What you will find on this page: how climate change shapes food insecurity (video); Weather Alert: 4 Corners program (video); About time we got over the “yuk” factor for recycled water (video); Farmers for Climate Action (video); Cool Farm Tool online calulator; Australia’s future food security; WRI Challenge; UNEP summary; BOM water sites: Australia’s water challenge; climate drivers; understanding ENSO (video); groundwater use; water futures; water trading; agriculture; food & water crisis; localising food production; complex food distribution; land use – agriculture & forestry; latest news; also refer to page “impacts observed & projected” as the issues are closely related
Latest News 10 May 2017, Renew Economy, Turnbull abandons fig leaf and stands naked on climate policy. You would think that with all the hoo-ha about the scandalous increases in electricity prices that it would have rated some sort of mention in the budget. You know, one of the biggest cost inputs for business being addressed in the government’s economic centrepiece. But no. The 2nd Morrison/Turnbull fiscal document blithely ignores the issue, despite the fact that their lack of policy direction in the last few years has been the major contributor to the price surges that are scorching household and business budgets. There’s some pointless extra money for coal seam gas, the removal of some funds for carbon capture (finally) and some previously promised funds for solar thermal (about time), and even another thought bubble on Snowy Hydro – this time to buy it out from the state governments. See Matt Rose’s article for more details. But there is nothing on climate change, no grand vision on energy. There are no new funds for the Direct Action policy that Turnbull had once ridiculed as a fig leaf for a climate action, and nothing on what might take Australia along the path to the pledge it signed in the Paris deal – effectively to reach zero net emissions by 2050. As Labor’s Mark Butler noted this morning, the Coalition’s climate change policy has officially gone from that fig-leaf to a non-existent farce. Nearly three years after celebrating the dumping the carbon price (above), slashing the RET and ignoring expert advice (CCA and the Climate Council), the Coalition government has no actual policy, on energy or climate, and its negligence is adding to the stunning rise in electricity prices it is trying to blame on everything and everyone else. “Malcolm Turnbull, the Prime Minister who once said he didn’t want to lead a Liberal Party that didn’t feel as strongly about climate change as he did, is now the Prime Minister who has completely dropped any pretence of attempting to combat climate change,” Butler says in his statement, noting that climate change did not rate a single mention in the Budget speech. “As the central pillar of the Direct Action policy, the Emission Reduction Fund, runs out of funds, this budget delivers ZERO new policies or funding to drive down pollution and combat climate change. This budget allocates more new money to the Department of the House of Representatives than it does to tackling climate change. “Budgets are about choices and priorities, and this budget makes it perfectly clear the Turnbull government isn’t choosing a safe climate because they don’t think it is a priority. This budget finally makes official what we already know; this Liberal government is failing all future generations of Australians.” Read More here 10 May 2017, Climate News Network, Ocean oxygen decline greater than predicted. Circulation changes caused by warming waters and melting polar ice are the most probable explanations for the rapidly falling levels of oxygen in the ocean. US scientists who have been warning that warmer oceans are more likely to be poorer in dissolved oxygen have now sounded the alarm: ocean oxygen levels are indeed falling, and seemingly falling faster than the corresponding rise in water temperature. That colder water can hold more dissolved gas than warmer water is a commonplace of physics: it is one reason why polar seas are teeming with marine life and tropical oceans are blue, clear and often relatively impoverished. In 2013, an international consortium of marine scientists warned that oxygen levels in the oceans could fall by between 1% and 7% by the century’s end. And this could, other scientists predicted, lead to what they politely called “respiratory stress” for some marine life. Ocean warming Ocean ecologists in the US and Germany warned last year that parts of the deep oceans were already showing signs of oxygen deprivation with corresponding dead zones. Earlier this year, another research group looked at the computer simulations for the years 1920 to 2100 and predicted that the hazards were likely to increasewith warming. Now the team have returned to the issue. They report in Geophysical Research Letters that they looked at data for the last 50 years and found the oxygen levels started dropping in the 1980s, as ocean temperatures began to climb – and falling unexpectedly rapidly. The trend of oxygen falling is about two to three times faster than what we predicted from the decrease of solubility associated with ocean warming,” says Takamitsu Ito, of the School of Earth and Atmospheric Sciences at the Georgia Institute of Technology, who led the study. “This is most likely due to the changes in ocean circulation and mixing associated with the heating of the near-surface waters and the melting of polar ice.” Read More here 6 May 2017, Inside Climate News, Extreme Weather Flooding the Midwest Looks a Lot Like Climate Change. Devastating storms still roiling much of the American Midwest have dumped record levels of rain over the past week and caused flash flooding that has killed at least 10 people, inundated towns and highways, and forced hundreds of people to evacuate their homes. Parts of Missouri, Illinois, Indiana, Arkansas and Louisiana received 10 to 15 inches of rain in the past seven days, according to the National Weather Service, resulting in record crests of numerous rivers across the central United States.Extreme storms like these have become more common as global temperatures have risen and the oceans have warmed. Some have the clear fingerprints of man-made climate change. “Of course there is a climate change connection, because the oceans and sea surface temperatures are higher now because of climate change, and in general that adds 5 to 10 percent to the precipitation,” Kevin Trenberth, a climate scientist with the National Center for Atmospheric Research, said. “There have been many so-called 500-year floods along the Mississippi about every five to 10 years since 1993.” Scientists won’t know the extent to which climate change played a role in these storms unless they do an attribution study. Such analyses determine how much the rise in trapped greenhouse gases increased the odds of a single event happening. Increasingly, scientists have tried to do these studies far more quickly to spread accurate information about how climate change is affecting us today and improve longer-term forecasts and warnings. An attribution study of last August’s deadly Louisiana’s storms—classified as a 1,000-year storm in the worst-hit areas and a 500-year storm in others—found that human-caused climate warming increased the chances of the torrential rains by at least 40 percent. That figure corresponds to the overall increase in extreme storms in the region. “Across the board, the United States has seen an increase in the heaviest rainfall events, and the Midwest specifically has seen an increase [in these events] of almost 40 percent,” said Heidi Cullen, chief scientist at Climate Central and a member of World Weather Attribution (WWA), a group that is developing methods to quickly determine climate change’s role in extreme weather events. Read More here 5 May 2017, Bloomberg Business Week, The Jersey Shore Would Rather Fight Flooding With Walls Than Retreat. The state’s $300 million fund to get coastal homeowners to relocate inland isn’t working. n a recent rainy afternoon near the Jersey Shore, John Spodofora, the mayor of Stafford Township, stood at the edge of the water and pointed to a spot in the salt marsh where he wants to build a giant berm to blunt the force of hurricanes. Stafford is on the western side of Barnegat Bay, the 40-mile body of brackish water north of Atlantic City that’s surrounded by blue-collar bungalows, cheap motels, and oceanfront mansions. In 2012, Stafford took a direct hit from Hurricane Sandy, which destroyed 3,000 of its homes. Rather than leave, most residents chose to rebuild. The berm project would cost as much as $100 million, money the town doesn’t have. Spodofora is hoping the federal or state government will fund it, even though most of the 5,000 homes the berm would protect will likely be underwater in a few decades with or without it. Still, Spodofora is committed. “There’s no areas of my town that I can say aren’t worth protecting,” he says. In coastal New Jersey, the debate about whether the climate is changing has been superseded by a more urgent question: What to do about it? While local officials such as Spodofora want to build walls against rising seas and fiercer storms, environmentalists say that delays the inevitable. The best policy, they say, is to encourage people to move inland and let the most vulnerable areas disappear into the water. They may have found allies in the Federal Emergency Management Agency. After spending more than $278 billion on disaster relief over the past decade, the agency has begun to consider a change in tactics. In March, Bob Fenton, FEMA’s acting administrator, told a meeting of state emergency directors that governments need to find ways to reduce risk. “We need to move out of threatened areas,” he said. New Jersey shows just how hard that will be. Read More here End Latest News Interactive: How climate change shapes food insecurity across the world 1 December 2015, Carbon Brief: Rising temperatures and more extreme weather are set to increase the pressure on food supplies around the world, risking shortages in the least-developed and developing countries and potentially pushing millions of people into deeper hunger and malnutrition. This is the message from the Met Office and the United Nations World Food Programme (WFP), who have joined forces to launch a new interactive map at the COP21 conference underway in Paris. The graphic lets you see where in the world is already vulnerable to food ‘shocks’, and how the picture changes depending on how much action, if any, we take to reduce our emissions. Click on image to open video Drinking recycled water (or as this video calls it, poop water) isn’t the most appealing notion for many people. But it’s becoming increasingly necessary––this video digs into some of the ways people have come to accept it. Source: Holly Kaw! Do we drink recycled water in Australia? Depending on where you live, or where you’ve travelled, there’s a chance you’ve already drunk recycled water. Water recycling happens in other regions of Australia but the water is generally directed exclusively for irrigation or industrial use. Recycled water overseas FCA is an alliance of farmers and leaders in agriculture who are working with their peers, the wider sector and decision-makers to make sure Australia takes the actions necessary to address damage to our climate. FCA is determined to see farmers and agriculture get the support and investment it needs to adapt to a changing climate, as well as be part of the solution. Members are spread far and wide across the country: from the tropical north of Queensland to Tasmania, and from the wine growing regions of Western Australia right across to the sheep and cropping farms of New South Wales. Farmers for Climate Action is an associate member of the National Farmers Federation, and a member of the Climate Action Network Australia (CANA). We work closely with stakeholders within the agricultural and climate realms. Learn more about Farmers for Climate Action here Feeding a Hungry Nation: Climate change, food and farming in Australia 7 October 2015, Climate Council: The price, quality and seasonality of Australia’s food is increasingly being affected by climate change with Australia’s future food security under threat, our new report has revealed. Australia’s food supply chain is highly exposed to disruption from increasing extreme weather events driven by climate change, with farmers already struggling to cope with more frequent and intense droughts and changing weather patterns. Climate change is affecting the quality and seasonal availability of many foods in Australia. Australia is extremely vulnerable to disruptions in food supply through extreme weather events. Climate change is the most challenging threat to food and water security between now and 2050 Water risks like stress and variable supply threaten everything from agriculture to industry to energy production. Already, 69 countries and one-quarter of the world’s cropland face high water stress. These challenges will likely become more severe as competition for water increases and climate change shifts precipitation patterns. The World Economic Forum identified global water crises as one of the top five global risks for businesses. Without tools to evaluate these risks and inform management plans, businesses’ bottom lines will suffer. Read More here UNEP: The real concern for the future, in the context of changing patterns of rainfall, is the decrease of run-off water which may put at risk large areas of arable land. The map shows how seriously this issue must be taken, while the forecast indicates that some of the richest arable regions (Europe, United States, parts of Brazil, southern Africa) are threatened with a significant reduction of run-off water, resulting in a lack of water for rain-fed agriculture and thus putting millions at risks. The accelerating changes in our global climate will undoubtedly cause major changes in the patterns of water cycle and geographical distribution, in the near future. Some regions will receive less precipitation, some more, and this will significantly affect agricultural activity. While some regions will see a reduction in arable land, others will have more suitable land for agriculture. It’s likely that certain types of agriculture will migrate and traditional areas for crops will change. In other words, climate change will alter the geography of traditional crop areas, which may impact on the world’s capacity to provide enough food for all. Since the 1990s, the scientific community has been warning about the rapidly changing climate, endeavouring to convince people to take urgent measures to mitigate the changes. These multiple warnings have been ignored until very recently, but the issue is now a priority with many international organizations. However, all reliable climate scenarios run by the IPCC and published in the fourth assessment reports show the following results: In other words, ongoing climate change will mean that the water supply for human communities will become more and more uncertain. The IPCC has stated that between 2000 and 2005 in the northern hemisphere, climate change accelerated faster than predicted, with the consequence that the water cycle could change in an unpredictable way, leading to the possibility of increases in extreme weather. The fear is that with all these changes, even if the quantity of water in the world does not change, the level of accessibility of the theoretically available water may significantly change. Source: UNEP Future Directions International highlights Australia’s challenge BOM water information and update sites 3 August 2015, The Conversation, The role of water in Australia’s uncertain future: If you live in an Australian city, there’s a good chance that your water comes from surface water such as streams, rivers and reservoirs filled by rainfall and runoff. If you live in Perth, much of your water (about 40%) comes from groundwater. But you might be surprised to know that a sizeable proportion of water in Australia came from recycling or desalination in 2013-14. 39% of Perth’s water came from desalination and 41% of Adelaide’s. All cities also used small portions of recycled water: Melbourne (4%), Sydney (7%), southeast Queensland (7%), and Canberra (8%). The Bureau of Meteorology recently released, for the first time, comprehensive national data on these “climate-resilient” water sources, through a new online portal provided as part of the Bureau’s Improving Water Information program. Climate-resilient water sources are those on which climate variability, such as variations in rainfall, temperature and drought, has little or no influence. The data set provides information on two of the most significant such sources: desalination and water recycling. The Climate Resilient Water Sources web portal is an interactive site providing comprehensive mapping and information of desalinated and recycled water sources for over 350 sites across Australia, both publicly and privately owned and operated. Users can access the portal, to search information on capacity, production, location and use of these alternative water sources across Australia. How many desalination and recycled water plants does Australia have? Below you can see the amount of desalinated and recycled water sourced for Australia’s cities in 2013–14 from the National Performance Report released in May 2015. From the Climate Resilient Water Source data we can also see which parts of Australia have the greatest climate resilient capacity compared to their sourced water (including surface, ground, recycled water and desalination). Western Australia has greater climate resilient capacity than its total water sourced in 2013–14, as you can see in the chart below: We can also see that more than 50% of reported production of recycled or desalinated water in 2012-13 (410,491 ML) was for urban use (residential, domestic, commercial, industrial, municipal). Read More here Improving Water Information: data, status and forecasts Australia’s variable climate drivers Weather and climate drivers: Floods, drought, and climate change are all driven by a number of processes in the atmosphere and oceans but the changes are driven at different timescales. The drivers shown in the map interact with each other and influence different parts of the continent to bring local weather and climate. The drivers include circulation patterns in the Pacific Ocean that bring El Niño conditions associated with drought in eastern Australia and La Niña conditions that are associated with floods. The Indian Ocean Dipole is a similar pattern in the Indian Ocean that can bring drought to south-west and south-east Australia, and the Southern Annular Mode are the major influences on rainfall (and thus runoff) in Australia. For more detail visit BOM here. Relatively small changes in rainfall are amplified to much larger changes in runoff and groundwater recharge, which make Australia’s water resources the most variable in the world. Water management is highly adapted to this variability, but the millennium drought in south-east Australia and the sharp drop in runoff in the South West of Western Australia since 1975 have tested the effectiveness of these adaptations. New measures are being introduced such as urban water supplies that are less dependent on runoff and the return of water to the environment to make it more sustainable. Climate change is occurring on top of that variability and in southern Australia it is likely to further reduce water resources. For the moderate climate change predicted to occur by 2030, the adaptation to droughts and floods can be effective, because the worst consequences are likely to be more intense droughts and less frequent but more intense floods. For further climate change, projected to occur by 2050 or 2070, the conditions of the millennium drought might become the average future water availability, which would have profound consequences for the way water is used and for ecosystems. The understanding of how climate influences water can help make water management more adaptable, such as through improved seasonal forecasts, and it can help communities plan how they will respond to reduced water availability in future. Source: CSIRO Water 7 climate chapter 3 from Water – Science & Solutions Report Understanding the ENSO Influence Source: BOM ENSO Wrap-up Groundwater use is increasing across Australia but the total use is difficult to estimate. Most groundwater is extracted by individual users and is rarely metered, and only a small fraction is managed through distribution networks. In 2004–05, licences for groundwater use were about 4700 GL/year, or 25% of the total amount of water consumed in Australia.2,3 Unlicensed use of groundwater – mainly for stock and domestic uses – is estimated to consume an additional 1100 GL/year.4 The amount of groundwater used is estimated to have almost doubled since the mid 1980s. Increased use of groundwater has been facilitated by recent drilling technologies and cheap submersible pumps that can lift water from considerable depths. In the drier parts of Australia, groundwater is the predominant water source because surface water resources are so scarce. Perth and Alice Springs, for example, rely on groundwater for about 80 and 100% of their water supply, respectively. When surface water resources become scarce, users turn to groundwater to meet their needs. Declines in surface water availability during the millennium drought in the southern Murray–Darling Basin led to a modest rise in groundwater use (1240 GL in 2000–01 to 1531 GL in 2007–08), but a sharp rise in the proportion of water supplied from groundwater (11% to 37%).5 Given the reliability of supply and convenience of self supply, the use of groundwater may not return to previous levels, even when surface water availability does. Many aquifers with high historical rates of use are showing symptoms of over-use, such as falling water tables and lower aquifer pressures and subsequent impacts on future use, groundwater salinity, river flows, and ecosystems. The level of over-use was not recognised for decades because of the lags inherent in large, flat, and slow moving groundwater systems. Remediation of these systems is expensive and difficult because salinity and ecological damage are hard to reverse, and because of the historical expectation of reliable water supplies. Inadvertent impacts of recent strong growth in groundwater use have not been felt yet and, given that the consequences of present use are in many cases still to be felt, some caution should be exercised around future groundwater development, by putting effective risk assessment and management processes in place. Source: CSIRO Water & Climate chapter 4 from Water – Science & Solutions Report All things groundwater in Australia BOM Groundwater information: The Bureau provides a suite of nationally consistent groundwater data and information products. Government, industry and the general public can use these products to inform decision-making and research about groundwater resources. Groundwater information products: A third of the world’s biggest groundwater basins are in distress 16 June 2015, Two new studies led by UC Irvine using data from NASA Gravity Recovery and Climate Experiment satellites show that civilization is rapidly draining some of its largest groundwater basins, yet there is little to no accurate data about how much water remains in them. The result is that significant segments of Earth’s population are consuming groundwater quickly without knowing when it might run out, the researchers conclude. The findings appear today in Water Resources Research. “Available physical and chemical measurements are simply insufficient,” said UCI professor and principal investigator Jay Famiglietti, who is also the senior water scientist at NASA’s Jet Propulsion Laboratory. “Given how quickly we are consuming the world’s groundwater reserves, we need a coordinated global effort to determine how much is left.” The studies are the first to characterize groundwater losses via data from space, using readings generated by NASA’s twin GRACE satellites that measure dips and bumps in Earth’s gravity, which is affected by the weight of water. For the first paper, researchers examined the planet’s 37 largest aquifers between 2003 and 2013. The eight worst off were classified as overstressed, with nearly no natural replenishment to offset usage. Another five aquifers were found, in descending order, to be extremely or highly stressed, depending upon the level of replenishment in each — still in trouble but with some water flowing back into them. The most overburdened are in the world’s driest areas, which draw heavily on underground water. Climate change and population growth are expected to intensify the problem. Read More here Need for Water Futures and Solutions 7 June 2016, YALE Connections: Climate Changing the Menu: A selection of downloadable reports on climate change, agriculture, and food. Along with the flood of books dealing with food and climate change issues, a wealth of free substantive reports, available as PDF downloads, also beckon for readers’ attention and action. Part Two of bibliophile Michael Svoboda’s “Climate changing the menu” selections offers links to a trove of recent authoritative reports . . . enough to make any foodie late for their next meal. The descriptions of the studies below are drawn from copy provided by the publishers. Access reports here In 2009 seven countries (USA, Canada, Brazil, Argentina, Australia, Russia and France) were responsible for more than 50% of the annual global exports of wheat, maize, soybeans, rapeseed, chicken and beef. In addition, two countries (Thailand and Vietnam) were responsible for 50% of the annually export of rice. Most of these exporting countries have access to significant amounts of annually renewable water resources, Australia being the exception. This chapter also shows how the amount of virtual water differs between the different countries. Source: Virtual Water, University of British Columbia Australia and the Global Food and Water Crisis Source: Water Scarcity and Future Challenges for Food Production Future Directions International preamble from their webpage regarding “Australia’s role in solving future global food and water crises”: Food and water insecurity are among the most formidable challenges facing the world. The potential for food or water crises to manifest between now and 2050 is high. If such events were to occur, they would lead to rising poverty levels, slowing growth and development, and widespread instability and conflict. Australia’s greatest responsibility and opportunity in the 21st century is to help feed a hungry world. Mobilisation of political will and an overhaul of the existing global food systems are critical to avert crises. To access Future Directions Reports: “Food and Water Security: Our Global Challenge”; The Forgotten Resource: Groundwater in Australia 28 May 2015, Future Directions International: Urban agriculture is becoming an increasingly prominent topic in discussions on food security in Australia. More than 90 per cent of Australia’s population lives in urban centres and depends on a decreasing agricultural workforce to meet increasing food demand. Long food supply chains, although economically efficient, lead to poor nutritional and environmental outcomes for society. The re-localisation of food production will support and enhance Australia’s food system and has the potential to increase access to nutritious, affordable food for the most vulnerable. Australia produces enough food to feed 60 million people, yet economic barriers leave an estimated 2 million Australians dependent on food relief annually. Foodbank Australia is reportedly struggling to meet demand; it turns away as many as 60,000 people each month due to a shortage of food. To enhance food security, efforts need to be focussed on overcoming the increasingly volatile food prices that are expected to occur as a result of increased production and energy costs and the effects of climate change. There is a strong consensus amongst academics and policy makers that urban agriculture is a viable means of increasing domestic food security. Urban agriculture has assisted communities in both developed and developing nations to cope with food insecurity, by ensuring local availability of nutritional and affordable food. Greater support, however, is required from the Federal, State and Local governments, to ensure that benefits can be realised within Australian cities. Read More here
Complexity of food distribution March 2015, NASA GISS Science Brief, Study Assesses Fragility of Global Food System: If you were in the New York metropolitan area (the home of the NASA Goddard Institute for Space Studies) in the days after Hurricane Sandy, you might have experienced something seemingly unthinkable in 21st century America: empty food shelves at the supermarkets for days and days. New Yorkers believe that they can stand up to whatever life throws at them, yet this experience caught even the proudest natives off-guard…..Taking a step back, should we really be surprised by a disruption to our regional food system? More importantly, how concerned should we be about the stability of our global food system in a world marked by geopolitical, economic, and climatic uncertainties? Read More here Zero Carbon Australia Discussion Paper: Land Use: Agriculture and Forestry: Emissions in the agriculture and forestry sectors in Australia are high and growing. The UNFCCC National Inventory Report suggests that sources of land use emissions, such as land clearing for agriculture and enteric (intestinal) fermentation from digestive processes in livestock, contribute 15% of national emissions. Australia’s land use sector is in a unique position to mitigate (reduce) climate impacts and take a leading role in addressing climate change. Agriculture and forestry are the only sectors of the Australian economy that can draw carbon dioxide out of the atmosphere by sequestering it in growing plants and in the soil. The agriculture and forestry sectors can mitigate climate impacts on the land, bringing prosperity to rural areas in the process. The Zero Carbon Australia Land Use report explores how this can be done. The ZCA Land Use Report outlines a range of measures that can substantially reduce emissions and provide opportunities for farmers in building resilience to the impacts of climate change. These measures encompass both agriculture and forestry and address emissions at the scale required to prevent catastrophic climate change. The Land Use Report analyses the suite of land use practices in Australia for their function as a source of greenhouse emissions, the potential of the landscape to draw down atmospheric CO2, and the likely impact of changes to land use patterns on local economies. The report provides a comprehensive assessment of how Australia can manage its productive capacity, ecological heritage and ecosystems services for the future. The ZCA Land Use report is can be ordered via our online shop. It is also available for free download. Water and climate change
Agriculture – feeding the world