High-resolution surveys of internal tidal waves in Monterey Bay, California, using an autonomous underwater vehicle
Bellingham, James G.
Stanton, Timothy P.
MetadataShow full item record
Temperature measured at the Monterey Inner Shelf Observatory (MISO) in southern Monterey Bay reveals frequent solitons and semidiurnal internal tidal bores (ITBs). A field study was undertaken to determine whether these features originate offshore and propagate shoreward over the continental shelf, and to characterize their evolution as they propagate. We developed a new survey method of using an autonomous underwater vehicle (AUV) to tightly track the thermocline along a 4.5 km transect, repeated 18 times over 18 hours, thereby measuring the internal-wave induced isotherm displacement at very high resolution. AUV measurements were compared with measurements at MISO, which is closer to shore. Internal waves of various scales were captured. An ITB of amplitude greater than 20 m propagating shoreward from the outer bay was the dominant feature. Rapid changes in stratification, possibly due to horizontal advection, were also observed. Technical challenges, advantages, and future improvements of this new AUV survey method are discussed. This study demonstrates that AUVs are efficient tools for surveying internal tidal waves.
The article of record as published may be located at http://dx.doi.org/10.4319/lom.2011.9.571
Showing items related by title, author, creator and subject.
Dennis, John F. (Naval Postgraduate School, 1979);The recent emphasis in all levels of government on accountability of resources has resulted in an increase in concern for internal control. Included in internal control systems is internal auditing. Self-review at a ...
Ong, Ming Yi (Monterey, California: Naval Postgraduate School, 2016-09);Sound waves propagating through the oceans are refracted by internal waves. In the shallow waters of the continental shelves, an additional downward refraction of sound waves due to internal waves can cause them to interact ...
Horizontal anisotropy and seasonal variation of acoustic fluctuations observed during the 2010–2011 Philippine Sea experiment Marwoto, Bambang (Monterey, California: Naval Postgraduate School, 2015-12);The anisotropic ocean environment will lead to variability of ocean acoustic travel time. The variability of travel times comes from several ocean dynamical processes, including eddies, internal tides, and stochastic ...