19 August 2016, Washington Post, ‘Climate change is water change’ — why the Colorado River system is headed for major trouble. There’s good news and bad news for the drought-stricken Colorado River system, according to projections just released in a new federal report from the Bureau of Reclamation, manager of dams, power plants and canals. The report predicts that Lake Mead — the river system’s largest reservoir, supplying water to millions of people in Nevada, Arizona, California and Mexico — will narrowly escape a shortage declaration next year. But a shortage is looking imminent in 2018, and water experts are growing ever more worried about the river system’s future. The Colorado River basin has been plagued with drought for 15 years now, and the effects are starting to show. Earlier this spring, Lake Mead — which feeds 90 percent of the water supply in Las Vegas, alone — dropped to its lowest levels since the Hoover Dam was completed in 1936. In fact, the last time the lake was at full capacity, with water levels 1,225 feet above sea level, was in 1983. Since then, and particularly since the year 2000, its surface levels have been steadily dropping, leaving behind a striking white “bathtub ring” around the shoreline showing how the water levels have decreased over the years. Currently, demand on Lake Mead has been removing more water than is being replenished, resulting in a deficit of about 1.2 million acre-feet, or about 400 billion gallons, each year. According to federal guidelines, a shortage is to be declared at the start of any given year if Lake Mead’s water levels have sunk below 1,075 feet above sea level. The new federal projections, spanning the next 24 months, suggest that the elevation will be hovering just below 1,079 feet at the end of this December. Read More here
Category Archives: Ecosystem Stress
1 August 2016, Climate Home, UN asked Australia to cover up Great Barrier Reef lobbying. The UN asked the Australian government to cover up details of lobbying that lead to all mention of Australia being scrubbed from a major report on climate threats to world heritage sites. A draft of the UNESCO report, containing details of the threats posed by climate change to the Great Barrier Reef, Kakadu and the Tasmanian wilderness, was sent to Australia’s ambassador to UNESCO George Mina in February. Mina forwarded it to the Environment Department for comment. Several emails were exchanged with UNESCO officials. The report was published in May without any mention of Australian sites. The doctoring was revealed by the Guardian in May, leading to global concern and outrage over the apparent ability for a government to influence the UN body’s scientific reporting. Correspondence between Mina, staff at UNESCO’s World Heritage Centre and the Department of Environment was released to Climate Home after a Freedom of Information (FoI) request. But the documents were almost entirely blacked out at UNESCO’s behest. Deb Callister, an environment department official, told Climate Home that she had consulted with UNESCO about releasing the emails that lead to the removal of the Australian sections. “UNESCO advised that it is their practice not to disclose exchanges of letters or correspondence between the Secretariat and its Member States, and requested that this type of material not be disclosed pursuant to this FOI request,” said Callister. Read More here
20 July 2016, Climate News Network, Humans play high-risk ecological roulette. Analysis of millions of records by thousands of scientists across the world shows that human impacts have helped push the planet’s vital biodiversity into the danger zone. Humans have reduced biodiversity – the teeming variety of plant and animal life that competes and co-operates in every ecosystem – tobelow safe levels across more than 58% of the planet’s land surface. This is ultimately bad news for human food security because biological diversity underwrites what naturalists call the resilient ecosystem services on which humans and all higher animals depend – crop pollination and pest control, nutrient decomposition and recycling, water and air purification − and because that 58% of the terrestrial planet is home to 71% of all humans, That humans are reducing biodiversity − and at a cost to the disturbed ecosystems − is not news. Separate research teams have repeatedly warned of thedangers of extinction of species. Biggest picture But Tim Newbold, a bioscience research associate at University College London, and colleagues report in Science journal that instead of drawing conclusions from one or a series of studies, they looked at the biggest picture available. The research, which is part of a British partnership study called PREDICTS, analysed 2.38 million records made by other scientists of 39,123 species at 18,659 places. Read More here
19 July 2016, Climate News Network, Climate change’s costs are still escalating. Scientific reports released for a conference today on disaster risk reduction warn that people are already dying and economies being hit by climate change − and that the dangers are growing. The massive economic and health losses that climate change is already causing across the world are detailed in six scientific papers published today. Perhaps most striking is the warning about large productivity losses already being experienced due to heat stress, which can already be calculated for 43 countries. The paper estimates that in South-East Asia alone “as much as 15% to 20% of annual work hours may already be lost in heat-exposed jobs”. And that figure may double by 2030 as the planet continues warming − with poor manual labourers who work outdoors being the worst affected. The release of the papers coincides with the start of a conference on disaster risk reduction, held in the Malaysian capital, Kuala Lumpur, and jointly sponsored by the International Institute for Global Health (UNU-IIGH) and the UN Development Programme. The aim is to alert delegates to the already pressing scale of the problem and the need to take measures to protect the health of people, and to outline the economic costs of not taking action. Read More here