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Articles 91 - 120 of 308
Full-Text Articles in Oceanography and Atmospheric Sciences and Meteorology
Summer 2011, Nova Southeastern University
Spring 2011, Nsu Oceanographic Center
Autonomous Underwater Vehicles As Tools For Deep-Submergence Archaeology, Christopher N. Roman, Ian Roderick Mather
Autonomous Underwater Vehicles As Tools For Deep-Submergence Archaeology, Christopher N. Roman, Ian Roderick Mather
Graduate School of Oceanography Faculty Publications
Marine archaeology beyond the capabilities of scuba divers is a technologically enabled field. The tool suite includes ship-based systems such as towed side-scan sonars and remotely operated vehicles, and more recently free-swimming autonomous underwater vehicles (AUVs). Each of these platforms has various imaging and mapping capabilities appropriate for specific scales and tasks. Broadly speaking, AUVs are becoming effective tools for locating, identifying, and surveying archaeological sites. This paper discusses the role of AUVs in this suite of tools, outlines some specific design criteria necessary to maximize their utility in the field, and presents directions for future developments. Results are presented …
Circulation, Vol. 16, No. 2, Center For Coastal Physical Oceanography, Old Dominion University, Eileen E. Hofmann, John M. Klinck, Mike S. Dinniman
Circulation, Vol. 16, No. 2, Center For Coastal Physical Oceanography, Old Dominion University, Eileen E. Hofmann, John M. Klinck, Mike S. Dinniman
CCPO Circulation
Summer 2010 issue of CCPO Circulation featuring article "CCPO Researchers Focus on the Ross Sea" by Eileen E. Hofmann, John M. Klinck, and Mike Dinniman
Application Of Structured Light Imaging For High Resolution Mapping Of Underwater Archaeological Sites, Chris Roman, Gabrielle Inglis, James Rutter
Application Of Structured Light Imaging For High Resolution Mapping Of Underwater Archaeological Sites, Chris Roman, Gabrielle Inglis, James Rutter
Graduate School of Oceanography Faculty Publications
This paper presents results from recent work using structured light laser profile imaging to create high resolution bathymetric maps of underwater archaeological sites. Documenting the texture and structure of submerged sites is a difficult task and many applicable acoustic and photographic mapping techniques have recently emerged. This effort was completed to evaluate laser profile imaging in comparison to stereo imaging and high frequency multibeam mapping. A ROV mounted camera and inclined 532 nm sheet laser were used to create profiles of the bottom that were then merged into maps using platform navigation data. These initial results show very promising resolution …
Quikscat Analysis Of Hurricane Force Extratropical Cyclones In The Pacific Ocean, Peter Jzyk
Quikscat Analysis Of Hurricane Force Extratropical Cyclones In The Pacific Ocean, Peter Jzyk
Senior Honors Projects
Since June 1999, NASA’s Quick Scatterometer Spacecraft (QuikSCAT) has been providing forecasters at the Ocean Prediction Center (OPC) with Near-Real-Time (N.R.T.) surface wind speed and direction data over the world’s oceans. QuikSCAT has allowed forecasters to better predict potential hazards such as storm surges and issue warnings when necessary. Over the past decade, QuikSCAT has received a number of upgrades which improved the forecasters’ abilities to predict the weather more accurately and issue warnings, accordingly. Improvements included the availability of the QuikSCAT data within the forecasters’ workstations starting in October 2001, the introduction of higher resolution satellite data in May …
Citrate Synthase And The Visual Interactions Hypothesis, Kristina Camarena
Citrate Synthase And The Visual Interactions Hypothesis, Kristina Camarena
Senior Honors Projects
It has been shown that the metabolic rates of deep-living species of particular pelagic groups are significantly lower than those that live closer to the surface in the water column. Various theories as to why have been presented, including the visual interactions hypothesis, which states that because there is a greatly minimized ability to visually interact in the light-limited deep, predators have a reduced need for high metabolic rates because they do not actively go after their prey. Citrate synthase is a mitochondrial enzyme found at the beginning of the citric acid cycle, which plays an integral role in cellular …
Fall 2010, Nsu Oceanographic Center
Operation And Application Of A Regional High-Frequency Radar Network In The Mid-Atlantic Bight, Hugh Roarty, Scott Glenn, Josh Kohut, Donglai Gong, Ethan Handel, Erick Rivera, Teresa Garner, Larry Atkinson, Wendell Brown, Chris Jakubiak, Mike Muglia, Sara Haines, Harvey Seim
Operation And Application Of A Regional High-Frequency Radar Network In The Mid-Atlantic Bight, Hugh Roarty, Scott Glenn, Josh Kohut, Donglai Gong, Ethan Handel, Erick Rivera, Teresa Garner, Larry Atkinson, Wendell Brown, Chris Jakubiak, Mike Muglia, Sara Haines, Harvey Seim
CCPO Publications
The Mid-Atlantic Regional Coastal Ocean Observing System (MARCOOS) High- Frequency Radar Network, which comprises 13 long-range sites, 2 medium-range sites, and 12 standard-range sites, is operated as part of the Integrated Ocean Observing System. This regional implementation of the network has been operational for 2 years and has matured to the point where the radars provide consistent coverage from Cape Cod to Cape Hatteras. A concerted effort was made in the MARCOOS project to increase the resiliency of the radar stations from the elements, power issues, and other issues that can disable the hardware of the system. The quality control …
Winter 2010, Nsu Oceanographic Center
Terrain Constrained Stereo Correspondence, Gabrielle Inglis, Chris Roman
Terrain Constrained Stereo Correspondence, Gabrielle Inglis, Chris Roman
Graduate School of Oceanography Faculty Publications
There is a persistent need in the oceanographic community for accurate three dimensional reconstructions of seafloor structures. To meet this need underwater mapping techniques have expanded to include the use of stereo vision and high frequency multibeam sonar for mapping scenes 10's to 100's of square meters in size. Both techniques have relative advantages and disadvantages that depend on the task at hand and the desired accuracy. In this paper, we develop a method to constrain the often problematic stereo correspondence search to small sections of the image that correspond to estimated ranges along the epipolar lines calculated from coregistered …
Circulation, Vol. 16, No. 1, Center For Coastal Physical Oceanography, Old Dominion University, Tom Gatski
Circulation, Vol. 16, No. 1, Center For Coastal Physical Oceanography, Old Dominion University, Tom Gatski
CCPO Circulation
Fall 2009 issue of CCPO Circulation featuring article "Simulation and Modeling of Turbulence" by Dr. Tom Gatski
Summer/Fall 2009, Nsu Oceanographic Center
Development Of A New Lagrangian Float For Studying Coastal Marine Ecosystems, Alex Schwithal, Chris Roman
Development Of A New Lagrangian Float For Studying Coastal Marine Ecosystems, Alex Schwithal, Chris Roman
Graduate School of Oceanography Faculty Publications
This paper presents an overview and initial testing results for a shallow water Lagrangian float designed to operate in coastal settings. The presented effort addresses the two main characteristics of the shallow coastal environment that preclude the direct of use of many successfully deep water floats, namely the higher variation of water densities near the coast compared with the open ocean and the highly varied bathymetry. Our idea is to develop a high capacity dynamic auto-ballasting system that is able to compensate for the expected seawater density variation over a broad range of water temperatures and salinities while using measurements …
Spring 2009, Nsu Oceanographic Center
Winter 2009, Nsu Oceanographic Center
Fall 2008, Nsu Oceanographic Center
Deep Sea Underwater Robotic Exploration In The Ice-Covered Arctic Ocean With Auvs, Clayton Kunz, Chris Murphy, Richard Camilli, Hanumant Singh, John Bailey, Ryan M. Eustice, Chris Roman, Michael Jakuba, Claire Willis, Taichi Sato, Ko-Ichi Nakamura, Robert A. Sohn
Deep Sea Underwater Robotic Exploration In The Ice-Covered Arctic Ocean With Auvs, Clayton Kunz, Chris Murphy, Richard Camilli, Hanumant Singh, John Bailey, Ryan M. Eustice, Chris Roman, Michael Jakuba, Claire Willis, Taichi Sato, Ko-Ichi Nakamura, Robert A. Sohn
Graduate School of Oceanography Faculty Publications
The Arctic seafloor remains one of the last unexplored areas on Earth. Exploration of this unique environment using standard remotely operated oceanographic tools has been obstructed by the dense Arctic ice cover. In the summer of 2007 the Arctic Gakkel Vents Expedition (AGAVE) was conducted with the express intention of understanding aspects of the marine biology, chemistry and geology associated with hydrothermal venting on the section of the mid-ocean ridge known as the Gakkel Ridge. Unlike previous research expeditions to the Arctic the focus was on high resolution imaging and sampling of the deep seafloor. To accomplish our goals we …
Summer 2008, Nsu Oceanographic Center
Variable Morphologic Expression Of Volcanic, Tectonic, And Hydrothermal Processes At Six Hydrothermal Vent Fields In The Lau Back-Arc Basin, Vicki Lynn Ferrini, Margaret K. Tivey, Suzanne M. Carbotte, Fernando Martinez, Chris Roman
Variable Morphologic Expression Of Volcanic, Tectonic, And Hydrothermal Processes At Six Hydrothermal Vent Fields In The Lau Back-Arc Basin, Vicki Lynn Ferrini, Margaret K. Tivey, Suzanne M. Carbotte, Fernando Martinez, Chris Roman
Graduate School of Oceanography Faculty Publications
Ultrahigh-resolution bathymetric maps (25 cm grid) are used to quantify the physical dimensions of and spatial relationships between tectonic, volcanic, and hydrothermal features at six hydrothermal vent fields in the Lau back-arc basin. Supplemented with near-bottom photos, and nested within regional DSL-120A side-scan sonar data, these maps provide insight into the nature of hydrothermal systems along the Eastern Lau Spreading Center (ELSC) and Valu Fa Ridge (VFR). Along-axis transitions evident in localized volcanic morphology and tectonic characteristics include a change from broad low-relief volcanic domes (hundreds of meters wide,tall) that are dominated by pillow and lobate lava morphologies and are …
Time Post-Hatch Caloric Value Of Artemia Salina, Jessie M. Sanders
Time Post-Hatch Caloric Value Of Artemia Salina, Jessie M. Sanders
Senior Honors Projects
In aquatic animal collections, such as those in the collection of Mystic Aquarium & Institute for Exploration’s Fish & Invertebrate department, live food is an essential part of the diet of animals that are on display, used in education, and kept in reserve for exhibits. For Mystic Aquarium’s Fish & Invertebrate department, newly hatched Artemia salina, or brine shrimp, are fed to an assortment of fishes and invertebrates, including soft corals and jellyfish. Hatch brine is an important source of fatty acids, which are essential for proper growth and development. Hatch brine starts encapsulated in a cyst form and are …
Circulation, Vol. 15, No. 1, Center For Coastal Physical Oceanography, Old Dominion University, Tal Ezer
Circulation, Vol. 15, No. 1, Center For Coastal Physical Oceanography, Old Dominion University, Tal Ezer
CCPO Circulation
Spring 2008 issue of CCPO Circulation featuring article "Hydrodynamic Numerical Ocean Models Support Environmental Studies and Conservation Efforts: From an Arctic Estuary to a Caribbean Coral Reef" by Dr. Tal Ezer
Spring 2008, Nsu Oceanographic Center
Winter 2008, Nsu Oceanographic Center
Byzantium Beneath The Black Sea, Bridget Buxton, Robert Ballard, Michael Brennan, Dwight Coleman, Katy Croff, Christopher Roman, Dan Davis, Dennis Piechota, Sergiy Voronov
Byzantium Beneath The Black Sea, Bridget Buxton, Robert Ballard, Michael Brennan, Dwight Coleman, Katy Croff, Christopher Roman, Dan Davis, Dennis Piechota, Sergiy Voronov
Graduate School of Oceanography Faculty Publications
This poster reports on the August 2007 Black Sea Expedition of the Institute for Archaeological Oceanography at the University of Rhode Island (IAO) and the Institute for Exploration (IFE), in collaboration with the Department of the Underwater Heritage of Ukraine. This year’s work marks a new phase in a multi-year (2000–2012) archaeological and oceanographic survey of the Black Sea. 2007 fieldwork focuses on two Byzantine shipwrecks. The 10th century C.E. shipwreck Chersonesos A (discovered in 2006) lies at 140 m depth in the suboxic zone off the Crimean peninsula. The ship carried a cargo of one-handled jars of a widely …
Nitrogen Inputs To Rhode Island Coastal Salt Ponds - Too Much Of A Good Thing, Scott W. Nixon, Betty A. Buckley
Nitrogen Inputs To Rhode Island Coastal Salt Ponds - Too Much Of A Good Thing, Scott W. Nixon, Betty A. Buckley
Special Collections (Miscellaneous)
Reviews concerns about increase of nitrogen in Rhode Island salt ponds as a result of human activities.
Summer/Fall 2007, Nsu Oceanographic Center
Spring 2007, Nsu Oceanographic Center
Winter 2007, Nsu Oceanographic Center
Fall 2006, Nsu Oceanographic Center