Browsing Oceanography by Title
Now showing items 94-113 of 133
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Reconstructing the oceanic p13sSeuss effect
(1999)This dissertation consists of two components: deriving along-isopycnal advection rates in the North Pacific from chlorofluorocarbon (CFC) distributions and determining 13C/12C changes in the global ocean due to oceanic ... -
Resolving the molecular ecology of marine microbial eukaryotes with metatranscriptomes
The surface waters of the North Pacific ocean host diverse populations of microbial eukaryotes, who collectively mediate the flux of energy and matter in their environment with a significant impact on global biogeochemical ... -
Sea ice and upper ocean variability in the Southern Ocean
This dissertation explores key physical mechanisms that control upper ocean and sea ice variability in the Southern Ocean. The first portion of this work presents an observational analysis of wintertime upper ocean stability ... -
Seas in hot water – marine heatwaves on the move; following the heat.
Over the past decade marine heatwaves (MHWs) have gained increased attention due to their long-lasting impacts on marine ecosystems and the services they provide. These unusual, warm-water events have occurred throughout ... -
Seasonality and forcing factors of the Alaskan Coastal Current in the Bering Strait from July 2011 to July 2012
A relatively narrow (~85km) and shallow (~50m) Bering Strait is the only connection between the Pacific and Arctic oceans. Flow through this strait dominates water properties of the Chukchi Sea, impacts Arctic sea ice and ... -
Sediment dispersal and accumulation in an insular sea: deltas of Puget Sound
(2014-02-24)Small rivers carry several million tons of sediment annually into Puget Sound and the Strait of Juan de Fuca. Once delivered to the marine environment, processes in the water column and on the seabed dictate dispersal, ... -
Sediment dynamics and deposits along the fluvial–marine transition: Tidal river to mangrove coast
Rivers supply the vast majority of sediment that reaches the global ocean. As many rivers approach the sea, they experience tidal influence in the absence of salinity, along a reach known as the tidal river. As a result, ... -
Sediment dynamics in tidal environments spanning a range of fluvial influence
A full understanding of the transport of sediment from terrestrial source to marine sink requires knowledge of dynamics in a multitude of intermediate environments with both fluvial and marine influences. Two of these ... -
Shifting role of chemoautotrophic SUP05 bacteria in nitrogen, sulfur and carbon cycles across oxygen gradients in marine environments
Microbes make up a large percentage of the biomass within marine environments and play a key role in cycling of biogeochemical cycles. Despite this, majority of important species of bacteria and archaea remain poorly ... -
Slope and shelf processes associated with upwelling in the northern California Current system
(2013-02-25)The northern California Current system (CCS) experiences relatively weak upwelling-favorable wind stress during summer months, but high nutrient concentrations and hypoxic conditions occur seasonally. This study examines ... -
Species interactions in a changing ocean: A study of inducible traits to understand community responses
Marine communities are experiencing rapid environmental changes including warming temperatures and ocean acidification (OA). For organisms within these communities, responses to ocean change are shaped by population- and ... -
Stratification at Ocean Fronts
The large-scale changes of temperature and salinity in the ocean are not smooth and continuous, but comprise many smaller, sharper gradients. In regions of strong lateral density contrasts, sharp density fronts can slump, ... -
A study of the survival of Alexandrium cysts in natural sediments and their utility to reconstruct harmful algal blooms in the Pacific Northwest
Harmful algal blooms (HABs) produced by the potentially toxic dinoflagellate genus Alexandrium are a natural phenomenon that have been present in the Pacific Northwest since at least the late 1700s. Alexandrium can produce ... -
Sub-seasonal wind variability and El Niño
(2000)The role of sub-seasonal western and central Pacific surface zonal wind variability in the evolution of El Nino sea surface temperature anomaly (SSTA) is examined. The surface wind structure and atmospheric convection ... -
Surface mixed layer heat and salinity budget in the Central Equatorial Indian Ocean
The oceanic surface mixed layer (ML) heat and salinity budgets in the central equatorial Indian Ocean are estimated using measurements taken from two DYNAMO and two RAMA moorings during September 2011 to January 2012. The ... -
Tannin geochemistry of natural systems: method development and application
(1999)Polyphenolic tannin comprises a significant proportion of the leaves, needles, and barks of vascular plant tissues---all major contributors to terrigenous organic matter cycling in aquatic systems. However, virtually nothing ... -
The balance between prokaryotic autotrophy and heterotrophy in the oceans
Bacteria play in integral role in the marine carbon cycle by mediating crucial transformations of organic and inorganic matter. Within the organic carbon pool, heterotrophic bacteria control the flux of labile and recalcitrant ... -
The biogeochemistry of particulate trace elements and isotopes in the North Atlantic Ocean
The distributions and bioavailability of trace metals and their isotopes are strongly controlled by partitioning between the dissolved phase and suspended and sinking biotic and abiotic particles. This work presents new ... -
The Impact of Freshwater and Phytoplankton on Mixed Layer Heating
Mixed layer heat budgets are governed by a range of horizontal and vertical processes, including net heat flux into the mixed layer. Net heat flux into the mixed layer is determined not only by the values of the heat fluxes ... -
The Impact of Organic Ligand Complexation on the Stabilization and Transport of Dissolved Iron
Iron (Fe) is an essential nutrient for life, but it is only present in low concentrations in the ocean. Dissolved Fe (dFe) is the most biologically labile fraction of Fe in seawater, the majority of which is bound to a ...