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.
Results
Showing 1 to 20 of 21 for “"Southern North Sea"”.
-
The Quaternary geological evolution of the Belgian Continental Shelf, southern North Sea
… estuarine infilling during the Eemian sea-level rise. After the final phase, shoreface erosion was that severe, that seismic unit U3 was completely levelled with the Top-Paleogene surface, and Eemian remnants are only found in depressions. During the subsequent Weichselian lowstand, a …
-
Sulfate reduction and iron-manganese cycling in intertidal surface sediments of the southern North Sea
Zielsetzung der vorliegenden Dissertation ist die Erfassung der Dynamik der Mangan-, Eisen- und Schwefel-Kreisläufe in unterschiedlichen intertidalen Sedimenten. Saisonale biogeochemische Untersuchungen in Sand-, Misch-, und Schlickwatt-Sedimenten der Nordseeinsel Spiekeroog geben Aufschluss über …
-
A Foraminiferal Biostratigraphy of the Upper Cretaceous of the Southern North Sea Basin (UK Sector).
… Shell (UK) Exploration & Production Ltd in the Southern North Sea Basin. The microfaunas have been utilized in the formulation of a zonal scheme comprising twelve foraminiferal biozones based on 'tops' (highest occurrences) of selected taxa; the taxonomy of the stratigraphically diagnostic forms …
-
THE LITHOSTRATIGRAPHY AND BIOSTRATIGRAPHY (FORAMINIFERA) OF THE EARLY CRETACEOUS OF THE SOUTHERN NORTH SEA BASIN
… on the Early Cretaceous strata of the Southern North Sea Basin (Mesozoic Basin). The small amount of Information that has been published i s the result of the search for hydrocarbons (see Chapter 2) . This thesis attempts to remedy the lack of information by a stratigraphical study of …
-
Methane and nutrient dynamics in a tidal flat area of the Southern North Sea: time-series and budgets
Um die biogeochemische Dynamik von Methan und der Nährstoffe Si(OH)4, PO4, NO2 und NO3 im Watt der Südlichen Nordsee zu untersuchen und zu bilanzieren wurde ein System zur kontinuierlichen Messung dieser Parameter entwickelt und auf einer permanenten Messplattform bei Spiekeroog installiert. Die …
-
Simulating Sea Breeze Type Climatologies: Implications for Wind Energy, Weather Forecasting and Sailing in the Southern North Sea
… is currently undergoing a revolution. In the southern North Sea, renewable energy production targets, set by European governments to counter growing concerns over climate change, have sparked an initiative to rapidly construct a large number of offshore wind farms. To meet the targets, the …
-
Analysis and pattern mapping of organic interfaces by means of seismic geophysical technologies to investigate archaeological palaeolandscapes beneath the Southern North Sea
… of submerged landscapes beneath many metres of sea and buried under modern sands requires an understanding of the terrestrial surface as it may have been prior to the inundation. To do this, environmental evidence is required from contextualised in-situ locations and the best material evidence …
-
The Microbiostratigraphy of the Paiaeocene of the Northwest European Continental Shelf
… of 186 samples taken from 9.offshore Central & Southern North Sea boreholes, 1 onshore "XJK borehole, 2 onshore UK locahties and 2 onshore Danish' localities were processed and analysed for microfauna. A total of 273 individual taxa were identified- the majority to species level. The dommant …
-
Evaluation of spatial and temporal models to assess the bioaccumulation of trace metals in marine invertebrates
… of the benthic communities in the Wadden Sea in the Wadden Sea and the southern North Sea with substantial economic impact. For both species the problem of spatial dependence was addressed on two different scales. In either case the goal of the studies was to quantify the range of spatial …
-
Investigation of wellbore stability in a North Sea field development
… selecting mud density. The motivation for this research was to conduct wellbore stability based on exploration wells as basis for planning new offshore field developments with deviated and horizontal wells. A second objective was to investigate the use of a probabilistic approach to wellbore …
-
Relative sea level, sediment supply and barrier dynamics as driving mechanisms of Holocene coastal change.
… behaviour by investigating the role of relative sea level, sediment supply and barrier dynamics as driving mechanisms of Holocene coastal change. The Suffolk coast, an understudied and vulnerable section of coastline in southeast England, is used as a case study to improve understanding of the …
-
UK fisheries, climate change and North Sea fishes: a long-term perspective
Abstract North Sea demersal fishes and fisheries have changed over the past 100 years. To detect the main factors driving these changes, long-term data are needed. Using historical fisheries data that extend throughout the 20th century, this thesis aims to assess drivers influencing developments in …
-
Cellular viability and the occurence and significance of chlorophyll allomers during phytoplankton turnover.
… allomer measurements were also taken during a research cruise in the central and southern North Sea, where the maximum ratio of allomers to chl-a (0.15) was measured at the Flamborough Front.
-
Estuaries as Sources of Methylated Arsenic to the North Sea
… of the Humber Estuary, Thames Estuary and the southern North Sea. Dissolved inorganic As in the Humber Estuary showed removal in the mouth of the estuary in association with an Fe-rich outfall. Intertidal sediments and suspended particles had elevated inorganic As concentrations in the vicinity …
-
Drowned landscapes of the Belgian Continental Shelf : implications for northwest European landscape evolution and preservation potential for submerged heritage
… expansion and reduction of ice masses across the North Sea Basin has a profound impact on eustatic sea levels and glacio-isostasy across northwest Europe. The complex interaction between eustatic sea level and glacio-isostatic adjustment of the landscape, from the time of ice mass expansion to …
-
Determination of Dissolved Iron Speciation in the North East Atlantic Ocean by Flow Injection Chemiluminescence
… of dissolved Fe(II) species (< 0.2 µm) in seawater. This includes results from two ship-board trials and a study of the effects of model ligands on iron redox speciation measurements in natural waters. The method was also used to determine the distribution of dissolved iron species (< 0.2 …
-
Characterising alluvial architecture using physical models, subsurface data and field analogues
… of the Upper Carboniferous, Lower Ketch Member, Southern North Sea, UK, presents difficulties. Subsurface data from the Tyne Field is subdivided into coarse-grained sandbodies (60%) alternating with siltstone lithofacies (40%). A depositional model is proposed representing an aggrading alluvial …
-
Physical constraints on phytoplankton in estuaries and shallow coastal waters
… population growth and succession. Through seasonal investigations, the aggregation of algal biomass (quantified by chlorophyll a concentration) at differing vertical heights in the water column was realised. On closer examination using microscopic identification, the different vertical …
-
Population variation in the life history traits and thermal responses of Atlantic cod, Gadus morhua L.
… Bay on the Scottish east coast, the Clyde Sea on the Scottish west coast, and from near Lowestoft in the southern North Sea. Concurrently haemoglobin genotype and behaviour were also studied. Spatially significant differences in life history traits and thermal responses were revealed in …
-
Environmental change impacts on shell formation in the muricid Nucella lapillus
… expected to be severely affected by decreasing seawater pH, resulting in shell dissolution and retardations during the formation and repair of shells. Understanding the underlying biological and environmental factors driving species vulnerabilities to habitat alterations is thus crucial to our …
Page 1 of 2