Cessi, Paola

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), 1987. / Includes bibliographies. / by Paola Cessi. / Ph.D.

Noble, Marlene Ann

Thesis. 1975. M.S.--Massachusetts Institute of Technology. Dept. of Meteorology. / Bibliography: leaves 70-72. / M.S.

Vaskov, Alex Kikeri

Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012. / Cataloged from PDF version of thesis. Vita. / Includes bibliographical references (p. 63-65). / James Cameron's dive to the Challenger Deep in the Deepsea Challenger in March of 2012 marked the first time man had returned to the Mariana Trench since the Bathyscaphe Trieste's 1960 dive. Currently little is known about the geological processes and ecosystems of the deep ocean. The Deepsea Challenger is e...

Roemmich, Dean Howard

Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1980. / Microfiche copy available in Archives and Science. / Vita. / Bibliography : leaves 122-129. / by Dean Howard Roemmich. / Ph.D.

Wong, Angela Siu-Kan

Thesis (M. Arch.)--Massachusetts Institute of Technology, Dept. of Architecture, 1994. / Includes bibliographical references (p. 118-119). / Leisure. n. : Freedom from time-consuming duties, responsibilities, or activities. Regeneration. n. : 1. The act or process of regenerating or the state of being regenerated. 2. Spiritual or moral revival or rebirth. This thesis is concerned with public spaces and the notion of leisure and regeneration in American cities. In search of regeneration, American...

St. Laurent, Louis C

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 (leaves 129-139). / Observations of diapycnal mixing rates are examined and related to diapycnal advection for both double-diffusive and turbulent regimes. The role of double-diffusive mixing at the site of the North Atlantic Tracer Release Experiment is consi...

Fischer, Albert S. (Albert Sok)

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), 2000. / Includes bibliographical references (p. 217-222). / Estimation of the upper ocean heat budget from one year of observations at a moored array in the north central Arabian Sea shows a rough balance between the horizontal advection and time change in heat when the one-dimensional balance between the...

DesAutels, Christopher Gerald, 1975-

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2000. / Includes bibliographical references (leaves 32-33). / Hurricane intensification modeling has been a difficult problem for the atmospheric science community. Complex models have been built to simulate the process, but with only a certain amount of success. A model developed by Dr. Kerry Emanuel is much simpler compared to previous studies. The Emanuel model approaches hurricane inten...

Bowen, James Douglas

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1990. / Includes bibliographical references. / by James Douglas Bowen. / Ph.D.

Joubert, Warren Ryan

Includes bibliographical references. / The two principal bottom-up drivers of the High Nutrient Low Chlorophyll (HNLC) characteristics of the Southern Ocean are light and nutrient (mainly dissolved iron) limitation ( Boyd , 2002; Mitchell et al., 1991), which have varying limiting roles over the growing season ( Boyd, 2002; Swart et al., 2014). This research commenced with an investigation of the meridional characteristics of primary productivity in the Atlantic Southern Ocean during austral sum...

Manyilizu, Majuto Clement

Includes bibliographical references. / The oceanic circulation and properties in the Tanzanian shelf region in the tropical western Indian Ocean have been studied in this thesis using a regional ocean model. The study investigated the influences of the Northeast Madagascar Current (NEMC) in the Tanzanian shelf waters at the annual cycle. Furthermore, the thesis examined the interannual variability of the sea surface temperature (SST) in the Tanzanian shelf region, and compares it with that offsh...

Sovara, Mthetho Vuyo

Includes bibliographical references. / Modern studies have successfully linked Subtropical Dipole (SIOD) events to southern Africa?s austral summer precipitation patterns, however, none have investigated the SIOD?s influence on the Greater Agulhas Current System. Here, the SIOD climatology was developed using a Regional Ocean Modeling System (ROMS) configured with GFDL-CORE v.2b reanalysis winds and heat fluxes for the 1958-2007 period. This configuration allows for a relatively accurate spatial...

Preston, Edward Graham, 1937-

No description available.

Griffiths, Andrew Martin

Bibliography: pages 57-66. / The feasibility of obtaining information on the dispersion of seabirds at sea precise enough to reflect changes in their prey was investigated. A standardized technique for counting birds from a moving ship, designed to limit biases due to birds circling, following and/or deviating towards/from the ship, is suggested. An interspecific comparison of 31 seabird species was made to determine which species yielded the most accurate censuses. Although many species are att...

Duncombe Rae, Christopher Michael

The western boundary current rings shed from the Agulhas retroflection may be responsible for a considerable transfer of heat, salt and energy from the South Indian into the South Atlantic Ocean. Few hydrographic measurements have been collected from Agulhas rings in the South Atlantic Ocean and their characteristics and influence on the waters of the Cape Basin through which they pass are thus little known. The temperature, salinity, and nutrient data presented in the thesis were collected from...

Le Roex, Anton Powter

Bibliography: p. 238-268. / Bulk rock compositional variations in lavas from four localities in the Atlantic Ocean are evaluated quantitatively in terms of fractional crystallisation and partial melting models. Samples studied are from the Mid-Atlantic Ridge at 36°49 'N (FAMOUS), from the Islas Orcadas fracture zone on the Southwest Indian Ocean Ridge, from the Conrad fracture zone on the America-Antarctica Ridge and from Bouvet Island, situated at the southernmost tip of the Mid- Atlantic Ridge...

Carey, Joanna C.

The alteration of the global environment by human activities is so widespread that scientists argue we've entered a new geologic epoch known as the Anthropocene. This dissertation examines the impact of human activities on biogeochemical cycling at the land-sea interface. I focus primarily on the role of land use/land cover (LULC) and coastal nutrient enrichment on silicon (Si) cycling in New England rivers and salt marshes. On land, Si is taken up by vegetation, improving plant fitness and pro...

Thaler, Mary

Dans les environnements marins arctiques, les protistes unicellulaires constituent les premiers maillons du réseau trophique. Les flagellés hétérotrophes (HF) jouent un rôle clé au sein de ce réseau trophique comme brouteurs de bactéries et de phytoplanctons, étant broutés à leur tour par les microzooplanctons comme les dinoflagellés ou les ciliés. Les scientifiques prévoient que les changements environnementaux extrêmes qui ont présentement lieu dans l’Océan Arctique transformeront ces communau...

Lewis, Colin A

[From the introduction]: The landforms of the Albany, Alexandria and Bathurst Districts in the area between Grahamstown and the sea are the product of many different geomorphological processes that have operated for well over 150 million years. The evolution of landforms normally occurs over a very long time and is usually highly complex. As a result it is difficult for a human being, whose allocated span on Earth is of the order of three score years and ten, to appreciate the time involved in t...

abstract: Atmospheric particulate matter has a substantial impact on global climate due to its ability to absorb/scatter solar radiation and act as cloud condensation nuclei (CCN). Yet, little is known about marine aerosol, in particular, the carbonaceous fraction. In the present work, particulate matter was collected, using High Volume (HiVol) samplers, onto quartz fiber substrates during a series of research cruises on the Atlantic Ocean. Samples were collected on board the R/V Endeavor on Wes...

Ding, Li

The work presented in this thesis consists of two parts: development and application of a novel passive acoustical approach for field measurement of breaking surface waves, and interpretation of the resulting observations in terms of wave field information so as to improve the understanding of wave breaking. The development of the acoustical approach has been motivated by the difficulties inherent in measurement of breaking waves. This approach makes use of an array of four broadband hydropho...

Rash, Jonathan Paul Stuart

The region of the South Atlantic and Southern Oceans ... is of considerable interest in ionospheric and aeronomic research owing to the presence of several 'anomalies'. The most notable of these is the South Atlantic (or Brazilian) Anomaly associated with the global minimum of magnetic field intensity off the coast of Brazil (Introduction, p. 1)

Froneman, Pierre William

A 3-year study was carried out on the role of microzooplankton in carbon cycling in the south Atlantic and the Atlantic sector of the Southern Ocean. Microzooplankton grazing impact on phytoplankton was estimated during austral summer and winter employing the dilution technique. Carnivory by larger zooplankton on microzooplankton during summer was estimated using in vitro incubations. Microzooplankton assemblages were always dominated by protozoans comprising ciliates and dinoflagellates. In the...

Motah, Beenesh Anand

The Indian Ocean Tuna Commission conducted a small-scale tagging programme (2002-2009) and also a large-scale tagging programme: the Regional Tuna Tagging Programme of the Indian Ocean (RTTP-IO, 2005-2009). Both tagging programmes known as the Indian Ocean Tuna Tagging Project (IOTTP), targeted three main species of tuna commercially exploited in the Indian Ocean: bigeye (Thunnus obesus), skipjack (Katsuwonus pelamis) and yellowfin (Thunnus albacares). The two programmes tagged 219,149 tuna and ...

Takano, Yohei

A widely observed tracer in the field of oceanography is dissolved oxygen (O2). A tracer crucial to ocean biogeochemical cycles, O2 plays an active role in chemical processes, marine life, and ecosystems. Recent advances in observation and numerical simulation have introduced opportunities for furthering our understanding of the variability and long-term changes in oceanic O2. This work examines the underlying mechanisms driving O2 variability and long-term changes. It focuses on two distinct t...

Taylor, F J R

Although the phytoplankton of the waters off the west coast of South Africa (the Benguela Current region) has been the subject of several detailed studies in the past, data on that of the S.W. Indian Ocean has been almost entirely restricted to incidental references in the reports of expeditions which have passed through the area. Consequently, little has been known of the species composition and distribution of the phytoplankton, and nothing of its seasonal fluctuations. This study was designed...

de Campos e Rodrigues, Luís Miguel

Esta tesis analiza los efectos socio-económicos de la acidificación oceánica y del calentamiento del Mediterráneo. Estas presiones ambientales vienen provocadas por el incremento de las emisiones de CO2 desde la Revolución Industrial. La combinación de estas presiones puede tener consecuencias negativas sobre hábitats y especies (p.e., coralígeno, bivalvos y gorgonias) junto con pérdidas económicas para la acuicultura y el turismo. Esta tesis ha investigado dichas pérdidas, desarrollando las si...

Hurwitz, Bonnie, Hallam, Steven, Sullivan, Matthew

BACKGROUND:Marine ecosystem function is largely determined by matter and energy transformations mediated by microbial community interaction networks. Viral infection modulates network properties through mortality, gene transfer and metabolic reprogramming.RESULTS:Here we explore the nature and extent of viral metabolic reprogramming throughout the Pacific Ocean depth continuum. We describe 35 marine viral gene families with potential to reprogram metabolic flux through central metabolic pathways...

Pedroza, Moises

International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada / The Transportable Range Augmentation and Control System (TRACS), Mobile Telemetry System (MTS), is a versatile system capable of supporting anywhere when called upon. The MTS is designed to operate anywhere on land. It is unknown how the system will perform on a floating platform without a stabilizing gimbal. The operation of a tracking system at sea generally requir...

Parker, Bhawoodien Abbasmia

This work examines SW Indian Ocean tropical cyclone (TC) structure as a function of movement using ECMWF gridded data. Analyses of the mean summer climate for the period 1987­ 1992 shown that conditions conducive to the development ofTCs are present between the latitudes 5° and 15°S. Six westward moving TCs are selected to form the westward moving composite TC and four are used in the recurving TC composite from 3-days before the maximum surface intensity to 1­ day after. The westward moving com...

Harlander, Uwe, Metz, Werner

Die Ausbreitungspfade und die strukturelle Veränderung von quasi geostrophischen Rossby-Wellenpaketen werden mittels der WKB-Methode untersucht. Es wird angenommen, daß die Wellenpakete an einem in Ost-West-Richtung verlaufenden festen Rand reflektiert werden können. Die Dynamik der Rossby-Wellenpakete wird auf der ß-Ebene aber auch auf der sogenannten d-Oberfiäche - wo auch die zweite Ableitung des Coriolis-Parameters eine Rolle spielt - studiert. Es wird gezeigt, daß die Wellenpakete unter bes...

Khatri, Hemant

The dynamics captured in the ocean surface current data provided by satellite altimetry has been a subject of debate since the past decade. In particular, the contribution of surface and interior dynamics to altimetry remains unclear. One avenue to settling this issue is to compare the turbulence (for example, the nature of spectra and interscale fluxes) captured by altimetry to theories of two-dimensional, surface and interior quasigeostrophic turbulence. In this thesis, we focus on mesoscales ...

Smith, Katherine Margaret

<p> In this dissertation, Large Eddy Simulations (LES) are used to model the coupled turbulence-reactive tracer dynamics within the upper mixed layer of the ocean. Prior work has shown that LES works well over the spatial and time scales relevant to both turbulence and reactive biogeochemistry. Additionally, the code intended for use is able to carry an arbitrary number of tracer equations, allowing for easy expansion of the species reactions. Research in this dissertation includes a study of 15...

Aguirre Galaz, María Catalina

Doctor en Ciencias de la Ingeniería, Mención Fluidodinámica / En esta tesis se estudian los mecanismos físicos involucrados en el forzamiento atmosférico del océano superficial a escala estacional y sinóptica frente a Chile central. Para esto, se utilizaron observaciones disponibles (in-situ y derivadas de satélite) y simulaciones numéricas. Este trabajo está particularmente enfocado en el forzamiento del viento. El ciclo estacional de la circulación superficial frente a Chile central fue anal...

Ramberg, Andreas

This thesis aims to solve the mathematical inverse problem of characterizing sea waves based on the responses obtained from a marine vessel sailing under certain sea conditions. By researching this problem the thesis contributes to the marine industry by improving products that are using ocean behavior for controlling ship's dynamics. Knowledge about the current state of the sea, such as the wave frequency and height, is important for navigation, control, and for the safety of a vessel. This inf...

Shelford, Emma Joyce

Current studies indicate that viruses of marine bacteria are biological carbon sinks, transforming bacterial carbon into dissolved organic matter, the majority of which is respired rather than incorporated back into biomass. In contrast, this dissertation focusses on viruses, not as a carbon sink but as a catalyst of nitrogen cycling, benefiting phytoplankton by liberating nitrogen from bacterial lysates that would otherwise be tied up in bacterial biomass. The results in this dissertation show ...

Vaughan, Megan Lillian Hatfield

The need to understand future changes in marine ecosystems has become critically important as increasing atmospheric carbon dioxide (CO₂) drives rapid ocean acidification (OA). OA may improve or reduce the performance of marine species, and the relative impacts on interacting species will largely determine changes at the community level. The goal of this thesis was to determine the effects of acidification on predator-prey interactions between red sea urchins (Strongylocentrotus franciscanus) an...

Tamsitt, Veronica

<p> The circulation of the Southern Ocean is unique due to the lack of meridional boundaries at the latitudes of Drake Passage. Westerly winds drive the Antarctic Circumpolar Current (ACC), linking the major ocean basins and facilitating inter-basin exchange of properties. Additionally, the steeply tilted isopycnals in the Southern Ocean allow interaction between the deep ocean and the atmosphere, and as a result the Southern Ocean has an outsized contribution to the global uptake and redistribu...

Hamilton, Andrew Kent

Picoeukaryotes (0.2 - 3 urn) dominate the planktonic biomass of the Arctic Ocean for most of the year, strongly influencing primary production and carbon and nutrient cycles. Despite their importance in this cold-ocean ecosystem, little is known about factors controlling picoeukaryote diversity and distribution. Picoeukaryote community composition and distribution in relation to the physical characteristics of the water column was investigated, and we introduce the term biohydrography to de...

Denman, Kenneth Leslie

A model describing the time dependent response of the upper mixed layer of the ocean to meteorological forcing is developed. The turbulent mixing and the radiative heating are expressed so that only simple input parameters available from routine meteorological measurements are required. The model is sensitive to the rate of production by the wind stress of energy available for mixing, and to the rate of absorption with depth of the solar radiation. Observations obtained at Ocean Station 'Papa' ...

Cummins, Patrick F.

A limited-area quasi-geostrophic numerical model with mesoscale resolution is developed to study the circulation in the Northeast Pacific Ocean. The model domain extends from the British Columbia/Alaska coast out to 170°W and down to 45°N, and incorporates the coastline geometry and bottom topography of the region. In a benchmark experiment, the circulation is driven with a steady, climatological wind stress curl field. Statistical properties of the solution are determined from a long-term inte...

Drent, Jan

The dimensions and periods of waves on the oceans are still very imperfectly known, as can be seen from the divergent opinions expressed by the relatively few authorities who have occupied themselves with this problem. For many years I have endeavoured to observe waves at sea. The results of these observations are given in Part I, both in graphical and tabular form. The directly determined quantities were wave height and wave period, both being based on visual observation. A distinction was car...

Lakshmipathi, Sondur

No description available.

Techow, N M S Mareile

Includes bibliographical references (leaves 199-212) / This thesis investigates the phylogeography of four southern ocean petrel species in an attempt to resolve taxonomic uncertainties and phylogeography in these species. A large proportion of petrel and albatross species are listed as threatened under Red List criteria, in many cases as a result of threats at sea. Most albatrosses and petrels breed in discrete island colonies and exhibit strong natal philopatry. They may thus be expected to sh...

Jackson, Sarah

The biogeochemical cycling of oceanic dissolved cadmium (dCd) has been an active area of research for the past ~40 years, due in part to the close correlation with phosphate (PO4). The global Cd:PO4 relationship has led to the use of microfossil Cd/Ca as a paleoproxy for ocean circulation and nutrient utilization; however considerable spatial and temporal variability in the relationship - particularly in surface waters - limits the utility of the proxy. Understanding the global biogeochemical cy...

Pemberton, Per

This thesis explores freshwater-related processes and water mass transformation in the Arctic Ocean. Knowledge of these processes is important from both a local and a global perspective. Globally, because the export of cold and low saline water and sea ice might influence the North Atlantic and global meridional overturning circulation. Locally, because freshwater processes affect the vertical stratification and permit favorable conditions for the ice cover. Models of different complexity are th...

Sowa, Stephanie Marie

No description available.

Hughes, Tertia

An idealized box model of the Indian Ocean is used to examine the hypothesis proposed by Godfrey and Weaver (1991) that the buoyancy-forced Leeuwin Current off the west coast of Australia is a manifestation of a basinwide thermohaline circulation driven by the Indonesian throughflow. / The stronger Sverdrup circulation dominates the thermohaline circulation in most of the model ocean except near the eastern boundary. / The western boundary currents apparently play a very minor role in this basin...

Bullock, Timothy A. (Timothy Augustine)

This study's goal is to quantify the influence of large-scale forcing on surface cyclogenesis. This is accomplished by considering seventy surface cyclones, whose maximum deepening occurs in the western North Pacific Ocean. Cyclone classification is based on this pressure change, ranging from +10 to $-$40 hPa/24 h. Composite surface, 850 and 500 hPa analyses for each class, constructed from NMC gridded data are used to diagnose quasi-geostrophic omega and frontogenetical forcing and static stabi...

Holland, David M.

A numerical model study of the seasonal cycle of sea-ice cover and ocean circulation in the Arctic Ocean is presented. The investigation is carried out in four parts using the coupled sea ice-ocean model of Oberhuber (1993a). The Oberhuber model is the first global ocean general circulation model to use Lagrangian isopycnal coordinates. First, a sensitivity study is given of the sea-ice model, which is both dynamic and thermodynamic. The robustness of the sea-ice component in an uncoupled mode i...