PARAZO, EGBERT MAGAT, 潘蘿左

碩士 / 銘傳大學 / 國際事務碩士學位學程 / 106 / This study investigates the changing development of the Philippines Strategic Policy on the South China Sea Issue. The causes of the drastic turn in Philippine foreign policy will be examined by assessing the extent to which personal, internal or external factors, such as Duterte’s personal perceptions, domestic characteristics and pressure, or the shift in global power, contribute as decisive influences in the process. The research examines the Duterte administrat...

Bárbara Bilreiro de Mendóça Frazão e Teixeira

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Bruno Miguel dos Santos Silva Pinto

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Nicole Martins Pires

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Durkin, Alanna G.

Biology / Ph.D. / Chemosynthetic ecosystems are habitats whose food webs rely on chemosynthesis, a process by which bacteria fix carbon using energy from chemicals, rather than sunlight-driven photosynthesis for primary production, and they are found all over the world on the ocean floor. Although these deep-sea habitats are remote, they are increasingly being impacted by human activities such as oil and gas exploration and the imminent threat of deep-sea mining. My dissertation examines deep-se...

Perry, John H

No description available.

Gomez, Carlos E

Biology / Ph.D. / Deep-water or cold-water corals are abundant and highly diverse, greatly increase habitat heterogeneity and species richness, thereby forming one of the most significant ecosystems in the deep sea. Despite this remote location, they are not removed from the different anthropogenic disturbances that commonly impact their shallow-water counterparts. The global decrease in seawater pH due to increases in atmospheric CO2 are changing the chemical properties of the seawater, decreas...

International Ocean Discovery Program (IODP) Expedition 355 drilled two sites (U1456 and U1457) in Laxmi Basin, located in the eastern Arabian Sea. The primary objective of Expedition 355 is to better understand the impact that the Indian (southwest) summer monsoon has on weathering and erosion of the Himalayas and how this in turn affects mountain building. Laxmi Basin is located within the Indus Fan, the second largest submarine fan in the world that has primarily been ...

LLocal climate influences sea turtle hatching and emergence success with climatic extremes affecting embryonic development and hatchling emergence. Thus, it is crucial to understand how different climatic variables affect hatchling output presently and explore how potential climate change may impact future hatchling output and population stability. This thesis examines the influences of six climatic variables (air and sea surface temperature, precipitation, humidity, wind speed, and solar radiat...

Our knowledge of the reproductive dynamics of many economically important marine fish species is remarkably poor. This limits our ability to assess and manage the effects of exploitation on their reproductive potential. The Gulf Black Sea Bass Centropristis striata melana is a temperate serranid that contributes to both recreational and commercial fisheries in the state of Florida, however, the reproductive dynamics of this species is not well understood. To fill this gap, I conducted a fisherie...

The land/sea warming contrast being greater than unity is a well-known phenomenon in response to anthropogenic radiative forcing. The land/sea surface warming asymmetry is essentially a result of the differing surface and boundary layer properties over the land and ocean as well as the differing cloud feedbacks. In this study, we analyze the surface temperature response over the land and ocean, using the NCAR CCSM4, to a transient 1% yr-1 CO2 increase at the time of the doubling. The contributio...

The high frequency of cyclogenesis in the northwestern Gulf of Mexico is often attributed to warm sea surface temperature. In this thesis, the importance of surface fluxes were documented to understand the air-sea interaction effect on the cyclogenesis and storm intensification by using a coupled ocean-atmosphere model of the extratropical 1993 SuperStorm (12-14 March 1993). This storm, also known as the "Storm of the Century," had a wide-reaching effect on the Northern Gulf of Mexico region and...

The effects of mesoscale (50-1000km) sea surface temperature (SST) variability on tropical cyclones (TCs) are investigated with model simulations of an idealized TC as well as simulations of Hurricane Igor (2010) using the Weather Research and Forecasting (WRF) model. Mesoscale SST gradients significantly modify the surface wind speed and direction leading to areas of enhanced divergence/convergence and curl along the gradient. This paper explores the effects that these interac...

A positive correlation between sea surface temperature (SST) and wind stress perturbation near strong SST gradients (ΔSST) has been observed in different parts of the world ocean, such as the Gulf Stream in the North Atlantic and the Kuroshio Extension east of Japan. These changes in winds and SSTs can modify near–surface stability, surface stress, and latent and sensible heat fluxes. In general, these small scale processes are poorly modeled in Numerical Weather Prediction (NWP) and climate mod...

abstract: A critical problem for airborne, ship board, and land based radars operating in maritime or littoral environments is the detection, identification and tracking of targets against backscattering caused by the roughness of the sea surface. Statistical models, such as the compound K-distribution (CKD), were shown to accurately describe two separate structures of the sea clutter intensity fluctuations. The first structure is the texture that is associated with long sea waves and exhibits ...

Spence, David C.

Master of Science

Horton, Michael Scott

Master of Science

Spanghero, Sara

No description available.

Farfan, Gabriela A.(Gabriela Aylin)

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. / The architecture of coral reef ecosystems is composed of coral skeletons built from the mineral aragonite (CaCO3). Coral reefs are currently being threatened by ocean acidification (OA)...

Charoenpong, Chawalit(Chawalit Net)

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. / Nitrogen (N) species in hydrothermal vent fluids serve as both a nutrient and energy source for the chemosynthetic ecosystems surrounding deep-sea vents. While numerous pathways have be...

Eden, Bethany Rose

Recent evidence suggests that mesoscale eddies are an important mechanism for supplying nutrients to the surface waters of oligotrophic gyres. However, little is known about the biological response to these physical perturbations. Because mesozooplankton play a key role in food-web interactions and the flux of carbon and other elements from surface waters, changes in mesozooplankton community structure can affect biogeochemical cycling. During the summers of 2004 and 2005, respectively, we follo...

Rudders, David B.

No description available.

Ivory, Jami Alora

Temporal changes in mesozooplankton community structure are influenced by a combination of environmental factors. Epipelagic mesozooplankton biomass in the Sargasso Sea has increased over the last two decades, with a related increase in zooplankton-mediated carbon export. Unknown, however, are the patterns and variability at different temporal scales (diel, seasonal, and interannual) in abundance of each major zooplankton taxon, and how these patterns relate to physical and other environmental c...

Jones, Randolph M.

Relative to the rest of the Southern Ocean, the Ross Sea continental shelf experiences very high productivity and phytoplankton biomass, which supports an extensive food web including high concentrations of upper trophic level biomass. Conventional observational methods, including ship-based sampling, instrumented moorings, satellite imagery, and computer-based modelling, have illustrated the seasonal progression of the phytoplankton bloom over the past four decades. While we have been sampling ...

Liu, Jing-pu

The North Yellow Sea (NYS) and South Yellow Sea (SYS), stretching from the Bohai Sea in the north to the East China Sea (ECS) in the south, represents an end member of modern epicontinental seas. Because of its shallow depths, the Yellow Sea was entirely exposed subaerially during the last glacial maximum. The new post-glacial sea-level curve derived from an extensive local dataset shows a series of rapid flooding events (12--45 mm/y), separated by a series of slow rises (2--6 mm/y). By about 15...

Mitchell, Molly

Tidal marshes are a major ecological resource in Virginia and a driver of many estuarine functions. Therefore, the long term sustainability of tidal marsh ecosystems is a question of great interest in the research community. Sea level is rising at an unusually high rate in the Chesapeake Bay relative to most of the Atlantic coastline, putting Bay marshes at high risk from drowning and erosion. Sea level rise-driven salinity changes communities and alters ecosystem services. Understanding the ...

Rapoport, Shana

No description available.

Salerno, Jennifer L.

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Jayne, Emily A.

No description available.

Milleville, Kelli A.

No description available.

Morgan, Jessica A.

No description available.

Van Hilst, Christina Marie

No description available.

Bartol, Soraya M.

No description available.

Bellmund, Sarah A.

No description available.

Garfield, Richard Leo

No description available.

Rackley, David Holland

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Mercer, Linda P.

No description available.

Markle, Douglas F.

No description available.

Laird, Chae E.

The effects of chlorinated sea water on the blue crab, Callinectes sapidus Rathbun, were evaluated through measurements of acute toxicity, serum constituents (protein, total ninhydrin positive substances, chloride, osmotic, sodium, potassium, calcium, and magnesium concentrations), oxygen consumption and ventilation rates in whole crabs, and oxygen consumption of excised gills. Histological examination of gills was also performed. The 96-hr LC50 for female blue crabs exposed to chlorinated sea w...

Gallo, Lino J.

Atmospheric input of polycyclic aromatic hydrocarbons (PAH) to water was studied and the effects of sea surface microlayer (SSM) determined. The York River system and the Perrin River areas were monitored with a drum skimmer and a high volume air sampler. Experiments were conducted in the laboratory under controlled conditions. The SSM extracted vapor phase PAH of low molecular weight from the air, and there, aromatic compounds went from dissolved into particulate phase very rapidly. Water cover...

Carter, H. Jacque.

The hypothesis is advanced that ophidiid fishes prevalent beneath oligotrophic tropical seas have evolved trophic specializations appropriate for existence in regions of low primary productivity where ultimate energy available for food production in benthic communities is low. The feeding strategies of these tropical dwelling deep-sea fishes are discussed within the context of this hypothesis. The feeding strategies of tropical dwelling deep-sea ophidiid fishes are examined through an analysis o...

Byles, Richard Allan

Immature foraging sea turtles occupy Chesapeake Bay, Virginia annually from May through November. Telemetry was used to monitor the movements and behavior of loggerhead, Caretta caretta, and Kemp's ridley, Lepidochelys kempi, turtles during 1981-1985. Both species utilized the estuary for summer foraging, but exhibited habitat-preference and behavioral differences that amounted to resource partitioning between the species. Loggerheads oriented towards major river outflows and tended to move alon...

Henrique Luís dos Santos Pinto

No description available.

acase@tulane.edu

"The main objective of this study is to examine the influence of global SSTAs [sea surface temperature anomalies] on rainfall over eastern Africa (Fig. 1) using Florida State University T21 Global Spectral Model (FSUT21GSM) during the southern hemisphere summer of 1982 (wet year) and 1983 (dry year) (Fig. 2)"--Leaf 3. / Typescript. / "Summer Semester, 1991." / "Submitted to the Department of Meteorology in partial fulfillment of the requirements for the degree of Master of Science." / Advisor: T...

The promoter of the developmentally regulated sea urchin L. variegatus U1 small nuclear RNA gene has been studied using in vitro protein binding assays. This U1 gene is active in early embryogenesis but is turned off by the gastrula stage. The promoter of this gene shares four regions of homology with the early U1 promoter of the sea urchin S. purpuratus. The L. variegatus gene can be expressed after microinjection into S. purpuratus embryos, so these four regions were investigated as possible p...

In the sea urchin there is a tandemly repeated U2 snRNA gene set that is expressed early in embryogenesis and inactivated after blastula stage. In addition, there is a constitutive gene set which is expressed in all cells. A tandemly repeated and a single copy U2 snRNA gene were isolated from the sea urchin L. variegatus. Upon microinjection into sea urchin zygotes, the genes showed temporal expression characteristic of an embryonic and a constitutive gene, respectively. Four cis-acting elements...

A method for determining the diurnal sea surface temperature (SST) cycle through satellite data has previously been developed by Clayson and Curry (1996). In their work they applied a parameterized equation from Webster et al. (1996) that uses the magnitude of peak solar insolation, the cumulative amount of daily precipitation, and average daily wind speed to compute the diurnal warming of SSTs. This parameterization has been applied to data obtained by the International Satellite Cloud Climatol...

One way to slow down global warming is to reduce the amount of carbon dioxide released into the atmosphere by capturing carbon dioxide from point sources (e.g., power plants) and storing it out of contact with the atmosphere. One storage site that is being considered is the deep-sea floor. Below ~2600 m, carbon dioxide is a liquid and is denser than seawater, so carbon dioxide poured into a depression would create a carbon dioxide lake. The environmental consequences of this disposal option are ...

A diurnal warming model is used create a new data set of global, diurnally varying sea surface temperatures over a five year period from 2000 to 2004. The model is forced with atmospheric bulk variables, precipitation rate, and radiation fluxes from NASA's MERRA reanalysis whereas bulk SST is approximated by the Reynolds OI AVHRR-only SST dataset. The model simulates the diurnal warming magnitude (dSST) and sensible heat flux and latent heat flux computed with and without a diurnally varying ski...