The system be down for regular maintenance on April 3rd, 2024 from 8:00-10:00am.
Browsing Oceanography by Title
Now showing items 1-20 of 133
-
A Geophysical Investigation of the Arctic Sea Ice Surface
The oldest records of the Arctic sea ice pack illustrate a frozen, yet dynamic icescape composed of hummocks and weathered ridges draped in thick snow. In recent decades, the effects of climate change have transformed this ... -
A New Instrument and Method for Nitrogen-loss Studies in Oxygen Deficient Zones
The ocean’s biogeochemical cycles are coming under increasing stress due to global climate change and anthropogenic emissions of carbon dioxide. Three different factors are stressing the oceans: rising temperatures, ... -
The Abyssal Ocean's Contributions to the Global Energy and Sea Level Budgets Between the 1990s and 2000s
Over the past three decades, Antarctic Bottom Water (AABW), a cold, dense water-mass produced around Antarctica that feeds the bottom limb of the Meridional Overturning Circulation (MOC), has warmed, freshened, and declined ... -
Acquisition, degradation, and cycling of organic matter within sea-ice brines by bacteria and their viruses
Marine dissolved organic carbon (DOC) is a major component of the global carbon pool, and thus can have significant effects on global carbon cycling. Within the oceans, DOC is largely regulated by microbial communities, ... -
Advection-Diffusion Process Inference via Statistical Oceanographic Methods in the North Atlantic and Southern Oceans
(2011)Quantities pertaining to ventilation, the process by which water is exchanged between the surface mixed layer and the interior of the ocean, are estimated here: To do this, the utility of the thin-plate spline (TPS) as an ... -
Arctic Ocean Circulation Patterns Revealed by Ocean Bottom Pressure Anomalies
(2013-04-17)Over the last few decades, the Arctic Ocean has experienced drastic changes that include increased temperature, changes in freshwater distribution, and decrease in sea ice extent and thickness. These changes, which potentially ... -
Bacterial activity and community structure in the Columbia River estuarine turbidity maxima
(1999)The food web of the Columbia River estuary is centered in estuarine turbidity maxima (ETM) where allochthanous particulate organic material (POM), particle-attached bacteria, and consumers such as copepods and rotifers are ... -
Biological Production Rates in the Southern California Current System
(2013-04-17)The isotopic composition of dissolved O<sub>2</sub> (<super>17</super>∆) and the biological O<sub>2</sub> saturation from O<sub>2</sub>:Ar ratios were measured in the surface ocean during six cruises off the coast of ... -
Biosphere Impacts of Ocean Hypoxia in a Warming Climate
Earth’s climate and biology mediate the availability of dissolved oxygen (O2) in seawater, a key environmental constraint on energy acquisition for diverse marine life. Energy available for organismal growth, activity, and ... -
Characteristics of fin whale vocalizations recorded on instruments in the northeast Pacific Ocean
This thesis focuses on fin whale vocalizations recorded on ocean bottom seismometers (OBSs) in the Northeast Pacific Ocean, using data collected between 2003 and 2013. OBSs are a valuable, and largely untapped resource for ... -
Characterization of organic iron and cobalt ligands in the subtropical North Pacific
Trace metals are essential to the growth of marine organisms, but they exist in very low concentrations in the ocean, and are mostly complexed to diverse suites of organic ligands. While these metal-binding ligands directly ... -
Chemical and Biological Controls on Coral Nucleation
Coral reefs are vibrant and important ecosystems in the oceans, but reefs today are under threat from multiple sources. One such threat is ocean acidification due to anthropogenic climate change, which is reducing both ... -
Circulation-Informed Seafloor Geodetic Techniques for Understanding Plate Boundary Processes
Tectonic plate boundaries host a range of solid-Earth physical processes of scientific and societal interest, including the majority of the world’s volcanism and earthquakes. However, these marginal systems are primarily ... -
Climate-driven shifts in abundance, distribution, and composition of the pelagic fish community in a rapidly changing Pacific Arctic
The Chukchi Sea is experiencing rapid environmental change due to warming temperatures, reductions in sea ice, and increases in transport of warm southern-origin waters into the region. Continued changes in the physical ... -
Coastal sources of estuarine inflow
This dissertation considers the source of water that enters estuaries from the coastal ocean using a series of realistic and idealized ocean models. The first project examines the source of planktonic larvae of the marine ... -
Computational and experimental models of diatom-bacteria interaction
Microbial interactions structure ecosystems and fuel biogeochemical cycling. The metabolic activities operating in the ocean are critical to the entire planet. In this work, I focused on interactions between diatoms and ... -
Connecting sediment dynamics to coastal morphology over linked spatial and temporal scales in Myanmar and New Zealand
Low-lying coastal environments are threatened by sea-level rise (SLR), which is often locally exacerbated by anthropogenic alterations that accelerate subsidence. Managing and protecting these valuable regions requires ... -
Consequences of ocean change for ecological function:Observational and modeling case studies of larval echinoderms
(2013-02-25)Planktonic larvae of many marine invertebrates play important roles in connecting and sustaining disjunct adult populations. Most larvae are denser than seawater and rely on swimming to regulate their vertical positions. ... -
Constructing a Toolbox of Geochemical Indicators of Community Composition Shifts in Coral Reef Ecosystems Under Stress
Modern coral reef ecosystems house 25% of the planet’s entire marine biodiversity in ~ 0.1% of the surface area cover of the ocean and provide numerous ecosystem services for human populations. Unfortunately, these marine ... -
Digestion theory and applications to deposit feeders
(1988)A general theory of digestion can be derived from principles of chemical reactor theory, and three ideal reactor models, the batch reactor, plug-flow reactor (PFR), and continuous-flow, stirred-tank reactor (CSTR), are the ...