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Anomalous Structures In Oceanic Turbulence
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Book Synopsis Anomalous Structures in Oceanic Turbulence by : Mykhailo Rudko
Download or read book Anomalous Structures in Oceanic Turbulence written by Mykhailo Rudko and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, anomalous structures of oceanic mesoscale turbulence, as exemplified by coherent vortices and zonally-elongated transient flows (ZELTs), are considered. All simulations of mesoscale turbulence flows are performed in a two-layer, quasi-geostrophic model. The first chapter explores stability of and transport by baroclinic vortices on the [beta]-plane. The study adapts a wave-mean flow formalism and examines interactions between the axisymmetric flow ("the vortex") and residuals ("the waves"). Unlike baroclinically unstable vortices on the f-plane, such vortices on the [beta]-plane can be also vulnerable to barotropic instability as revealed by the globally integrated energy balance analysis. The spatial structure of energy fluxes shows the energy leakage inside the vortex core when its breakdown occurs. Mixing by stable and unstable vortical flows is quantified through the computation of Finite-Time Lyapunov Exponent (FTLE) maps. Depending on the strength of wave radiation, the upper-layer FTLE maps of stable vortices show either an annulus or volute ring of vigorous mixing inside the vortex interior. This ring region is disrupted when the vortex becomes unstable. Both stable and unstable vortices show the wavy patterns of FTLE in the near- and far-fields. Despite the fact that the initial vortex resides in the top layer only, significant FTLE patterns are observed in the deep layer at later times. Lagrangian analysis of the vortex-induced change of large-scale tracer gradient demon- strates significant effects of vortex instability in the top layer and the importance of the wave-like anomalies in the bottom layer. The second chapter explores the phenomenology of zonally-elongated transients (ZELTs) in the ocean and the sensitivity of their properties to changes in several environmental factors. ZELTs explain a major part of anisotropy in mesoscale turbulent flow. Calculations are performed in a two-layer, quasi-geostrophic model. Empirical Orthogonal Functions (EOF) decomposition allows for the separation of ZELTs from the background turbulent flow as several leading EOF modes. The leading Extended EOF reveals that ZELTs propagate westward at the speed of ~ 1 cms-1. The decrease in the planetary vorticity gradient and increase in the bottom drag coefficient each leads to flattening of the variance spectrum, isotropization of the leading EOF and fast decay of the autocorrelation function of its corresponding Principal Component. The third chapter deals with the underpinning mechanisms of ZELTs formation. As evidenced by spatial Fourier spectrum, spatial structure of the leading EOF and the autocorrelation function of its corresponding Principal Component, simulations in reduced-dynamics models with completely removed eddy-eddy interactions show no presence of ZELTs, thereby suggesting that the physical mechanism based on energy cascade arguments is more plausible for the formation of ZELTs. The energy exchanges produced by baroclinic-baroclinic and mixed-mode interactions are the major cause of the emergence of ZELTs as revealed in simulations with both moderate and high values of bottom drag. Barotropic-barotropic interactions, which entail energy cascade in barotropic mode, play a secondary role in ZELTs development in the moderate-drag simulation, and these interactions have no impact on the dynamics of ZELTs in the high-drag simulation.
Download or read book Marine Research written by and published by . This book was released on 1969 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Marine Conservation Ecology by : John Roff
Download or read book Marine Conservation Ecology written by John Roff and published by Routledge. This book was released on 2013-09-05 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: This major textbook provides a broad coverage of the ecological foundations of marine conservation, including the rationale, importance and practicalities of various approaches to marine conservation and management. The scope of the book encompasses an understanding of the elements of marine biodiversity - from global to local levels - threats to marine biodiversity, and the structure and function of marine environments as related to conservation issues. The authors describe the potential approaches, initiatives and various options for conservation, from the genetic to the species, community and ecosystem levels in marine environments. They explore methods for identifying the units of conservation, and the development of defensible frameworks for marine conservation. They describe planning of ecologically integrated conservation strategies, including decision-making on size, boundaries, numbers and connectivity of protected area networks. The book also addresses relationships between fisheries and biodiversity, novel methods for conservation planning in the coastal zone and the evaluation of conservation initiatives.
Book Synopsis Collected Reprints by : Southwest Fisheries Center (U.S.)
Download or read book Collected Reprints written by Southwest Fisheries Center (U.S.) and published by . This book was released on 1986 with total page 904 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Marine Turbulence by : Helmut Z. Baumert
Download or read book Marine Turbulence written by Helmut Z. Baumert and published by Cambridge University Press. This book was released on 2005-04-04 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a comprehensive overview of marine turbulence and mixing for students, scientists, engineers.
Book Synopsis Dynamic Processes in the Chemistry of the Upper Ocean by : J.D. Burton
Download or read book Dynamic Processes in the Chemistry of the Upper Ocean written by J.D. Burton and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt: The. Advanced Research Inst i tute (ARI) on Dynamic Processes in the Chemistry of the Upper OCean had its origins in discussions by the NATO Special Programme Panel on Marine Sciences during 1978 when a wide range of topics for future ARIs was being considered. What was then envisaged was a workshop on chemical aspects of the oceanic mixed layer, at which consider ation would be given to the inputs, cycling and removal of material, and the problems involved in the quantitative assessment of fluxes. It was realised that any attempt to model chemical processes would need the active collaboration of workers from other fields, especially physical oceano graphers concerned with air-sea interaction and turbulence, and biological oceano~raphers with expertise in primary productivity and the cycling of particulate and dissolved organic material. As plans for the ARI developed further a somewhat different emphasis emerged, focused on the question as to how chemists should set about observing an environment as variable and dynamic as the upper ocean and selecting the appropriate scales for the framework of measurements to study a particular process, especially in the light of current knowledge of physical processes of transport and mixing. It was plain that the capabil ity of physical oceanographic methods to resolve differences on small spatial and temporal scales is considerably ahead of the capabilities of biologists and chemists who rely upon discrete sampling and complex lab oratory manipulations in order to obtain most of their data.
Download or read book Collected Reprints written by and published by . This book was released on 1986 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Atmosphere-ocean Interaction by : Eric Bradshaw Kraus
Download or read book Atmosphere-ocean Interaction written by Eric Bradshaw Kraus and published by Oxford University Press, USA. This book was released on 1994 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: "On balance, this book is excellent and deserves to be in the personal collection of active scientists." --Bulletin of the American Meteorological Society
Book Synopsis The Near-Surface Layer of the Ocean by : Fedororv
Download or read book The Near-Surface Layer of the Ocean written by Fedororv and published by CRC Press. This book was released on 2013-12-19 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book treats the structure and variability of basic physical fields in a thin near-surface layer which responds quickly to all short-term and local fluctuations of atmospheric forcing and of radiative solar energy flux. The book contains up-to-date information on different phenomena and processes in this layer based on research conducted over t
Author :National Council on Marine Resources and Engineering Development (U.S.) Publisher : ISBN 13 : Total Pages :788 pages Book Rating :4.3/5 (91 download)
Book Synopsis Marine Research by : National Council on Marine Resources and Engineering Development (U.S.)
Download or read book Marine Research written by National Council on Marine Resources and Engineering Development (U.S.) and published by . This book was released on 1969 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 1070 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Satellite Altimetry Over Oceans and Land Surfaces by : Detlef Stammer
Download or read book Satellite Altimetry Over Oceans and Land Surfaces written by Detlef Stammer and published by CRC Press. This book was released on 2017-10-31 with total page 617 pages. Available in PDF, EPUB and Kindle. Book excerpt: Satellite remote sensing, in particular by radar altimetry, is a crucial technique for observations of the ocean surface and of many aspects of land surfaces, and of paramount importance for climate and environmental studies. This book provides a state-of-the-art overview of the satellite altimetry techniques and related missions, and reviews the most-up-to date applications to ocean dynamics and sea level. It also discusses related space-based observations of the ocean surface and of the marine geoid, as well as applications of satellite altimetry to the cryosphere and land surface waters; operational oceanography and its applications to navigation, fishing and defense.
Book Synopsis Structure of the Marine Surface Layer by : Kurt Frederick Schmitt
Download or read book Structure of the Marine Surface Layer written by Kurt Frederick Schmitt and published by . This book was released on 1978 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Catalogue of Accessioned Publications by : World Data Center A--Oceanography
Download or read book Catalogue of Accessioned Publications written by World Data Center A--Oceanography and published by . This book was released on with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Marine Research, 1973 by : United States. National Oceanic and Atmospheric Administration
Download or read book Marine Research, 1973 written by United States. National Oceanic and Atmospheric Administration and published by . This book was released on 1973 with total page 1200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Passive Microwave Remote Sensing of Oceans by : Victor Raizer
Download or read book Advances in Passive Microwave Remote Sensing of Oceans written by Victor Raizer and published by CRC Press. This book was released on 2024-09-05 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition introduces the fundamentals of passive microwave remote sensing of oceans, including the physical principles of microwave radiometry, novel observational data, their interpretation, and applications. It not only demonstrates and examines the recent advantages and state of the art of microwave data but also provides guidance for explaining complex ocean studies and advanced applications. All chapters are thoroughly updated with detailed analysis of space‐based microwave missions, and a new chapter on space‐based microwave radiometer experiments has been added. This book discusses the power of microwave remote sensing as an efficient tool for diagnostics of ocean phenomena in research and education. Features New to this Edition: • Includes a new chapter and additional data, images, illustrations, and references. • Uses ocean microwave data, acquired from different platforms, to illustrate different methods of analysis and interpretation. • Updates information on recent and important satellite missions dedicated to microwave remote sensing of oceans. • Offers more detailed analysis of multiband microwave data and images. • Provides examples of microwave data that cover different ocean environmental phenomena and hydro‐physical fields, including global and local ocean features. • Presents additional material on advanced applications, including detection capabilities. This book is intended for postgraduate students and professionals working in fields related to remote sensing, geography, oceanography, civil, environmental, and geotechnical engineering.
