717 research outputs found

    Beyond mitigation : potential options for counter-balancing the climatic and environmental consequences of the rising concentrations of greenhouse gases

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    Global climate change is occurring at an accelerating pace, and the global greenhouse gas (GHG) emissions that are forcing climate change continue to increase. Given the present pace of international actions, it seems unlikely that atmospheric composition can be stabilized at a level that will avoid"dangerous anthropogenic interference"with the climate system, as called for in the UN Framework Convention on Climate Change. Complicating the situation, as GHG emissions are reduced, reductions in the offsetting cooling influence of sulfate aerosols will create an additional warming influence, making an early transition to climate stabilization difficult. With significant reductions in emissions (mitigation) likely to take decades, and with the impacts of projected climate change-even with proactive adaptation-likely to be quite severe over the coming decades, additional actions to offset global warming and other impacts have been proposed as important complementary measures. Although a number of possible geoengineering approaches have been proposed, each has costs and side effects that must be balanced against the expected benefits of reduced climate impacts. However, substantial new research is needed before comparison of the relative benefits and risks of intervening is possible. A first step in determining whether geoengineering is likely to be a useful option is the initiation of research on four interventions to limit the increasing serious impacts: limiting ocean acidification by increasing the removal of carbon dioxide from the atmosphere and upper ocean; limiting the increasing intensity of tropical cyclones; limiting the warming of the Arctic and associated sea level rise; and sustaining or enhancing the existing sulfate cooling influence. In addition, in depth consideration is needed regarding the governance structure for an international geoengineering decision-making framework in the event that geoengineering becomes essential.Montreal Protocol,Climate Change,Energy Production and Transportation,Energy and Environment,Environment and Energy Efficiency

    An estimate of P, T, and water content for a lava from Santorini and thermodynamic applications

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    National Assessment of the Potential Consequences of Climate Variability and Change for the United States

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    The first U.S. National Assessment of the PotentialConsequences of Climate Variability and Change for theUnited States is being conducted under the auspices of theU.S. Global Change Research Program (USGCRP). TheUSGCRP was established through the Global ChangeResearch Act of 1990 (P.L. 101-606) and mandatedthrough the statute with the responsibility to undertakeperiodic scientific assessments of the potentialconsequences of global change for the United States. Thegoal of the National Assessment is to analyze andevaluate what is known about the potential consequencesof climate variability and change for the nation in thecontext of other pressures on the public, the environment,and the nation\u27s resources. The conduct of the nationalassessment process will involve a broad spectrum ofstakeholders from state, local, tribal, and Federalgovernments; business; labor; academia; non-profitorganizations; and the general public. The assessmentwill link research by scientists to specific needs of thestakeholders, and will provide planners, managers,organizations, and the public with the information neededto increase resilience to climate variability and cope withclimate change. The national assessment will becomprised of three components: (1) National synthesis,(2) Sectoral analyses (agriculture, forestry, waterresources, human health, and the coastal zone), and(3) Regional analyses. To facilitate comparison,integration, and synthesis of each of the assessmentcomponents, all regional, sectoral, and synthesis analyseswill use a common set of scenarios for climate change and changes in socio-economic conditions. Specific responsibilities have been defined for oversight of the components of the national assessment and forcoordination activities. A National Assessment SynthesisTeam (NAST) will provide overall intellectual oversightof the national assessment process and has responsibilityfor the development of the Synthesis Report. A NationalAssessment Working Group under the auspices of theUSGCRP has lead responsibility for organizing andsponsoring the sectoral analyses and oversight andcoordination responsibilities for regional analyses. ANational Assessment Coordination Office has beenestablished to facilitate coordination of the entire nationalassessment process. The National Assessment SynthesisReport is targeted for completion by January 1, 2000, andis intended to satisfy the mandate for an assessmentdefined in P.L. 101-606 and serve as part of the U.S.contribution to the IPCC Third Assessment Report

    Succession, Invasion, & Coexistence: PDEs in Ecology

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    We study the behavior of diffusive Lotka-Volterra systems in environments with spatially varying carrying capacities. In particular, we use numeric and analytic techniques to study two similar models for population growth, in order to determine their qualitative differences. Additionally, we investigate competition models in the presence of periodic disasters, in order to determine what factors affect competitive dominance. We found that under conditions of high spatial heterogeneity, the model for population growth was the main factor determining coexistence. Under low spatial heterogeneity, the effect of disturbance on the stronger competitor was the main factor determining coexistence

    Street lighting cost analysis - a simplified approach

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    Thesis (M.B.A.)--Boston Universit

    Letter from Samuel F. MacCracken to James B. Finley

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    MacCracken writes yet another letter asking Finley to visit and preach at Lancaster Station. He does not understand why Finley has not come. Abstract Number - 363https://digitalcommons.owu.edu/finley-letters/1561/thumbnail.jp
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