The Gascoyne continental shelf is located along the north-central coastline of Western Australia between latitudes 21° and 28°S. This study presents CTD and ADCP data together with concurrent wind and satellite imagery, to provide a description of the summer surface circulation pattern along the continental margin, and the hydrography present in the upper 1km of ocean, between latitudes 21° and 35°S. It also discusses the outcome of a numerical modelling study that examined the physical factors contributing to a bifurcation event persistently observed in satellite imagery at Point Cloates. The region comprises a complex system of four surface water types and current systems. The Leeuwin Current dominated the surface flow, transporting lower salinity, warmer water poleward along the shelf-break, and causing downwelling. Its signature ‘aged’ from a warm (24.7°C), lower salinity (34.6) water in the north to a cooler (21.9°C), more saline (35.2) water in the south, as a result of 2-4Sv geostrophic inflow of offshore waters. The structure and strength of the current altered with changing bottom topographies. The Ningaloo Current flowed along the northernmost inner coast of the Gascoyne shelf, carrying upwelled water and re-circulated Leeuwin Current water from the south. Bifurcation of the Ningaloo Current was seen south of the coastal promontory at Point Cloates. Numerical modelling demonstrated a combination of southerly winds and coastal and bottom topography off Point Cloates to be responsible for the recirculation, and indicated that the strength of southerly winds affect recirculation. Hypersaline Shark Bay outflow influenced shelf waters at the Bay’s mouth and to the south of the Bay. The Capes Current, a wind-driven current from south of the study region was identified as a cooler, more saline water mass flowing northward. Results of the hydrography study show five different water masses present in the upper-ocean. Their orientations were affected by the geopotential gradient driven Leeuwin Current/Undercurrent system at the continental margin. The Leeuwin Undercurrent was found at the shelf-slope, carrying (>252 μM/L) Subantarctic Mode Water at a depth of 400m

[Truncated abstract] The study of eastern ocean boundary currents has been principally restricted to the Pacific and Atlantic ocean regions. The traditional view of the circulation near eastern ocean boundaries is that upwelling-favourable winds force surface waters offshore, leading to upwelling of cold, nutrient-rich subsurface water at the coast, the formation and offshore advection of a coastal front, and the generation of alongshore currents, generally having an equatorward surface flow and a poleward undercurrent. The eastern ocean boundary system of the southern Indian Ocean, off the west coast of Australia, is unique compared with these regions because a warm, poleward surface flow, known as the Leeuwin Current, dominates the dynamics over the continental shelf. Satellite imagery has shown the Leeuwin Current consists of a complex system of meanders, jet-like streams, and eddies, and has a seasonal and interannual variability. The oceanic circulation of the region between Carnarvon (latitude 25°S) and Jurien Bay (latitude 31°S) was examined using observational and remotely sensed data in conjunction with a detailed numerical modelling study. The model was validated using in situ ADCP and CTD data, and the horizontal eddy viscosity parameterization was tested against field observations. ... The resulting offshore meander grew laterally, shallowed, and closed to form an anticlockwise eddy to the original clockwise eddy’s south, forming a characteristic LC eddy pair (dipole). The model demonstrated the LC and Leeuwin Undercurrent (LUC) coupling played an important role in the onset of eddies at both sites. When an energy diagnostic scheme was used, the dominant instability process linked to the anticlockwise eddy’s development at site 1 was a mixed mode barotropic and baroclinic instability. The baroclinic instability’s source was the available potential energy stored within the mean lateral density gradient. The LC’s meandering southerly flow interacting with the LUC’s northerly subsurface flow generated the horizontal shear that sourced the barotropic instability. The dominant instability process at site 2 was baroclinic in origin. Possible links between the eddy field dynamics and the shelfslope region’s alongshore topographic variability were considered. The results of a suite of five model runs, differing only in the specification of bottom topography, were contrasted to investigate the effects. Except for the expected alongshore variability, delay in the onset of instabilities, varying growth rates, and some differences in the dominant wavebands’ mesoscale patterns, the overall impression was the response was similar.

D.Litt. et Phil. / Please refer to full text to view abstract

Mini-study project (MBA)--University of Stellenbosch, 2003. / ENGLISH ABSTRACT: The processes of regionalism and regionalisation, of which a relatively high level is evident in the Indian Ocean Rim (lOR), that characterise today's global economy offer opportunities for economic growth and development to the mainly developing countries in the Indian Ocean Rim. The lOR has achieved the status of regional society which contributes towards the region actively articulating the interests of the member nations. The lesser-developed countries may well use this developing regionalisation in the lOR to combat its risk of marginalisation in the global order. Great diversity and disparity exist amongst lOR countries on levels of economic development, growth and openness, resulting in few countries achieving the major portion of the region's economic activities. This may complicate the development needs of the nation-states resulting in a low level of development uniformity. Such diversity poses a risk of polarised and unequal investment and development amongst member nations, and ultimately marginalisation in the global order. This does not support economic integration, but calls for economic co-operation to assist with economic development of the lOR. The lOR, as part of the global trading process, comprises a significant portion of the world's trade arising from the region and it presents a large market in the global economy. The lOR is further predominantly developing under the framework and rules of the WTO. Comparing the lOR-ARC with other regional organisations involving main global trading nations, it is evident that in trade volume and economic impact it is not comparable. However, the strategic importance of its energy resources and its locality in particular raises the prominence of the region in the global order. A low level of regional trade exists in the region resulting in the lOR countries being poor candidates for regional integration. However, it is significant to note that intra-regional trade in the lOR has over recent years grown significantly higher than its trade with the world. SA, as hegemon in Southern Africa, may gain development opportunities from its prominence in the lOR. The emerging African Union and NEPAD, however, are expected to receive higher priority amongst political decision makers than the lOR. The country's existing trade focus is with the developed North and it appears that the broader focus in the immediate future will be with mainly non-lOR countries. Variable geometry amongst the nations is common and developments amongst the region's numerous sub-regional groupings are leaning heavily towards economic integration into the future. A high level of institutionalisation has developed out of the role and activities of the lOR-ARC in the region. The IOR-ARC's principle of open regionalism promotes integration. The lOR-ARC, originally aimed at multi-sector cooperation as part of its focus on economic co-operation, is therefore expected to move towards economic integration into the future. When considering a broader perspective, it is evident that the lOR's readiness to embrace economic integration at this point is relatively low. Overall the focus within the lOR although currently focussing on economic cooperation, is expected to move towards economic integration, or neo-functional integration, into the medium to long term. / AFRIKAANSE OPSOMMING: Die prosesse van regionalisme en regionalisasie wat die hedendaagse globale ekonomie kenmerk en hulself manifesteer op relatiewe hoë vlak binne die Indiese Oseaan Randgebied (lOR), bied geleenthede vir ekonomiese groei en ontwikkeling aan die hoofsaaklik ontwikkelende lande in the lOR. Die lOR het die entiteit status van streeks-gemeenskap bereik wat dit in staat stelom by te dra om die lidlande se belange te artikuleer. Die minder-ontwikkelde lande mag egter hierdie ontwikkelende regionalisasie uitsluitlik gebruik om hul risiko tot marginalisasie in die globale orde te beperk. Hoë vlakke van diversiteit en dispariteit bestaan tussen die lOR lande in areas van ekonomiese ontwikkeling, groei en toeganklikheid, wat aanleiding gee dat 'n paar lande die oorgrote meerderheid ekonomiese aktiwiteite en bydrae lewer. Hierdie tendens mag egter lidlande se ontwikkelingsbehoeftes kompliseer wat lei tot 'n lae vlak van ontwikkeling-eenvormigheid in die streek. Hierdie diversiteit skep 'n risiko van gepolariseerde en ongelyke investering en ontwikkeling by die lidlande, en gevolglik 'n risiko van globale marginalisasie. Hierdie aspekte ondersteun nie ekonomies integrasie nie, maar eerder ekonomiese samewerking om by te dra tot die ekonomiese ontwikkeling van die lOR. Die lOR, as deel van die globale handelsproses, maak 'n noemenswaardige gedeelte uit van wêreldhandel, met oorsprong in die streek, en die streek bied 'n groot mark binne die globale ekonomie. Die ontwikkeling van die lOR in hierdie aspek vind hoofsaaklik plaas binne die raamwerk en reëls van die Wêreld Handelsorganisasie. 'n Vergelyking tussen die Indiese Oseaan Randgebied Assosiasie vir Ekonomiese Samewerking (lOR-ARC) en ander streeksorganisasies, wat die hoof globale handeldrywende nasies insluit, toon duidelik dat die lOR-ARC in handelsvolume en ekonomiese impak nie vergelykbaar is nie. Die strategiese belangrikheid van die energiebronne en die streeksligging in besonder, verhoog egter die belangrikheid van die streek in die wêreld orde. Die huidige lae streekshandel in die lOR dra daartoe by dat die lOR lande nie sterk kandidate vir streeksintegrasie is nie, alhoewel merkwaardige groei die afgelope jare op intra-streekshandel in die lOR voorgekom het. Sulke groei was aansienlik hoër as groei in lOR handel met die wêreld. SA, as hegemonie in Suider-Afrika, mag baat by ontwikkelingsgeleenthede wat mag uitvloei uit die land se prominensie in die lOR. Die Afrika Unie en NEPAD sal na verwagting egter hoër prioriteit by politieke besluitnemers geniet as die lOR. SA se gevestigde handelsfokus is gemik op die ontwikkelde "Noorde", en dit blyk asof die onmiddelike breër handelsfokus hoofsaaklik op nie-lOR lande gaan mik. Wisselende geometrie is algemeen by lOR lande en verdere verwikkelinge tussen die streek se veelvuldige sub-streeksorganisasies neig sterk na toekomstige ekonomiese integrasie. 'n Hoë vlak van institusionalisering het ontwikkel uit die rol en aktiwiteite van die lOR-ARC in streeksverband. Die lOR-ARC se beginsel van ope regionalisme bevorder integrasie verder. Die verwagting is dat die lOR-ARC, met sy oorsprong in multi-sektor ekonomiese samewerking, in die toekoms gaan beweeg na ekonomiese integrasie. Vanuit In breër perspektief gesien is dit duidelik dat die gereedheid van die lOR om ekonomiese integrasie aan te gryp tans relatief laag is. In die geheel gesien word die lOR, met die huidige fokus op ekonomiese samewerking, verwag om te beweeg na ekonomiese integrasie of neo-funksionele integrasie in die medium tot langtermyn.

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<p>From 2008-2012, a dramatic upsurge in incidents of maritime piracy in the Western Indian Ocean led to renewed global attention to this region: including the deployment of multi national naval patrols, attempts to prosecute suspected pirates, and the development of financial interdiction systems to track and stop the flow of piracy ransoms. Largely seen as the maritime ripple effect of anarchy on land, piracy has been slotted into narratives of state failure and problems of governance and criminality in this region. </p><p>This view fails to account for a number of factors that were crucial in making possible the unprecedented rise of Somali piracy and its contemporary transformation. Instead of an emphasis on failed states and crises of governance, my dissertation approaches maritime piracy within a historical and regional configuration of actors and relationships that precede this round of piracy and will outlive it. The story I tell in this work begins before the contemporary upsurge of piracy and closes with a foretaste of the itineraries beyond piracy that are being crafted along the East African coast. </p><p>Beginning in the world of port cities in the long nineteenth century, my dissertation locates piracy and the relationship between trade, plunder, and state formation within worlds of exchange, including European incursions into this oceanic space. Scholars of long distance trade have emphasized the sociality engendered through commerce and the centrality of idioms of trust and kinship in structuring mercantile relationships across oceanic divides. To complement this scholarship, my work brings into view the idiom of protection: as a claim to surety, a form of tax, and a moral claim to authority in trans-regional commerce.</p><p>To build this theory of protection, my work combines archival sources with a sustained ethnographic engagement in coastal East Africa, including the pirate ports of Northern Somalia, and focuses on the interaction between land-based pastoral economies and maritime trade. This connection between land and sea calls attention to two distinct visions of the ocean: one built around trade and mobility and the other built on the ocean as a space of extraction and sovereignty. Moving between historical encounters over trade and piracy and the development of a national maritime economy during the height of the Somali state, I link the contemporary upsurge of maritime piracy to the confluence of these two conceptualizations of the ocean and the ideas of capture, exchange, and redistribution embedded within them.</p><p>The second section of my dissertation reframes piracy as an economy of protection and a form of labor implicated within other legal and illegal economies in the Indian Ocean. Based on extensive field research, including interviews with self-identified pirates, I emphasize the forms of labor, value, and risk that characterize piracy as an economy of protection. The final section of my dissertation focuses on the diverse international, regional, and local responses to maritime piracy. This section locates the response to piracy within a post-Cold War and post-9/11 global order and longer attempts to regulate and assuage the risks of maritime trade. Through an ethnographic focus on maritime insurance markets, navies, and private security contractors, I analyze the centrality of protection as a calculation of risk and profit in the contemporary economy of counter-piracy. </p><p>Through this focus on longer histories of trade, empire, and regulation my dissertation reframes maritime piracy as an economy of protection straddling boundaries of land and sea, legality and illegality, law and economy, and history and anthropology.</p> / Dissertation

This dissertation examines the notion of nationhood and the intricacies of identity in Mauritius as depicted in the work of artists from this island. Through the writing of Ananda Devi, Shenaz Patel, Natacha Appanah, Amal Sewtohul, and Carl de Souza, as well as through the works of filmmakers Harikrisna Anenden and David Constantin, I analyze the distinctive ways in which these artists explore the burden of a traumatic past along with their ensuing representations of the present images of the Mauritian people. Their works best encapsulate the paradoxical place that Mauritius holds in the Francophone and Anglophone world, i.e. that it was first a French and then a British colony, which respectively introduced slavery and indentured servants to this island that had no autochthone population. As a result, the question of identity – both individual and national – remains intrinsically linked to the memory of slavery and of indentured servitude/Coolitude, in a country which history prior to colonization has little been explored. Thus far, critical work in Francophone literature has studied these two memories separately. My analysis creates a dialogue between them. This is crucial to the understanding of just how the intersection of slavery and Coolitude, have shaped today’s Mauritian national identity. Each chapter raises a key question on the subject: How does the writing of Devi, along with Anenden’s cinema, both of which are centered on marginalized communities, present a critical framework through which the socio-economic issues of the island can be studied? In what ways does Appanah’s fiction convoke historical events, while problematizing deeply engrained power dynamics? What does it mean for Patel and Constantin to give voice to the subaltern and to speak for/instead of a minority group? Finally, how do the works of these different writers, namely Patel, Appanah, Sewtohul and de Souza, address the complexities and tensions within the multicultural society of Mauritius? My conclusion reflects on the critical role and impact of artistic expression in the creation of a mosaic in which we can better understand the Mauritian nation when this country is at the milestone of 50 years of independence. / 2020-11-27T00:00:00Z

The popular tourist destination island of Koh Phi Phi Don, Thailand was heavily affected by the Indian Ocean Tsunami in December 2004, which resulted in a destroyed tourism infrastructure and complete downturn of tourism. Extensive recovery and rebuilding work by emerging community groups, returned locals, international volunteers and Thai government units provided an efficient but hasty reconstruction of the destination. Ethnographic research conducted in the community provided insights into the complex stakeholder interactions and their roles and influences on the reconstruction of the community. The community�s level of vulnerability on Koh Phi Phi Don was influenced by social processes and interactions during the destination�s recovery process as the various stakeholders (e.g. government vs. locals) had differing perceptions of the island�s economic, environmental and social vulnerability. These disputes are grounded in different social time processes, particularly illustrated through land law disputes among locals, landowners and the government. Other factors which influenced the reconstruction of Koh Phi Phi as a tourist destination were pre-tsunami conditions (past overdevelopment), the empowerment of the community, the reconstructed place identity, various anniversary celebrations and the early warning system. A model is suggested to illustrate and discuss Koh Phi Phi Don as a disaster destination, which provides insights into the dynamics which govern a destination�s post-disaster recovery period. Thus, it illustrates how stakeholder interaction is influenced by distinct understandings of the multiple notions of vulnerability. Furthermore, this study establishes essential links between disaster and tourism theories and suggests an extended tourism disaster management framework, which calls for an inclusion of post-recovery processes.

Thesis (M.A.)--Ohio University, June, 2006. / Title from PDF t.p. Includes bibliographical references (leaves 67-69)

The physical oceanography in the northwest Indian Ocean is largely controlled by the seasonal monsoon. The seasonal variability in circulation is complex. Many studies have investigated processes in the Persian (Arabian) Gulf and Arabian Sea, but little is understood about the Sea of Oman. This thesis incorporated observations from Argo floats, surface drifters and satellite imagery to study the deep and surface circulation in the northwest Indian Ocean. An assessment of four independent moorings located in the Sea of Oman and Arabian Sea, as well as a model skill comparison of the Simple Ocean Data Assimilation (SODA) model, contributed to understanding the dynamics in this region. Spatial patterns of surface current velocity produced from surface drifter data from 1995-2009 agreed with previously known surface currents. The Somali Current, East Arabian Current, Equatorial Current, Northeast/Southwest Monsoon Current, Great Whirl and Ras al Hadd Jet were all identified. During the Southwest Monsoon, flow direction was to the east and southeast in the Arabian Sea. The Somali Current flowed northeast along the Somali Coast extending to the East Arabian Current along the Oman coast. During the Northeast Monsoon, evaporation increased over the Arabian Sea, which resulted in a salinity gradient. This imbalance caused low-salinity surface water from the northeast Indian Ocean to flow into the northwest Indian Ocean as the Northeast Monsoon Current. Current direction reversed with the change of wind direction from the Southwest Monsoon to the Northwest Monsoon. Many characteristics seen at the surface were also identified in the subsurface as deep as 1500m. The comparison of moored observations to the Argo observations co-located in space and time showed reasonable agreement with the largest salinity difference of 0.23 and largest temperature difference of 0.78?C. The Murray Ridge mooring had a temperature correlation of 0.97 when compared to Argo observations. Argo observations were compared with SODA model numerical output from 1992-2001, and, after Argo, were assimilated from 2002-2009. With assimilation of Argo data into the SODA model, the temperature and salinity from the model numerical output improved, with most differences between model numerical output and Argo observations falling within one standard deviation.