Technical Note: The impact of spatial scale in bias correction of climate model output for hydrologic impact studies

Statistical downscaling is a commonly used technique for translating large-scale climate model output to a scale appropriate for assessing impacts. To ensure downscaled meteorology can be used in climate impact studies, downscaling must correct biases in the large-scale signal. A simple and generally effective method for accommodating systematic biases in large-scale model output is quantile mapping, which has been applied to many variables and shown to reduce biases on average, even in the presence of non-stationarity. Quantile-mapping bias correction has been applied at spatial scales ranging from hundreds of kilometers to individual points, such as weather station locations. Since water resources and other models used to simulate climate impacts are sensitive to biases in input meteorology, there is a motivation to apply bias correction at a scale fine enough that the downscaled data closely resemble historically observed data, though past work has identified undesirable consequences to applying quantile mapping at too fine a scale. This study explores the role of the spatial scale at which the quantile-mapping bias correction is applied, in the context of estimating high and low daily streamflows across the western United States. We vary the spatial scale at which quantile-mapping bias correction is performed from 2° ( ∼  200 km) to 1∕8° ( ∼  12 km) within a statistical downscaling procedure, and use the downscaled daily precipitation and temperature to drive a hydrology model. We find that little additional benefit is obtained, and some skill is degraded, when using quantile mapping at scales finer than approximately 0.5° ( ∼  50 km). This can provide guidance to those applying the quantile-mapping bias correction method for hydrologic impacts analysis

Many-body dispersion effects in the binding of adsorbates on metal surfaces

A correct description of electronic exchange and correlation effects for molecules in contact with extended (metal) surfaces is a challenging task for first-principles modeling. In this work we demonstrate the importance of collective van der Waals dispersion effects beyond the pairwise approximation for organic--inorganic systems on the example of atoms, molecules, and nanostructures adsorbed on metals. We use the recently developed many-body dispersion (MBD) approach in the context of density-functional theory [Phys. Rev. Lett. 108, 236402 (2012); J. Chem. Phys. 140, 18A508 (2014)] and assess its ability to correctly describe the binding of adsorbates on metal surfaces. We briefly review the MBD method and highlight its similarities to quantum-chemical approaches to electron correlation in a quasiparticle picture. In particular, we study the binding properties of xenon, 3,4,9,10-perylene-tetracarboxylic acid (PTCDA), and a graphene sheet adsorbed on the Ag(111) surface. Accounting for MBD effects we are able to describe changes in the anisotropic polarizability tensor, improve the description of adsorbate vibrations, and correctly capture the adsorbate--surface interaction screening. Comparison to other methods and experiment reveals that inclusion of MBD effects improves adsorption energies and geometries, by reducing the overbinding typically found in pairwise additive dispersion-correction approaches

Migration as an Economic Activity: the Efficiency of Population Redistribution in Viet Nam

Migration policy in Viet Nam views land and populations as economic resources. At reunification, these resources were not evenly distributed, thus the migration policy of the newly formed Socialist Republic of Viet Nam sought to redistribute them in a more efficient manner. However, this viewpoint does not take into account environmental and social factors. These factors include, but are not limited to issues surrounding the suitability of land for cultivation, the choice of crops to be cultivated, the infrastructural supports provided to migrant communities, and the lack of capital being put into the system. As a consequence of these factors, planned migration in Viet Nam is not an efficient use of resources. This inefficiency can be represented using an ecological utility theory of migration coupled with a supply and demand model. This inefficiency results from a contrived ecological utility and insufficient resource input. Reassessing ecological utility and increasing resource input can negate it. This paper speaks on the inefficiencies of population redistribution in post-war Viet Nam in general terms, as well as using specific examples gathered from fieldwork conducted in Say Giang hamlet, Vinh Tri village, Vinh Hung district, Long An province

The Dispossessed State

Do indigenous peoples have an unassailable right to the land they have worked and lived on, or are those rights conferred and protected only when a powerful political authority exists? In the tradition of John Locke and Thomas Hobbes, who vigorously debated the thorny concept of property rights, Sara L. Maurer here looks at the question as it applied to British ideas about Irish nationalism in the nineteenth century. This book connects the Victorian novel’s preoccupation with the landed estate to nineteenth-century debates about property, specifically as it played out in the English occupation of Ireland. Victorian writers were interested in the question of whether the Irish had rights to their land that could neither be bestowed nor taken away by England. In analyzing how these ideas were represented through a century of British and Irish fiction, journalism, and political theory, Maurer recovers the broad influence of Irish culture on the rest of the British Isles.By focusing on the ownership of land, The Dispossessed State challenges current scholarly tendencies to talk about Victorian property solely as a commodity. Maurer brings together canonical British novelists—Maria Edgeworth, Anthony Trollope, George Moore, and George Meredith—with the writings of major British political theorists—John Stuart Mill, Henry Sumner Maine, and William Gladstone—to illustrate Ireland’s central role in the literary imagination of Britain in the nineteenth century.The book addresses three key questions in Victorian studies—property, the state, and national identity—and will interest scholars of the period as well as those in Irish studies, postcolonial theory, and gender studies

Board Member Perceptions of Small Nonprofit Organization Effectiveness

In contemporary American society, the nonprofit board is accountable for ensuring that an organization has sufficient resources to carry out its mission. Filling the gap between demands for services and the resources to meet them is often a struggle for small nonprofit organizations, a problem of nonprofit organization effectiveness. I conducted a hermeneutic phenomenological study that examined how board members of small local nonprofits in the focal community perceived nonprofit organization effectiveness. A review of the literature revealed that nonprofit organization effectiveness involved the action of contributing to the organization and the motivation behind the action, both of which were associated with trust and reciprocity. Guided by social constructivism this research involved a qualitative analysis of repeated iterations of semiotic data from board members (n = 30) and text analysis of organization mission statements (n = 21), generating thick description of board members’ understanding of effectiveness. The analysis revealed that strategies focused on developing reciprocity and mitigating mistrust among board members contributed to board members perceiving their organizations as effectively achieving their objectives. Application of the findings and conclusions, developed from the lived experiences of members of small nonprofit boards, contributes to social change among small American nonprofit organizations by suggesting means to address the stresses that compromise the availability and quality of their programs

“TO NURTURE SOMETHING THAT NURTURES YOU”: CARE, CREATIVITY, CLASS, AND THE PRODUCTION OF URBAN ENVIRONMENTS IN DEINDUSTRIAL MICHIGAN

In this dissertation I investigate how gardeners and beekeepers in a small, deindustrial city in Michigan used their activities to produce their environments. Drawing on fourteen months of ethnographic fieldwork, I consider what kind of labor gardening is. For residents of Elmwood, gardening was a way to care for households, communities, and ecosystems. Furthermore, this care was performed through a type of creative, material labor that served to address forms of alienation experienced by these individuals. While all sorts of Elmwoodites gardened, they did so in ways that were specific to their experiences of race and class. These experiences, in turn, were directly shaped by Elmwood’s particular history. Legacies of racial tolerance and discrimination, industrialization and the resulting in-migration of rural Southerners, and the differentiated impacts of deindustrialization have all contributed to the production of social and spatial inequalities based on differences of class and race. I thus examine the ways race- and class-based inequalities shape the kinds of environments gardeners produced through their caring, creative labor. Employing the lenses of social reproduction and environmental gentrification, I discuss the ways gardeners worked to address sociospatial inequalities, as well as they ways their practices maintained them. I conclude that while ongoing racial inequalities and processes of class formation present challenges to gardeners’ desires to produce nurturing multispecies environments, these desires also motivated gardeners to engage with the ways they were entangled with other human and nonhuman beings, engagements that present possibilities for producing more socially equitable and ecologically urban environments