1,635 research outputs found

    Coupling the Biophysical and Social Dimensions of Wildfire Risk to Improve Wildfire Mitigation Planning

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    Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/113114/1/risa12373.pd

    Social and Cultural Influences on Management for Carbon Sequestration on US Family Forestlands: A Literature Synthesis

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    Nonindustrial private-or "family"-forests hold great potential for sequestering carbon and have received much attention in discussions about forestry-based climate change mitigation. However, little is known about social and cultural influences on owners' willingness to manage for carbon and respond to policies designed to encourage carbon-oriented management. We review the published literature to examine how family forest owners' values, ecological knowledge, risk perceptions, and forest management and policy preferences may affect their interest in managing for carbon sequestration. We find that although family forest owners may not be particularly motivated to mitigate climate change, their forest management values and practices compliment many carbon-oriented management strategies. However, the strong value owners place on privacy and autonomy, and the weak importance many place on financial reward, may inhibit participation in policies and programs that incentivize carbonoriented management. These findings also have implications for policy efforts to encourage management for other ecological values besides carbon sequestration on family forestlands

    Numerical Methods for the QCD Overlap Operator: I. Sign-Function and Error Bounds

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    The numerical and computational aspects of the overlap formalism in lattice quantum chromodynamics are extremely demanding due to a matrix-vector product that involves the sign function of the hermitian Wilson matrix. In this paper we investigate several methods to compute the product of the matrix sign-function with a vector, in particular Lanczos based methods and partial fraction expansion methods. Our goal is two-fold: we give realistic comparisons between known methods together with novel approaches and we present error bounds which allow to guarantee a given accuracy when terminating the Lanczos method and the multishift-CG solver, applied within the partial fraction expansion methods.Comment: 30 pages, 2 figure

    Wildfire Risk as a Socioecological Pathology

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    Wildfire risk in temperate forests has become a nearly intractable problem that can be characterized as a socioecological “pathology”: that is, a set of complex and problematic interactions among social and ecological systems across multiple spatial and temporal scales. Assessments of wildfire risk could benefit from recognizing and accounting for these interactions in terms of socioecological systems, also known as coupled natural and human systems (CNHS). We characterize the primary social and ecological dimensions of the wildfire risk pathology, paying particular attention to the governance system around wildfire risk, and suggest strategies to mitigate the pathology through innovative planning approaches, analytical tools, and policies. We caution that even with a clear understanding of the problem and possible solutions, the system by which human actors govern fire-prone forests may evolve incrementally in imperfect ways and can be expected to resist change even as we learn better ways to manage CNHS
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