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: Food & Water Issues
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
30 June 2016, NASA. Why a half-degree temperature rise is a big deal. The Paris Agreement, which delegates from 196 countries hammered out in December 2015, calls for holding the ongoing rise in global average temperature to “well below 2 °C above pre-industrial levels,” while “pursuing efforts to limit the temperature increase to 1.5 °C.” How much difference could that half-degree of wiggle room (or 0.9 degree on the Fahrenheit scale) possibly make in the real world? Quite a bit, it appears. The European Geosciences Union published a study in April 2016 that examined the impact of a 1.5 degree Celsius vs. a 2.0 C temperature increase by the end of the century, given what we know so far about how climate works. It found that the jump from 1.5 to 2 degrees—a third more of an increase—raises the impact by about that same fraction, very roughly, on most of the phenomena the study covered. Heat waves would last around a third longer, rain storms would be about a third more intense, the increase in sea level would be approximately that much higher and the percentage of tropical coral reefs at risk of severe degradation would be roughly that much greater. But in some cases, that extra increase in temperature makes things much more dire. At 1.5 C, the study found that tropical coral reefs stand a chance of adapting and reversing a portion of their die-off in the last half of the century. But at 2 C, the chance of recovery vanishes. Tropical corals are virtually wiped out by the year 2100. Read More here
20 May 2016, Independent, Farmer suicides soar in India as deadly heatwave hits 51 degrees Celsius. Sweltering country seeks the relief of the monsoon, but this year’s downpour could be up to 11 days late as officials blame climate change. India has set a new record for its highest-ever recorded temperature – a searing 51 degrees Celsius or 123.8F – amid a devastating heatwave that has ravaged much of the country for weeks. Hundreds of people have died as crops have withered in the fields in more than 13 states, forcing tens of thousands of small farmers to abandon their land and move into the cities.Others have killed themselves rather than go to live in urban shanty towns. Rivers, lakes and dams have dried up in many parts of the western states of Rajasthan, Maharashtra and Gujarat. India’s previous record high was 50.6C (123 F), which was set in 1956 in the city of Alwar, also in Rajasthan. The world record temperature is 56.7C, which was recorded in July 1913, in Death Valley, California. Human body temperature is normally 37C. The India Meteorological Department (IMD) warned that heatwave conditions were expected to continue for much of the next week in parts of central and north-west India, interspersed with dust and thunder storms in places. Dr Laxman Singh Rathore, the IMD’s director general, firmly pinned the blame for the rising temperatures on climate change, noting the trend dated back about 15 years. “It has been observed that since 2001, places in northern India, especially in Rajasthan, are witnessing a rising temperature trend every year,” he said in a statement. “The main reason is the excessive use of energy and emission of carbon dioxide. “Factors like urbanization and industrialization too have added to the global warming phenomenon. I think similar trend would be maintained in Rajasthan in coming days.” Read More here