Pellichero, Violaine

L'océan Austral est une région clé pour la compréhension de la circulation océanique globale et du climat. C'est dans cette région qu'une large majorité des eaux de la planète est ventilée dans la couche de surface avant d'être réexpédiée dans l'océan profond. Ainsi la couche de surface de l'océan Austral est un élément central pour la compréhension de la circulation océanique planétaire. Malgré leur rôle fondamental dans la circulation océanique globale et dans le climat, la structure et les ca...

Michel, Anna Pauline Miranda, 1976-

Thesis (Ph. D.)--Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and the Woods Hole Oceanographic Institution), 2007. / Includes bibliographical references. / Present-day expeditionary oceanography is beginning to shift from a focus on short-term ship and submersible deployments to an ocean observatory mode where long-term temporally-focused studies are feasible. As a result, a critical need for in situ ...

Schnepf, Neesha Regmi

Thesis: S.M., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 2015. / Cataloged from PDF version of thesis. / Includes bibliographical references. / The 20 th century brought many breakthroughs in our understanding of Earth, but there are still many outstanding geophysical questions. Deep electromagnetic studies provide information on electrical conductivity from the near-surface to deep within the mantle (~1600 km) complementing seismic work aimi...

Young, Grace Calvert

Thesis: S.B. in Mechanical & Ocean Engineering, Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014. / Cataloged from PDF version of thesis. / Includes bibliographical references (pages 46-50). / Tens of billions of dollars are spent on manned and unmanned missions probing deeper into space, while 95% of Earth's oceans remain unexplored. The more intensive focus on space exploration is a historically recent phenomenon. For millennia until the mid-20th century, space...

Holian, Gary Louis, 1972-

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1998. / Includes bibliographical references (leaves 90-95). / by Gary Louis Holian. / S.M.

Natália Tasso Signorelli

The South Atlantic has a relevant role on the AMOC variability as it includes two main conduits of its upper-ocean return flow: the NBUC and the IWBC that carry, mainly, the SACW and the AAIW and are originated from the bifurcation of the SEC. One of the hypotheses of this work is that analyzing the bifurcation variability it is possible to get an index of the AMOC changes. Another hypothesis is that in a global warming scenario, changes in the hydrological cycle would drive modifications in the...

Wanamaker, Alan D.,

Thesis (Ph.D.) in Earth Sciences--University of Maine, 2007. / Includes vita. Includes bibliographical references (leaves 106-129).

Abrahamsson, Bernhard J.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1994. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Clemente, Tara M

Thesis (M.S.)--University of Hawaii at Manoa, 2007. / Includes bibliographical references (leaves 79-92). / x, 92 leaves, bound ill. (some col.) 29 cm

Witherington, Philip Dalton

No description available.

Welch, C. S. (Christopher Slocombe)

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1972. / Vita. / Bibliography: p. 186-188 / Ph.D.

Rintoul, Stephen R. (Stephen Rich)

Thesis (Ph. D.)--Joint Program in Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 1988. / Includes bibliographical references. / Inverse methods are applied to historical hydrographic data to address two aspects of the general circulation of the Atlantic Ocean. The method allows conservation statements for mass and other properties, along with a variety of other constraints, to be combined in...

Currie, Jock C

Study of the Indian Ocean has lagged behind that of the Atlantic and Pacific, with large knowledge gaps remaining in our understanding of regional or basin-scale controls on productivity and higher trophic levels. A lack of in situ data, especially for mid and upper trophic-level organisms, has commonly limited to small spatiotemporal scales, investigations into environmental control of biological systems. These data gaps are increasingly being filled by coupled bio-physical ocean models. Throug...

Sörman Laurien, Elvira

No description available.

Goodlad, Stephen W, Goodlad, Stephen W

The Natal Valley is a sediment-filled marine basin situated between the east coast of southern Africa (Natal) and the Mozambique Ridge. Geophysical and sedimentological techniques are used in a broad geological study of the mid Natal Valley. Major emphasis is directed to: (a) basin history and tectonic evolution; (b) seismic stratigraphy of the basin fill; (c) recent sedimentary processes and responses. General basin morphology is defined by five major physiographic provinces: continental shelf ...

IAM-FEI, PUN

Thesis (M.A.)--National Taiwan Normal University / Includes bibliographical references

Sensitivities of the net heat flux into the deep-ocean (Qnet) and of the deep-ocean heat content (DOC) below 700 m are studied using an ocean general circulation model and its adjoint. Both are found to have very similar sensitivities. The sensitivity to the surface freshwater flux (E-P-R) is positive in the Atlantic, but negative in the Pacific and Southern Ocean. A positive sensitivity to the downward net surface heat flux is found only in the North Atlantic north of 40 degrees N and the South...

Prugh, Brian Joseph

The thesis is composed of two major parts: part one includes a statement, images and a reflection on a body of work entitled "The Ocean Is What I Meant By." These works are constructed of layers of cut tulle mounted in painted wooden frames, in which words cut out of the fabric interact to create abstract pictorial spaces. The second part of the thesis examines of the historical role of theory in the conceptualization and production of art. I argue that theory has historically occupied itself wi...

Peters, Karsten, Quaas, Johannes, Bellouin, Nicolas

We present a method for deriving the radiative effects of absorbing aerosols in cloudy scenes from satellite retrievals only. We use data of 2005–2007 from various passive sensors aboard satellites of the “A-Train” constellation. The study area is restricted to the tropical- and subtropical Atlantic Ocean. To identify the dependence of the local planetary albedo in cloudy scenes on cloud liquid water path and aerosol optical depth (AOD), we perform a multiple linear regression. The OMI UV-Aeroso...

Wang, Dayang, Ph. D. Massachusetts Institute of Technology

Thesis: S.M., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2016. / Cataloged from PDF version of thesis. / Includes bibliographical references (pages 44-46). / This paper presents an experimental study of the behavior of oil plumes in ambient stratification and a mild current, in which the flow is classified as stratification-dominated. Experiments are conducted in an inverted framework by releasing a continuous stream of dense glass beads from a carr...

Miguel Campos Pinto Coelho Aguiar

O problema de geração e otimização de trajetórias para veículos marítimos tem atraído a atenção tanto da indústria como do setor de investigação. Na indústria, a motivação é a redução dos tempos de viagem e custos de combustível, com atenção especial para rotas longas. Neste contexto, resultados da área de roteamento de navios mostram que a poupança de combustível obtida pelos algoritmos existentes é fortemente afetada por padrões existentes nas correntes oceânicas. No setor de investigação, a m...

Interannual and interdecadal variability of the equatorial Pacific are examined using a new 60-year monthly historical pseudo-stress data set. The monthly mean pseudo-stress fields (1930-1989) are assembled from Comprehensive Ocean-Atmosphere Data Set pseudo-stresses using a variation of Cressman's (1959) objective analysis scheme, climate basis functions obtained from the FSU pseudo-stress product (1966-1990) and a technique called Vector Group Renormalization. The new wind fields are used to f...

Changes in the amount of dissolved oxygen concentration in the Sea of Japan (SOJ) over a number of years have been hypothesized to be due to the amount and depth of deep convection in this region. The first observations of the changes in oxygen concentration at depth due to deep convection in near-real time occurred during a recent Office of Naval Research-sponsored program, which included both ship tracks and floating buoy measurements. In general the process of deep convection has been divided...

The objective of this study is to study spatial and temporal paleontological distributions as they relate to the histories of Ninetyeast Ridge and Broken Ridge from ODP Leg 121. This study is important for establishing connections between different fossil assemblages, especially between those of the high latitudes and those of low latitudes. The assemblages were used to perform biostratigraphic analyses of sequences on Ninetyeast Ridge and Broken Ridge in the Indian Ocean and t...

Wang, Dayang,Ph. D.Massachusetts Institute of Technology.

Thesis: Ph. D., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2019 / Cataloged from PDF version of thesis. / Includes bibliographical references. / This thesis analyzes the flow and transport of multiphase plumes that result from a dispersed phase (e.g., droplets or particles) being discharged continuously into a stratified flowing ambient. Results are relevant to a wide range of natural and man-made applications, including the transport of oil droplet...

Chechelnitsky, Michael Y. (Michael Yurievich), 1972-

Thesis (Ph. D.)--Joint Program in Physical Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 1999. / Includes bibliographical references (p. 206-211). / Data assimilation methods, such as the Kalman filter, are routinely used in oceanography. The statistics of the model and measurement errors need to be specified a priori. In this study we address the problem of estimating model and measurement...

Brown, Stephanie Marie, Ph.D. Massachusetts Institute of Technology

Thesis: S.B., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, June 2010. / Cataloged from PDF version of thesis. / Includes bibliographical references (pages 29-33). / The size of the Mercurian core and the low ferrous iron bearing silicate content of its crust offer constraints on formation models for the planet. Here we consider a bulk composition that allows endogenous formation of the planet's large core, and by processing the mantle through a...

Levang, Samuel J.(Samuel James)

Thesis: Ph. D. in Physical Oceanography, Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2019 / Cataloged from PDF version of thesis. / Includes bibliographical references (pages 121-133). / Global patterns of ocean salinity arise from the exchange of freshwater between the sea surface and the atmosphere. For a quasi-steady state sys...

Rohr, Tyler W.

Thesis: Ph. D., Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2019 / Cataloged from PDF version of thesis. / Includes bibliographical references (pages 193-220). / Southern Ocean net community productivity plays an out sized role in regulating global biogeochemical cycling and climate dynamics. The structure of spatial-temporal var...

Church, Matthew J.

No description available.

Wor Lima, Catarina

No description available.

Stauffer, Thomas B.

No description available.

Hargraves, Paul Eric

No description available.

Carmigniani, Rémi

Comment générer des courants à partir des vagues ? En s'inspirant de la nature et particulièrement des pompes à impédance, deux systèmes permettant de pomper avec des vagues sont étudiés : la pompe à résonance et les vagues au dessus d'une plaque submergée. Dans cette étude, l'origine de l'écoulement est reliée au terme de transport de masse des vagues dans la couche de surface. Il correspond à la quantité de masse déplacée par les vagues entre la crête et le creux au cours d'une période. Ce ter...

The treatment of scattering from submerged objects in an unbounded environment is of considerable interest to both the academic and technological communities. Several approaches have yielded results for different classes of problems and have proven manageable for the free environment case. The problem of scattering in a confined environment has proven more difficult to formulate in a form useful for calculation due to the coupling of effects from the scattered object with that of the boundaries....

acase@tulane.edu

Zinc acts as a micronutrient in the ocean, capable of influencing and potentially controlling phytoplankton productivity and community structure. Thus, it is important to quantify the distribution of dissolved Zn in the oceans, in addition to understanding the biogeochemical behavior of this important element. Meeting this objective has been elusive since dissolved Zn concentrations in the upper water column can be extremely low, and it is difficult to eliminate contamination during sample colle...

The exchange of momentum, heat, moisture, and gas across the air-sea interface plays a crucial role in atmospheric and oceanic circulations on variety of spatial and temporal scales. That is why improved understanding and realistic simulations of air-sea flux are critical to advancing oceanic and atmospheric prediction capabilities. This study provides the first detailed analysis of oceanic and atmospheric responses to the current-stress, wave-stress, and wave-current-...

A tropical atmosphere-ocean coupled model is used to study the effects of a zonally sloping thermocline on the coupled oscillatory modes in the tropics. A two and one half layer oceanic model is coupled with the steady state Gill's atmospheric model. A constant depth mixed layer is included in the upper layer. The SST is calculated in the mixed layer. The interface of the two upper layers is sloping and prescribed as the observed 20$\sp\circ$C isotherm in the Pacific Ocean. The formula of Seager...

The Bering Strait's Grip On The World Climate: The Holocene interglacial period of the last 10,000 years and the penultimate interglacial ~125,000 years ago have been characterized by distinctly stable climates. During the intervening glacial period, climate records are marked by rapid large-amplitude oscillations, general known as Dansgaard-Oeschger events. These millennial-scale cycles are generally believed to be a result of freshwater anomalies in the North-Atlantic, followed by a reorganiza...

In this paper, the possibility of using a Small Water-plane Area Twin Hull (SWATH) as an unmanned Arctic scientific research vessel is analyzed. Before carrying out the stability analysis of the SWATH ship, this paper briefly outlines the importance of the Arctic survey, which guides the importance of the new research ship for Arctic scientific exploration. In addition to being used as a long-tern monitoring and data collection platform, it is also used as a recovery mothership for autonomous eq...

An Ocean Current Turbine (OCT) numerical simulation for creating, testing and tuning flight and power takeoff controllers, as well as for farm layout optimization is presented. This simulation utilizes a novel approach for analytically describing oceanic turbulence. This approach has been integrated into a previously developed turbine simulation that uses unsteady Blade Element Momentum theory. Using this, the dynamical response and power production of a single OCT operating in ambient tur...

On August 5, 2010 the U.S. Department of Energy (DOE) has designated the Center for Ocean Energy Technology (COET) at Florida Atlantic University (FAU) as a national center for ocean energy research and development. Their focus is the research and development of open-ocean current systems and associated infrastructure needed to development and testing prototypes. The generation of power is achieved by using a specialized electric generator with a rotor called a turbine. As with all machines, the...

On August 5, 2010 the U.S. Department of Energy (DOE) has designated the Center for Ocean Energy Technology (COET) at Florida Atlantic University (FAU) as a national center for ocean energy research and development of prototypes for open-ocean power generation. Maintenance on ocean-based machinery can be very costly. To avoid unnecessary maintenance it is necessary to monitor the condition of each machine in order to predict problems. This kind of prognostic health monitoring (PHM) requires a co...

A composite 3 meter ocean current turbine blade has been designed and analyzed using Blade Element Theory (BET) and commercial Finite Element Modeling (FEM) code, ANSYS. It has been observed that using the numerical BET tool created, power production up to 141 kW is possible from a 3 bladed rotor in an ocean current of 2.5 m/s with the proposed blade design. The blade is of sandwich construction with carbon fiber skin and high density foam core. It also contains two webs made of S2-glass for add...

This thesis presents the analytically predicted position, motion, attitude, power output and forces on Florida Atlantic University's (FAU) first generation ocean current turbine for a wide range of operating conditions. These values are calculated using a 7- DOF dynamics simulation of the turbine and the cable that attaches it to the mooring system. The numerical simulation modifications and upgrades completed in this work include developing a wave model including the effects of waves into the s...

An assessment of the thermal resource in the Straits of Florida was performed to estimate the Ocean Thermal Energy Conversion (OTEC) potential. Direct measurements of the temperature profile across the Florida Straits were taken from nearshore Southeast Florida to the Exclusive Economic Zone boundary along four evenly spaced transects perpendicular to Florida's Southeast coast, spanning 160 km. Along the southern transects in summer, nearshore cold and warm water resources meet or exceed the ave...

A three-dimensional parabolic equation (PE) and perturbation approach is used to invert for the depth- and range-dependent geoacoustic characteristics of the seabed. The model assumes that the sound speed profile is the superposition of a known range-independent profile and an unknown depth- and range-dependent perturbation. Using a Green’s function approach, the total measured pressure field in the water column is decomposed into a background field, which is due to the range-independent pr...

Thiam, Amadou Gallo

Thesis (Ph.D.)--Boston University / This thesis is concerned with devices that convert ocean wave energy to electrical energy, and specifically with devices that are composed of a sequence of linked cylinders that nominally float half-submerged on the surface of the ocean. An example is the Pelamis Wave Energy Converter, which is manufactured by Pelamis Wave Power, a company headquartered in Scotland. The thesis is broader in scope, and the results should be applicable to a wide variety of devic...

Terhaar, Jens

Coastal oceans play an important role in the carbon cycle and are hotspots of ocean primary production and ocean acidification. These coastal regions are strongly influenced by rives, especially in the Arctic. Despite the importance of the riverine delivery of carbon and nutrients, their effect on the Arctic Ocean is still poorly understood due to hostile conditions and the consequently low number of observations. This thesis aims at improving our understanding of the influence of Arctic riverin...