Wooster, Michael H.

No description available.

Diunizio, Mark

No description available.

Etro, James Francis

No description available.

Cummings, Walter James, Jung, Glenn H.

No description available.

Dreyer, Gregory Frank.

No description available.

Hesser, William A.

The Fleet Numerical Meteorology and Oceanography Center (FNMOC) has the charter to provide Special Sensor Microwave/Imager (SSMI) data to the DOD and the NOAA. This has led FNMOC to examine new methods for processing SSM/I data to generate SSM/I products. Of particular interest is the ability to use the SSM/I to remotely sense ocean surface winds. For this study four candidate wind retrieval algorithms initially proposed at the SSM/I Algorithm Symposium held in June, 1993 are examined for potent...

Tran, Vinh X.

The sensitivity of numerical solutions of systems of nonlinear flow equations (Navier-Stokes equations) to the grid used is investigated through the use of the South China Sea (SCS) numerical ocean model. Traditionally, rectangular coordinate grids are used in environmental modeling. The advantage of rectangular coordinate grids is their simplicity in the generation process. However, rectangular coordinate grids are not well suited for regions with complex terrain (coastlines and topography) and...

Stanley, Geoffrey John

Previous numerical and theoretical results based on constant diapycnal diffusivity suggested the abyssal meridional overturning circulation (MOC) should weaken as winds over the Southern Ocean intensify. We corroborate this result in a simple ocean model, but find it does not hold in more complex models. First, models with a variable eddy transfer coefficient and simple yet dynamic atmosphere and sea-ice models show an increase, albeit slightly, of the abyssal MOC under increasing winds. Second,...

Abbott, Kirsten L

Abstract not available

Nordstrom, Chad Andrew

Habitat characteristics and mechanisms that enable predators to successfully forage are poorly understood in open marine ecosystems. I addressed this problem in the eastern Bering Sea using animal-born data-loggers carried by lactating northern fur seals (Callorhinus ursinus) from two populations breeding in distinct oceanographic zones — a declining population on St. Paul Island on the continental shelf, and an increasing population on Bogoslof Island over the oceanic basin. The data-loggers ...

Alsweiss, Suleiman Odeh

The analysis of these satellite data provided confidence in the capability of the simulation to generate realistic active/passive measurements at the top of the atmosphere. Results are very encouraging, and they show that the new algorithm can retrieve accurate ocean surface wind speeds in realistic hurricane conditions using the rain corrected Ku-band scatterometer measurements. They demonstrate the potential to improve wind measurements in extreme wind events for future wind scatterometry miss...

Luck, Rodney K.

The two dimensional orthogonal function expansion technique was used to model discrete ocean bathymetric data as a function of cross range and down range, and to model discrete sound speed data as a function of depth and down range. The technique was tested and validated via computer simulation. It was shown to have many positive features, but the approach is flawed by the set of generating functions that were selected. A reflection angle algorithm for arbitrary two dimensional ocean bottom mode...

Lundell, Glen W.

No description available.

Aase, Marit

Ocean acidification, as a result of the increased concentration of carbon dioxide in the ocean, poses a threat towards marine ecosystems through lowered pH and altered seawater chemistry. The marine copepod Calanus finmarchicus is an ecologically and socioeconomically important species. In this study C. finmarchicus collected in Trondheimsfjorden was exposed to a CO2 concentration relevant for year 2300 (~2080 ppm) for two consecutive generations in the laboratory. The ability of C. finmarchicus...

Catry, Thibault

Most basaltic volcanoes are affected by recurrent lateral instabilities during their evolution. Numerous factors have been shown to be involved in the process of flank destabilization occurring over long periods of time or by instantaneous failures. However, the role of these factors on the mechanical behaviour and stability of volcanic edifices is poorly-constrained as lateral failure usually results from the combined effects of several parameters. Our study focuses on the morphological and str...

Muir, Stewart John

France was late to enter the European race for empire in Asia, but it was the earliest nation to employ colonial research gardens to organize the push eastward. The French botanical vanguard settled on the Mascarene Islands in the Indian Ocean where, beginning in the 1730s, a series of gardens contributed to France’s imperial fortunes and provided a model for later plant research networks in other European empires. In spite of past interpretations of French colonial science, there emergences a c...

Izumi, Ryusuke

Sediment trap particle flux data analysis and development of a model representation of mineral “ballast” mechanism for carbon transport in the ocean is presented in this study. The validity of several classical POC remineralization models as well as recently hypothesized “ballast” mechanism based POC remineralization models were tested by analyzing data from selected 79 sediment traps at >1500 m from around the world. POC flux modelled with different variations of model representations at ea...

Sackville, Michael

Pink salmon (Oncorynchus gorbuscha) enter seawater (SW) following gravel emergence at a body mass of 0.2 g. Two hydromineral challenges associated with this remarkable early ocean entry were investigated: (1) initial exposure to a hyper-osmotic environment and (2) sea louse (Lepeophtheirus salmonis) parasitism. To survive SW, pink salmon were hypothesized to develop hypo-osmoregulatory abilities as larval alevins prior to natural SW entry as post-larval fry. To test this, alevins and fry were ...

Catry, Thibault <1985>

Most basaltic volcanoes are affected by recurrent lateral instabilities during their evolution. Numerous factors have been shown to be involved in the process of flank destabilization occurring over long periods of time or by instantaneous failures. However, the role of these factors on the mechanical behaviour and stability of volcanic edifices is poorly-constrained as lateral failure usually results from the combined effects of several parameters. Our study focuses on the morphological and str...

Wang, Jia, 1957-

In part 1, the spatial and temporal relationships between subarctic Canadian sea-ice cover and atmospheric forcing are investigated by analyzing sea-ice concentration, sea-level pressure, and surface air temperature, as well as ice thickness, runoff, and sea surface temperature, from 1953-1988. The sea-ice anomalies in Hudson Bay, Baffin Bay and the Labrador Sea are found to be related to the North Atlantic Oscillation (NAO) and the Southern Oscillation (SO). From the application of a spatial St...

Rose, George A.

I studied the onshore migrations of Atlantic cod (Gadus morhua) in the northern Gulf of St. Lawrence to test the predictability of the distributions and catches of a migratory predatory fish relative to physical oceanographic processes and the distributions and abundances of its prey. To survey daily fish distributions and abundances by species, hydroacoustic signal discriminant methods were developed which classified schools of cod, capelin (Mallotus villosus), and mackerel (Scomber scombrus) w...

Reddy, Mageshnee Mayshree.

The scalloped spiny lobster, Panulirus homarus has a subspecies trio that are widely distributed in shallow-water habitats in the South West Indian Ocean. Subspecies are defined by differences in colour and abdominal sculptural pattern. A red variety with the megasculptural carapace pattern, P. h. rubellus is distributed along the south east coast of Africa and Madagascar, where they are endemic. Along the African coast P. h. rubellus stocks traverse political boundaries, Mozambique and Sou...

Lopez, Karem

The Maldives atolls, the very top of one of the largest modern carbonate platforms, occupy the central and largest part of the Chagos-Laccadives ridge located in the equatorial Indian Ocean. In the central part of the archipelago, the large atolls form two parallel north-south relatively continuous chains surrounding an internal basin, the Inner Sea, with water depths not exceeding 550 m. The Maldives carbonate system, uniquely evolved through a combination of global sea level fluctuations, subs...

Li, Changhui

In the first part of this dissertation, radiative interactions with single irregular particles are simulated. We first introduce the basic method and techniques of Finite- Difference Time-Domain method(FDTD), which is a powerful method to numerically solve Maxwell's equations with high accuracy. To improve the efficiency of FDTD, we also develop a parallel FDTD code. Since FDTD can simulate light scattering by arbitrary shape and compositions, we study several radiative interaction cases for sin...

Lamtiur Junita Bancin, Lamtiur Junita Bancin

碩士 / 臺北醫學大學 / 全球衛生暨發展碩士學位學程 / 106

Chauvet, Pauline

La dynamique temporelle des communautés de mégafaune épibenthique associées aux marges continentales demeurent peu connue. Face à ce constat, l’objectif de cette thèse est de mettre en évidence les échelles temporelles, les facteurs environnementaux et les processus qui régissent la dynamique des communautés vivant entre 400 et 1000 m de profondeur sur la pente et dans le Canyon de Barkley (Colombie-Britannique, Canada). Pour répondre à cet objectif, nous avons utilisé les séquences vidéo et les...

Heithoff, Abigail

Thesis (S.M.)--Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Biology; and the Woods Hole Oceanographic Institution), 2011. / Cataloged from PDF version of thesis. "February 2011." / Includes bibliographical references (leaves 44-48). / Trichodesmium, a genus of diazotrophic cyanobacteria, is an important contributor to the marine nitrogen (N) and carbon (C) cycles. The extent to which Trichodesmium dinitrogen (N2) fixation co...

Xu, Zao, Mech. E. Massachusetts Institute of Technology

Thesis (Mech. E.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2011. / Cataloged from PDF version of thesis. / Includes bibliographical references (p. 189-192). / Predicting the ocean surface conditions (surface elevation, temperature, wind speed, etc.) becomes more and more important for both real life and military applications. This thesis presents a direct numerical simulation (DNS) capability of solving complicated natural light field patterns in the ocean-atmosph...

Gao, Yongjun

No description available.

Yu-Chun Lin, 林幼淳

博士 / 國立中央大學 / 水文與海洋科學研究所 / 107 / There are multiple air-sea interactions near the ocean surface that covers from regional to basin scale and from short-term to climate variations, especially over the western North Pacific. The thesis consists of 3 parts: (i) to detect and understand annual Rossby waves and mesoscale eddies in South China Sea; (ii) to analyze and model phytoplankton blooming in tropical cyclone wakes, and (iii) to analyze and model surface waves and their connection with atmosphe...

A comprehensive study was performed to overcome the design issues related to Ocean Current Turbine (OCT) blades. Statistical ocean current models were developed in terms of the probability density function, the vertical profile of mean velocity, and the power spectral density. The models accounted for randomness in ocean currents, tidal effect, and ocean depth. The proposed models gave a good prediction of the velocity variations at the Florida Straits of the Gulf Stream. A novel procedure...

Jackson, Lisa Marie

This study examines the modernist fiction by three transnational women writers who turned to the ocean in their writing during the first half of the twentieth century to navigate their divided or hyphenated national identities. The Anglo-Irish writer Elizabeth Bowen (1899-1973), the Finland-Swedish author Hagar Olsson (1893-1978), and the New Zealand short story writer of English descent, Katherine Mansfield (1888-1923), use ocean space in their fiction, in the form of both sea imagery and mater...

Sun, K., Zhang, J., Gao, Y., Jeng, D., Guo, Yakun, Liang, Z.

Yes / Seabed instability around a pipeline is one of the primary concerns in offshore pipeline projects. To date, most studies focus on investigating the wave/current-induced response within a porous seabed around either a fully buried pipeline or a thoroughly exposed one. In this study, unlike previous investigations, a series of comprehensive laboratory experiments are carried out in a wave flume to investigate the wave-induced pore pressures around a partially embedded pipeline in a trench la...

Li, Lingwei

No description available.

Bhattacharyya, Tania

“Ocean Bombay” is a social history of a colonial city of itinerants. Between 1839 and 1937 the actions of the British Indian colonial state and itinerancy upon one another shaped both the borders of the newly independent nations in 1947 and the changing notions of community and human relationship with space in the South Asian subcontinent. This dissertation charts the story of that development by studying itinerant groups staking their belonging to communities and space in colonial, port Bombay:...

Liu, Huizeng

Accurate retrieval of water-leaving reflectance from satellite-sensed signal is decisive for ocean color applications, because water-leaving radiance only account for less than 10% of satellite-sensed radiance. The standard atmospheric correction algorithm relies on black pixel assumption, which assumes negligible water-radiance reflectance at the near-infrared (NIR) bands. The standard NIR-based algorithm generally works well for waters where the NIR water-leaving radiance is negligible or can ...

Brückner, Marlen

In this thesis spectral solar zenith radiances are analyzed which were obtained from ship-based measurements over the Atlantic ocean. In combination with high-resolution lidar and microwave remote sensing optical and microphysical cloud properties were retrieved using spectral radiation data. To overcome problems of existing transmissivity-based cloud retrievals, a new retrieval algorithm is introduced which circumvents retrieval ambiguities and reduces the influence of measurement uncertainties...

Ana Mafalda Tomás Correia

No description available.

Inês Gomes Pereira

No description available.

Íris Raquel Ferreira Sampaio da Costa

No description available.

State of the art fully three-dimensional ocean models are very computationally expensive and their adjoints are even more resource intensive. However, many features of interest are approximated by the first baroclinic mode over much of the ocean, especially in the lower and mid latitude regions. Based on this dynamical feature, a new type of data assimilation scheme to assimilate sea surface height (SSH) data, a reduced-space adjoint technique, is developed and implemented with a three-dimension...

The parameter optimization problem in oceanography is studied, in which an oceanic model with thermodynamics is used to determine the surface thermal forcing field by the adjoint technique. Two datasets are chosen, the climatological monthly-mean sea surface temperature (SST) and winds. The seasonal variability of the surface heat flux distribution over the tropical Pacific ocean is investigated. / The use of a priori information is investigated in the formulation of the cost function. Experimen...

A spectral Chebyshev-collocation method is devised for the 1-1/2 layer non-linear reduced-gravity equations. Following a general description of spectral methods with their application to meteorological and oceanographic problems the implementation of the numerical technique is described. A bicharacteristic scheme is applied to solve the equations at the boundaries incorporating the boundary conditions. This treatment enables stable time integrations (spectral methods in general are very sensitiv...

A coupled 3D atmosphere-ocean model is developed to study the effect of the oceanic mixed layer depth (OMLD) on the intensification and the motion of the tropical cyclones. We first study the baroclinic response of the ocean with uniform and nonuniform initial OMLD to the steady forcing of an axisymmetric TC moving at a prescribed translating speed. Emphases are placed on the TC-ocean interactions in the coupled model simulations. Results from 96-hour integrations show TC that move into deeper (...

"This paper describes the procedure and results of a surface isotherm analysis of the North Indian Ocean for June 1920, a dry monsoon year, and June 1933, a wet monsoon year. It was found that June sea-surface temperatures were higher during the year of excessive rainfall as compared to a year of deficient rainfall. This positive parallelism is evidence which supports the hypothesis that the amount of rainfall over India during the southwest monsoon depends upon the variation of the surface temp...

Bogdan, Caitlin

Ocean based robotic systems are an opportunity to combine the power of acoustic sensing in the water with sophisticated control schemes. Together these bodies of knowledge could create autonomous systems for mapping acoustic fields and localizing underwater sources. However, existing control schemes have often been designed for land and air robots. This creates challenges for applying these algorithms to complex ocean environments. Acoustic fields are strongly frequency dependent, can rarely be ...

Kasakova, Maria

La propagation des vagues est un phénomène complexe. La simulation directe de ce phénomène à l'aide des équations d'Euler ou de Navier Stokes à surface libre sont complexes et très coûteuses numériquement. Si certains phénomènes aux grandes échelles sont bien décrits par des modèles réduits plus simples à simuler numériquement, des modèles plus avancés sont nécessaires pour décrire des échelles plus fines. La première partie de cette thèse est consacrée aux modèles prenant en compte les effets d...

Strouse, Casey L.

Thesis: Nav. E., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2019 / Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2019 / Cataloged from PDF version of thesis. / Includes bibliographical references (pages 64-65). / Unmanned vehicles (UxVs) are becoming more prevalent across all domains. As UxV technology improves and their operations become more essential to mission success, the challenge of integrating these vehicles o...

Dutton, Daniel J.

Blue marlin Makaira nigricans and white marlin Kajikia albida (formerly Tetrapturus albidus) are overfished in the Atlantic Ocean, with the vast majority of fishing mortality resulting from the pelagic longline fishery that targets tunas (Thunnus spp.) and swordfish Xiphias gladius. Time series of catch-per-unit-effort (CPUE) data have been fundamental to assessments of blue marlin and white marlin stocks, but these time series have been affected by a shift over time in pelagic longline fishing ...

Bullock, Paul Allen

No description available.