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California experienced a severe multiyear drought stretching from 2011 through 2017, significantly reducing surface water supply for ecosystems, agriculture, and humans and prompting coordinated conservation efforts. Given that agriculture is the largest consumptive use of water in the state, one anticipated response to a severe drought would be to decrease production of low-value, high-water-use crops such as alfalfa. In this article we use a multimethod approach to examine both spatial distribution and public perceptions of alfalfa production in California over the course of the 2011 through 2017 drought. We find that although California alfalfa production did decline at the state level, it persisted and even increased in specific areas of the state. We also find that alfalfa persisted even though discourses and understandings that were critical of alfalfa production emerged in public forums during this time. We situate these findings within a broader context of California's water management system, which meant that in practice, infrastructure and water rights allocation practices left many growers with little incentive to change growing practices, even in the face of serious meteorological drought. [ABSTRACT FROM AUTHOR]

Hydrological droughts are important for agriculture and other human activities such as navigation and groundwater pumping, so it is necessary to understand their characteristics at various temporal and spatial scales. This study aims to examine the characteristics of hydrological droughts and their propagation from meteorological droughts across Wisconsin. Hydrological droughts were identified for twenty-four U.S. Geological Survey streamflow monitoring sites using the 20th percentile threshold level for each calendar day. Meteorological droughts were identified in the same way using daily precipitation data. Drought events of both types were identified for the period from 1980 to 2018, and the drought in 2012 was examined in detail. Our results indicate that (1) unlike meteorological droughts, hydrological droughts tend to occur more frequently in recent years; (2) characteristics of hydrological droughts are not correlated with those of meteorological droughts or annual precipitation; (3) there are generally three drought regions in Wisconsin showing different drought trends and propagation characteristics; and (4) groundwater withdrawal from unconfined aquifers has exacerbated hydrological droughts. In conclusion, hydrological droughts have become less synchronous with meteorological droughts, which will make drought early warning more challenging. The study sheds light on drought characteristics and propagation in relation to catchment characteristics and human activities. [ABSTRACT FROM AUTHOR]

Urban water security strategies commonly pivot around supply-side initiatives to mitigate scarcity, forecasted population growth, or anticipated climate change; yet, scholars have begun to expand urban water security scholarship by including alternative frameworks that incorporate equity into the analysis. Our study seeks to contribute to this equity turn by opening the investigative aperture on urban water security research in several aspects. We address the question of water security for whom, and turn our attention to the urban resident and household. We shift empirical focus to smaller urban centers in the Global South, and we develop a new assessment tool for water insecurity, the Household Water Insecurity Index (HWISI), to assess differences across the urban waterscape. We conducted this research in Forquilha (Ceará, Brazil), which represents an overlooked class of small urban centers common across Brazil's semiarid region. We draw on qualitative and quantitative data to describe household water insecurity using the HWISI. The prevalence of household water insecurity is variable, with a quarter of the population experiencing moderate to severe household water insecurity. In addition, analysis of the factors within the HWISI demonstrated how specific water insecurity domains push households across water insecurity thresholds. [ABSTRACT FROM AUTHOR]

The applicability of liberal governance models in authoritarian contexts has been widely debated. This study contributes to this debate by using a Foucauldian analytic of apparatuses of security to understand how Chinese state actors used the liberalization of agricultural markets to indirectly mitigate against the risk of droughts. Apparatuses of security, which rely on indirect governance through market and biopolitical mechanisms, were proposed by Foucault to explain the emergence of governmentality in liberal states. The Chinese state has been described as a system of fragmented authoritarianism, wherein state actors are isolated from and compete with one another. Food policy in the early People's Republic of China extended this isolation to the point of encouraging local autarky at the county level. Around the year 2000, local officials in northwest China began promoting the replacement of subsistence agriculture with drought-resistant commercial agriculture as a means of mitigating against drought. This shifted the source of risk of food shortfalls from an environmental risk of drought to a state-mediated market risk and displaced the long-standing model of local autarky providing food security. By illustrating the dynamics of how Chinese state actors govern nature through market mechanisms, this study contributes to theorizations of how liberalization can function to govern nature in authoritarian contexts. Key Words: apparatuses of security, China, drought, governmentality, water-food security. [ABSTRACT FROM AUTHOR]

Freshwater resources are particularly limited in the Southeastern United States. In recent years, severe summer droughts have placed substantial strain on municipal and industrial water resources, emphasizing the need for further research on the causes of long-term moisture deficits. Previous research has identified a Southeast drought region and specific low-frequency ocean-atmosphere influences on drought. In this article, we identify three distinct subregions of low-frequency summer drought variability in the Southeastern United States using principal components analysis. Multidecadal drought variability is most pronounced in the Southeastern Atlantic Coastal States (SEACS) subregion. The SEACS drought variability is significantly associated with ocean-atmosphere variability in the Atlantic and Pacific basins. The significance of ocean-atmosphere influences on drought in the Southeast is spatially confined within only the SEACS subregion. The Eastern Gulf States (EGS) subregion exhibits a long-term increase in summer moisture that is significantly associated with Northern Hemisphere surface temperature increases during the last century. The peninsular Florida subregion is characterized by high-frequency drought variability that is not associated with any of the climate indexes included in this study. [ABSTRACT FROM AUTHOR]

This study revisits, updates, and evaluates the climatological isentropic analysis method pioneered by Jerome Namias in the 1930s. Early researchers including Namias noted many advantages to the use of constant potential temperature surfaces, or isentropic analysis, over constant pressure charts (e.g., barometric heights) but aviation needs for constant pressure charts caused climatological isentropic research to wane after World War II. We employ modern data to verify and update Namias's original identification of the North American monsoon. Given this verification, we extend his analyses to other seasons. Importantly, we identify a springtime prominent “isentropic inverted wave” over the Great Plains that corresponds to severe storm and tornadic activity. We also verify isentropic analysis in the detection of drought using modern drought indexes. Fundamentally, we demonstrate that Namias's climatological isentropic analysis is still notably applicable to climate forecasting concerns. In a larger perspective, we demonstrate the usefulness of reexamining past research in the context of new data and methods. [ABSTRACT FROM PUBLISHER]

It is now widely agreed that there is more to sustainable consumption than persuading individuals to make green their brand of choice. Instead, the focus is on how to understand the processes of change, particularly in relation to the transformation of inconspicuous habits. A dominant approach within sustainable consumption research suggests that changing embedded habits and practices requires making them visible and subject to overt decision-making and discussion. An alternative practice-based perspective suggests that enduring change emerges through the amplification of existing social orientations and does not necessarily depend upon explicit contestation and debate. We examine these positions with reference to a detailed study of changing outdoor domestic water consumption habits during the 2006 drought in south-east England. Our analysis of variable responses to the hosepipe ban leads us to suggest that the manner in which disruption generates change in consumption practices is mediated by pre-existing social orientations and by diverse configurations of garden infrastructures and water institutions. [ABSTRACT FROM AUTHOR]

An increasing body of research shows that climate change takes expression in local processes such as increased climatic variability; climatic risk is managed in relation to other risks in agricultural households; and adaptation is an everyday social process as much as a question of new crop varieties. Understanding how farming households experience the interactions of climatic variability, multifaceted risk, adaptation, and everyday social processes is crucial to informed policy development. A study of New South Wales wheat farming households during the failed harvest seasons of 2006-2007 and 2007-2008 provided a unique opportunity to examine how they approached unprecedented drought in relation to both past and future changes. We analyzed their experience of the hybrid assemblage comprising risk, climate change, and a deregulated policy environment in their everyday lives and individual bodies. These farmers are not adapting to future conditions but are in continuous interplay among multiple temporalities, including memories of the past. They see themselves as adapting in situ rather than relocating northwards with predicted rainfall movements. Capacities to deal with risk and uncertainty vary with a range of social and locational factors, tending to coalesce into patterns of vulnerability and resilience that offer strong predictors as to which households are most likely to be sustainable in the longer term. [ABSTRACT FROM AUTHOR]

We examined changes in and relationships between radial growth and intrinsic water-use efficiency (iWUE) of ponderosa pine (Pinus ponderosa) trees, climate, and atmospheric CO2 in the western United States since the mid-nineteenth century. We developed tree-ring chronologies for eight sites in three climate regions and used carbon isotope data to calculate pentadal values of iWUE. We examined relationships among radial growth, climate, iWUE, and CO2 via correlation and regression analyses. Significant upward trends in iWUE occurred at all sites, and despite an absence of climate changes that would favor growth, upward radial growth trends occurred at five sites. Our findings suggest that increased iWUE associated with rising CO2 can positively impact tree growth rates in the western United States and are thus an evolving component of forest ecosystem processes. [ABSTRACT FROM AUTHOR]

Water, already a scarce resource in the semiarid Western United States, has become increasingly threatened due to population growth pressures, natural climate variability, and the prospect of future climate change. Water managers are challenged by uncertainties concerning how climate variability and change interact with water supply at the regional level. This study aims to increase predictive capacity in one of the largest river systems in the Western United States, the Snake River, by identifying key atmosphere-ocean controls on streamflow and assessing how projected climate changes will translate into future water supply in the river. In contrast to previous research suggesting the Snake headwaters are in an area of weak teleconnection influence, the results of this study indicate that the region exhibits a response to El Nino-Southern Oscillation (ENSO) that is similar to the Pacific Northwest and strongly modulated by northern Pacific conditions. Although current projections of how dynamic features like ENSO might respond to climate change are highly uncertain, the lagged nature of the relationship between Pacific Ocean conditions and streamflow will be useful for near-term planning. The region was found to be sensitive to shifts in the winter westerly storm track system, with extreme low-flow years associated with a north-shifted storm track. Precipitation increases have been projected for the region, but other predicted consequences of climate change—including a poleward shift in storm track position, changing seasonality, and reduced snowpack—suggest an increased likelihood of future drought conditions. [ABSTRACT FROM AUTHOR]

Early summer snowmelt from mountains in northern Colorado and southeastern Wyoming supplies the North Platte River, supporting nationally important agriculture, energy production, and urban development. Repeated decisions from the U.S. Supreme Court have fully apportioned Platte River waters among Colorado, Wyoming, and Nebraska, underscoring societal strains on this system. Now, climate change threatens the regional allocation of water. Tree-ring records indicate that past centuries contained multidecadal “megadroughts” far more severe than those of the historic period. However, the potential for even more persistent droughts, as the result of climate change, is poorly known. We document and evaluate the severity of recent and prehistoric droughts via a combination of data sources: modern temperature, precipitation, and stream gauge data; evidence of low lake-level stands; and related estimates of past hydroclimate change. Modern climate and stream data show an increase in spring temperatures of 2.21°C since 1916, an increase in the frequency of peak spring runoff before 1 May, and a reduction in winter precipitation. Lakes, however, that have only experienced minor hydrologic changes historically were desiccated during prehistoric dry periods during the past 12,000 years. Prehistoric lake shorelines indicate that water supplies were substantially reduced over centuries and millennia, such as from > 8,000 to < 5,000 years before present. The magnitude of these droughts likely also resulted in ephemeral river flows and thus indicates the potential for persistent shifts in regional hydrology. Such shifts should, therefore, be considered as part of long-term economic and legal planning. [ABSTRACT FROM AUTHOR]

The purpose of this study is to reach a basic understanding of drought and climate change in southwestern Jamaica through an integration of local knowledge and perception of drought and its physical characteristics manifested in remotely sensed precipitation and vegetation data. Local knowledge and perception are investigated through a survey of sixty farmers in St. Elizabeth Parish and physical characteristics of drought are examined through statistical analysis of satellite precipitation and vegetation vigor time series. The survey indicates that most farmers are concerned about an increase in drought occurrence. Satellite estimates of rainfall and vegetation vigor for St. Elizabeth Parish support this perception and suggest that severe drought events are becoming more frequent. The satellite precipitation time series also suggest that the early growing season is becoming drier as compared to the primary growing season, especially since 1991. This recent divergence in growing season moisture conditions might add to farmers' observations that drought is becoming more prevalent. Consequently, Jamaican farmers perceptions of drought are not driven by magnitude and frequency of dry months alone but rather by the difference between growing seasons. Any development of drought adaption and mitigation plans for this area must not focus solely on drought; it must also compare moisture conditions between months and seasons to be effective. [ABSTRACT FROM AUTHOR]

Livestock mobility facilitates opportunistic grazing management strategies that pastoralists employ to counter environmental variability in rangelands. One such strategy is moving livestock to temporary camps that are closer to areas of underutilized forage during times of drought. In areas where pastoralists graze near large protected areas, movement into protected areas, where both forage quantity and quality are higher, is also a common strategy. The aim of this study is to test hypotheses of herd relocation and effects of seasonality and herd size on spatially explicit parameters of cattle mobility for Maasai pastoralists along the northern border of a protected area in Kenya. Modified Global Positioning System (GPS) collars were placed on cattle from ten Maasai households that recorded three parameters of mobility for hundreds of grazing orbits from August 2005 to August 2006. Data were grouped by two constraints—seasonality and herd size—and tested against the two types of enclosure locations (temporary camps and permanent settlements). Hypotheses were formed on the basis of the current knowledge within the literature and analyzed using a series of analyses of variance. Results suggest that household relocation reduces the stress faced by pastoralists and their cattle during the drought by (1) lowering the average total daily distance and time traveled by cattle, (2) directing cattle toward the protected area, and (3) concentrating cattle grazing in distinct areas within the protected area. Herd size was found to have no effect on duration of travel for pastoralists that choose not to relocate during the drought. The research demonstrates how the use of modified low-cost GPS collars can be an effective tool for capturing parameters of mobility and for inferring pastoralist-livestock-rangeland relationships. [ABSTRACT FROM AUTHOR]

Research into diverse cultural understandings of water provides important contributions to the pressing global issue of sustainable supply, particularly when combined with analysis of relationships between everyday household practice and larger sociotechnical networks of storage and distribution. Here we analyse semi-structured interviews with 298 people about their 241 backyards in the Australian east coast cities of Sydney and Wollongong, undertaken during the 2002-2003 drought. Water emerged as an important issue in both consciousness and practice. In contrast to a number of other environmental issues which stimulate more polarised responses, a commitment to reducing water consumption was shared across the study population and manifest in a variety of changed practices. However, these aspirations are in tension with the pleasure derived from water, and expressed desires for more watery environments. This work contrasts with and extends other studies that have emphasised the perceived separation between the modern home and the networks of production that sustain it. We argue that it is in the relationship between house and garden that people see, understand and participate in the network of water storage and distribution. Their active engagement with these processes enhances their capacity to manage and reduce consumption. [ABSTRACT FROM AUTHOR]