The heat is on: climate change, extreme heat and bushfires in WA

Climate change is increasing the intensity and frequency of heatwaves in Western Australia and driving up the likelihood of very high fire danger weather. Western Australia is experiencing a long-term increase in average temperatures and in 2014 the state recorded its highest ever annual average maximum temperature. The number of heatwave days in Perth has increased by 50% since 1950. Nine of Western Australia’s hottest Januarys on record have occurred in the last 10 years. The number of days per year with severe fire danger weather is projected to almost double in south west Western Australia by 2090 if global carbon emissions are not drastically reduced. Recent fires in Western Australia have been influenced by record hot dry conditions. The long-term trend to hotter weather in Western Australia has worsened fire weather and contributed to an increase in the frequency and severity of bushfires. The concept of a normal bushfire season is rapidly changing as bushfires increase in number, burn for longer and affect larger areas of land. By 2030, the number of professional firefighters in WA will need to more than double to meet the increasing risk of bushfires. 3. The economic, social and environmental costs of increased extreme heat and bushfire activity is likely to be immense. In Perth, from 1994-2006, there were over 20 heat attributable deaths per year. If average maximum temperatures were 2°C warmer, this number would almost double to 40 deaths. Some of Western Australia’s most fire-prone regions may become unlivable as the risks to lives and property caused by bushfires continue to increase. Without effective action on climate change, there will be 20 times the number of dangerous days for outdoor workers by 2070, reducing productivity. 4. Tackling climate change is critical to protecting Western Australia’s prosperity. As a nation we must join the global effort to substantially reduce emissions and rapidly move away from fossil fuels to renewable energy if we are to limit the severity of extreme heat and bushfires both in Western Australia and nationally

Himalayan Dreaming

How did climbers from the world’s flattest, hottest continent become world-class Himalayan mountaineers, the equal of any elite mountaineer from countries with long climbing traditions and home ranges that make Australia’s highest summit look like a suburban hill? This book tells the story of Australian mountaineering in the great ranges of Asia, from the exploits of a brash, young colonial with an early British Himalayan expedition in the 1920s to the coming of age of Australian climbers in the 1980s. The story goes beyond the two remarkable Australian ascents of Mt Everest in 1984 and 1988 to explore the exploits of Australian climbers in the far-flung corners of the high Himalaya. Above all, the book presents a glimpse into the lives – the successes, failures, tragedies, motivations, fears, conflicts, humor, and compassion – themselves to the ultimate limits of survival in the most spectacular and demanding mountain arena of all

Finance and the Earth system – exploring the links between financial actors and non-linear changes in the climate system

Financial actors and capital play a key role in extractive economic activities around the world, as well as in current efforts to avoid dangerous climate change. Here, in contrast to standard approaches in finance, sustainability and climate change, we elaborate in what ways financial actors affect key biomes around the world, and through this known "tipping elements" in the Earth system. We combine Earth system and sustainability sciences with corporate finance to develop a methodology that allows us to link financial actors to economic activities modifying biomes of key importance for stabilizing Earth's climate system. Our analysis of key owners of companies operating in the Amazon rainforest (Brazil) and boreal forests (Russia and Canada) identifies a small set of international financial actors with considerable, but as of yet unrealized, globally spanning influence. We denote these "Financial Giants", and elaborate how incentives and disincentives currently influence their potential to bolster or undermine the stability of the Earth's climate system

Unifying cosmological and recent time variations of fundamental couplings

A number of positive and null results on the time variation of fundamental constants have been reported. It is difficult to judge whether or not these claims are mutually consistent, since the observable quantities depend on several parameters, namely the coupling strengths and masses of particles. The evolution of these coupling-parameters over cosmological history is also a priori unknown. A direct comparison requires a relation between the couplings. We explore several distinct scenarios based on unification of gauge couplings, providing a representative (though not exhaustive) sample of such relations. For each scenario we obtain a characteristic time dependence and discuss whether a monotonic time evolution is allowed. For all scenarios, some contradictions between different observations appear. We show how a clear observational determination of non-zero variations would test the dominant mechanism of varying couplings within unified theories.Comment: Formatting changes and minor typos, equivalent to published version. 35 pages (11pt article format), 8 figure

Cosmology of Chameleons with Power-Law Couplings

In chameleon field theories a scalar field can couple to matter with gravitational strength and still evade local gravity constraints due to a combination of self-interactions and the couplings to matter. Originally, these theories were proposed with a constant coupling to matter, however, the chameleon mechanism also extends to the case where the coupling becomes field-dependent. We study the cosmology of chameleon models with power-law couplings and power-law potentials. It is found that these generalized chameleons, when viable, have a background expansion very close to LCDM, but can in some special cases enhance the growth of the linear perturbations at low redshifts. For the models we consider it is found that this region of the parameter space is ruled out by local gravity constraints. Imposing a coupling to dark matter only, the local constraints are avoided, and it is possible to have observable signatures on the linear matter perturbations.Comment: 12 pages, 5 figures. ApJ in prin

EDS integrated approach for sustainability (EDS-IA) : campus as a living laboratory experience

Since 2016, InstitutEDSisdevelopinga new integrated approachto facilitatecollaborationsbetween different disciplines and to reinforce the developmentofpractical skills and key competencies needed tosolve concrete sustainable development problems: the EDS-IA. It aims to contribute to theacceleration ofthetransition to a closed and cyclic development system, building on the most recent knowledge mobilization frameworks in the field: the concept of Planetary Boundaries,the concept of Social Floor,the Sustainable Development Goals, Key Competencies in Sustainability and Multilevel Governance. Despite the broad consensus and the robustness of the scientific knowledge underlying all these frameworks, they are not sufficiently known beyond their own field of knowledge. In order to facilitate their diffusion and their appropriation by all the disciplines and actors concerned with the transition to sustainability, EDS-IA integrates themin a diagram as a tool that can be adapted todifferent development challenge in different contexts. During itsfirst year of implementation (2016-2017), researchers and student members of the Instituteparticipated in a series of major co-creation activitiesalong withstaff university members, governmental organizations as well as representatives of civil society. They made a diagnosisof the sustainable status of the campus and imaginedinnovating solutions for a “Campus as a living laboratory” through operations, teaching, research, and community services. In the second year (2017-2018), the transfer of the EDS-IA started through similar workshops with a university partner in Senegal(UADB). This paper presents the theoretical and methodological frameworksof the EDS-IAand the results of the first two years during which universities have been imagined as living laboratories for SDG promotion and implementation.