Log in

Relevant bibliographies by topics / Ellesmere / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Ellesmere.

Dissertations / Theses on the topic 'Ellesmere'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Ellesmere.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

White, Adrienne. "Glacier Changes across Northern Ellesmere Island." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39102.

Full text

Abstract:

This thesis investigates the causes and patterns of glacier and ice shelf changes across Northern Ellesmere Island, including rapid recent changes to marine-terminating glaciers and the mass balance of the Milne Ice Shelf along Ellesmere Island’s northern coastline. The first part describes the change in the areal extent of 1773 glacier basins across northern Ellesmere Island between ~1999 and ~2015 that were measured from optical satellite imagery. The results show that the regional ice coverage decreased by 1705.3 km2 over the ~16-year period, a loss of ~5.9%. This indicates a marked accel

APA, Harvard, Vancouver, ISO, and other styles

2

Kitto, Stephen G. "The Environmental History of Te Waihora – Lake Ellesmere." Thesis, University of Canterbury. Geological Sciences, 2010. http://hdl.handle.net/10092/5028.

Full text

Abstract:

Te Waihora – Lake Ellesmere is an expansive, shallow, turbid, brackish, hyper-eutrophic, lowland lake located on the east coast of New Zealand’s South Island. The catchment and lake are in a highly modified state, with much of the catchment used for intensive agriculture and the lake’s level artificially controlled by cutting a channel through the barrier separating the lake from the sea. Although it is known that Waihora is highly modified, it is difficult to determine the factors contributing to the current lake state and what constitutes a natural state for this lake. In order to plan manag

APA, Harvard, Vancouver, ISO, and other styles

3

Atkinson, David E. (David Elmer) Carleton University Dissertation Geography. "Spectral reflectance survey on the Fosheim Peninsula, Ellesmere Island, N.W.T." Ottawa, 1992.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

4

Harding, Tommy. "Dispersion aérienne et distribution spatiale des microorganismes dans la cryosphère : biodiversité dans la neige et l'air du Haut-Arctique canadien." Thesis, Université Laval, 2010. http://www.theses.ulaval.ca/2010/27707/27707.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Couture, Nicole J. "Sensitivity of permafrost terrain in a high Arctic polar desert : an evaluation of response to disturbance near Eureka, Ellesmere Island, Nunavut." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31213.

Full text

Abstract:

A first approximation of ground ice volume for the area surrounding Eureka, Nunavut, indicates that it comprises 30.8% of the upper 5.9 m of permafrost. Volume depends on the type of ice examined, ranging from 1.8 to 69.0% in different regions of the study area. Excess ice makes up 17.7% of the total volume of frozen materials in the study area. Melt of ground ice in the past has produced thermokarst features which include ground subsidence of up to 3.2 m, formation of tundra ponds, degradation of ice wedges, thaw slumps greater than 50 m across, gullying, and numerous active layer detachment

APA, Harvard, Vancouver, ISO, and other styles

6

Víquez, Ana M. "Isolation and characterization of alkane monooxygenase (alkB) genotypes from Arctic contaminated soils by culture-independent methods." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=98510.

Full text

Abstract:

Alkane monooxygenases (encoded by the alkB gene) are a group of microbial enzymes that catalyze the first reaction of alkane degradation. Studies to determine the diversity and prevalence of alkB genotypes in the environment have focused on culturable organisms. The goal of this research was to use culture-independent methods (DGGE, clone library) to identify and characterize alkB genes, and to determine their prevalence in Arctic contaminated soils. General alkB PCR degenerate primers (alkB-Mc) were designed using the conserved nucleotide sequences of the Histidine I Box and Histidine III Box

APA, Harvard, Vancouver, ISO, and other styles

7

Lévesque, Esther. "Plant distribution and colonization in extreme polar deserts, Ellesmere Island, Canada." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0021/NQ27680.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Favero, Pauline. "Active layer detachment morphology, sedimentology, and mechanisms, Fosheim Peninsula, Ellesmere Island." Thesis, University of Ottawa (Canada), 2009. http://hdl.handle.net/10393/28180.

Full text

Abstract:

Active layer detachments on the Fosheim Peninsula have been assumed to develop over periods of minutes to a few hours. This assumption played an integral role in the understanding of relationships between active layer detachment deposit morphology, morphometry and sedimentology and active layer detachment dynamics. Field observations of two failures at 'Big Slide Creek' on the Fosheim Peninsula in August 2005 showed that while one failure conformed to the pre-existing assumption of near-instantaneous formation, movement and cessation of movement, the other failure did not and exhibited progres

APA, Harvard, Vancouver, ISO, and other styles

9

Barry, Peter. "Ground ice characteristics in permafrost on the Fosheim Peninsula, Ellesmere Island, N.W.T. : a study utilizing ground probing radar and geomorphological techniques." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=56907.

Full text

Abstract:

This thesis investigates the nature and distribution of ground ice occurrences on the central Fosheim Peninsula, Ellesmere Island, and assesses the potential for thermokarst in light of possible climatic warming.<br>Field observations conducted in 1990 and 1991 involved geomorphological and cryostratigraphic examinations of twenty-eight ground ice sections exposed in retrogressive thaw slumps and ground probing radar surveys of two of the thaw slumps. Samples were taken of ground ice and sediments exposed in thaw slump headwalls for laboratory analysis.<br>Samples were analyzed for moisture co

APA, Harvard, Vancouver, ISO, and other styles

10

Whissell, Gavin. "Merging metagenomic and microarray technologies to explore bacterial catabolic potential of Arctic soils." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=98518.

Full text

Abstract:

A novel approach for screening metagenomic libraries by merging both metagenomic and microarray platforms was developed and optimized. This high-throughput screening strategy termed "metagenomic microarrays" involved the construction of two Arctic soil large-insert libraries and the high density arraying of the clone plasmid DNA (~50 kb) onto glass slides. A standard alkaline lysis technique used for the purification of plasmid DNA was adapted and optimized to function efficiently in a 96-well format, providing an economically viable means of producing sufficient high-quality plasmid DNA for d

APA, Harvard, Vancouver, ISO, and other styles

11

Wood, Hannah. "The benthic ecology and food web dynamics of Te Waihora (Lake Ellesmere)." Thesis, University of Canterbury. School of Biological Sciences, 2008. http://hdl.handle.net/10092/2274.

Full text

Abstract:

Coastal and shallow lakes are often subjected to eutrophication due to nutrients from catchment farming activities. Lake Ellesmere (Te Waihora) is a hyper-eutrophic lake which has gained recent attention because of concerns over its ecological health and fishery status. This study investigated the benthic ecology of the lake by extensive spatial and temporal sampling. Eight littoral sites were sampled on a single occasion, and 20 benthic sites were sampled once per season for one year. Water chemistry conditions, substrate and invertebrate communities varied significantly around the lake. Sali

APA, Harvard, Vancouver, ISO, and other styles

12

Triglav, Katherine. "The under-ice dynamics of High Arctic lakes : the importance of physicochemical interactions with phytoplankton and bacterial communities in Stuckberry Valley, Ellesmere Island." Master's thesis, Université Laval, 2021. http://hdl.handle.net/20.500.11794/70382.

Full text

Abstract:

Même les écosystèmes les plus nord du monde ont été affectés par le réchauffement climatique et les lacs de l'Extrême-Arctique ne font pas exception. L'île d'Ellesmere est à la limite nord du Canada et des changements de régime vers des taxons associés à des saisons de croissance plus longues ont déjà été documentés dans les lacs de cette région. La côte nord de l'île d'Ellesmere est dans une région pour laquelle on prévoit le plus grand réchauffement annuel au cours des 80 prochaines années. Il est donc impératif de comprendre le fonctionnement des lacs côtiers sensibles avant que d'autres ch

APA, Harvard, Vancouver, ISO, and other styles

13

Grom, Jackie. "Retrogressive thaw slump process and morphology, Eureka Sound Lowlands, Ellesmere Island, Nunavut, Canada." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22043.

Full text

Abstract:

Climate change is expected to have a significant impact on arctic regions, most notably in ice-rich permafrost regions. Retrogressive thaw slumps, backwasting resulting from the exposure of ice-rich permafrost, are a prominent thermokarst feature throughout the arctic and are projected to increase in frequency and extent under warming climate scenarios. However, there is limited information on retrogressive thaw slump activity and field observations are complicated by dynamic interactions between morphology and climate. This work attempts to further define these controls to increase underst

APA, Harvard, Vancouver, ISO, and other styles

14

Collins, Karen Elizabeth. "Reconstruction of late quaternary ice-flow directions, east central Ellesmere Island, Northwest Territory." Thesis, University of Ottawa (Canada), 1993. http://hdl.handle.net/10393/6718.

Full text

Abstract:

This study identifies Late Quaternary glacial ice-flow direction in east-central Ellesmere Island, N.W.T., by the study of its composition and its relation to bedrock sources. The spatial distribution of five till types suggests a hypothesis which attempts to reconcile the Innuitian Ice Sheet model of Blake with the Franklin Ice Complex model of England. Glaciers draining from ice sheets in northern Ellesmere Island and Greenland filled Kane Basin and flowed southward toward Smith Sound. When this southward-flowing ice reached the bottleneck at Smith Sound (40 km wide), it overrode the adjacen

APA, Harvard, Vancouver, ISO, and other styles

15

Morin, Jean. "Facies analysis of Lower Permian cyclic carbonates, west-central Ellesmere Island, Canadian Arctic." Thesis, University of Ottawa (Canada), 1992. http://hdl.handle.net/10393/7553.

Full text

Abstract:

At least 36 decametre-scale, largely symmetric high-frequency cycles spanning approximately 15 Ma make up the carbonate-dominated succession of Lower Permian sequence 3 of the Sverdrup Basin in Fosheim and Hamilton peninsulas. These cycles record a rift pulse caracterized by the uplift, passive subsidence, collapse and passive subsidence of the Fosheim-Hamilton subbasin and show that during the rifting phase of the Sverdrup Basin deposition of conformity-bounded sequences was tectonically rather than eustatically controlled. The active rifting-phase of the Sverdrup Basin comprises four unconfo

APA, Harvard, Vancouver, ISO, and other styles

16

Spiegelman, Dan. "Exploring the fusion of metagenomic library and DNA microarray technologies." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=98805.

Full text

Abstract:

We explored the combination of metagenomic library and DNA microarray technologies into a single platform as a novel way to rapidly screen metagenomic libraries for genetic targets. In the "metagenomic microarray" system, metagenomic library clone DNA is printed on a microarray surface, and clones of interest are detected by hybridization to single-gene probes. This study represents the initial steps in the development of this technology. We constructed two 5,000-clone large-insert metagenomic libraries from two diesel-contaminated Arctic soil samples. We developed and optimized an automated f

APA, Harvard, Vancouver, ISO, and other styles

17

Pouliot, Jérémie. "Biodiversité microbienne des écosystèmes extrêmes : analyse moléculaire de la diversité des Archaea dans deux lacs méromictiques arctiques." Thesis, Université Laval, 2008. http://www.theses.ulaval.ca/2008/25756/25756.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Robertson, Scott M. "Holocene deglacial and sea level history of Dobbin Bay, eastern Ellesmere Island, Arctic Canada." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ40101.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Thériault, Pierre. "Synrift sedimentation in the Upper Carboniferous Canyon Fiord Formation, SW Ellesmere Island, Canadian Arctic." Thesis, University of Ottawa (Canada), 1991. http://hdl.handle.net/10393/7631.

Full text

Abstract:

The Upper Carboniferous Canyon Fiord Formation is genetically related to continental rifting during the early history of Sverdrup Basin. The basal part of the formation, on southwestern Ellesmere Island, has been subdivided into five distinct facies assemblages: (i) a lower sandstone assemblage, deposited in the floodplain environment of high sinuosity streams, and locally in lacustrine and paludal environments; (ii) a conglomerate assemblage, deposited in the alluvial fan to proximal braided stream environment; (iii) an upper sandstone assemblage, deposited in braided stream and coastal plain

APA, Harvard, Vancouver, ISO, and other styles

20

Veillette, Julie. "Stucture et dynamique d'écosystèmes aquatiques côtiers du haut Arctique comme sentinelles de changements environnementaux." Thesis, Université Laval, 2010. http://www.theses.ulaval.ca/2010/27290/27290.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Sherry, Colleen Theresa. "An upper Carboniferous shelf-to-basin transect: Nansen and Hare Fiord Formations, NW Ellesmere Island." Thesis, University of Ottawa (Canada), 1995. http://hdl.handle.net/10393/9814.

Full text

Abstract:

An ancient transition from shallow marine platform to deep basin is preserved in the Upper Carboniferous strata of the Sverdrup Basin on northwestern Ellesmere Island. The shelf break is delineated by an approximately 200 km long discontinuous reef tract extending from Audhild Bay to the head of Hare Fiord within the Nansen Formation. The reef tract is marked by a series of massive, coalesced shelf edge buildups which developed during a major second order regression within the Sverdrup Basin. The shelf edge buildups are largely composed of phylloid alga-rich boundstones with abundant early mar

APA, Harvard, Vancouver, ISO, and other styles

22

Smith, Iain Roderick. "Late Quaternary glacial histories and Holocene paleoenvironmental records from northeast and southwest Ellesmere Island, Nunavut, Canada." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0025/NQ34836.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Hilmo, Maidie. "Images, icons, and texts, illustrated English literary works from the Ruthwell Cross to the Ellesmere Chaucer." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ62517.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Lee, Carmen C. "Geology of the Palaeogene, Ellesmere Island, Arctic Canada : sedimentology and stratigraphy of the Eureka Sound Group." Thesis, University of Reading, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409042.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Riediger, Cynthia Louise. "Sedimentology and tectonic history of the Eureka Sound and Beaufort formations, southern Ellesmere Island, Arctic, Canada." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/24904.

Full text

Abstract:

The Eureka Sound Formation in the eastern Canadian Arctic Archipelago is an Upper Cretaceous to Paleogene pre- and syn-tectonic deposit that records the uplift and segmentation of the Early Carboniferous to Tertiary Sverdrup Basin. Scattered outliers of the Eureka Sound Formation on southern Ellesmere Island rest unconformably on or are faulted against Devonian strata. In the vicinity of Vendom, Stenkul, Baumann and Sor Fiords, the Eureka Sound Formation attains a maximum thickness of 480 m and comprises a sequence of nonmarine and brackish water deposits that ranges in age from mid-Paleocen

APA, Harvard, Vancouver, ISO, and other styles

26

Wilks, Taryn. "Response of benthic invertebrate fauna to fluctuating lake levels and salinity concentrations in Lake Ellesmere/Te Waihora." Thesis, University of Canterbury. Biological Sciences, 2010. http://hdl.handle.net/10092/5008.

Full text

Abstract:

Lake Ellesmere/Te Waihora is one of New Zealand’s largest coastal, brackish water lakes. It has nationally significant wetland bird populations and is regionally important for iwi. The lake regularly experiences fluctuations in water level, resulting in a continually expanding and contracting littoral zone. This study investigated the impacts of these water level changes on the ecology of the lake. Water chemistry results collected over 12 months, confirm the lake is hypertrophic, due to high nutrient (nitrogen and phosphorus) concentrations resulting in high chlorophyll a levels and low water

APA, Harvard, Vancouver, ISO, and other styles

27

Hill, Stewart Adams. "A new member of the zygopteridales from the lower Upper Devonian (Frasnian) of Ellesmere, N.W.T., Arctic Canada." Thesis, Virginia Tech, 1992. http://hdl.handle.net/10919/45029.

Full text

Abstract:

<p>A newly discovered fern-like fossil plant is described from the Lower Upper Devonian of southern Ellesmere. This plant occurs as an element of an Archaeopteris dominated flora preserved in sediments of the Nordstrand Point Formation (mid-late Frasnian) at Bird Fiord. The plant demonstrates a pinnate vegetative system with three orders of branch and laminate pinnules, of a general sphenopteroid type. Primary pinnae usually diverge from the main axis in distichous pairs (Le., in a quadriseriate manner), but rarely depart singly (i.e., in a biseriate manner). Each primary pinna bears an aphleb

APA, Harvard, Vancouver, ISO, and other styles

28

Clarke, Shawne. "An experimental study on the influence of climatic fluctuations on solifluction, Fosheim Peninsula, Ellesmere Island, Northwest Territories." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0032/MQ38739.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Hill, Stewart Adams. "A new member of the zygopteridales from the lower Upper Devonian (Frasnian) of Ellesmere, N.W.T., Artic Canada /." This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-10062009-020228/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Malone, Shawn Joseph. "Tectonic evolution of northern Ellesmere Island: insights from the Pearya Terrane, Ellesmerian Clastic Wedge And Sverdrup Basin." Diss., University of Iowa, 2012. https://ir.uiowa.edu/etd/3496.

Full text

Abstract:

The tectonic evolution of northern Ellesmere Island is dominated by the accretion of the Pearya Terrane and the progressive reworking of materials from the Pearya Terrane and the northern Caledonides. Geochronology from a suite of seven Succession I orthogneiss samples defines a range of earliest Neoproterozoic ages from 962 ± 6 Ma to 974 ± 8 Ma. Geochemistry of both zircon and whole rock samples reveal a complex magmatic history tapping multiple sources. The rocks include both I and S type granitoids, with silica contents ranging from 62% to 73%. Trace element geochemistry reveals LILE enrich

APA, Harvard, Vancouver, ISO, and other styles

31

Clarke, Shawne Arianne. "An experimental study on the influence of climatic fluctuations on solifluction, Fosheim Peninsula, Ellesmere Island, Northwest Territories." Thesis, University of Ottawa (Canada), 1998. http://hdl.handle.net/10393/4538.

Full text

Abstract:

A field experiment, involving direct manipulation of surface microclimate, was undertaken in the continuous permafrost zone to examine the influence of climatic fluctuations on solifluction rates and movements throughout the active layer. Movements and soil temperature were measured continuously from 1993-1997 using five electro-mechanical meters and thermocouple cables on an 8$\sp\circ$ colluvial slope in Hot Weather Creek valley, Ellesmere Island. Natural variation of movement among the years and the meters was measured until summer of 1996 when surface climatic treatments (surface warming,

APA, Harvard, Vancouver, ISO, and other styles

32

Kells, Melanie P. "Sequence stratigraphy and depositional history of the Artinskian to Kungurian sequence, Otto Fiord area, northwestern Ellesmere Island." Thesis, University of Ottawa (Canada), 1996. http://hdl.handle.net/10393/10139.

Full text

Abstract:

The Artinskian to Kungurian Sequence of the Otto Fiord area is dominated by the Great Bear Cape, Raanes and Trappers Cove formations in addition to the upper portions of the Nansen and Hare Fiord formations. The Great Bear Cape Formation (10-300 m), in the Otto Fiord area, is a yellowish-weathering, cliff-forming, packstone to grainstone dominated by echinoderms, bryozoans, and brachiopods. The Raanes Formation (10-225 m) is greenish-weathering, recessive to resistant, shaly to silty, variably cherty wackestone to packstone dominated by bryozoans, brachiopods, crinoids, and sponge spicules in

APA, Harvard, Vancouver, ISO, and other styles

33

Julien, Jean-Rémi. "Écologie alimentaire et dynamique de populations du labbe à longue queue (Stercorarius longicaudus) à Alert, Île d'Ellesmere, Nunavut." Thesis, Université Laval, 2012. http://www.theses.ulaval.ca/2012/28451/28451.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Atkinson, Nigel. "The last glaciation and relative sea level history of central Baumann Fiord, southwest Ellesmere Island, Canadian High Arctic." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ40025.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Caswell, Brandon Christopher. "⁴⁰AR/³⁹AR geochronology of biotite from ductile shear zones of the Ellesmere-Devon crystalline terrane, Nunavut, Canadian Arctic." Thesis, University of Iowa, 2018. https://ir.uiowa.edu/etd/6070.

Full text

Abstract:

This thesis presents a 40Ar/39Ar geochronological analyses of biotite from thin ductile shear zones in Paleoproterozoic granulite-facies gneisses from the Ellesmere-Devon crystalline terrane, Nunavut, Canada. The gneisses are part of the Paleoproterozoic Thelon tectonic zone. U-Pb dates of zircon show that the gneisses have magmatic protolith ages ranging from 2007–1958 Ma. The quartzofeldspathic gneisses in southeast Ellesmere Island display centimeter-scale E- to NE-striking sinistral and dextral mylonite zones offsetting pegmatitic dikes that are the last stage of ductile deformation of the

APA, Harvard, Vancouver, ISO, and other styles

36

Dalton, Abigail. "Iceberg Production and Characteristics at the Termini of Tidewater Glaciers around the Prince of Wales Icefield, Ellesmere Island." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36992.

Full text

Abstract:

Since the 1960s, warming air and sea surface temperatures have led to decreasing sea ice extent and longer periods of open water in the Canadian Arctic Archipelago (CAA). Recent and rapid changes have also been observed in the ice discharge patterns of glaciers in this region. For example, Trinity and Wykeham glaciers on the Prince of Wales Icefield (POW), SE Ellesmere Island, contributed ~62% of total ice discharge to the ocean from the Canadian Arctic Archipelago in 2016, compared to ~22% in 2000. Given these changes, an important question is whether there is a relationship between changing

APA, Harvard, Vancouver, ISO, and other styles

37

Smith, Denis. "Corporate power, risk assessment and the control of major hazards : A study of Canvey Island and Ellesmere Port." Thesis, University of Manchester, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234229.

Full text

Abstract:

This thesis examines the role of corporate power in the decision making and regulatory processes for major hazard sites in the UK. In particular, emphasis is placed on the role of risk analytical techniques and the associated use of technical expertise in the public inquiry process by focusing on two areas, Canvey Island (Essex) and Ellesmere Port (Cheshire), over a twenty year period. Evidence shows that the ability of public groups to intervene effectively in the decision making process varies both .spatially and temporally. In order to set this data within a theoretical framework the analys

APA, Harvard, Vancouver, ISO, and other styles

38

Samad, Shameer Sheik. "An analysis of the impact of sea level rise on Lake Ellesmere - Te Waihora and the L2 drainage network, New Zealand." Thesis, University of Canterbury. Civil Engineering, 2007. http://hdl.handle.net/10092/1186.

Full text

Abstract:

The potential impact of sea level rise on Lake Ellesmere - Te Wiahora and the subsequent effect on the efficiency and performance of the L2 Drainage network was investigated in relation to the operation of the L2 Drainage scheme. Lake Ellesmere is currently manually opened for drainage to the sea when the lake levels reach 1.05 m above mean sea level (asl) in summer and 1.13 m asl in winter. With a rise in sea level, the lake opening levels for both summer and winter would have to increase in order to maintain the current hydraulic gradient. Higher lake levels would impact drainage schemes suc

APA, Harvard, Vancouver, ISO, and other styles

39

Van, Hove Patrick. "Limnologie du Nord de l'Île d'Ellesmere." Doctoral thesis, Université Laval, 2005. http://hdl.handle.net/20.500.11794/19428.

Full text

Abstract:

Les lacs et les fjords du nord de l’Île d’Ellesmere, au Nunavut, renferment des écosystèmes uniques qui dépendent de la glace pour le maintien de leur structure. Certains de ces « cryo-écosystèmes » sont stratifiés en permanence, formés d’une couche d’eau douce flottant sur une couche d’eau de mer. Ces stratifications sont entre autres dues à la limitation du brassage par le vent en raison de la présence d’un couvert de glace permanent. Les travaux présentés ici ont comme objectif principal d’évaluer la diversité limnologique et biologique des lacs côtiers du nord de l’Île d’Ellesmere afin de

APA, Harvard, Vancouver, ISO, and other styles

40

Mortimer, Colleen Adel. "Quantification of Changes for the Milne Ice Shelf, Nunavut, Canada, 1950 - 2009." Thesis, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/19773.

Full text

Abstract:

This study presents a comprehensive overview of the current state of the Milne Ice Shelf and how it has changed over the last 59 years. The 205 ±1 km2 ice shelf experienced a 28% (82 ±0.8 km2) reduction in area between 1950 – 2009, and a 20% (2.5 ±0.9km3 water equivalent (w.e.)) reduction in volume between 1981 – 2008/2009, suggesting a long-term state of negative mass balance. Comparison of mean annual specific mass balances (up to -0.34 m w.e. yr-1) with surface mass balance measurements for the nearby Ward Hunt Ice Shelf suggest that basal melt is a key contributor to total ice shelf thinni

APA, Harvard, Vancouver, ISO, and other styles

41

White, Adrienne. "Dynamics and Historical Changes of the Petersen Ice Shelf and Epishelf Lake, Nunavut, Canada, since 1959." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23574.

Full text

Abstract:

This study presents the first comprehensive assessment of the Petersen Ice Shelf and the Petersen Bay epishelf lake, and examines their current characteristics and changes to their structure between 1959 and 2012. The surface of the Petersen Ice Shelf is characterized by a rolling topography of ridges and troughs, which is balanced by a rolling basal topography, with thicker ice under the surface ridges and thinner ice under the surface troughs. Based on thickness measurements collected in 2011 and area measurements from August 2012, the Petersen Ice Shelf has a surface area of 19.32 km2 and a

APA, Harvard, Vancouver, ISO, and other styles

42

Mitchell, Hannah Laugesen. "A comparative study of riparian drain management and its effects on phosphate and sediment inputs to Te Waihora/Lake Ellesmere." Thesis, University of Canterbury. The Waterways Centre for Freshwater Management, 2012. http://hdl.handle.net/10092/9441.

Full text

Abstract:

Issues affecting water quality are seen as one of the most important and pressing global problems of our era. In New Zealand, water bodies with the poorest water quality and ecological condition tend to be surrounded by pastoral land use. Lake Ellesmere/Te Waihora in Canterbury, New Zealand, is a typical example of the issues that nutrient and sediment run-off from pastoral land can create. The aim of this study was to determine the relationship between sediment concentrations, phosphate concentrations, ecological state and the degree of riparian restoration on drains that flowed into Lake E

APA, Harvard, Vancouver, ISO, and other styles

43

Poey, Jean-Luc. "Stratigraphy and depositional environments of an Upper Ordovician to Lower Devonian shelf-to-basin transition, Svendsen Peninsula, Ellesmere Island, N.W.T." Thesis, University of Ottawa (Canada), 1988. http://hdl.handle.net/10393/5354.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Drinkard, Sally Lyn, and Sally Lyn Drinkard. "Glacio-isostatic rebound rates from in-situ cosmogenic chlorine-36 dating of raised marine beaches in Makinson inlet, eastern Ellesmere island." Thesis, The University of Arizona, 1999. http://hdl.handle.net/10150/626778.

Full text

Abstract:

Ellesmere Island, in the Canadian Arctic, and adjacent sea were covered by ice during the Last Glacial Maximum (LGM, 20-10 ky ago). Postglacial rebound rates, indic ative of ice sheet configuration, glacial and deglacial chronologies, and rheologic proper ties of the underlying mantle, were determined for Makinson Inlet using a new approach based on in-situ accumulation of cosmogenic 36Cl. Surface and subsurface gravel samples were collected from fourteen paleobeaches at elevations between the sea level and the Holocene marine limit at ca. 105 m a.s.l. Apparent 36Cl ages range from

APA, Harvard, Vancouver, ISO, and other styles

45

Kokelj, Steve. "The effect of detachment sliding on surface wash erosion in the continuous permafrost zone, Hot Weather Creek, Fosheim Peninsula, Ellesmere Island, N.W.T." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0003/MQ36709.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

de, Freitas Tim A. "Stratigraphy, mud buildups, and carbonate platform development of the Upper Ordovician to Lower Devonian sequence, Ellesmere, Hans, and Devon Islands, Arctic Canada." Thesis, University of Ottawa (Canada), 1991. http://hdl.handle.net/10393/7937.

Full text

Abstract:

The Upper Ordovician to Lower Devonian platform in the Canadian Arctic twice evolved from a ramp to a rimmed shelf profile. Platform backstepping occurred in the fastigatus, acuminatus, cyphus?, sakmaricus (in North Greenland only) and linearis graptolite zones. Two major phases of pinnacle reef development followed platform backstepping, the first beginning in the lower Llandovery (cyphus Zone) and the second in the Ludlow (linearis Zone). Pinnacles of the first phase are uncommon, occur in the vicinity of Baumann Fiord, and show a vertical succession of lime mudstone, poorly exposed microbia

APA, Harvard, Vancouver, ISO, and other styles

47

Kokelj, Steven V. "The effect of detachment sliding on surface wash erosion in the continuous permafrost zone, Hot Weather Creek, Fosheim Peninsula, Ellesmere Island, Northwest Territories." Thesis, University of Ottawa (Canada), 1998. http://hdl.handle.net/10393/4070.

Full text

Abstract:

An experimental design was developed to evaluate the effect of active-layer detachment sliding on surface wash erosion. Specifically, the aim was to examine to what extent the disturbance of vegetation cover, changes in hydrological conditions due to topographic modification by detachment sliding and the formation of a fresh active layer affect rates of surface wash erosion. Detachment slides generally accumulated more snow than adjacent slopes and yielded greater amounts of surface runoff than vegetated slopes with similar snow covers. Surface drainage was inhibited on well-vegetated hummocky

APA, Harvard, Vancouver, ISO, and other styles

48

Woods, Kirstin Roseanne G. "Rangatiratanga in the context of Lake Ellesmere/Te Waihora : identifying the conditions necessary for the exercise and expression of tribal authority over tribal resources." Thesis, University of Canterbury. Department of Resource Management, 1989. http://hdl.handle.net/10092/2512.

Full text

Abstract:

In a climate of administrative reform, the Government is attempting to address the Treaty of Waitangi and to give practical significance to its guarantees. This study assumes that without an understanding of terms used in the Treaty, attempts at its implementation face misunderstanding and confusion. Thus, the study begins by defining "rangatiratanga" as guaranteed in the Maori text of the Treaty. It proposes that rangatiratanga, within the framework of Maori tradition, is a process through which leadership is defined and decisions made. Fundamental to this process is a view of the world which

APA, Harvard, Vancouver, ISO, and other styles

49

Sweet, Natalie L. "Paleoecology and sedimentology of late Silurian biogenic structures in the Duoro and Devon Island Formations on western Devon and southwestern Ellesmere Islands, Arctic Canada." Thesis, University of Ottawa (Canada), 1995. http://hdl.handle.net/10393/10385.

Full text

Abstract:

Carbonate buildups of late-Ludlow-Pridoli age occur within an extensive Silurian reef 'belt' in the Canadian Arctic Islands. Two phases of mound development were documented. The buildups include mudmounds in the uppermost Douro Formation on western Devon Island, and skeletal mounds in the Devon Island Formation on southwestern Ellesmere, North Kent, and Seal islands and Colin Archer Peninsula on Devon Island. The mudmounds average 50m in diameter and 15m in height, and are composed predominantly of sparsely fossiliferous lime mudstone containing sponge spicules and micrite fabrics of probable

APA, Harvard, Vancouver, ISO, and other styles

50

Johnstone, Jill F. "Responses of Cassiope tetragona, a high Arctic evergreen dwarf shrub, to variations in growing season temperature and growing season length at Alexandra Fiord, Ellesmere Island." Thesis, 1995. http://hdl.handle.net/2429/3845.

Full text

Abstract:

The short-term responses of Cassiope tetragona, a high arctic evergreen shrub, to variations in growing season climate were examined using experimental manipulations of temperature and growing season length at Alexandra Fiord, Ellesmere Island. Surface temperatures in the field were increased an average of 1-2 °C in two communities using open-top greenhouses. Growing season length was altered in a snowbed community by using manual snow manipulations to change the date of snowmelt. Growth and reproductive responses of Cassiope tetragona to these manipulations were observed over two field

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!