01/06/2020

(AU) Land Projected To Be Below Annual Flood Level In 2050

Climate Central

Coastal Risk Screening Tool
Click here for land in Australia projected to be below annual flood level in 2050
Improved elevation data indicate far greater global threats from sea level rise
and coastal flooding than previously thought, and thus greater benefits from reducing their causes.

FLOODED FUTURE
Global vulnerability to sea level rise worse than previously understood (pdf)
Full Report (pdf)

SUMMARY
  • As a result of heat-trapping pollution from human activities, rising sea levels could within three decades push chronic floods higher than land currently home to 300 million people
  • By 2100, areas now home to 200 million people could fall permanently below the high tide line
  • The new figures are the result of an improved global elevation dataset produced by Climate Central using machine learning, and revealing that coastal elevations are significantly lower than previously understood across wide areas
  • The threat is concentrated in coastal Asia and could have profound economic and political consequences within the lifetimes of people alive today
  • Findings are documented in a new peer-reviewed paper in the journal Nature Communications
Sea level rise is one of the best known of climate change’s many dangers.

As humanity pollutes the atmosphere with greenhouse gases, the planet warms. And as it does so, ice sheets and glaciers melt and warming sea water expands, increasing the volume of the world’s oceans.

The consequences range from near-term increases in coastal flooding that can damage infrastructure and crops to the permanent displacement of coastal communities.

Over the course of the twenty-first century, global sea levels are projected to rise between about 2 and 7 feet, and possibly more.

The key variables will be how much warming pollution humanity dumps into the atmosphere and how quickly the land-based ice sheets in Greenland and especially Antarctica destabilize.

Projecting where and when that rise could translate into increased flooding and permanent inundation is profoundly important for coastal planning and for reckoning the costs of humanity’s emissions.

Projecting flood risk involves not only estimating future sea level rise but also comparing it against land elevations.

However, sufficiently accurate elevation data are either unavailable or inaccessible to the public, or prohibitively expensive in most of the world outside the United States, Australia, and parts of Europe.

This clouds understanding of where and when sea level rise could affect coastal communities in the most vulnerable parts of the world.A new digital elevation model produced by Climate Central helps fill the gap.

That model, CoastalDEM, shows that many of the world’s coastlines are far lower than has been generally known and that sea level rise could affect hundreds of millions of more people in the coming decades than previously understood.

Based on sea level projections for 2050, land currently home to 300 million people will fall below the elevation of an average annual coastal flood. By 2100, land now home to 200 million people could sit permanently below the high tide line.

Adaptive measures such as construction of levees and other defenses or relocation to higher ground could lessen these threats.

In fact, based on CoastalDEM, roughly 110 million people currently live on land below high tide line. This population is almost certainly protected to some degree by existing coastal defenses, which may or may not be adequate for future sea levels.

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BBC Science & Environment - Roger Harrabin

Switching to a vegan diet can help but doesn't quite have the impact of other measures. Getty Images



Climate change can still be tackled – but only if people are willing to embrace major shifts in the way we live, a report says.

The authors have put together a list of the best ways for people to reduce their carbon footprints.

The response to the Covid-19 crisis has shown that the public is willing to accept radical change if they consider it necessary, they explain.

And the report adds that government priorities must be re-ordered.

Protecting the planet must become the first duty of all decision-makers, the researchers argue.

The authors urge the public to contribute by adopting the carbon-cutting measures in the report, which is based on an analysis of 7,000 other studies.



Top of the list is living car-free, which saves an average of 2.04 tonnes of CO2 equivalent per person annually.

This is followed by driving a battery electric car - 1.95 tonnes of CO2 equivalent per person annually - and taking one less long-haul flight each year - 1.68 tonnes of CO2 equivalent per person.

Switching to a vegan diet will help - but less than tackling transport, the research shows.

It says popular activities such as recycling are worthwhile, but don’t cut emissions by as much.

Change of mindset

The lead author, Dr Diana Ivanova from Leeds University, told BBC News: “We need a complete change of mindset.

“We have to agree how much carbon we can each emit within the limits of what the planet can bear – then make good lives within those boundaries.

“The top 10 options are available to us now, without the need for controversial and expensive new technologies.”



Dr Ivanova said the coronavirus lockdown has shown that many people could live without cars if public transport, walking and cycling were improved.

Her research highlights rich people who typically take more flights, drive bigger cars and consume the most.

A 'moral issue'

She said: “All the world suffers from climate change, but it’s not the average person who flies regularly – it’s a small group, yet aviation is under-taxed. It’s a moral issue.”



In her league table, buying renewable power and using public transport rank fourth and fifth.

Sixth is insulating your home well, which saves 0.895 tonnes of CO2 equivalent.

Seventh is switching to a vegan diet, which saves 0.8 tonnes.

Effectively insulating your home is an important step. PA Media



Other top actions are using heat pumps; switching from polluting cookstoves (in developing countries) to better methods of cooking, and heating buildings with renewable energy.

Dr Ivanova said that if people implemented the measures, it would save around nine tonnes of carbon dioxide equivalent (CO2e) per person per year.

Current annual household emissions are around 10 tonnes in the UK, and 17 in the US.

'Valuable' study

The study, out soon in the journal Environmental Research Letters, says the following are worthwhile, but of lesser benefit to the climate: green roofs; using less paper; buying more durable items; turning down the thermostat - and recycling, which saves 0.01 tonnes of CO2 equivalent per year, according to Dr Ivanova.

Outside of lockdown, taking fewer flights can make a major contribution to cutting carbon. Reuters



Some of the findings will be questioned. Polls suggest some people think climate is as important as the virus, for instance, but some don’t.

Professor Tommy Wiedmann from the University of New South Wales in Australia, said: “This is a valuable study. But it only looks at the carbon footprint and not at other impacts like water scarcity because of lithium mining for electric car batteries.

Libby Peake, from the Green Alliance think tank, told BBC News: “People shouldn’t stop good habits like recycling, which saves some carbon while preventing waste and conserving resources.”

“Better design allows people to buy fewer but higher-quality things and to live in buildings with lower carbon footprints. These savings aren’t necessarily covered by this study.”

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India Is Facing A Locust Invasion Directly Related To Climate Change

One Green Planet - Eliza Erskine

Image Source : Jen Watson/ Shutterstock.com

India is being swarmed with locusts, according to the Indian Express. Jaipur is experiencing a locust invasion that’s eating crops.

Farmers told news outlets that the invasion is the worst one they’ve seen.

Images and videos show hoards of insects on multiple surfaces. In Jaipur, locusts have not been seen since 1993.

While swarms have been spotted in Rajasthan in the past twenty years, the insects have spread to other parts of the country, including Uttar Pradesh and Madhya Pradesh.

Locusts have amazing appetites and a single swarm in a square kilometer can eat as much as 35,000 people. As India already deals with the effects of COVID-19 and subsequent lockdowns, this is another problem for the country.

Akhilesh Litoria owns a farm in Jhansi, Uttar Pradesh.

He told The Wire about the swarms, “It looked like someone had placed a huge white sheet on top of the entire field. They finished the entire crop in the area. We had planted moong and they ate all of it. They did not even spare leaves on trees. Some of them sat on trees and ate all the leaves.”

Climate scientists say that warm waters due to heavy rainfall made the areas susceptible to the swarms.

Roxy Mathew Koll, a climate scientist at the Indian Institute of Tropical Meteorology, told The Wire in an email, ” Heavy rain triggers the growth of vegetation in arid areas where desert locusts can then grow and breed. These locusts which migrated to India early this year might have found greener pastures as the pre-monsoon rains during March-May were in excess over north India this year.”


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31/05/2020

(AU) Bushfire Hearings Spotlight Climate Change

Saturday Paper - Mike Seccombe

Experts called during the opening week of the bushfires royal commission warned the Black Summer will not be an isolated event.

Ian Livingston and his son Sydney, 6, among the ruins of their family home, lost to the New Year’s Day bushfires in Cobargo. Credit: Brook Mitchell / Getty Images

It was February 18, and Scott Morrison was being pressed for government action in response to a growing emergency.

The prime minister justified his refusal to act with these words: “No one can tell me that going down that path won’t cost jobs.”

The emergency at hand was not the coronavirus; Australia was almost two weeks away from recording its first death from Covid-19.

The focus then was the summer of bushfires and the role climate change had played in the devastation. Morrison had been asked why his government, unlike many others around the world, and all Australian states and territories, had refused to commit to a target of net zero emissions of greenhouse gases by 2050.

His answer – that it would cost jobs and money – rang hollow in light of the lived, breathed experience of Australians during the summer. Climate change already was costing jobs, thousands of them. And vast sums of money. And lives.

But it looks even more hollow now, not least because his inertia in the face of that crisis so sharply contrasted with his urgency on the next.

Within a month of dismissing the need for an emissions target, Morrison and his emergency cabinet of state and territory leaders responded to the threat posed by Covid-19 with a national lockdown.

While the decisive action was driven by the states, Morrison went along, enthusiastically serving as chief marketer for their collective decision. At no point did he cavil on the basis that jobs might be lost. Instead, he followed the advice of the experts and did what had to be done in order to avoid a greater catastrophe.

Then this week, the bushfires royal commission – more properly, the Royal Commission into National Natural Disaster Arrangements – began its public hearings. And the evidence given by a succession of expert witnesses served to remind us there was a bigger crisis that preceded Covid-19, one that will persist long after it.

The Bureau of Meteorology’s head of climate monitoring, Karl Braganza, gave a PowerPoint presentation filled with alarming graphs and maps, showing the extent to which carbon pollution had altered Australia’s climate, and how much worse things will get in the absence of action.

Already, he told the commission, the fire season is starting three months earlier in much of south-eastern Australia. Fire danger index readings that would typically have occurred at the start of summer in the 1950s are now recorded at the start of spring.

Temperatures are higher, rainfall and humidity lower, soils and vegetation drier, and westerly winds, blowing from the arid centre of the continent, are more frequent.

Indeed, Braganza said, referring to one of his frightening maps, “almost over all of Australia we’re seeing a longer fire season with more fire danger days during that season, and the severity of the worst fire danger days is becoming more severe”.

He was clear: the tragedy of the so-called Black Summer was not a “one-off event”.

“Since the Canberra 2003 fires, every jurisdiction in Australia has seen some really significant fire events … [that] have really challenged what we thought fire weather looked like.”

In the first two decades of this century, there were only four wet years, Braganza said. The 10-year period from 2009 to 2019 was the hottest decade this country had seen, with 2019 the hottest and driest year on record.

Not every coming year will be so bad, of course.

It seems the coming season will be less severe, assuming the good rains so far this year persist as forecast. But the longer-term trends, Braganza said, “probably load the dice towards worse fire seasons in general”.

Karl Braganza and the other experts who followed him – not only climate scientists but also insurers and actuaries whose businesses depend on accurately assessing risk – provided a comprehensive and dark picture of increasing threats from climate change.

They spoke of rising sea levels; more intense cyclones that would strike further south, if less frequently; worse storms and floods; many more days of extreme heat.

Ryan Crompton of Risk Frontiers, an outfit that provides risk-assessment services, including what it calls “catastrophe modelling”, told the commission that between 1900 and 2015, heatwaves were “Australia’s deadliest natural hazard”.

“They account for almost half of the total number and almost five times the number of fatalities than do bushfires,” he said.

The two phenomena – heatwaves and fires – often coincide. Crompton pointed to the example of the 2009 Black Saturday bushfires in Victoria, during which 173 people died as a direct result of the fires, while a further 374 deaths were attributed to the preceding heatwave. Melbourne saw three days above 43 degrees the week of that tragic Saturday.

A study undertaken by a team at the Australian National University medical school – published last week in The Lancet Planetary Health – re-examined the causes of more than 1.7 million deaths in Australia between 2006 and 2017 and found that heat was likely to have contributed to at least 37,000 of them.

In the case of last summer’s bushfires, there was another peril, too. Smoke.

Associate Professor Fay Johnston, of the Menzies Institute for Medical Research at the University of Tasmania, said about 80 per cent of Australians were affected by bushfire smoke at some point during last year’s fire season.

On the basis of analysis carried out by her team, Johnston said, there were 445 “excess deaths” attributable to smoke, along with 3340 admissions to hospital for heart- and lung-related problems and 1373 additional presentations to an emergency department for asthma.

She estimated the cost associated with premature loss of life and admissions to hospitals at $2 billion.

This did not include a range of other health impacts that her team had not modelled, including, among other things, “loss of work time, missing school, needing medications, impacts on diabetes, impacts on ambulance callouts”.

“Covid showed that people’s attitudes and behaviours can change. We had leadership, crafting a sense of who we are and what we should do and how we should act in the interests of ourselves and our communities.”

There is also the cost, unquantifiable in dollar figures, to the mental health of the tens of thousands of people who lost loved ones or homes in the fires.

Professor Lisa Gibbs, of the University of Melbourne, an expert in disaster recovery and community resilience, and child health and wellbeing, told the hearings that advancing climate change introduced a worrying new element for mental health, in that such disasters were “no longer perceived as rare events”.

She expressed concern the perception of a “new reality”, wherein devastating fire seasons keep happening, could undermine the sense of hope that those affected need to get their lives back on track.

The commission was provided with a long list of other costs, too: 3117 homes and 6310 outbuildings destroyed; 89,000 kilometres of fencing and 880 kilometres of roads burnt.

Some $2.2 billion of insurance claims have already been lodged, says the Insurance Council of Australia.

The loss of economic output is “in the order of $3.6 billion”, according to the consultancy group EY. Hundreds of millions in welfare payments have been made by the federal government, hundreds of millions more for clean-up and recovery from state and local authorities. The average cost of removing the debris from one destroyed home is more than $50,000.

There are dollar costs, but there are also intrinsic values that are harder to assess.

How do you value 8.27 million burnt hectares of land, an estimate that doesn’t even include Western Australia and the Northern Territory, when most of it is covered by bush? Or the deaths of a billion native animals?

How do you calculate the impact of habitat loss on 300-odd plant and animal species already considered endangered or threatened, or the many others that were considered “secure” before the fires but now are not?

The entire range of some species was burnt, according to evidence Threatened Species Commissioner Dr Sally Box gave the commission this week. Extinctions could follow, perhaps even the end of species not yet known to science.

It is difficult, of course, to compare the impacts of the Black Summer with those of the coronavirus. The toll of Covid-19 could have been orders of magnitude larger, if swift action wasn’t taken. The chief medical officer, Brendan Murphy, says the nation’s handling of the coronavirus pandemic has avoided about 14,000 deaths.

But timely action was taken and, as of Thursday, the federal Health Department has recorded 103 Covid-19 fatalities in this country. This is a little more than one-fifth of the number of deaths attributed to the fires – 33 direct and another 445 from smoke.

Yet in response to the health emergency, our leaders were prepared to shut down large sections of our economy, tolerate the loss of maybe a million jobs and hundreds of billions of dollars, and enforce major changes to the way all members of society live and work.

To the question of why our government was prepared to do all this in response to one crisis, while doing so little in response to the greater threat, Professor Warwick McKibbin, economist, specialist in public policy at the ANU’s Crawford School and an expert in both pandemics and climate issues, offers some insight.

With pandemics, he says, the cost of the response always vastly exceeds the cost of the disease itself. It’s par for the course. Even without a government-mandated domestic lockdown, much of the economic loss would have happened anyway as people self-isolated for fear of infection.

“I haven’t got the final numbers yet, but my guess is that about 10 per cent of the lost economic activity – that’s 10 per cent of the total loss – is probably due to government [lockdown],” he says.

The rest was largely attributable to other factors, including the impact on international trade and the spontaneous behavioural change by the populace.

McKibbin cites a real-time case study in the differing responses of two otherwise similar nations: Denmark and Sweden. The former imposed a tight lockdown; the latter didn’t. While the Swedes hoped their response would keep their economy humming, it didn’t.

“The death rate in Sweden is orders of magnitude bigger than Denmark, and the economic costs are about the same,” says McKibbin. “The Swedish central bank is forecasting a contraction in the economy of about 8 per cent.

“So, if all Sweden’s trading partners have a recession, then the chances are they’ll have a recession.”

This is compounded by the fact that in Sweden, even without a mandatory lockdown, many people changed their behaviour.

It is all very interesting but only broadens the question about the differing responses to the two crises from both the government and the community.

McKibbin says one crisis was perceived as being personal and immediate. The threat horizon for the virus was days or weeks; climate change, meanwhile, has loomed for decades.

“We were watching morgues in New York overflowing, watching people dying in the streets in Italy,” McKibbin says. “The impact of the pandemic was already real.”

The virus set down a clear either/or: “If you don’t do anything in Australia, you’re going to get it. If you do something in Australia, you may not get it.”

In relation to climate change, though, the widely held perception is fatalistic – that, regardless of any actions Australia might take, “climate change is going to happen anyway, if nobody else does anything either”.

This sentiment is the subtext of Scott Morrison’s words back in February: why suffer the costs of change, if no benefit will flow?

But there is growing evidence to suggest this is a false narrative.

The Australia Institute recently conducted a meta-analysis in response to claims that an ambitious climate response would “wreck the economy”, combing through 19 reports published in the past five years in peer-reviewed journals, and from academics and government agencies, along with three major Treasury reports from 2008 to 2013.

A number of these went to the electricity sector only, with five modelling a 100 per cent renewable grid. Others looked at the broader economy. Most of the models showed negligible economic cost would be incurred by meeting targets broadly in line with the goal of the Paris climate change agreement. And some showed positive economic gains.

Nonetheless, as McKibbin acknowledges, Australia cannot make much difference to the climate crisis on its own.

But, he says, Australia’s role is bigger than that, as “a laboratory” for the rest of the world when it comes to policy.

“If you do something on climate in Australia … and you demonstrate that a very high carbon economy can end up with a low carbon economy, cheaply, then people will copy your policies. And that can actually totally change the global emissions profile,” he says.

This country has served as such an example to the world many times before.

“We’ve done that when it comes to monetary policy. We’ve done it in fiscal policy with the tariff policy,” says McKibbin. “We’ve done it in health policy, [and] designing our education funding through the HECS scheme. We’ve demonstrated to other countries and they’ve adopted that scheme. And that’s improved the quality of life for everybody.

“So, Australia’s role is not to be the leader because we’re going to make a difference to emissions. It’s because we’re going to demonstrate policy that will make a difference to emissions.”

The question that remains, though, is do we have the will?

The signs from our current federal government are not promising. But it seems the Covid-19 crisis hasn’t distracted people from the climate emergency.

An Essential poll conducted in mid-March, at the height of the coronavirus outbreak in Australia, found 31 per cent of those surveyed were more concerned about climate than they were a year ago, before the fires.

Is it possible, then, that rather than supplanting concern about the climate, the Covid-19 episode has accentuated the popular sense of urgency?

Kate Reynolds, professor of psychology at the ANU, thinks so. Having successfully faced one existential threat, she says, people are more inclined to believe they can deal with another.

“Covid showed us a few things,” she says. “It showed that people’s attitudes and behaviours can change.

“We had leadership, crafting a sense of who we are and what we should do and how we should act in the interests of ourselves and our communities. Call it a social identity, a sense of shared social identity, and a common cause.”

She says that people came to feel in some ways a greater “efficacy”, in the psychological sense: “Things that seemed hard before Covid – in making profound changes in the way we went about our lives – proved possible.”

It will be harder for governments to now make excuses on the basis that change is too big, too costly, too hard.

Reynolds says that as social creatures, humans are motivated to “protect the group, to act in the best interests of the group”.

As civilisation has advanced, that understanding of “the group” has, on the whole, grown more encompassing.

What the coronavirus crisis has shown – and this stands true for the climate crisis, too – is that our conceptualisation of who is part of the group will need to further expand.

For when it comes to the really big issues, there is no immunity to the risk. And no one is safe unless all are.

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(AU) The Climate Crisis Looms As The Coalition Fiddles With Fossil Fuels

The Guardian - 

The government is like a smoker switching to low-tar cigarettes. Its energy policy is just a sop

‘Angus Taylor’s discussion paper is the ... wrong policy at precisely the wrong time.’ Photograph: Mick Tsikas/AAP

We may be dealing with a health crisis, but the climate change crisis has not gone away, nor become any less urgent. In fact, the opposite.

A few conservative commentators have suggested Covid-19 shows what a real crisis looks like compared with, in their opinion, the hyperventilating over climate change.

What bollocks.


NASA estimates that last month was the hottest April on record and the first four months of this year are the second hottest start to a year.

The past seven months have all been 1C or higher than the 1951-1980 average (roughly around 1.3C above the pre-industrial average) – tied with the longest streak set from October 2015 to April 2016. But unlike in 2015 and 2016 the Bureau of Meteorology records we are currently not in El Niño.

That very much suggests the pace of warming is speeding up.

The linear trend of temperatures over the past 60 years suggests we will hit 2C above pre-industrial levels in 50 years; the trend of the past 20 years has it happening in around 30 years, but the trend of the past decade would see us hit that level in 2038 –just 18 years’ time.

In 2018, the IPCC warned we had little time to keep temperatures below 1.5C above pre-industrial levels. If the trend of the past decade continues, we’ll hit that temperature in 2025.

And no, the virus has not bought us more time.

A study published this week in Nature Climate Change estimates the annual global drop in emissions due to virus shutdowns will be “comparable to the rates of decrease needed year-on-year over the next decades to limit climate change to a 1.5°C warming”.

That it took forcing people to stop their lives to achieve such cuts highlights just how big the job ahead of us is and how it cannot be done through individual action alone.

Cutting emissions without crippling the economy requires not everyone self-isolating, but changing industries and the very foundations of our economy.

We need to move away from oil, coal and gas to renewable energy.

And so it should be of great concern that the government is using the coronavirus as cover to push fossil fuels.

This week Adam Morton revealed that a manufacturing taskforce, headed by Dow Chemical executive and Saudi Aramco board member Andrew Liveris, is recommending to the National Covid-19 Coordination Commission (itself headed by the current deputy chairman of Strike Energy, Neville Power) that “the Morrison government make sweeping changes to ‘create the market’ for gas and build fossil fuel infrastructure that would operate for decades”.

It comes off the back of Angus Taylor suggesting it is not government policy to achieve net zero emissions by 2050, and the government giving in-principle support to recommendations made by a panel headed by a former CEO of Origin Energy, Grant King, to allow the Australian Renewable Energy Agency and the Clean Energy Finance Corporation fund projects involving carbon capture and storage.

Taylor also this week released a discussion paper for a “framework to accelerate low emissions technologies”. While suggesting renewables are vital, it essentially pushes for the same energy mixes that were being advocated a decade ago – more gas, the discredited carbon capture, as well as nuclear power.

The government is like a smoker who still thinks switching to low-tar cigarettes is a healthy approach.

It’s the wrong policy at precisely the wrong time.

As Morton has reported, organisations and governments around the world are advocating using economic stimulus measures to push towards a greener economy.

A report released this week by the Australian Conservation Foundation echoed the Grattan Institute’s recent “Start with steel: A practical plan to support carbon workers and cut emissions” report, arguing that we should see the virus as an opportunity to transform our economy and invest in renewable energy.

But no. It is clear the government remains wedded to a fossil-fuel based economy in which its climate change policy is merely a sop rather being designed to deal with a major crisis that is only becoming more urgent.

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(AU) Bushfire Report Warns Climate Change Will Cause More Intense And More Frequent Blazes

The Australian - 

Climate change will increase the duration of the fire season, a report has warned. Picture: Getty Images

Climate change will increase forest fires, making many areas drier and hotter, extending the duration of the fire season and increasing the area and intensity of unplanned forest blazes, a government report has warned.

The Australian Bureau of Agricultural and Resource Economics and Sciences study of ­forest fires, released on Wednesday, says the changes will reduce the interval between fires and the ­opportunity for using planned fires to contain the hazard.

ABARES principal forest scientist Steve Read said while ­climate change would have an impact on most forests one way or another, the ­bureau had identified “a distinct north-south divide” in the pattern of forest fires.

“Unplanned fires in forests in northern Australia are more frequent and occur over greater areas,” Dr Read said.

“Unplanned fires in forests in southern Australia are less frequent than in northern Australia, but they can be much more intense when they do occur and in some years, such as 2019-20, cover large areas.”

The ABARES study has found that between 2011 and 2016, 55 million hectares, or 41 per cent of Australia’s total 134 million ha of forest, burned one or more times.

LARGE IMAGE


Of the cumulative forest fires over the five years, 96 per cent covered northern Australia, including large areas burnt in multiple years. Of all the fires, 69 per cent were unplanned and 31 per cent were planned.

“The difference between northern and southern Australia is the biggest point to communicate,” Dr Read told The Australian. “The biggest difference is that there is a huge amount of fire every year in the savannah forest right across northern Australia.”

This reflected the regular annual pattern of a wet season when grasses, including more invasive species, grew, followed by a dry season when they burned.

“Fires in northern Australia are driven by fuel load,” Dr Read said. “Climate change in the north will work through, giving you more fuel seasonally every year because of potentially better growing seasons in the wet season when the grass grows.”

In the south, Dr Read said, extensive forest fires were usually produced after a set of dry years.

“The real driver for the fires in 2019-20 was that we had a hot drought — a series of dry years and some heat — and climate change is expected to give you more heat and drier conditions in southern Australia,” he said.

The report says most Australian forests are adapted to fire and can regenerate.

“Fire is an important ecological driver in most Australian forests, whether the tall moist forests of southeastern and southwestern Australia or the woodlands of northern Australia. It influences the nature of entire forest ecosystems,” the report says.

Some tree species specifically require fire to regenerate or establish, it says, such as mountain ash which forms tall forests in Victoria and Tasmania.

In southern Australia, nearly 80 per cent of the fires occurred on nature conservation reserves or multiple-use public forests.

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30/05/2020

Plunging Solar Energy Prices Spell Bright Future For Clean Electricity

Deutsche Welle - Ajit Niranjan

Solar energy has fallen in cost faster than experts predicted. How did electricity from photovoltaic panels get so cheap?



The plummeting cost of turning sunlight into electricity is beating forecasts by decades, speeding the transition toward a clean energy system.

Solar prices have sunk low enough to make photovoltaics the cheapest source of electricity in most of the world — undercutting fossil fuels in price even before counting costs like air pollution and climate change. Averaging about $0.05/kWh, the cost of generating solar electricity has reached lows that six years ago the International Energy Agency did not expect to come until the middle of the century.

When Jenny Chase started working on solar energy in 2006, her job title was head of "improbable technologies" — and she thought solar could only ever provide 1% of the world's electricity mix. "Now, it's already gone north of 2%," said Chase, a solar analyst at energy consultancy BloombergNEF.

The price of renewables like solar matters for climate change. The energy sector is responsible for about three-quarters of global greenhouse gas emissions — mainly from burning coal, oil and gas — and governments must rapidly decarbonize their electricity grids to meet targets that keep global warming well below 2 degrees Celsius (3.6 degrees Fahrenheit).

Forecasters have underestimated the rate at which solar capacity would grow


Coal, which has long been considered the cheapest way of generating electricity, is now struggling to compete with energy from sunlight. The competition has grown so fierce that developers risk wasting more than $600 billion (€546 billion) through planned coal projects, according to analysis published in March by think tank Carbon Tracker Initiative.

Within a decade, the authors predict, it will be cheaper everywhere to shut down existing coal-fired plants and build new solar and wind plants in their place. That could shift the energy mix in coal-hungry countries like the US with governments hostile to efforts to halt climate change.

Cheap solar energy has now become a "no-regrets" solution, said Marcelo Mena-Carrasco, a Chilean former environment minister. "It doesn't matter what your presidents think, it's the market that's doing the talking."

Burning coal carries hidden costs like air pollution and climate change



Germany's new Datteln 4 coal-fired power station is likely to be the country's last



Where is solar energy cheapest?

The cheapest solar energy deal in the world was signed last month by Abu Dhabi at $0.0135/kWh, lower than record-breaking deals set earlier this year by Dubai and then Qatar. Analysts say that utilities in these countries benefit from free land and grid connections that lower prices beyond the true cost.

In other regions — even sunny ones — barriers to finance hold back expansion.

In India, where the government is pushing to revive a faltering coal industry, solar developers pay several times more interest on debt than in the Middle East, said Vibhuti Garg, senior energy specialist at the International Institute for Sustainable Development.

Across Africa, where energy demand is projected to soar as populations and living standards rise, difficulties securing loans have stalled a potentially lucrative solar boom. There are just 5 gigawatts of solar photovoltaic panels installed on the continent — less than a single country like the UK, which receives far fewer hours of sunshine.

"We're talking about a geography that is incredibly blessed with renewable energy," said Mohamed Adow, director of Power Shift Africa, an energy think tank. "What we need now is for our leaders, particularly in Africa, to put everything in place to allow us to harness and take advantage of the renewable energy revolution."

China has installed more solar capacity than any other country in the world



African countries have abundant sunlight but limited access to cheap loans



How did solar energy become so cheap?

The first solar photovoltaic cells were invented by researchers in the US in 1954, brought to markets through subsidies in Germany in the early 2000s, and made competitively cheap on a large scale in China after that. A study published in the journal Energy Policy in 2018 found that 60% of the fall in prices between 1980 and 2012 was because of government policies that stimulated market growth, like feed-in tariffs that pay consumers for unused energy they supply to the grid.

In Germany, which has the most installed solar power per person, such policies triggered investments that, in turn, led to rapid innovations, said David Wedepohl of German solar lobby group BSW. It created incentives for manufacturers to make solar panels and build new factories and machines.

Each time solar capacity has doubled, the total price of solar energy has fallen by about 30%. Analysts call this relationship a learning curve. The more solar plants are deployed, the more the technology comes down in price — though the gains flatten out over time.

Germany's demand for solar power "not only installed a lot of solar, but it catalyzed the learning curve," said Gregory Nemet, a professor at the University of Wisconsin-Madison who has written a book on how solar energy became cheap. In China, where most of the world's solar panels are now made, production processes were refined further to bring prices down to levels that compete with coal.

Electric cars could help fluctuating energy manage supply

What is the future of solar energy?

In sunny parts of the world, average solar prices are on track to hit $0.01/kWh by 2035, according to analysis by clean energy advocate Ramez Naam in May. "In a purely open market, these incredibly low prices would drive the world's remaining coal plants into bankruptcy, and steal some of the most profitable operating hours even from cheap natural gas plants," he wrote.

But other analysts are less optimistic, questioning whether the learning rate can be applied to the total cost of solar or just the capital costs. Solar price predictions in sunny countries in the next couple of decades range from below $0.01/kWh to $0.025/kWh, which is still well below the cost of running existing coal plants.

Electricity grids must also fix problems of intermittency, said Auke Hoekstra, an electric vehicle researcher at Eindhoven University of Technology. Because skies are darker at night and in the winter, the attractiveness of solar depends on how well an electricity grid can manage demand and store energy.

The price of solar power depends on sunlight, financing and government support

What's more, as renewable energy dominates grids, it lowers electricity prices while running, which erodes revenues for suppliers. This could offset gains in technology costs if better storage or demand solutions are not found, according to a new study published in the journal Renewable Energy.

Still, progress in these fields is also accelerating. Battery technologies, for instance, are making similarly rapid progress to solar, said Nemet, and electric vehicles could be charged at night as a way of spreading out demand. Access to cheap, abundant solar energy "gives us a tool that we didn't have in the past."

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