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Nonlinear Limits To Ocean Thermal Structure, N. P. Fofonoff Jan 1998

Nonlinear Limits To Ocean Thermal Structure, N. P. Fofonoff

Journal of Marine Research

The nonlinear volume changes associated with diffusion and mixing of different seawater types produce significant conversions of gravitational potential energy to kinetic energy to maintain and enhance mixing processes and to limit the magnitudes of temperature gradients that can persist in the ocean. Several examples are given to illustrate these critical temperature gradients beyond which conversion exceeds local energy consumption by mixing. The vertical temperature gradients in the Gulf Stream reduce downstream from Cape Hatteras to the critical limit found in the North Atlantic thermocline. The limiting gradients are also seen in surface thermoclines and in "staircase" structures. Although the …

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Linear Ocean Circulation Theory With Realistic Bathymetry, Rick Salmon Jan 1998

Linear Ocean Circulation Theory With Realistic Bathymetry, Rick Salmon

Journal of Marine Research

The linear equations governing stratified, wind-driven flow in an ocean of arbitrary shape may be combined into a single "advection-diffusion" equation for the pressure , in which the "flow" advecting  includes a delta-function contribution at the ocean bottom in the sense of southward "advection" of  along western continental slopes. This interpretation of the -equation helps to explain numerical solutions obtained with a finite-element model incorporating realistic North Atlantic bathymetry.

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Observations Of Temporal Changes Of Tritium-3he Age In The Eastern North Atlantic Thermocline: Evidence For Changes In Ventilation, Paul E. Robbins, William J. Jenkins Jan 1998

Observations Of Temporal Changes Of Tritium-3he Age In The Eastern North Atlantic Thermocline: Evidence For Changes In Ventilation, Paul E. Robbins, William J. Jenkins

Journal of Marine Research

A compilation of fifteen years of tritium and 3He measurements is used to examine the ventilation of the eastern North Atlantic subtropical gyre with specific emphasis on the temporal character of the tracer age field. A multivariate regression analysis in the form of a spatiotemporal Taylor expansion is applied to observations interpolated onto isopycnal surfaces. The time-dependent component of the tracer age field is found to be statistically significant, explaining approximately 10% of the variance of the tracer age observations in the upper thermocline (σ = 26.5) and increasing to roughly 50% of the variance in the lower thermocline …

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Small Viscosity Behavior Of A Homogeneous, Quasi-Geostrophic, Ocean Circulation Mode, Robert B. Scott, David N. Straub Jan 1998

Small Viscosity Behavior Of A Homogeneous, Quasi-Geostrophic, Ocean Circulation Mode, Robert B. Scott, David N. Straub

Journal of Marine Research

Insensitivity to turbulent closure in the wind-driven nonlinear Stommel-Munk model is addressed theoretically and numerically. The QG energy equation is used to show that, with the assumption that the maximum velocities occur at inertial length scales or smaller, a Sverdrup interior is consistent with the small Rossby number assumption only when the frictional parameters exceed critical values. For frictional parameters smaller than these values, valid solutions must decrease the energy source. This is possible for non-Sverdrup solutions since the energy source is dependent on the solution. The steady-state behavior of the model was investigated via a pseudo-arclength continuation algorithm. Dependence …

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United States Department Of Housing And Urban Development Consolidated Report, United States: Department Of Housing And Urban Development (Hud) Jan 1998

United States Department Of Housing And Urban Development Consolidated Report, United States: Department Of Housing And Urban Development (Hud)

Documents

No abstract provided.

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The Longterm Neuropsychological Effects Of Single-Suture Craniosynostosis On Child Development, Sheela Natesh Magge Jan 1998

The Longterm Neuropsychological Effects Of Single-Suture Craniosynostosis On Child Development, Sheela Natesh Magge

Yale Medicine Thesis Digital Library

No abstract provided.

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Urinary Catecholamines And Cortisol In Attention Deficity/Hyperactivity Disorder, Marcia Dover Jan 1998

Urinary Catecholamines And Cortisol In Attention Deficity/Hyperactivity Disorder, Marcia Dover

Yale Medicine Thesis Digital Library

No abstract provided.

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A Critical Analysis Of The Spectral Filtered, Signal-Averaged Electrocardiogram, Naomi Freya Botkin Jan 1998

A Critical Analysis Of The Spectral Filtered, Signal-Averaged Electrocardiogram, Naomi Freya Botkin

Yale Medicine Thesis Digital Library

No abstract provided.

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An Analysis Of Issues Surrounding Disclosure Of The Diagnosis Of Human Immunodeficiency Virus Infection To Children, Reshma Ravi Chugani Jan 1998

An Analysis Of Issues Surrounding Disclosure Of The Diagnosis Of Human Immunodeficiency Virus Infection To Children, Reshma Ravi Chugani

Yale Medicine Thesis Digital Library

No abstract provided.

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Bedside Doppler Identification Of Lower-Extremity Deep-Vein Thrombosis, Gregory Stephen Raskin Jan 1998

Bedside Doppler Identification Of Lower-Extremity Deep-Vein Thrombosis, Gregory Stephen Raskin

Yale Medicine Thesis Digital Library

No abstract provided.

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Postnatal Development Of Olfactory Receptor Cell Axonal Arbors, Jason R. Klenoff Jan 1998

Postnatal Development Of Olfactory Receptor Cell Axonal Arbors, Jason R. Klenoff

Yale Medicine Thesis Digital Library

No abstract provided.

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Neurochemical And Behavioral Tolerance To Cocaine Following Treatment With Cocaine Analogs, Tobias Tong-Po Lee Jan 1998

Neurochemical And Behavioral Tolerance To Cocaine Following Treatment With Cocaine Analogs, Tobias Tong-Po Lee

Yale Medicine Thesis Digital Library

No abstract provided.

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Modulation Of Atp-Sensitive Potassium Channel Activity By Atp-Binding Cassette Transporters : A Model For Channel Regulation, Tong-Yi Yao Jan 1998

Modulation Of Atp-Sensitive Potassium Channel Activity By Atp-Binding Cassette Transporters : A Model For Channel Regulation, Tong-Yi Yao

Yale Medicine Thesis Digital Library

No abstract provided.

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Inequality In The Distribution Of Personal Income In The World: How It Is Changing And Why, T. Paul Schultz Jan 1998

Inequality In The Distribution Of Personal Income In The World: How It Is Changing And Why, T. Paul Schultz

Discussion Papers

No abstract provided.

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Simulation Of Primary Production And Export Fluxes In The Northwestern Mediterranean Sea, Marina Lévy, Laurent Mémery, Jean-Michel André Jan 1998

Simulation Of Primary Production And Export Fluxes In The Northwestern Mediterranean Sea, Marina Lévy, Laurent Mémery, Jean-Michel André

Journal of Marine Research

A biogeochemical model, BIOMELL (BIOgeochemical Model of the Euphotic Layer of Lodyc), has been developed to simulate the temporal evolution of the main nitrogen stocks and fluxes at the DyFAMed station (Dynamique des Flux Atmospheriques en Mediterranée), located in the Northwestern Mediterranean Sea. This mainly oligotrophic region is characterized by a strong seasonal cycle, and a significant export of dissolved organic matter compared to the particulate export measured by sediment traps. Validation of the model is made using temperature, nitrate and chlorophyll profiles acquired at DyFAMed approximately every month in 1991. Extended datasets from specific years are also used to …

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On The Parameterization Of Eddy Transfer, Part Ii: Tests With A Channel Model, Peter D. Killworth Jan 1998

On The Parameterization Of Eddy Transfer, Part Ii: Tests With A Channel Model, Peter D. Killworth

Journal of Marine Research

In Part I of this paper (Killworth, 1997), a new eddy parameterization scheme was presented. Here, the scheme is tested by comparing its predictions with those of multi-year averages from an eddy-resolving channel model. Its accuracy is similar to that of a tuned version of previous schemes. However, a tuned version of the new parameterization can reproduce both the long-term average of the eddy-resolving solution as well as the initial slumping of a narrow front. Both tuned schemes reproduced the bolus transport well. The new parameterization reproduces the observed feature that the diffusivity is maximal at mid-depth and minimal at …

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The Prime Eddy, Adrian P. Martin, Ian P. Wade, Kelvin J. Richards, Karen J. Heywood Jan 1998

The Prime Eddy, Adrian P. Martin, Ian P. Wade, Kelvin J. Richards, Karen J. Heywood

Journal of Marine Research

An intrathermocline lens with strong anticyclonic circulation and cold surface temperature anomaly (–1°C) is reported in the Iceland Basin at 59.1N 20W. The lens is 1000 m thick, 120 km wide and centered on the 27.45 σ0 isopycnal at 700 m. Its influence, through distortion of density surfaces, is felt throughout the 2800 m water column. At the surface this leads to a shallower mixed layer within the eddy which will have an impact on the local planktonic ecology. At a depth of 700 m and a radius of 40 km the eddy circulation has an azimuthal velocity of …

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Influences Of Physical Oceanographic Processes On Chlorophyll Distributions In Coastal And Estuarine Waters Of The South Atlantic Bight, P. G. Verity, J. O. Blanton, J. Amft, C. Barans, D. Knott, B. Stender, E. Wenner Jan 1998

Influences Of Physical Oceanographic Processes On Chlorophyll Distributions In Coastal And Estuarine Waters Of The South Atlantic Bight, P. G. Verity, J. O. Blanton, J. Amft, C. Barans, D. Knott, B. Stender, E. Wenner

Journal of Marine Research

Coastal and estuarine waters of the South Atlantic Bight are highly productive, with primary production of 600-700 gC/m2/y. While controls and fate of this production are conceptually well understood, the importance of meteorology and physical circulation processes on phytoplankton has not received equivalent attention. Here, we describe the effects of wind stress and tidal currents on temporal and spatial distributions of phytoplankton biomass represented as chlorophyll a (chl a). Moored instruments were deployed and shipboard sampling was conducted in the North Edisto estuary (South Carolina) and adjacent inner shelf waters during four, two-week field studies in May …

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On The Barotropic Ocean With Bottom Friction, Victor Barcilon Jan 1998

On The Barotropic Ocean With Bottom Friction, Victor Barcilon

Journal of Marine Research

The mathematical problem governing the circulation of a barotropic ocean with bottom friction is re-examined by a procedure which allows us to systematically span the entire region of the parameter space R, ε << 1, where R and ε are the Rossby and 'friction' numbers. The procedure consists in first identifying three dynamically distinct sectors in parameter space. Next, single variable asymptotic expansions are carried out along the boundaries of these sectors. In addition to affording us the opportunity to study the regimes in both of the adjoining sectors, this procedure avoids the possibility of the series becoming disordered. The sector R …

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Generalized Inverse With Shipboard Current Measurements: Tidal And Nontidal Flows In Long Island Sound, Philip S. Bogden, James O'Donnell Jan 1998

Generalized Inverse With Shipboard Current Measurements: Tidal And Nontidal Flows In Long Island Sound, Philip S. Bogden, James O'Donnell

Journal of Marine Research

A simple linear shallow-water model forced by tidal boundary conditions can capture most of the tide height variability in Long Island Sound. In this sense, the tides are easy to model. The modeled tidal currents can be subtracted from measurements in order to obtain estimates of subtidal circulation. But linear shallow-water dynamics is not accurate enough for this purpose. Allowing for dynamical errors with a generalized inverse model leads to improved estimates of tidal and nontidal flow. The analysis provides expected errors for the prior (before inversion) and posterior (after inversion) tidal velocity field. Estimates of the flow field in …

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Seasonal Patterns Of Carbonate Diagenesis In Nearshore Terrigenous Muds: Relation To Spring Phytoplankton Bloom And Temperature, Mark A. Green, Robert C. Aller Jan 1998

Seasonal Patterns Of Carbonate Diagenesis In Nearshore Terrigenous Muds: Relation To Spring Phytoplankton Bloom And Temperature, Mark A. Green, Robert C. Aller

Journal of Marine Research

Pore water saturation state with respect to calcite and aragonite minerals in Long Island Sound sediments fluctuates from saturated and near saturated conditions during late fall, to undersaturated during winter, before slowly changing to supersaturated conditions during late spring. Undersaturation occurs during cold, winter periods when lower rates of ΣCO2 production (low rates of heterotrophic metabolism) and oxidation of reduced minerals such as FeS lower calcium carbonate saturation states. Direct evidence that dissolution of both calcites and aragonite are occurring during this season comes from the simultaneous increases in excess pore water carbonate dissolution products Ca2+, F …

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Intermediate Water Circulation And Ventilation Of The Indian Ocean Derived From Water-Mass Contributions, Yuzhu You Jan 1998

Intermediate Water Circulation And Ventilation Of The Indian Ocean Derived From Water-Mass Contributions, Yuzhu You

Journal of Marine Research

The intermediate water circulation and ventilation of the Indian Ocean is somewhat unique among the world oceans (in terms of the source waters). This has been studied with historical and recently obtained hydrographic data including potential temperature, salinity, dissolved oxygen, phosphate and silicate in a mixing model of applying optimum multiparameter analysis (OMP). The mixing model comprises three source water masses, Antarctic Intermediate Water (AAIW) (applied the transformed AAIW north of the Antarctic frontal zone and central South Indian Ocean), Indonesian Intermediate Water (IIW) and Red Sea Intermediate Water (RSIW) (including the influence of Persian Gulf Intermediate Water). A possible …

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Comparative Diagenesis At Three Sites On The Canadian Continental Margin, Bernard P. Boudreau, Alfonso Mucci, Bjorn Sundby, George W. Lunther, Norman Silverberg Jan 1998

Comparative Diagenesis At Three Sites On The Canadian Continental Margin, Bernard P. Boudreau, Alfonso Mucci, Bjorn Sundby, George W. Lunther, Norman Silverberg

Journal of Marine Research

Diagenesis of carbon, oxygen, nitrogen, and manganese at three sites on the Canadian continental margin is quantitatively compared and contrasted using results from a computer code (CANDI) published by Boudreau (1996a). The data at Station 3 (Cabot Strait) are well explained by the steady state output from CANDI, assuming a porewater balance created by diffusion and reaction only, whereas the data from Stations 4 (Emerald Basin-Scotia Shelf) and 5 (Scotia Slope) are not consistent, in one way or another, with this simple model. The deviations between model and data at Station 4 are best explained by nonsteady-state diagenesis. Model fits …

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Anterior Glenohumeral Dislocations In The Emergency Department ; Do Prereduction Radiographic Findings Influence Patient Management?, Kevin P. Daly Jan 1998

Anterior Glenohumeral Dislocations In The Emergency Department ; Do Prereduction Radiographic Findings Influence Patient Management?, Kevin P. Daly

Yale Medicine Thesis Digital Library

No abstract provided.

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A Five Year Retrospective Study Of Tuberculosis At A Public Hospital In The Ecuadorian Highlands, Eric Gary Shmookler Jan 1998

A Five Year Retrospective Study Of Tuberculosis At A Public Hospital In The Ecuadorian Highlands, Eric Gary Shmookler

Yale Medicine Thesis Digital Library

No abstract provided.

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Oecd Economic Surveys: Korea 1998, Organisation For Economic Co-Operation And Development (Oecd) Jan 1998

Oecd Economic Surveys: Korea 1998, Organisation For Economic Co-Operation And Development (Oecd)

Documents

No abstract provided.

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Annual Report 1998, Czech National Bank Jan 1998

Annual Report 1998, Czech National Bank

Documents

No abstract provided.

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Oecd Economic Surveys 1997-1998, Organisation For Economic Co-Operation And Development (Oecd) Jan 1998

Oecd Economic Surveys 1997-1998, Organisation For Economic Co-Operation And Development (Oecd)

Documents

Special Features: Health Care Reformincludes: Recent Trends and Short-Term prospects, Economic Policies , Implementing structural reform: a review of progress, and the reform of the Mexican health care system.

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Failure And Failure Resolution In The Us Thrift And Banking Industries, Atul Gupta, Lalatendu Misra Jan 1998

Failure And Failure Resolution In The Us Thrift And Banking Industries, Atul Gupta, Lalatendu Misra

Documents

No abstract provided.

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Bank Of Finland 79th Year Book Report On Activities In 1998, Suomen Pankki/Central Bank Of Finland Jan 1998

Bank Of Finland 79th Year Book Report On Activities In 1998, Suomen Pankki/Central Bank Of Finland

Documents

No abstract provided.

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