Land-use and sustainability under intersecting global change and domestic policy scenarios: trajectories for Australia to 2050

Understanding potential future influence of environmental, economic, and social drivers on land-use and sustainability is critical for guiding strategic decisions that can help nations adapt to change, anticipate opportunities, and cope with surprises. Using the Land-Use Trade-Offs (LUTO) model, we undertook a comprehensive, detailed, integrated, and quantitative scenario analysis of land-use and sustainability for Australia’s agricultural land from 2013–2050, under interacting global change and domestic policies, and considering key uncertainties. We assessed land use competition between multiple land-uses and assessed the sustainability of economic returns and ecosystem services at high spatial (1.1 km grid cells) and temporal (annual) resolution. We found substantial potential for land-use transition from agriculture to carbon plantings, environmental plantings, and biofuels cropping under certain scenarios, with impacts on the sustainability of economic returns and ecosystem services including food/fibre production, emissions abatement, water resource use, biodiversity services, and energy production. However, the type, magnitude, timing, and location of land-use responses and their impacts were highly dependent on scenario parameter assumptions including global outlook and emissions abatement effort, domestic land-use policy settings, land-use change adoption behaviour, productivity growth, and capacity constraints. With strong global abatement incentives complemented by biodiversity-focussed domestic land-use policy, land-use responses can substantially increase and diversify economic returns to land and produce a much wider range of ecosystem services such as emissions abatement, biodiversity, and energy, without major impacts on agricultural production. However, better governance is needed for managing potentially significant water resource impacts. The results have wide-ranging implications for land-use and sustainability policy and governance at global and domestic scales and can inform strategic thinking and decision-making about land-use and sustainability in Australia. A comprehensive and freely available 26 GB data pack (http://doi.org/10.4225/08/5604A2E8A00CC) provides a unique resource for further research. As similarly nuanced transformational change is also possible elsewhere, our template for comprehensive, integrated, quantitative, and high resolution scenario analysis can support other nations in strategic thinking and decision-making to prepare for an uncertain future

The neutron and its role in cosmology and particle physics

Experiments with cold and ultracold neutrons have reached a level of precision such that problems far beyond the scale of the present Standard Model of particle physics become accessible to experimental investigation. Due to the close links between particle physics and cosmology, these studies also permit a deep look into the very first instances of our universe. First addressed in this article, both in theory and experiment, is the problem of baryogenesis ... The question how baryogenesis could have happened is open to experimental tests, and it turns out that this problem can be curbed by the very stringent limits on an electric dipole moment of the neutron, a quantity that also has deep implications for particle physics. Then we discuss the recent spectacular observation of neutron quantization in the earth's gravitational field and of resonance transitions between such gravitational energy states. These measurements, together with new evaluations of neutron scattering data, set new constraints on deviations from Newton's gravitational law at the picometer scale. Such deviations are predicted in modern theories with extra-dimensions that propose unification of the Planck scale with the scale of the Standard Model ... Another main topic is the weak-interaction parameters in various fields of physics and astrophysics that must all be derived from measured neutron decay data. Up to now, about 10 different neutron decay observables have been measured, much more than needed in the electroweak Standard Model. This allows various precise tests for new physics beyond the Standard Model, competing with or surpassing similar tests at high-energy. The review ends with a discussion of neutron and nuclear data required in the synthesis of the elements during the "first three minutes" and later on in stellar nucleosynthesis.Comment: 91 pages, 30 figures, accepted by Reviews of Modern Physic

Agricultural transition and land-use change:Considerations in the development of irrigated enterprises in the rangelands of northern Australia

The factors affecting the adoption of irrigation by landholders, using a case study of a government-managed irrigation water release in north-west Queensland, Australia, where current land use is dominated by extensive beef-cattle production, were investigated. The study was based on multiple data sources - interview data from family-owned agricultural enterprises, historical and contemporary documents and contemporary media analysis, workshop participation and field work. The study revealed multiple drivers and constraints, which affect the rate, timing and location of adoption of irrigation by family-owned grazing enterprises. The key finding was that there are individual, group and regional interests in irrigation development but that considerable social and individual learning is required for adoption of irrigation to occur. It was found that there is a prominent role for knowledge brokers - as individuals, irrigator groups, and trusted brokers of science information - in facilitating learning and change. An insight, relevant to governments that support irrigation developments is that interventions that aid and support learning can play a role in facilitating the land-use transition for individual grazing properties to irrigated agriculture

What is shaping vulnerability to climate change? The case of Laamu atoll, Maldives

As climate change accelerates, it brings with it numerous challenges to society and the natural world. Concepts such as vulnerability have emerged as a way of trying to understand people’s risk, despite there being a range of variables that can influence vulnerability and its temporal and spatial dimensions. Drawing from the well-known conceptualisation of vulnerability as a function of exposure, sensitivity, and adaptive capacity, this paper seeks to understand what variables are influencing and shaping vulnerability in Laamu Atoll, the Maldives, and produce a base of knowledge for future vulnerability reduction initiatives. Household questionnaires (n=412) were used on Laamu Atoll to ascertain locals’ perceptions of vulnerability based on livelihood resources, financial security, and climate-change experiences. Results show that peripherality, as a notion that describes the disparities between ‘core’ and ‘peripheral’ islands, is a key factor shaping vulnerability variables on Laamu Atoll. This has prompted an overarching recommendation for peripherality to be considered as a key dimension of vulnerability to climate change and an important consideration for existing and future human development and climate change policy and practice in Small Island Developing States