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The Mythical Thermohaline Oscillator?, Barry Ruddick, Lingqi Zhang

Journal of Marine Research

The system discussed by Stommel (1987) and Welander (1982), in which heating and evaporation at the surface of the ocean are balanced by vertical turbulent mixing, is studied analytically and numerically for mixing laws appropriate to salt fingers, rather than mechanical turbulence. Stommel and Welander found for mechanically-driven turbulent mixing that a limit cycle of T and S exists (that is, T and S oscillate) in the presence of steady forcing. We find that the usual salt finger parameterizations, in which salinity flux coefficient and buoyancy flux ratio decrease with increasing density ratio, do not allow a limit cycle. This …

Lead-210 And Polonium-210 In Pteropod And Heteropod Mollusc Shells From The North Pacific: Evaluation Of Sample Treatments And Variation With Shell Size, Victoria J. Fabry, Margaret L. Delaney

Journal of Marine Research

Lead-210 activities in carefully cleaned size groups of pteropod and heteropod shells from the eastern equatorial Pacific were typically 0.3 dpm/g shell, similar to those reported in other biogenic calcium carbonates. However, ²¹⁰Po activities were in excess of levels expected from the decay of shell-incorporated ²¹⁰Pb, with (²¹⁰Po/²¹⁰Pb) activity ratios ranging from 20 to 28 in size-fractionated samples. Sample treatment procedures were examined using pteropod shells collected from diverse locations of the North Pacific. Possible sources of ²¹⁰Po in excess of ²¹⁰Pb in shells include inclusion of ²¹⁰Po in the organic …

Retroviral Antibodies In Wild-Caught New World Primates, Lisa Suzanne Ragen

Yale Medicine Thesis Digital Library

No abstract provided.

Mechanisms Of Subsurface Thermal Structure And Sea Surface Thermohaline Variabilities In The Southwestern Tropical Pacific During 1975-85, Thierry Delcroix, Christian Hénin

Journal of Marine Research

Major features of the southwestern tropical Pacific (SWTP), defined between 160E–140W and 24S–10S, are brought to light through analysis of surface water samples (23000) and temperature/depth observations (8500), both collected by ship of opportunity programs during the 1979–85 period. The mean vertical thermal structure (and its related parameters), mean sea surface temperature (SST) and salinity (SSS) are first portrayed, to further quantify the 1979–85 variability. It is demonstrated that the observed seasonal and interannual variabilities, the latter being associated with the strong 1982–83 EI Niño Southern Oscillation (ENSO) event, are mostly governed by specific mechanisms involving varying wind field and …

Issues In Public And Private Ownership Of Forested Lands In Northern New England And New York, Clark S. Binkley, Ed, Perry R. Hagenstein

Yale School of the Environment Bulletin Series

No abstract provided.

Repeated Trade And The Velocity Of Money, Pradeep Dubey, Siddhartha Sahi, Martin Shubik

Cowles Foundation Discussion Papers

There are two sources of inefficiency of strategic equilibria (SE) in market mechanisms. The first is the oligopolistic effect, which occurs when an agent can single-handedly influence prices. With a continuum of agents we get “perfect competition” and this effect is, of course, wiped out. But the inefficiency of SE’s may nevertheless persist because agents are not “perfectly liquid,” i.e., the constraints of the mechanism are such that they cannot carry out arbitrary trades at the market prices. Our main result is that, if enough repeated rounds of trade are permitted within a single utility period, then the liquidity problem …

The Durbin-Watson Ratio Under Infinite Variance Errors, Peter C.B. Phillips, Mico Loretan

Cowles Foundation Discussion Papers

This paper studies the properties of the von Neumann ratio for time series with infinite variance. The asymptotic theory is developed using recent results on the weak convergence of partial sums of time series with infinite variance to stable processes and of sample serial correlations to functions of stable variables. Our asymptotics cover the null of iid variates and general moving average (MA) alternatives. Regression residuals are also considered. In the static regression model the Durbin-Watson statistic has the same limit distribution as the von Neumann ratio under general conditions. However, the dynamic models, the results are more complex and …

Identification And Characterization Of A Novel Class Of Pharmacologic Agents For The Reversal Of Multidrug Resistance, James Matthew Ford

Yale Medicine Thesis Digital Library

No abstract provided.

Bulletin Of Yale University School Of Nursing 1989-1990, Yale School Of Nursing

Yale School of Nursing Bulletins and Catalogues

Series 85, Number 10

September 1, 1989

Hypertrophic Response In Primary Single-Cell Culture Of Adult Rat Myocardial Cells, Phillip Chung-Ming Yang

Yale Medicine Thesis Digital Library

No abstract provided.

The Efficacy Of Advanced Life Support Versus Basic Life Support In The Pre-Hospital Care Of Trauma Victims, Craig Elfmon Fleishman

Yale Medicine Thesis Digital Library

No abstract provided.

Cholescintigraphy After Endoscopic Papillotomy In Patients With An Intact Gallbladder, Michael Alan Price

Yale Medicine Thesis Digital Library

No abstract provided.

Hepatitis B Virus And Hepatitis A Virus In Kingston, Jamaica : Maternal-Child Immunity, Jennifer Lee Hirsh

Yale Medicine Thesis Digital Library

No abstract provided.

Public Law No: 101-73 - Financial Institutions Reform, Recovery, And Enforcement Act Of 1989, U.S. Congress

Documents

No abstract provided.

Lender Of Last Resort: The Concept In History, Thomas M. Humphrey

Documents

No abstract provided.

Investigation Of Aqueous Humor Flow In The Rabbit With The Use Of Fluoresceinated Dextrans, Susan Redfield Carter

Yale Medicine Thesis Digital Library

No abstract provided.

The Interaction Between Developmental Striving And The Course Of Mental Disorder, Amy Allee Tyson

Yale Medicine Thesis Digital Library

No abstract provided.

The In Vivo Response To Peripheral Nerve Cryopreservation In An Animal Model, John Thomas Whalen

Yale Medicine Thesis Digital Library

No abstract provided.

Variation In Expression Of Na+K+Atpase Α And Β Subunit Mrnas In Rat Tissues And Nervous System Cell Lines, Susan Lynn Garetz

Yale Medicine Thesis Digital Library

No abstract provided.

Yale University School Of Medicine, Department Of Surgery Annual Report 1989-1990, Yale School Of Medicine Department Of Surgery

Yale Department of Surgery Bulletins

Annual report for 1989-1990.

The Response Of The Coastal Ocean To Strong Offshore Winds: With Application To Circulations In The Gulfs Of Tehuantepec And Papagayo, Julian P. Mccreary Jr., Hyong S. Lee, David B. Enfield

Journal of Marine Research

Two ocean models are used to investigate the response of the coastal ocean to strong offshore winds: a linear 1½-layer model, and a nonlinear 1½-layer model that allows entrainment of cool water into the surface layer. The models are forced by wind stress fields similar in structure to the intense winter-time, mountain-pass jets (∼20 dyne/cm²) that appear in the Gulfs of Tehuantepec and Papagayo for periods of 3–10 days. Solutions are arranged in a hierarchy of increasing dynamical complexity, in order to illustrate the important physical processes. They compare favorably with observations in several ways. Some properties of …

Longitudinal Dispersion Of Suspended Particles In Oscillatory Currents, Hidekazu Yasuda

Journal of Marine Research

This study has investigated theoretically longitudinal dispersion of suspended fine particles with settling velocity and revealed the dispersing behavior from the initial to the stationary stages in tidal oscillatory currents. A Stokes layer of the oscillatory current plays a remarkably significant role on dispersion of settling particles when the mixing time in cross-section is larger than the period of tidal oscillation. When the settling velocity exceeds a certain value, however, the dispersion coefficient of particles decreases with increasing settling velocity. In an oscillatory current with linear profile, settling velocity of dispersing particles decreases the value of the dispersion coefficient all …

Microscale And Finescale Variations Of Small Plankton In Coastal And Pelagic Environments, R. W. Owen

Journal of Marine Research

Small-interval water sampling in oceanic subsurface layers in a variety of macroenvironments for microplankton and for characteristics of their environment revealed concentration variations that often exceed errors of sampling and measurement. I report incidence and degree of microscale and finescale organism patchiness and their dependency on the local environment and on certain characteristics of the organisms themselves. Scale analysis indicates that patchiness occurs below as well as above the 20 cm intervals sampled. Incidence and degree of patchiness were about the same in separate eastern boundary regions, off California and Perú. Effects of environmental characteristics on organism patchiness are clearly …

Derivative Analysis Of Spectral Absorption By Photosynthetic Pigments In The Western Sargasso Sea, R. R. Bidigare, J. H. Morrow, D. A. Kiefer

Journal of Marine Research

Concurrent measurements of the spectral absorption coefficient and photosynthetic pigmentation of natural particulates were performed to determine the principal pigments responsible for the absorption of spectral irradiance in seawater. The spectral absorption coefficient, Ap(λ), was then analyzed by taking the second and fourth derivatives with respect to wavelength. The wavelength and magnitude of these derivative values provide useful information regarding the identification and quantification of phytoplankton pigments responsible for a given spectral signature. Linear relationships were examined and established between derivative values at selected wavelengths and concentrations of the major tetrapyrrole pigments, specifically chlorophylls a, b, and …

Wind-Driven Ocean Circulation And Equilibrium Statistical Mechanics, Annalisa Griffa, Rick Salmon

Journal of Marine Research

In this paper, we show that numerical solutions of the single-layer quasigeostrophic equation in a beta-plane basin approach the state predicted by equilibrium statistical mechanics when the forcing and dissipation are (unrealistically) zero. This equilibrium state, which we call Fofonoff flow, consists of a quasi-steady uniform westward interior flow closed by inertial boundary layers. When wind stress and bottom drag are switched on, we find that the nonlinear terms in the quasigeostrophic equation still try to drive the flow toward Fofonoff flow, but their success at this depends strongly on the geometry of the wind stress. If the prescribed wind …

On The Interaction Of Wind And Buoyancy Driven Gyres, Alain Colin De Verdière

Journal of Marine Research

The steady large scale oceanic response to wind stress and a surface buoyancy flux is studied by making use of a numerical model based upon the planetary geostrophic equations for which scales of motions smaller than the internal Rossby radius of deformation have been filtered out. In regions of both heat gain and Ekman convergence, the forcings combine to create a strong subtropical gyre in the upper thermocline. The north-south symmetry imposed by the wind pattern is broken because in a region of heat loss the density field shoals through the action of convection and the result is a broad …

Large-Scale Sst Anomalies Associated With Subtropical Fronts In The Western North Atlantic During Fasinex, George R. Halliwell Jr., Peter Cornillon

Journal of Marine Research

We describe the large-scale variability of sea surface temperature (T_s) and fronts in the western North Atlantic Subtropical Convergence Zone from January–June 1986 within an approximately 11° longitude by 10° latitude domain. Fronts were primarily found within interconnected bands separated by <500 km that tended to be located on the periphery of anisotropic T_s spatial anomaly features that propagated westward at about 3 km day^–1. Relatively weak and strong (small or large |∇T_s|) segments of the dominant zonally-oriented frontal band (the Subtropical Frontal Zone, or SFZ) shifted westward with these anomaly features, which had characteristic peak-to-peak space scales of up to ≈800 km …

Density Of The Major Size Groups Of Benthic Fauna And Trophic Input In Deep Basins Of The Atlantic Ocean, Myriam Sibuet, Claude E. Lambert, Roger Chesselet, Lucien Laubier

Journal of Marine Research

Seven deep-sea areas were studied in the Atlantic Ocean. An intensive and comparable benthic sampling program was conducted during several deep-sea biology cruises with IFREMER research ships and mainly with the RV Jean Charcot, in the Norwegian Sea, the Bay of Biscay, the Porcupine Seabight, the Vema Fracture Zone, the Demerara abyssal plain, the Cape Verde Basin, the Angola and Cape basins near the Walvis Ridge. A synthesis of community structure data has been realized and the benthic fauna, quantitatively sampled, was separated into three main size categories (meiofauna, macrofauna sensu stricto and megafauna). Comparison of population densities in …

Maximal Quantum Yield Of Photosynthesis In The Northwestern Sargasso Sea, J. S. Cleveland, M. J. Perry, D. A. Kiefer, M. C. Talbot

Journal of Marine Research

The magnitude and variability of the maximal quantum yield of photosynthesis were examined in the northwestern Sargasso Sea in April 1985. Maximal quantum yield was calculated from light-limited photosynthetic rates and spectrally-weighted absorption coefficients. The absorption by total particulates collected on a glass fiber filter was partitioned into two components, one associated with living phytoplankton and one associated with other absorbing particles. Two types of maximal quantum yield were calculated: one from the absorption by total particulates and one from the absorption by the phytoplanktonic component alone. Maximal quantum yield calculated from absorption by total particulates was low [0.014 to …

The Banco Ambrosiano Collapse And The Luxury Of National Lenders Of Last Resort With International Responsibilities, Ulrich Hess

Documents

No abstract provided.