Haw-Chun Wang, 王顥鈞

碩士 / 國立中央大學 / 地球科學學系 / 107 / The Pre-Stack Diffraction-Stack Depth Migration (PreSDSDM) algorithm was implemented with short-offset Marine Multichannel Seismic (MCS) data, the MGL0908-TST survey, and Long-offset active source land seismic from Transect T4b Line of TAIGER Project. Tomographic velocity models from Kuo-Chen et al. (2012), Huang et al. (2014), and Roma (2018) are also utilized in this study to derive 1D velocity for implementing PreSDSDM. For deep structure imaging with seismic data...

Hao-Yuan Cheng, 鄭皓元

博士 / 國立中央大學 / 水文與海洋科學研究所 / 105 / The content of this thesis is divided into two parts. The first part is the development of S-band radar and the second part is the development of coherent-on-receive radar. The first part: The high spatial resolutions of sea-clutter image sequences from X-band radar offer a means of deriving individual waves and wave field at low-cost. However, the performance of X-band radar is impaired under rainy conditions, which are usually accompanied by the severe weather...

Verin, Gauthier

L’océan Arctique est marqué par une forte saisonnalité qui se manifeste par la présence d’une banquise permanente dont l’extension varie entre 6 et 15 millions de kilomètres carré. Interface plus ou moins perméable, la banquise limite les échanges atmosphère - océan et affecte le budget énergétique global en réfléchissant une part importante du rayonnement incident. Le manteau neigeux qui se forme à sa surface est un élément essentiel notamment parce qu’il contribue fortement aux propriétés opti...

Davis, Andrew D.(Andrew Donaldson)

Thesis: Ph. D. in Computational Science and Engineering, Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2018 / Cataloged from PDF version of thesis. / Includes bibliographical references (pages 255-266). / The polar ice sheets have enormous potential impact on future global mean sea level rise. Recent observations suggest they are losing mass to the ocean at an accelerated rate. Skillful prediction of the ice sheets' future mass loss remains difficult, however...

Eronn, Ingrid

Two days in May 1997 has been studied. During one of the days a sea breeze circulation occured, and the two days were compared in search for effects from the sea breeze on the fluxes in the marine boundary layer. Measurements were made on a tower at the small island Östergarnsholm east of the island Gotland, and by an instrumented aircraft over the sea east and west of Gotland. The direction of the geostrophic wind were about northwest during the time period, but 17 m/s during May 3 and 7 m/s dur...

Ana Isabel Duarte André

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Tin Shine Aung

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Natália Gonçalves da Silva

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Inês Filipa Coelho Ribeiro

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Epeli Manu Loganimoce

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Jidapa Noinart

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Ana Vanessa Basto Regueiras

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Bruna Filipa Vieira Costa

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Rehman, Iskander

La réorientation stratégique des États-Unis vers l’espace indo-pacifique a été accompagnée par un regain d’intérêt pour ce qui est des questions maritimes. A la différence des théâtres principaux de la Guerre Froide, la géographie stratégique et économique de la région est fortement marquée par ses larges océans, ses détroits congestionnes, et ses eaux contestées. En conséquent, les profils nivaux des deux grandes puissances émergentes asiatiques, l’Inde et la Chine, ont attire une quantité non ...

Various analytical techniques have been employed to probe the chemical identity and characteristics of complex Dissolved Organic Matter (DOM) mixtures. With continuing advances in readily available highly developed mass spectrometers, the amount of information generated for analysis is steadily rising. Currently, Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR-MS) at high magnetic field (> 9 Tesla), is the only advanced analytical technique capable of ultrahigh resolution and...

Beatriz Torgal Martins

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Okyere Abayie, S. (Samuel)

Abstract. Due to the increased concern of risks of oil spills in the Arctic marine environment, the search for alternative, a sustainable oil spill response technology has intensified. Especially, development of cost-effective, reusable and environmentally friendly sorbents from renewable resources have gained significant interest. The objective of this thesis was to study bio-based sorbents obtained from nanocellulose materials, i.e. aerogels, and address their oil absorption capacity and perfo...

Schultz, Cristina.

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 189-202). / Over the past several decades, the West Antarctic Peninsula (WAP) has undergone physical and ecological changes at a rapid pace, with warming surface ocean and a sharp d...

Dagres, Ioannis.

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 149-153). / Additive manufacturing (AM) is one of the most promising emerging technologies for advanced mechanical systems. When compared to conventional manufacturing processes, AM offers major advantages in productio...

Magoba, Moses

Philosophiae Doctor - PhD / Investigation of the acoustic impedance variations in the upper shallow marine sandstone reservoirs was extensively studied from 10 selected wells, namely: F-O1, F-O2, E-M4, E-CN1, E-G1, E-W1, F-A10, F-A11, F-A13, and F-L1 in the Bredasdorp Basin, offshore, South Africa. The studied wells were selected randomly across the upper shallow marine interval with the purpose of conducting a regional study to assess the variations in the acoustic impedance across the reservoi...

Spackeen, Jenna Lee

Ocean environments are being impacted by climate warming, elevated carbon dioxide (CO2) levels, and shifting nutrient sources and sinks. It is essential to quantify the sensitivity of microorganisms to these effects of global change because they form the base of the marine food web and are an integral component of nutrient cycling on the planet. their role in photosynthesis, nutrient uptake, and transfer of organic matter into higher trophic levels or to the deep ocean via the biological pump re...

Armstrong, Christen Taylor

Despite an increased global interest in harmful algal bloom (HAB) species and eutrophication, the relationship between nutrient sources and changes in species composition or toxicity remains unclear. Stable isotopes are routinely used to identify and track nitrogen (N) sources to water bodies, as sources can be differentiated based on stable isotope values. While literature is available describing N fractionation by diatoms and coccolithophores, data are greatly lacking regarding isotope fractio...

Johnson, Kelly R.

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Mitchell, Martin Lane

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Fisher, Ellen Odell

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Relles, Noelle J.

The islands of Bonaire and Curacao, Dutch Caribbean, were both mapped along their leeward coasts for dominant coral community and other benthic cover in the early 1980s. This mapping effort offers a unique baseline for comparing changes in the benthic community of the two islands since that time, particularly given the marked differences between the two islands. Bonaire is well-protected and completely surrounded by a marine protected area (MPA), which includes two no-diving marine reserves; add...

Maccubbin, Alexander

Bacterial populations indigenous to surface (1 m) waters of the Middle Atlantic Outer Continental Shelf were sampled at seasonal intervals to determine the abundance and distribution of petroleum-degrading (HC) and "total" heterotrophic (HET) bacteria. Simultaneously, unweathered South Louisiana crude oil (SLCO) was added to aliquots of surface water samples to evaluate rates and patterns of degradation of hydrocarbon. Degradation was studied using selected nutrient and temperature regimes in bo...

Luna i Pérez, Beatriz

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Ojeda Martínez, Celia

This publication has been developed in the framework of the project EMPAFISH (www.um.es/empafish/) (SSP8-006539) supported by the Commission of the European Communities within the Sixth Framework Programme.

Luciana Prazeres Mazur

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VIJAYAN NAIR, ASWATHY

The main objectives of the thesis are to learn about the detection of a hypothetical marine cloud brightening (MCB) field experiment and to assess the benefits and risks of an actual implementation using model simulations. The first aim of the thesis is to assess the detectability of MCB from the natural variability of clouds using satellite data. The analysis uses two approaches, i) an analytical method, assessing the radiative forcing by aerosol-cloud interactions for an idealised perturbation...

Andersen, Björn

An innovative diesel-electric power supply and propulsion system is a highly integrated electric system consisting of power generation, power distribution, and electrical drives. Every component of this system constantly produces operating data, which is read and evaluated by several programmable logic controllers, which in turn produce control signals. This thesis presents a diagnostic system that collects the operating data and control signals from all power supply, propulsion, and control com...

Lagged correlation of dynamic height from the gappy California Cooperative Oceanic Fisheries Investigation (CalCOFI) with monthly San Diego sea level for the period 1949-2001 shows that the dynamic height propagates westward at 4.10 cm/s, about double the speed of the large-scale low frequency Rossby wave (2.2 cm/s). TOPEX/Poseidon/Jason1 along-track sea level height estimates since January 1993, filtered interannually, propagate westward at 4.3 cm/s, verifying that observed westward propagation...

Gallego Albiach, Victor

The conservation status of the species studied in this thesis (European eel and pufferfish) is currently frail, thus the main goal of this research was to develop, improve and apply several techniques and protocols with the aim of increasing the knowledge about their sperm biology, improving their reproductive performance and even helping future breeding in captivity. The reproductive performance of the males is often assessed through the sperm motion parameters analysed by the CAS...

Alfosail, Feras

This work presents a combination of analytical and numerical approaches to gain an insight of the dynamics of marine risers and micro machined resonators. Despite their scale difference, we show that both systems share similarities in terms of initial static deformation, quadratic and cubic nonlinearities, and internal resonances. First, we utilize the state space method to study the eigenvalue problem of vertical riser. An orthonormalization step is introduced to recover the numerical scheme ...

Schwartz, George Harris

The Salem East India Marine Society Museum was one of the most influential collecting institutions in the antebellum United States. From 1799 to 1867, it was considered a model organization in the Union, and visitors were a reflection of American society. Though it continues today as the Peabody Essex Museum, which garners increasing national and international attention, the Society's museum is surprisingly unrecognized, understudied, or missing from contemporary scholarship. This dissertation ...

Sbrocco, Elizabeth Jones

Thesis (Ph.D.)--Boston University / PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you. / Whether a species will flourish or face extinction under a new climate regime is largely determined by its dis...

Biller, Nicole Brooke

Thesis advisor: Jeremy D. Shakun / Arctic permafrost contains a substantial stock of carbon that could be released to the atmosphere as CH4 and CO2 upon thawing, making it a potentially powerful amplifier of future warming. The sensitivity of permafrost to climate change is uncertain, however, and occurs on time scales longer than those captured by the instrumental record. Speleothems – cave precipitates deposited from flowing or dripping water – in currently frozen regions record past episodes...

Abushaheen, Yahya Rhadi

Thesis advisor: John E. Ebel / This research describes a method to carry out quantitative analyses of sub-seabed sediments using high-resolution chirp seismic profiles in order to estimate the properties of subsurface sediments. The method identifies significant sedimentary interfaces, extracts them from the seismic record, and measures the inelastic attenuation coefficients (k) of the sedimentary layers. The k values and their variations with increasing depth of sediments are indicative of the ...

Falaise, Charlotte

Haslea ostrearia est une diatomée cosmopolite pouvant proliférer en milieu naturel et dont les efflorescences sont particulièrement fréquentes dans les claires à huîtres de la côte Atlantique française. Cette diatomée produit la marennine, un pigment bleu-vert hydrosoluble connu pour induire le verdissement des branchies des huîtres, augmentant ainsi leur valeur marchande. La marennine présente des activités allélopathiques, antioxydantes ou encore antibactériennes in vitro et son utilisation en...

Chase, Jack W.

Thesis (Ed.M.)--Boston University

Govender, Kimesha

Climate change is a clear indication that humanity’s innate affiliation with nature has been suppressed, and that our detrimental anthropogenic activities on the earth’s natural resources and systems, have exceeded the earth’s ecological capacity to cope and regenerate. This threatens environmental sustainability, which subsequently has social and economic implications. Environmental conservation is humanity’s aim towards re-affiliating its deep rootedness in nature, in order to ensure a sus...

Bachy, Charles

La diversité des protistes marins planctoniques, après avoir été historiquement étudiée sur des critères morphologiques, est depuis récemment sujette à une intense recherche à l’aide d’approches moléculaires. Notamment, les études basées sur l’amplification directe de marqueurs moléculaires à partir d’ADN environnemental ont révélées une exceptionnelle diversité. L’objectif central de ce travail est d’améliorer notre compréhension sur le lien existant entre la connaissance classique des eucaryot...

Marina Ferreira Mourão Santana

Microplastic pollution (particles < 5mm) is one of the most widespread impacts from modern society. Here, microplastic impacts were investigated through experimental assessments considering different exposure scenarios using mussels and micro-PVC as models. These aimed to investigate mussels\' physiological signs of stress under acute and chronic exposures and microplastics transference, assimilation and retention along food chains. In acute exposures, PVC intake affected mussels\' physiology ov...

Hallgren, Axel

The large marine protected area (MPA) declared in 2010 around the Chagos Archipelago, also known as the British Indian Ocean Territory (BIOT), has led to a conflict in the thick of environmental protection, colonialism, sovereignty claims, and the human rights dispute of the Chagossian people that once were exiled from the islands in the 1970s. By applying a Foucauldian inspired critical discourse analysis, this study interprets and examines how the nature/human relationship was portrayed during...

Barton, Karen Samantha

This study investigates the social construction of race, marine space, and resource conflict in one U.S. Native American community: the Makah Reservation, Neah Bay, Washington. A combination of archival records, news media coverage, and semistructured interviews is employed in order to expose the historic roots of the Makah Tribe's recent movement to reclaim control over traditional marine spaces. In particular, this research focuses on the gray whale controversy period between 1995-2000, when, ...

Nuzzo, Andrea <1987>

Marine sediments are the main accumulation reservoir of organic recalcitrant pollutants such as polychlorinated biphenyls (PCBs). In the anoxic conditions typical of these sediments, anaerobic bacteria of the phylum Chloroflexi are able to attack these compounds in a process called microbial reductive dechlorination. Such activity and members of this phylum were detected in PCB-impacted sediments of the Venice Lagoon. The aim of this work was to investigate microbial reductive dechlorination an...

Tuagben,Darlington Saykay

Includes bibliographical references. / The West African coastline has become a "hotspot" for oil production, and 17 oil exploration blocks have been designated off the Liberian coast. Liberia's 579 km coastal zone supports almost 60% of the country's human population and is endowed with natural resources of both biological and socioeconomic significance, leading to the potential for conflict between oil production, existing human activities and biodiversity. The aim of this study was to estab...

Valtierra, Robert Daniel

Thesis (Ph.D.)--Boston University / Passive acoustic localization has benefited from many major developments and has become an increasingly important focus point in marine mammal research. Several challenges still remain. This work seeks to address several of these challenges such as tracking the calling depths of baleen whales. In this work, data from an array of widely spaced Marine Acoustic Recording Units (MARUs) was used to achieve three dimensional localization by combining the methods Tim...

Trembinski, Richard

Current marine navigation radars are capable of high-resolution imagery of marine ice but are not able to classify the marine ice. Classifying marine ice means identifying the ice as first-year ice, multi-year ice or glacier ice. The latter two ice types are as hard as concrete and capable of damaging even ice hardened vessels such as icebreakers. The Canadian Coast Guard has identified the ability of marine navigation radars to classify marine ice as the single greatest improvement to be mad...