This thesis investigates physical processes in Lake Erie, a large, shallow mid-latitude lake, from two perspectives: climate change impacts on the thermal structure and dissolved oxygen concentration and small-scale eddy dynamics generated by internal Kelvin wave propagation. A three-dimensional hydrodynamic and aquatic ecological coupled model ELCOM-CAEDYM, validated by the field data collected in 2008, is first used to investigate the responses of the thermal structure and dissolved oxygen concentration in Lake Erie to potential changes in air temperature and wind speed. A new method is presented to define spatially and temporally varying regions for the epilimnion, thermocline, and hypolimnion. Four metrics are selected to quantify the characteristics of the thermal structure: mean epilimnion temperature, mean hypolimnion temperature, onset and breakdown of stratification, and thermocline depth. Exploiting the power of the three dimensional model to provide a more authentic characterization of thermal structure in such large lakes, it is shown that patterns inferred from simple isotherm dynamics, as typically done with one dimensional models, are not always accurate. In the dissolved oxygen studies similar analyses are presented. Three factors related to lake hydrodynamics have strong influences on hypolimnetic hypoxia: water temperature, stratification duration, and hypolimnion thickness. The present results show the potential for complicated and interactive effects of climate forcing on important biogeochemical processes in Lake Erie as well as other large mid-latitude lakes. Taking advantage of high performance computing, the generation of eddies when a baroclinic Kelvin wave propagates past a peninsula is studied using the MITgcm. The grid resolution can be refined from 2 km to 200 m in the parallel computing environment. With the finer resolution small-scale processes which cannot be resolved in the coarse resolution applied previously are able to be explored. The eddy dynamics are studied in detail in both an idealized lake and in Lake Erie. This work presents a first attempt at simulating small-scale hydrodynamic processes in large lakes and contributes to our understanding of how energy is moved from large scales (the scale of the basins in Lake Erie) to smaller scales (the scale of the peninsula or Point Pelee).

Since their introduction to Lake Erie, dreissenid mussels may have reengineered the cycling of nutrients in the lake so that the nearshore benthic community intercepts, retains, and recycles greater quantities of nutrients. This study traces particulate matter on a basin scale by characterizing the chemical composition (POC and PN concentrations, POC/PN mass ratios, δ¹³C and δ¹⁵N) of suspended particulate matter in Lake Erie, three tributary inflows, and the lake outflow between May and October, 2002. The data are used to 1) determine the relative contributions of allochthonous and autochthonous sources to suspended particulate matter, 2) identify possible sources of suspended particulate matter, and 3) compare suspended particulate matter in the eastern basin of Lake Erie with that in the central and western basins. Mean POC concentrations range from 175 to 4494 µg/L and mean PN concentrations range from 33 to 812 µg/L in this system. Mean POC/PN mass ratios are similar across all sampling locations, ranging between 4. 5 and 6. 9, and indicate that suspended particulate matter at these sites is mainly derived from autochthonous sources, particularly plankton. The ranges of δ¹³C (-34 to -22 ?) and δ¹⁵N (1 to 12 ?) identify terrestrial plants and soil matter, aquatic macrophytes, phytoplankton, and sewage as possible sources of suspended particulate matter at all sites. Plankton is probably the dominant source of suspended particulate matter at each site, with smaller contributions from allochthonous and other autochthonous sources. Significant differences in the concentration and isotope data between inflow and lake or outflow sites indicate that tributary inflows may receive greater contributions from terrestrial plants and soils and aquatic macrophytes than the lake and outflow. δ¹⁵N signatures also identify animal manure as a possible source of suspended particulate matter at the inflows. PN concentrations and δ¹⁵N signatures suggest that the shallowest nearshore sites close to Peacock Point in the eastern basin receive PN from a source that is not present at the other eastern basin sites or at the sites in the central and western basins. This source may be related to dreissenid mussels at these nearshore sites recycling nitrogen back into the water column.

<em>Cladophora glomerata</em> is a filamentous green alga that currently forms extensive blooms in nearshore areas of Lake Ontario, eastern Lake Erie, Lake Michigan, and isolated locations in Lake Huron. The biomass, areal coverage, algal bed characteristics, and tissue phosphorus concentrations of <em>Cladophora glomerata</em> were measured at 24 nearshore rocky sites along the northern shoreline of Lake Erie?s eastern basin between 1995-2002. Midsummer areal coverage at shallow depths (&le;5m) ranged from 4-100 %, with a median value of 96%. Peak seasonal biomass ranged from <1 to 940 g m^-2 dry mass (DM), with a median value of 171 g m^-2 DM. Tissue phosphorus varied seasonally, with initial high values in early May (0. 15 to 0. 27 % DM; median 0. 23 % DM) to midsummer seasonal low values during peak biomass (0. 03 to 0. 23 % DM; median 0. 06 % DM). A numerical <em>Cladophora</em> growth model (CGM) was revised and field-tested at 5 sites in eastern Lake Erie during 2002. The CGM is useful for: 1) Predicting <em>Cladophora</em> growth, biomass, and tissue phosphorus concentrations under non-point source P loading with no depth restrictions; 2) providing estimates of the timing and magnitude of the midsummer sloughing phenomenon; 3) determining the contribution of <em>Dreissena</em> invasion to the resurgence of <em>Cladophora</em> in eastern Lake Erie; and 4) developing management strategies for <em>Cladophora</em> abatement. The CGM was applied to investigate how the spatial and temporal patterns of <em>Cladophora</em> growth were influenced by the natural variability in environmental parameters in eastern Lake Erie. Seasonal patterns in <em>Cladophora</em> growth were strongly influenced by temperature, and peak depth-integrated biomass was strongly influenced by both available light and phosphorus. The photosynthetic capacity of field collected <em>Cladophora</em> was a poor predictor of the mid-summer sloughing phenomenon. The CGM, however, predicted that self-shading within the dense <em>Cladophora</em> mats would have caused negative growth rates at the base of the dense mats for 14 days prior to the sloughing event. The metabolic imbalances at the base of the <em>Cladophora</em> mats were driven primarily by the availability of light and were exacerbated by intermediate water temperatures (~23°C). The excellent agreement between model simulations and field data illustrates the ability of the CGM to predict tissue P and growth over a range of sites and depths in eastern Lake Erie and suggests potential for the model to be successfully applied in other systems.

This thesis investigates physical processes in Lake Erie, a large, shallow mid-latitude lake, from two perspectives: climate change impacts on the thermal structure and dissolved oxygen concentration and small-scale eddy dynamics generated by internal Kelvin wave propagation. A three-dimensional hydrodynamic and aquatic ecological coupled model ELCOM-CAEDYM, validated by the field data collected in 2008, is first used to investigate the responses of the thermal structure and dissolved oxygen concentration in Lake Erie to potential changes in air temperature and wind speed. A new method is presented to define spatially and temporally varying regions for the epilimnion, thermocline, and hypolimnion. Four metrics are selected to quantify the characteristics of the thermal structure: mean epilimnion temperature, mean hypolimnion temperature, onset and breakdown of stratification, and thermocline depth. Exploiting the power of the three dimensional model to provide a more authentic characterization of thermal structure in such large lakes, it is shown that patterns inferred from simple isotherm dynamics, as typically done with one dimensional models, are not always accurate. In the dissolved oxygen studies similar analyses are presented. Three factors related to lake hydrodynamics have strong influences on hypolimnetic hypoxia: water temperature, stratification duration, and hypolimnion thickness. The present results show the potential for complicated and interactive effects of climate forcing on important biogeochemical processes in Lake Erie as well as other large mid-latitude lakes. Taking advantage of high performance computing, the generation of eddies when a baroclinic Kelvin wave propagates past a peninsula is studied using the MITgcm. The grid resolution can be refined from 2 km to 200 m in the parallel computing environment. With the finer resolution small-scale processes which cannot be resolved in the coarse resolution applied previously are able to be explored. The eddy dynamics are studied in detail in both an idealized lake and in Lake Erie. This work presents a first attempt at simulating small-scale hydrodynamic processes in large lakes and contributes to our understanding of how energy is moved from large scales (the scale of the basins in Lake Erie) to smaller scales (the scale of the peninsula or Point Pelee).

On June 1, 1866, one thousand heavily-armed Irish-American Fenian insurgents invaded Upper Canada across the Niagara River from Buffalo, NY. The next day near the town of Ridgeway, 800 Fenians battled with 850 Canadian volunteer soldiers, including a small company of 28 University of Toronto students who ended up taking the brunt of the attack. The Battle of Ridgeway (or Lime Ridge or Limestone Ridge) ended with a disastrous rout of the Canadians who in their panicked retreat left their dead and wounded on the field. It was the last major incursion into Canada, the last battle in Ontario and the first modern one fought by Canadians, led in the field exclusively by Canadian officers, and significantly fought in Canada. The Fenian Raid mobilized some 22,000 volunteer troops and resulted in the suspension of habeas corpus in the colonial Province of Canada by its Attorney General and Minister of Militia John A. Macdonald, but the battle which climaxed this crisis is only prominent by its obscurity in Canadian historiography. Almost everything known and cited about Ridgeway springs from the same sources—four books and pamphlets—three of them published in the summer of 1866 immediately after the event and the remaining one in 1910. This dissertation argues that the history of the battle was distorted and falsified by these sources and by two military board of inquiries staged to explicitly cover up the extent of the disaster. This study investigates the relationship between the inquiries and the contemporary author-historians of two of the sources: Alexander Somerville, an investigative journalist in Hamilton, Ontario, a recent immigrant from Britain with a controversial history; and George T. Denison III, a prominent young Toronto attorney, a commander of a troop of volunteer cavalry, a former Confederate secret service agent, author-commentator on Canada’s military policy and presiding judge on both boards of inquiry. This study describes the process by which Ridgeway’s history was hidden and falsified and its possible scope and significance in Canadian historiography. New archival and published sources are identified, assessed and assembled for a newly restored and authenticated micro-narrative of the battle.

On June 1, 1866, one thousand heavily-armed Irish-American Fenian insurgents invaded Upper Canada across the Niagara River from Buffalo, NY. The next day near the town of Ridgeway, 800 Fenians battled with 850 Canadian volunteer soldiers, including a small company of 28 University of Toronto students who ended up taking the brunt of the attack. The Battle of Ridgeway (or Lime Ridge or Limestone Ridge) ended with a disastrous rout of the Canadians who in their panicked retreat left their dead and wounded on the field. It was the last major incursion into Canada, the last battle in Ontario and the first modern one fought by Canadians, led in the field exclusively by Canadian officers, and significantly fought in Canada. The Fenian Raid mobilized some 22,000 volunteer troops and resulted in the suspension of habeas corpus in the colonial Province of Canada by its Attorney General and Minister of Militia John A. Macdonald, but the battle which climaxed this crisis is only prominent by its obscurity in Canadian historiography. Almost everything known and cited about Ridgeway springs from the same sources—four books and pamphlets—three of them published in the summer of 1866 immediately after the event and the remaining one in 1910. This dissertation argues that the history of the battle was distorted and falsified by these sources and by two military board of inquiries staged to explicitly cover up the extent of the disaster. This study investigates the relationship between the inquiries and the contemporary author-historians of two of the sources: Alexander Somerville, an investigative journalist in Hamilton, Ontario, a recent immigrant from Britain with a controversial history; and George T. Denison III, a prominent young Toronto attorney, a commander of a troop of volunteer cavalry, a former Confederate secret service agent, author-commentator on Canada’s military policy and presiding judge on both boards of inquiry. This study describes the process by which Ridgeway’s history was hidden and falsified and its possible scope and significance in Canadian historiography. New archival and published sources are identified, assessed and assembled for a newly restored and authenticated micro-narrative of the battle.

Thesis (M.A.)--Kutztown University, 1989. / Source: Masters Abstracts International, Volume: 45-06, page: 2920. Typescript. Includes bibliographical references (leaves 127-133).

Thesis (M.A.)--Bowling Green State University, 2007. / Document formatted into pages; contains x, 127 p. : ill. (some col.) Includes bibliographical references.

Thesis (Ph.D.)--Kent State University, 2006. / Title from PDF t.p. (viewed Mar. 5, 2009). Advisor: Robert T Heath. Keywords: bacterioplankton, phosphorus dynamics, bacterial bioenergetics, labile dissolved organic carbon, bacterial productivity, bacterial respiration, bacterial growth efficiency, Lake Erie, hypoxia. Includes bibliographical references (p. 357-397).

Thesis (Ed.D.)--Teachers College, Columbia University, 1996. / Typescript; issued also on microfilm. Sponsor: Philip Fey. Dissertation Committee: Kathleen Loughlin. Includes bibliographical references (leaves 312-322).