No description available.

Thesis (M.S.)--OGI School of Science & Engineering at OHSU, Oct. 2006. / Includes bibliographical references.

Walks organised at the community or 'grass roots' level both in Australia and internationally have been organised as a means to highlight environmental and social issues to the wider community. This thesis focuses on a coastal walk from Melbourne to Sydney during November 1993 to March 1994 called CoastWalk which was organised as part of the Australian Conservation Foundation's 'Coasts in Crisis' campaign. The Walk aimed to highlight environmental management problems specific to the coastal zone at both local and national levels using mass media, information evenings and targeting groups within local communities. Using a case study approach to the methodology, combined with principles from both social (interpretive) and empirical methods, this study involved determining the impact of CoastWalk, i.e. whether it changed individuals at the levels of awareness, understanding or action. The scope of the study does not include a detailed analysis of the communities themselves, nor does it explore the psychological aspects of individual and social change. It was found that the mass media aspect of the CoastWalk campaign created a short term awareness of the need to have concern for coastal management issues in those who did not participate in the Walk. For those who did participate, the impact was deeper and profound, changing individuals understanding and actions towards coastal management and translating into other areas of their lives. The impact of the Walk on local community groups who supported the Walk was negligible and it was determined that CoastWalk did not meet their needs. Community involvement in environmental management or campaigning equates to long term ownership and responsibility being taken for those issues. However, neither community nor government intervention in environmental management alone can resolve these issues successfully. This thesis argues that a combined approach from both community and government organisations is required - but as exemplified by CoastWalk, the success of this approach requires equality in communication and co-operation. As other environmental awareness walks have occurred, it is evident that they are perceived as worthy events by the community, and that there is potential for them to occur again in the future. It is therefore essential for an evaluation to occur of the techniques used to achieve their environmental education aims. Thus, the learning from previous Walks can be built into future Walks enhancing their success.

Graduation date: 1964

Using the hydrographic data collected by the ACONA from June 1961 to May 1963, the Oregon coastal front has been examined. Representative sigma-t surfaces were chosen to delineate the front, and changes in position of these surfaces with time were used to obtain zonal flow rates for the frontal and surface layers. From May to early October upwelling resulted in offshore flow. Onshore flow was indicated from late October to January, and indeterminate zonal flow occurred during the remainder of the year. Flow within the front agreed with these surface flows in ten of the fourteen observational periods. / Graduation date: 1964

Thesis (M. Phil.)--University of Hong Kong, 1985.

published_or_final_version / Zoology / Master / Master of Philosophy

No description available.

The climate and the exchange of heat between atmosphere and ocean are examined in a region adjacent to Washington and Oregon, and in two sub-regions adjacent to Oregon. The sub-regions are chosen such that one contains the nearshore upwelling region and the other borders it on the seaward side. The data (ship weather observations, 1953 to 1962) reveal the general seasonal variation of climatic factors in the regions studied and the effects of the nearshore upwelling of cold water on the climate over the coastal ocean region and the adjacent coastal land mass. In the nearshore sub-region, summer values of temperature (air, wet bulb, and sea surface) are lower than those to seaward, but winter values are higher inshore than to seaward. The effects of these differences, and of other factors, on the heat exchange processes are examined with the use of empirical equations. It is seen that the processes of evaporation and conduction are suppressed considerably and net long wave radiation is slightly suppressed in the upwelling region during the summer. The effects of the reduction of heat loss to the atmosphere in the summer upwelling region on the climate of coastal Oregon are seen to be a slight reduction of air temperatures and, despite reduced evaporation, a very slight increase of relative humidity. Monthly means of daily net heat exchange between the sea and the atmosphere are examined and correlated with the difference between monthly means of the heat used per day in the oceanic evaporation process and the monthly means of daily totals of heat estimated to be used in the evaporation from a shallow pan under climatic conditions identical to those accompanying the net heat exchange and oceanic evaporation. / Graduation date: 1965

Sediments on the inner portion of the Oregon continental shelf consist of clean, well-sorted, detrital sand. This sand has an average median diameter of 2.53Φ (. 173 mm) and is both positively and negatively skewed. Deposits with median diameters in the coarse sand and gravel classes occur at depths of 20 to 40 fathoms and probably represent ancient beach or fluviatile deposits formed during lower stands of sea level. The outer shelf and upper slope are covered by poorly sorted sediments with median diameters in the fine sand to fine silt classes. Mean diameters of the sediments are almost always smaller than their median diameters and the sediments are positively skewed. The heavy mineral assemblages are dominated by the amphibole and pyroxene groups and the opaque-garnet association. Pyroxenes are most abundant in the coarser-grained sediments of the inner shelf and decrease in abundance offshore. Amphiboles are most abundant in the finer-grained sediments of the outer shelf and upper slope. Highest concentrations of the opaque-garnet association also are found in the inshore samples. Sediments of the continental shelf are derived from two principal sources, rivers and erosion of coastal terrace deposits. Rivers are probably contributing only fine-grained material to the shelf as much of the coarser fluviatile material is thought to be trapped in the estuaries. The terrace deposits are actively being eroded and are thought to contribute about 21,000,000 cubic feet (.00013 cubic miles) of sediment to the continental shelf annually. Evidence suggests that much of the inner-shelf sand is probably a relict transgressive sheet sand that was deposited during the last rise in sea level. Most of the deposition of the modern sand on the shelf has been confined to the inner portion of the inner shelf. Finer-grained sediments have been deposited on the outer shelf and upper slope. Characteristics of the sediments on the present continental shelves may be useful in identifying continental shelf deposits in the geologic column. / Graduation date: 1966