Made available through Montana State University's ScholarWorks 2543 DECEMBER 2017 AMERICAN METEOROLOGICAL SOCIETY | THE RISING RISK OF DROUGHT. Droughts of the twenty-first century are characterized by hotter temperatures, longer duration, and greater spatial extent, and are increasingly exacerbated by human demands for water. This situation increases the vulnerability of ecosystems to drought, including a rise in drought-driven tree mortality globally (Allen et al. 2015) and anticipated ecosystem transformations from one state to another-for example, forest to a shrubland (Jiang et al. 2013). When a drought drives changes within ecosystems, there can be a ripple effect through human communities that depend on those ecosystems for critical goods and services (Millar and Stephenson 2015). For example, the "Millennium Drought" in Australia caused unanticipated losses to key services provided by hydrological ecosystems in the Murray-Darling basin-including air quality regulation, waste treatment, erosion prevention, and recreation. The costs of these losses exceeded AUD $800 million, as resources were spent to replace these services and adapt to new drought-impacted ecosystems (Banerjee et al. 2013). Despite the high costs to both nature and people, current drought research, management, and policy perspectives often fail to evaluate how drought affects ecosystems and the "natural capital" they provide to human communities. Integrating these human and natural dimensions of drought is an essential step toward addressing the rising risk of drought in the twenty-first century.Part of the problem is that existing drought definitions describing meteorological drought impacts (agricultural, hydrological, and socioeconomic) view drought through a human-centric lens and do not fully address the ecological dimensions of drought.
The spatial and human dimensions of climate change are brought into relief at international borders where climate change poses particular challenges. This article explores "double exposure" to climatic and globalization processes for the U.S.-Mexico border region, where rapid urbanization, industrialization, and agricultural intensification result in vulnerability to water scarcity as the primary climate change concern. For portions of the western border within the North American monsoon climate regime, the Intergovernmental Panel on Climate Change projects temperature increases of 2 to 4 • C by midcentury and up to 3 to 5 • C by 2100, with possible decreases of 5 to 8 percent in precipitation. Like the climate and water drivers themselves, proposed societal responses can also be regionalized across borders. Nevertheless, binational responses are confronted by a complex institutional landscape. The coproduction of science and policy must be situated in the context of competing institutional jurisdictions and legitimacy claims. Adaptation to climate change is conventionally understood as more difficult at international borders, yet regionalizing adaptive responses could also potentially increase resilience. We assess three cases of transboundary collaboration in the Arizona-Sonora region based on specific indicators that contribute importantly to building adaptive capacity. We conclude that three key factors can increase resilience over the long term: shared social learning, the formation of binational "communities of practice" among water managers or disaster-relief planners, and the coproduction of climate knowledge. Key Words: adaptive capacity, climate change, U.S.-Mexico border, vulnerability, water.Las dimensiones espaciales y humanas del cambio climático se hacen particularmente relevantes en las fronteras internacionales, lugares donde el cambio climático genera retos especiales. Este artículo explora la "doble exposición" de los procesos climáticos y globalizadores para la región fronteriza EE.UU.-México, donde la rápida urbanización, industrialización e intensificación agrícola resultan en vulnerabilidad por escasez de agua, como la preopcupación primaria por el cambio climático. En porciones de la frontera occidental ubicada dentro del régimen climático del monzón norteamericano, el Panel Intergubernamental de Cambio Climático proyecta incrementos de las temperaturas de 2 • a 4 • C para mediados de siglo y de hasta 3 • a 5 • C para el 2100, junto con una posible disminución de la precipitación de 5 al 8 por ciento. De la misma manera que ocurre con lo concerniente a clima y agua, las respuestas sociales que se proponen también pueden regionalizarse a través de las fronteras. Sin embargo, las respuestas binacionales se ven confrontadas con un paisaje institucional complejo. La coproducción de ciencia y políticas debe situarse en el
Incorporation of concepts from landscape ecology into understanding and managing riverine ecosystems has become widely known as riverscape ecology. Riverscape ecology emphasizes interactions among processes at different scales and their consequences for valued ecosystem components, such as riverine fishes. Past studies have focused strongly on understanding the ecological processes in riverscapes and how human actions modify those processes. It is increasingly clear, however, that an understanding of the drivers behind actions that lead to human modification also merit consideration, especially regarding how those drivers influence management efficacy. These indirect drivers of riverscape outcomes can be understood in the context of a diverse array of social processes, which we collectively refer to as human dimensions. Like ecological phenomena, social processes also exhibit complex interactions across spatiotemporal scales. Greater emphasis on feedbacks between social and ecological processes will lead scientists and managers to more completely understand riverscapes as complex, dynamic, interacting social–ecological systems. Emerging applications in riverscapes, as well as studies of other ecosystems, provide examples that can lead to stronger integration of social and ecological science. We argue that conservation successes within riverscapes may not come from better ecological science, improved ecosystem service analyses, or even economic incentives if the fundamental drivers of human behaviors are not understood and addressed in conservation planning and implementation. This article is categorized under: Water and Life > Stresses and Pressures on Ecosystems Human Water > Water Governance Engineering Water > Planning Water
Based on research conducted in a migrant-sending community in south-eastern Mexico, we find that male out-migration has forced women to take on labour tasks that are associated with new spatial and mobility patterns. While these patterns have potential for increased empowerment for women, they also call the women's morality into question, resulting in a policing of the women's behaviour, and a simultaneous restriction of their mobility, by themselves and others. Therefore, we find male labour out-migration has resulted in contradictory changes in women's mobility, with ambiguous results for women's gender empowerment.
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