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Project 20 Low-Frequency Active Sonar: The Successful Union of Oceanographic and Systems R&D Disciplines at the NATO Undersea Research Centre and Elsewhere
Oceanographic and Systems Elsewherev
2015/7/20
This paper documents and illustrates how the original SACLANTCEN/NURC (Supreme Allied Command Atlantic Undersea Research Centre/NATO Undersea Research Centre) project initially known as the Active Adj...
Dynamics of barotropic low-frequency fluctuations in San Francisco Bay during upwelling
Hydrodynamic modeling Low-frequency fluctuations San Francisco Bay
2015/6/30
Observations of wind, surface elevations, and currents in San Francisco Bay during the 1999 upwelling season are analyzed to understand the dynamics of low-frequency currents in upwelling-dominated es...
Scientists Identify Source of Mysterious Low-Frequency Sound Heard for Decades in the Southern Ocean
Scientists Identify Source Mysterious Low-Frequency Sound Heard for Decades Southern Ocean
2014/5/13
Scientists have conclusive evidence that the source of a unique rhythmic sound, recorded for decades in the Southern Ocean and called the “bio-duck,” is the Antarctic minke whale (Balaenoptera bonaere...
The response of giant kelp (Macrocystis pyrifera) in southern California to low-frequency climate forcing
giant kelp southern California
2014/4/17
The nutrient climate on the inner shelf off southern California changed markedly across the 1976–1977 North
Pacific climate regime shift. With respect to giant kelp (Macrocystis pyrifera) canopies of...
Ocean Acidification and the Increasing Transparency of the Ocean to Low-Frequency Sound
Ocean acid boric acid to dissolve carbonate ions sound waves Marine mammals
2015/7/6
As the ocean becomes more acidic, low-frequency (~ 1–3 kHz and below) sound travels much farther due to changes in the amounts of pH-dependent species such as dissolved borate and carbonate ions, whic...
Continental Shelf Waves：Low-Frequency Variations in Sea Level and Currents Over the Oregon Continental Shelf
Continental Shelf Waves Sea Level Low-Frequency Variations Oregon Continental Shelf
2009/4/2
Sea level variations and currents on the Oregon continental shelf exhibit wavelike characteristics in a frequency band from approximately 0.15 to 0.45 cycle per day (cpd). Shelf wave dispersion curves...
Observed Anisotropy of Spectral Characteristics of Internal Waves Induced by Low-Frequency Currents
Spectral Characteristics Internal Waves Low-Frequency Currents
2009/3/26
The isotropy of the internal wave field is investigated from short-time spectra of horizontal current measured in the deep sea. A significant anisotropy is detected at high frequencies during most per...
Some Three-Dimensional Characteristics of Low-Frequency Current Fluctuations near the Oregon Coast
Three-Dimensional Characteristics Oregon Coast Low-Frequency Current Fluctuations
2009/3/7
An analysis is presented of the low-frequency fluctuations [ω<0.6 cycle per day (cpd)] of the currents near the Oregon coast, based on the 1972 and 1973 measurements from moored current meters in CUE-...
A Study of Low-Frequency Fluctuations Near the Peru Coast
Low-Frequency Fluctuations Peru Coast
2009/2/23
An analysis is presented of low-frequency (<0.4 cpd) fluctuations in currents, temperature and tide gage data collected during the March-September 1976 segment of the CUEA JOINT-II experiment off the ...
The Relationship of Tidal and Low-Frequency Currents on the North Slope of Georges Bank
Tidal Low-Frequency Currents North Slope of Georges Bank
2009/2/18
Measured currents at the steeply sloping north edge of Georges Bank show an unusually strong correlation between tidal and lower frequency components. The dominant current constituents are the rotary ...
The Nature of the Poleward Heat Flux Due to Low-Frequency Current Fluctuations in Drake Passage
Poleward Heat Flux Drake Passage Low-Frequency Current Fluctuations
2009/2/16
Values of poleward heat flux due to low-frequency current fluctuations in Drake Passage are presented for 19 long-term current meter records obtained during 1975, 1976 and 1977. Most of the measuremen...
Low-Frequency Current Variability on the Southern Mid-Atlantic Bight
Low-Frequency Current Southern Mid-Atlantic Bight
2009/2/13
Low-frequency current variability on the continental shelf, 84 km off the mouth of the Chesapeake Bay, was examined from 4-month (mid-March to June 1975) current, sea level and meteorological records....
Observations of Interaction between the Internal Wavefield and Low-Frequency Flows in the North Atlantic
Interaction Low-Frequency Flows Internal Wavefield North Atlantic
2009/2/13
A total of four moorings from POLYMODE array I and II were analyzed in an investigation of the interaction of wavefields and mean flow. In particular, evidence for internal wave-mean flow interaction ...
Low-frequency v and u component oscillations in the eastern equatorial Atlantic are addressed using lime series of up to 1.5 years duration from the lower portion of the main thermocline. A distinct f...
Low-Frequency Variations in Currents near the Shelf Break：Northeast Gulf of Alaska
Very low-frequency Low-Frequency Variations Shelf Break
2009/2/9
We present current observations from depths of 20, 50, 100 and 175 m obtained over a 3-year period near the northeast Gulf of Alaska shelf break, and emphasize a 2-year continuous segment from 50 m de...