Download or read book Stratified Coastal Trapped Waves and Mean Flows written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coastal waves and wave-generated mean flows are studied in a stratified, rotating model ocean. Waves trapped to the coast are generated by time-dependent flow over a sloping and irregular bottom. Short term goals of this study include quantifying the evolution of the vertical structure of the along-slope mean flow driven by non-linear interactions of the coastal trapped wave and damped by friction. In particular, the effects of stratification on the cross-slope overturning circulation will be examined.

Download or read book Coastal trapped and Frontal trapped Waves in a Continuously Stratified Western Boundary Current written by Mark E. Luther and published by . This book was released on 1980 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book On Coastal Trapped Waves at Low Latitudes in a Stratified Ocean written by Richard Dennis Romea and published by . This book was released on 1982 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: The response on the continental shelf of a baroclinic ocean to driving by an alongshore coastal wind stress and by barotropic and baroclinic wind forced interior motions is studied as a function of latitude. The relative excitation of continental shelf waves and internal Kelvin waves is studied. The response of a rotating stratified ocean with a vertical boundary, forced at the surface by an alongshore coastal wind stress, shows vertically propagating subinertial motions. Several examples which illustrate the basic properties of the response are presented. Changes in amplitude and frequency with depth are predicted. Components that decay with depth from the surface and components that represent coastal internal Kelvin waves with negative vertical group velocity and upward phase propagation are forced. The effect of bottom Ekman layer friction and slope topography on free internal Kelvin waves is examined, using both a steep and weak slope model. The steep slope represents the low latitude case while the weak slope represents the mid-latitude case. There are substantial differences between the results from the two models. Free waves are frictionally damped and offshore and vertical phase shifts are induced by friction, as well as an onshore flow. Topography induces changes to the wave frequency and alongshore phase speed. The modal amplitude is altered and an onshore flow is induced. Sea level and current velocity data from the equator to 17°S on the west coast of South America show that low frequency (0.1-0.2 cpd) fluctuations propagate poleward with phase speeds similar to those predicted for first mode baroclinic Kelvin waves. The sea level and currents are coherent and approximately 1800 out of phase. The waves do not appear to be the result of local atmospheric forcing. Empirical orthogonal functions show that the alongshore and vertical structure of alongshore velocity is consistent with first mode internal Kelvin waves.

Download or read book Coastal Trapped and Frontal Trapped Waves in a Continuously Stratified Western Boundary Current A Contribution to the Gulf Stream Meanders Experiment written by Mark E. Luther and published by . This book was released on 1980 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of a realistic western boundary current on the alongshore propagation of sub-initial waves trapped by a sloping bottom topography are studied using a numerical model incorporating realistic bottom topography and a current field which is in thermal wind balance with the density field. This models the Gulf Stream as it flows along the continental slope off North Carolina. The mean state velocity and density fields do not vary alongshore and are continuous in the horizontal as well as the vertical. The linearized, inviscid equations of motion for small amplitude disturbances yield a single governing equation for the perturbation pressure. This equation is solved using a marching method for elliptical problems. The dispersion relations are obtained by searching for the resonance response of the system to an arbitrary uniform forcing term. Four discrete stable modes of Rossby-like waves are identified, all propagating in the upstream direction. A mode-coupling resonance is found between the first two modes. For small wavenumber, the first mode is trapped within the frontal zone on the cyclonic side of the mean current with a smaller barotropic component over the shelf. This 'frontal trapping' is due to the quasi-geostrophic potential vorticity gradient in the mean current. For larger wavenumber, the first mode becomes primarily a barotropic shelf wave. The second mode is a purely barotropic shelf wave for small wavenumbers, but becomes a frontal-trapped wave at large wavenumbers. For the higher wave modes, most of the energy is trapped near the surface in the frontal zone. (Author).

Download or read book Elements of Physical Oceanography written by and published by Academic Press. This book was released on 2009-08-26 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt: Elements of Physical Oceanography is a derivative of the Encyclopedia of Ocean Sciences, Second Edition and serves as an important reference on current physical oceanography knowledge and expertise in one convenient and accessible source. Its selection of articles—all written by experts in their field—focuses on ocean physics, air-sea transfers, waves, mixing, ice, and the processes of transfer of properties such as heat, salinity, momentum and dissolved gases, within and into the ocean. Elements of Physical Oceanography serves as an ideal reference for topical research. References related articles in physical oceanography to facilitate further research Richly illustrated with figures and tables that aid in understanding key concepts Includes an introductory overview and then explores each topic in detail, making it useful to experts and graduate-level researchers Topical arrangement makes it the perfect desk reference

Download or read book Subinertial Coastal trapped Waves in Channels with Variable Stratification and Topography microform written by Koutitonsky, Vladimir Gregory and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 1985 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coastally trapped Waves in a Stratified Ocean written by Daniel Gordon Wright and published by . This book was released on 1990 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effects of Stratification and Alongshore Currents on the Propagation of Coastal trapped Waves written by David M. Holland and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scattering of Coastal trapped Waves by Irregularities in Coastline and Topography written by John Lewis Wilkin and published by . This book was released on 1988 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study is conducted of the scattering of freely-propagating subinertial frequency coastal-trapped waves (CTWS) by large variations in coastline and topography using analytical and numerical techniques. Particular attention is paid to the role of stratification because, as shown, the introduction of even modest stratification can eliminate backscattered free-waves with large wavenumbers which occur, theoretically, in a barotropic ocean. An analytical solution is presented for the scattering of barotropic waves incident upon a discontinuity in shelf width. Discussion of solutions relying on backscattered free-waves is avoided by considering only the range of parameters over which energy transmission is nearly 100%. The solution shows there is a substantial transfer of energy to modes other than that of the incident wave. The transmitted mode most readily excited is that which has the across-shelf structure most closely coinciding with that of the incident wave. For a widening shelf, energy is therefore readily transferred to higher modes. The resultant presence of multiple modes produces a strong modulation in flow intensity and phase progression downstream of the scattering region which may affect the interpretation of shelf wave observations. A non-dispersive shelf wave 'pulse' of limited a10ngshelf extent scatters into a train of similarly shaped waves of all allowable modes, each propagating at its own free-wave speed. To overcome limitations of the analytical study a numerical model which accomodates arbitrary density stratification, bathymetry, and coastline, is employed. Numerical simulations are conducted of the scattering of CTWs by a set of topographic and coastline variations which are representative of many continental shelves. The strength of the scattering observed is found to be proportional to a topographic warp factor which estimates the severity of the topographic irregularities. The scattering is amplified by density stratification. A comparison of the effects of widening and narrowing topographies shows that the gross scattering effects of 'reciprocal' topographies are qnite similar. Within the scattering region itself, the strengths of the scattered-wave-induced currents exhibit substantial variation over short spatial scales. On both widening and narrowiag shelves, there is generally a marked intensification of the flow within the scattering region, and significant differences in the directions of the currents at points separated by a few tens of kilometers indicate the occurence of rapid variations ia phase. On narrowing shelves, the influence of the scattering can extend upstream into the region of uniform topography even when no freely-propagating backscattered waves exist. A simulation is condncted of CTW scattering at a site on the East Coast of Australia where observations suggest the presence of scattered freely-propagating CTWs. The success of the model simulation in reproducing features of observations confirms that realistic shelf geometries can scatter significant levels of CTW energy, and that the scattered waves can have an appreciable signal in current-meter observations made on the continental shelf. This demonstrates that along irregular coastlines it is necessary to account for the possibility that CTW scattering processes filay be in effect if oceanographic observations are to be interpreted correctly.

Download or read book Physical Oceanography of Continental Shelves written by K.H. Brink and published by Princeton University Press. This book was released on 2023-09-12 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book is intended as a graduate-level textbook and professional reference on the physical oceanography of the continental shelf and slope. Defined as water deeper than about three meters and shallower than a kilometer, this region of the ocean is important for a variety of scientific and practical reasons, from its high biological productivity and role in distributing outflows from the continents to its heavy usage in transportation and recreation. In recent years, research on the coastal ocean has expanded as the study of both short- and long-term anthropogenic change has become increasingly urgent. Yet there is no comprehensive treatment of the dynamics of this critical region. The book covers a range of topics involving currents and water properties, including turbulent boundary layers, wind driving, tides, buoyancy currents, waves, instabilities, and connections with the open, deep ocean. Brink's approach-informed by over a decade teaching the corresponding course in Woods Hole/MIT's joint program-centers on the dynamics of particular processes and combinations of processes, but also includes copious observational examples. Intended to be accessible to graduate students in a range of oceanographic specialties, the book assumes 2-3 years of university-level math and at least an introductory course in quantitative physical oceanography"--

Download or read book Physics and Biogeochemistry of the East Asian Marginal Seas written by SungHyun Nam and published by Frontiers Media SA. This book was released on 2022-11-08 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modeling Marine Systems written by A. M. Davies and published by CRC Press. This book was released on 2018-01-18 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: This two-volume reference presents a series of review and research articles on advances in computing, marine physics, and remote sensing and addresses their importance to shallow sea modeling. Intended as a tribute to Dr. Norman Heaps, topics in the book reflect the range and diversity of his work, as well as his influence on international marine science. Topics discussed include numerical techniques, flow in homogenous sea regions, stratified flows, lake regimes, validation of numerical models, remote sensing as a method to collect oceanographic data at the sea surface, and bottom boundary modeling. Marine scientists actively involved in mathematical modeling and scientists who are interested in using models as tools to gain more insight and understanding of the processes they are observing will find this text useful.

Download or read book Baroclinic Processes on Continental Shelves written by Christopher N. K. Mooers and published by American Geophysical Union. This book was released on 1986 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Coastal and Estuarine Sciences, Volume 3. The AGU Monograph Series on Coastal and Estuarine Regimes provides timely summaries and reviews of major process and regional studies, both observational and theoretical, and of theoretical and numerical models. It grew out of an IAPSO/SCOR/ECOR working group initiative several years ago intended to enhance scientific communications on this topic. The series' authors and editors are drawn from the international community. The ultimate goal is to stimulate bringing the theory, observations, and modeling of coastal and estuarine regimes together on the global scale.

Download or read book Poleward Flows Along Eastern Ocean Boundaries written by Steven J. Neshyba and published by Springer Science & Business Media. This book was released on 2013-03-07 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper differences and anomalies in west coast seasonal flow structures have been highlighted. In particular, it was emphasized that flow off Washington has significant differences from that of Oregon; namely, during summer, flow at mid-shelf is more poleward off Washington, and during winter, flow on the inner-shelf is more equatorward off Washington than off Oregon. The former result may be related to the poleward decrease in the longshelf wind stress; the latter result may be related to the presence of the Columbia River plume. Off southern California the near-surface flow over the shelf is more persistently equatorward than that off Washington . Conversely, the flow over the slope in the upper 100 m of the water column is more persistently poleward than that off washington. Also, the undercurrent structure, that is, a subsurface maximum, is maintained at least from summer to early winter off southern California (no data are yet available from spring), but only during summer and early fall off washington. We note that the seasonal cycle of vertical shear in the two locations is similar, although a reversal in sign sometimes occurs off Washington. ACKNOWLEDGEMZNTS This work was supported by the Department of Energy under Grant DE-FG05-85ER60333t4 and by the National Science Foundation under Grant OCE 86-01058#1. 175 From: Adriana Huyer, College of Oceanography, Oregon State University, Corvallis, OR. On: Review and Commentary to paper POLEWARD FLOW NEAR TRE NORTRERH AND SOU'l'BERH BOONDARIES OF TRE U. S. WEST COAST, by Barbara Hickey.

Download or read book Resonant Forcing of Coastally Trapped Waves in a Continuously Stratified Ocean written by Humio Mitsudera and published by . This book was released on 1989 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Data Assimilation for Atmospheric Oceanic and Hydrologic Applications Vol II written by Seon Ki Park and published by Springer Science & Business Media. This book was released on 2013-05-22 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the most recent progress in data assimilation in meteorology, oceanography and hydrology including land surface. It spans both theoretical and applicative aspects with various methodologies such as variational, Kalman filter, ensemble, Monte Carlo and artificial intelligence methods. Besides data assimilation, other important topics are also covered including targeting observation, sensitivity analysis, and parameter estimation. The book will be useful to individual researchers as well as graduate students for a reference in the field of data assimilation.

Download or read book Journal of Physical Oceanography written by and published by . This book was released on 2000 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt: