Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"air-sea exchange"”.
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Understanding Biogeochemical and Physical Controls on Methane Air-Sea Exchange Fluxes in the Pacific Ocean
… to November 2018. Uncertainty in methane air-sea exchange fluxes was determined using a propagation of errors approach. Fluxes ranged from -0.88 to 4.9 µmol CH<sub>4</sub> m<sup>-2</sup> d<sup>-1</sup>. Average CH<sub>4</sub> flux along the Alaskan margin was 2.2 ± 2.9 µmol CH<sub>4</sub> …
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Water circulation within Tomales Bay, California, U.S.A. : a Mediterranean climate estuary
… (BRIE) project of the "land Margins Ecosystems Research" (LMER) program of the National Science Foundation in the U.S.A. Research on terrigenous inputs, air-sea exchange, sediment-water exchange, ocena-bay exchange and internal cycling in estuaries was conducted. This thesis addresses the …
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Design and Implementation of a Passive Stereo-Infrared Imaging System for the Surface Reconstruction of Water Waves
To quantify air-sea exchange processes, an understanding of how they are influenced by water waves is necessary. This work presents a passive, infrared stereo-imaging system for the reconstruction of a wavy water surface. The system does not require a sub-merged light source, so it is suitable for …
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THE IMPACTS OF ATMOSPHERICALLY DERIVED METALS ON COASTAL MARINE SYSTEMS
… associated with populations of contrasting air mass sources (i.e. Atlantic and UK/European), being greatest in the UK/European air mass sector for Al, Fe, Mn, Cd, Mo and Pb, owing to enhanced source emission rates from continental Europe. Based on the current work, refined budgets for Ni and …
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Characterization of the Carbonate System across the Agulhas and Agulhas Return Currents
… pressure of carbon dioxide) system and the air-sea CO₂ fluxes were computed using 6-hourly wind speeds from the NOAA Blended Sea Winds. An experiment was conducted during the Crossroads scientific monitoring line in May 2013, where surface dissolved inorganic carbon, total alkalinity and CO₂ …
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Sea Spray-Mediated Fluxes at Extreme Wind Speeds
… of intensity forecasts depends heavily on the air-sea interaction scheme. However, at extreme wind speeds the air-sea transition layer becomes replete with sea spray such that there is no longer a well-defined interface. This means that the microphysics of sea spray plays a critical role in …
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Air-sea CO2 cycling in the southeastern Beaufort Sea
… was conducted to examine the couplings between sea ice, ocean, atmosphere, and ecosystem in the southeastern Beaufort Sea. This thesis examines components of the system that control the air–sea exchange of carbon dioxide. Using eddy covariance measurements, we found enhanced CO2 exchange …
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The Biogeochemistry of Hydrogen Sulfide in the Open Ocean
… component of the global sulfur cycle. In seawater, its dissolved species (dissolved sulfide) can react with trace metals to form dissolved complexes and insoluble compounds. Therefore, the study of dissolved° sulfide in the open ocean can yield a better understanding of the biogeochemical …
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Zinc and cadmium in benthic foraminifera as tracers of ocean paleochemistry
… apparent short-term changes in carbon isotopic air-sea signatures. Benthic foraminiferal Zn/Ca could be a sensitive paleoceanographic tracer because deep water masses have characteristic Zn concentrations that increase about ten-fold from the deep North Atlantic to the deep North Pacific. A …
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Zinc and cadmium in benthic foraminifera as tracers of ocean paleochemistry
… apparent short-term changes in carbon isotopic air-sea signatures. Benthic foraminiferal Zn/Ca could be a sensitive paleoceanographic tracer because deep water masses have characteristic Zn concentrations that increase about ten-fold from the deep North Atlantic to the deep North Pacific. A …
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Understanding the CO₂cycle in the North Pacific Ocean using inverse box models
… to errors in the Ekman transports and air-sea exchanges of fresh water. The inverse box model was applied to data generated from the Hamburg LSGOC-biogeochemical model. For this data, the mixing transports of the tracers were important for closing the tracer budgets. Applying the …
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Sea surface temperature trends around Southern Africa (focusing on the Benguela Current system and the Agulhas retroflection area)
Sea surface temperature (SST) fluctuations and changes around southern Africa have important consequences on regional weather, climate and the marine ecosystem. SST is a good indicator for upwelling strength in the Benguela Current system and therefore is linked to bio logical activity in that …
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Uncertainty in atmospheric CO₂ concentrations from a parametric uncertainty analysis of a global ocean carbon cycle model
… inorganic carbon chemistry, climate-dependent air-sea exchange rates, and mixing of dissolved inorganic carbon into the deep ocean that is parameterized by 2-D eddy diffusion. By calibrating the key parameters of this ocean carbon sink model to various "best guess" reference values, it produces …
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Investigating the circulation of Southern Ocean deep water masses over the last 1.5 million years by geochemical fingerprinting of marine sediments
… ferromanganese coatings. Being a proxy for past seawater nutrient contents, $δ^{13}C_{b}$ provides important insights into both past ocean circulation and the potential storage of remineralised organic carbon within the deep ocean, while simultaneously providing information on the past …