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 17 of 17 for “"Shelf seas"”.
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Environmental drivers and advective transport of harmful phytoplankton in North West European shelf seas
… and key hydrodynamic features such as the shelf edge;<br/>2) Determine the role of advection in bloom transport and development;<br/>3) Utilise computational modelling to study environmental drivers and advection of<br/>HABs.<br/>To achieve these aims, field data was collected from two …
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The seasonal cycling and physico-chemical speciation of iron on the Celtic and Hebridean shelf seas
Shelf seas represent an important source of iron (Fe) to the open ocean. Additionally, shelf seas are highly productive environments which contribute to atmospheric carbon dioxide drawdown and support large fisheries. The work presented in this thesis describes the seasonal cycle of Fe in the …
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Sea surface distribution of nitrous oxide and methane in European shelf seas and the Atlantic Ocean
… (ICOS, Los Gatos) during the D366 (NW European shelf seas, June/ July, 2011) and Atlantic Meridional Transect 22 (Atlantic Ocean, October/November, 2012) cruises. Interpretation of the N2O and CH4 datasets revealed that shelf seas produced a greater atmospheric source of N2O and CH4 than the …
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Utilising Chlorophyll Fluorescence to Assess the Variability of Phytoplankton Biomass and Productivity in the North-West European Shelf Seas
… in phytoplankton stocks and rates in temperate shelf seas, in part, by providing a better understanding of the strengths and limitations of the use of fluorescence-based measurements.
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Nitrogen uptake and phytoplankton productivity in the changing Barents Sea
… spring, and summer 2018, in the context of the seasonal transition<br/>in sea ice coverage and upper ocean dynamics. These results will contribute to our<br/>understanding of how these processes may respond to ongoing changes in the physical<br/>environment as climate change proceeds. The …
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Carbon Dynamics in Northern Marginal Seas
The marginal seas have, despite their relatively small area, an important role in the global carboncycle. They are largely influenced by carbon and nutrient fluxes from land and a large part of the biological production occurs in the marginal seas. The carbon dynamic in two shelf areas – The Baltic …
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Neural networks applied to ocean colour remote sensing for environmental monitoring
… develop a better algorithm, a northwest European shelf seas matchup dataset is built by collecting in situ chlorophyll a and MODIS Aqua sensor data. Different neural network algorithms are developed to make the best possible estimates of chlorophyll a, using either the bottom of atmosphere …
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Steady models of Arctic shelf-basin exchange
… and global circulation of waters from the Arctic shelf seas. In this study, steady-state exchanges between the Arctic shelves and the central basins are estimated using an inverse box model. The model accounts for data uncertainty in the estimates, and quantifies the solution uncertainty. Other …
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Water Quality Study and Plume Behavior Modeling for Lake Pontchartrain at the Mouth of the Tchefuncte River
… Hydrodynamical-Ecological Model for Regional and Shelf Seas – COHERENS) and the TECPLOT™ equation feature were used for the prediction of contaminant plumes from the Tchefuncte River into the Lake Pontchartrain. The field data were used to validate the model. The upper limits predicted by the …
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Physical control of the distributions of a key Arctic copepod in the northeast Chukchi Sea
… most important zooplankton taxa in the Arctic shelf seas where it serves as a key grazer, predator, and food source. Its summer distribution and abundance have direct effects on much of the food web, from blooming phytoplankton to migrating bowhead whales. The Chukchi Sea represents a highly …
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Interpreting optical signals in shelf sea environments
… significant constituent (OSCs) concentrations in shelf seas can be used as sensitive indicators of ecosystem status and function. Measuring OSC concentrations is labour intensive and a method to improve data analysis would greatly enhance our ability to monitor shelf sea environments. One option …
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Fingerprints and Drivers of Recent Changes in Oceanic Oxygen: From Regional to Global Scales
… global estimates, suggesting that stratified shelf seas could be especially sensitive to warming-driven deoxygenation. However, the detectability of secular changes is reduced by model error and internal variability associated with historical transitions between hydrodynamic regimes.
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Physical control of the distributions of a key Arctic copepod in the Northeast Chukchi Sea
… most important zooplankton taxa in the Arctic shelf seas where it serves as a key grazer, predator, and food source. Its summer distribution and abundance has direct effects on much of the food web, from blooming phytoplankton to migrating bowhead whales. The Chukchi Sea represents a highly …
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The photophysiology and primary productivity of phytoplankton within the deep chlorophyll maximum
In temperate shelf seas, a deep chlorophyll maximum (DCM) persists within the thermocline during summer stratification. This study explores the significance of primary production (PP) within the DCM and provides a detailed investigation into the mechanisms of phytoplankton adaptation to this …
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HYDROGRAPHIC OBSERVATIONS OF OXYGEN AND RELATED PHYSICAL VARIABLES IN THE NORTH SEA AND WESTERN ROSSSEA POLYNYA investigations using seagliders, historical observations and numerical modelling
Shelf seas are one of the most ecologically and economically important ecosystems of the planet. Dissolved oxygen in particular is of critical importance to maintaining a healthy and stable biological community. This work investigates the physical, chemical and biological drivers of summer oxygen …
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Ocean-surface heterogeneity mapping: exploiting hypertemporal datasets in support of seascape ecology research
Seascape ecology provides us with a framework to explore the distribution of marine life throughout the world’s oceans. Studies often require both biological and environmental data from a variety of sources, which are increasingly complemented by data acquired using remote sensing and …