spectrum. The greatest deviation from the GM spectrum occurs at high frequencies and wavenumbers where the observed spectra often exhibit a spectral shoulder and high vertical coherence. These features, also found in other upper-ocean spectra, are explained by a model composed of three vertically standing modes. The spatial variation of internal wave variance is related to topography: variance is highest near rough topography. The ratio of variance in the semidiurnal tidal band to variance in a band in the continuum is approximately constant. The possibility of a dynamical link between the two frequency bands requires further investigation. The semidiurnal internal tide varies temporally and spatially. Rockall Bank is identified as the source of an energetic beam of tidal oscillations during a one-week period.

Space‐time scales of sound‐speed perturbations observed in the Philippine Sea: Contributions from internal waves and tides, eddies, and spicy thermohaline structure.

2010 ◽  
Vol 128 (4) ◽  
pp. 2386-2386
Author(s):  
John A. Colosi ◽  
Brian Dushaw ◽  
Rex K. Andrew ◽  
Lora J. Van Effelen ◽  
Matthew A. Dzieciuch ◽  
...  
Keyword(s):  
Time Scales ◽  
Internal Waves ◽  
Sound Speed ◽  
Space Time ◽  
Thermohaline Structure ◽  
Philippine Sea ◽  
Waves And Tides

Observations of Philippine Sea sound-speed perturbations, and the contributions from internal waves and tides, and spicy thermohaline structure

2011 ◽  
Vol 130 (4) ◽  
pp. 2556-2556
Author(s):  
John Colosi ◽  
Brian Dushaw ◽  
Lora Van Uffelen ◽  
Matt Dzieciuch ◽  
Bruce Cornuelle ◽  
...  
Keyword(s):  
Internal Waves ◽  
Sound Speed ◽  
Thermohaline Structure ◽  
Philippine Sea ◽  
Waves And Tides
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