Some good news for a change: Australia’s greenhouse gas emissions are set to fall



Renewable energy being installed at a community in the Northern Territory. Researchers have predicted Australia’s emissions are set to fall, but warn the renewables deployment rate must continue.
Lucy Hughes-Jones/AAP

Andrew Blakers, Australian National University and Matthew Stocks, Australian National University

For the past few years, Australia’s greenhouse gas emissions have headed in the wrong direction. The upward trajectory has come amid overwhelming evidence that the world must bring carbon dioxide emissions down. But the trend is set to change.

In a policy brief released today, we predict that Australia’s greenhouse gas emissions will peak during 2019-20 at the equivalent of about 540 million tonnes of carbon dioxide.

After a brief plateau, we expect they will decline by 3-4% over 2020-22, and perhaps much more in the following years – if backed by government policy.

The peak will occur because Australia’s world-leading deployment of solar and wind energy is displacing fossil fuel combustion. Emissions from the electricity sector are about to fall much faster than increases in emissions from all other sectors combined.

This is a message of hope for rapid reduction of emissions at low cost. But we cannot rest on our laurels. If renewable energy deployment stops or slows, emissions may rise again.

Figure 1: Historical and projected total Australian emissions in megatonnes of CO2 (equivalent) per year. Black line: Government emissions projections which assume solar and wind deplpoyment almost stops. Green line: Deployment continues at the current rate.
ANU

Australia: a renewables superstar

Deployment of solar and wind energy is the cheapest and quickest way to make deep emissions cuts because of its low and falling cost. Higher deployment rates would yield deeper emissions cuts, but this requires supportive government policy.

Wind and solar constitute about two-thirds of global net new electricity capacity. Gas, hydro and coal comprise most of the balance. Solar and wind comprise virtually all new generation capacity in Australia because they are cheaper than alternatives.




Read more:
Australia is the runaway global leader in building new renewable energy


Australia is a global renewable energy superstar because it is installing new solar and wind capacity four to fives times faster per capita than China, the European Union, Japan or the United States. This allows Australia to stabilise and then reduce its greenhouse emissions and sends a globally important message.

Figure 2 shows the rapid increase in the proportion of solar and wind energy from 2018 in the National Electricity Market, which covers the eastern states and comprises about 85% of national electricity generation. The proportion of renewable energy generation has reached 25%, including hydro.

Figure 2: Monthly solar and wind fraction of electricity generation in the NEM over 2014-19 showing sharp increase in 2018.
ANU

We are confident Australia’s emissions will fall in 2020, 2021 and probably 2022 because 16-17 gigawatts of wind and solar is locked in for deployment in 2018-20. This reduces emissions in the electricity sector by about 10 million tonnes a year.

The federal government projects that emissions outside the electricity system will increase by about 3 million tonnes per year on average over the 2020s. The difference leaves an overall decline of 7 million tonnes of emissions per year.

100% clean electricity is within our grasp

Beyond our projections for the next few years, continued falls in emissions are not assured. The emissions trajectory for 2022 and beyond depends largely on the level of renewables deployed.

Federal government projections assume solar and wind deployment almost stops in the 2020s. This would mean annual emissions increase from current levels to 563 million tonnes in 2030.

Wind turbines adjacent to the Tesla batteries at Jamestown, north of Adelaide, in 2017.
DAVID MARIUZ/AAP

But it doesn’t need to be this way. If the current renewables deployment rate continued, Australia would reach 50% renewable electricity in 2024, and potentially 80% renewables in 2030. This transformation would be technically straightforward and affordable. It requires governments, mostly the federal government, to encourage more transmission power lines to deliver renewable electricity to where it’s needed. Other off-the-shelf methods to support renewables include energy storage such as pumped hydro and batteries, and managing electricity demand.

The benefits of a consistent renewables rollout would be large. Australia’s electricity emissions in 2030 would be 100 million tonnes lower than government projections and the nation would meet its Paris target of a 26-28% emissions reduction between 2005 and 2030. This could be achieved without the controversial proposal to carry over carbon credits earned in the Kyoto Protocol period.

It should be noted that changes in land clearing rates or coal and gas mining or economic activity would also affect future national emissions.

Electricity infrastructure at the Snowy Hydro scheme. Such hydro projects are key to firming up intermittent renewable energy.
Lukas Coch/AAP

The emissions road ahead

Continued rapid deployment of solar and wind requires that governments enable construction of adequate electricity transmission and storage.

State governments should also continue efforts to establish renewable energy zones, with or without cooperation from the federal government. These zones would be located where there is good wind, sun and pumped hydro energy storage, bringing sustainable investment and jobs to regional areas.




Read more:
Governments took the hard road on clean energy – and consumers are feeling the bumps


In the longer term, solar and wind can cut national emissions by two-thirds. Beyond the electricity sector, this involves electrifying motor vehicles, residential heating and cooling and industrial heating. National emissions could be cut by another 10% by stopping exports of fossil fuels, which creates fugitive emissions.

It is clear that solar and wind are the most practical route, globally and in Australia, to cheap, rapid and deep emissions cuts – and government policy will be key.The Conversation

Andrew Blakers, Professor of Engineering, Australian National University and Matthew Stocks, Research Fellow, ANU College of Engineering and Computer Science, Australian National University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Australia falls further in rankings on progress towards UN Sustainable Development Goals


John Thwaites, Monash University and Tahl Kestin, Monash University

Australia is performing worse than most other advanced countries in achieving the Sustainable Development Goals (SDGs), according to the global SDG Index, which compares different nations’ performance on the goals.

According to the SDG Index, released yesterday in New York, Australia is ranked 37th in the world – down from 26th last year, and behind most other wealthy countries including New Zealand, Canada, the United States and the United Kingdom.

The best-performing countries are the northern European nations of Sweden, Denmark, Finland and Germany, all of which have a history of balancing economic, social and environmental issues.

The SDG Index measures progress against the 17 SDGs agreed by all countries at the United Nations in 2015. The goals encompass a set of 169 targets to be met by 2030 to achieve economic prosperity, social inclusion and environmental sustainability.

Yet despite the progress made by some countries, all nations still have a way to go to achieve all of the goals.




Read more:
Explainer: the world’s new sustainable development goals


Australia: the world’s worst on climate action

The latest SDG Index shows that Australia is performing relatively well in areas such health and wellbeing, and providing good-quality education. But its results for the environmental goals and climate change are among the worst in the OECD group of advanced nations.

The new index ranks Australia as the worst-performing country in the world on climate action (SDG 13). The measure takes into account greenhouse gas emissions within Australia; emissions embodied in the goods we consume; climate change vulnerability; and exported emissions from fossil fuel shipments to other countries.

One of the reasons why Australia has slumped so far in the rankings is that the SDG Index is now taking into account the so-called “spillover” effects that countries have on other nations’ ability to meet the SDGs. These effects may be positive, such as providing development aid; or negative, such as importing or exporting products that create pollution.

The report shows that G20 nations account for the largest negative economic, environmental, and security spillover effects. Despite being among the richest nations in the world, the US, the UK and Australia are rated worst in the G20 for negative spillovers.

The UK, for instance, rates particularly badly on the tax haven score, which makes it harder for other countries to raise the tax revenue needed to provide health, education and other services to their citizens.

This year’s SDG Index also includes a key environmental spillover indicator: carbon dioxide emissions embodied in fossil fuel exports, calculated using a three-year average of coal, gas and oil exports.

Australia’s annual exported CO₂ emissions are a colossal 44 tonnes per person. This outstrips even Saudi Arabia (35.5 tonnes per person), and is orders of magnitude larger than the figure for the US (710kg per person).

G20 leading the way?

With all countries still falling short of achieving the SDGs, the SDG Index also assesses what actions G20 governments are taking to help close this gap. Most G20 countries have begun to implement the goals but there are large variations among G20 countries in how the SDGs are being embraced by political leaders and translated into action.

Composite score of national coordination and implementation mechanisms for the SDGs in G20 countries.
SDSN and Bertelsmann Stiftung, 2018 SDG Index and Dashboards Report

Brazil, Mexico and Italy have taken the most significant steps among G20 countries to achieve the goals, illustrated for instance by the existence of SDG strategies, coordination units in governments, or online platforms. India and Germany have at least partially already undertaken an assessment of investment needs.

According to this assessment, Australia has taken some initial steps to support SDG implementation. Supportive actions taken by the government include setting up a cross-departmental committee, co-chaired by the Department of Foreign Affairs and Trade and the Department of Prime Minister and Cabinet, to coordinate Government SDG activities. The Senate has established an inquiry to examine the opportunities to implement the goals.

Significantly, the federal government has also prepared a Voluntary National Review report on progress in implementing the goals, which it will present to the UN’s High Level Political Forum next week. The report addresses how Australia is performing against each of the goals and includes many case studies of implementation from business, civil society, academia, youth and all levels of government. It is accompanied by a new Australian SDG case study hub. Many of these activities occurred after the cut-off period for the SDG Index, so Australia’s overall performance on SDG implementation is actually higher than the SDG Index gives it credit.

However, Australia is not taking more deliberative action to address the SDGs, such as developing a national implementation plan or setting aside funding for SDG implementation. Nor are individual departments identifying the gaps in Australia’s SDG performance and identifying what they plan to do differently to address them.

The ConversationGiven Australia’s poor performance on some of the SDGs there is clearly a need for targeted action if we are to achieve the goals by the 2030 deadline.

John Thwaites, Chair, Monash Sustainable Development Institute & ClimateWorks Australia, Monash University and Tahl Kestin, Sustainable Development Solutions Network Manager, Monash Sustainable Development Institute, Monash University

This article was originally published on The Conversation. Read the original article.

Climate and the rise and fall of civilizations: a lesson from the past


Andrew Glikson, Australian National University

2015 will likely be the hottest year on record, beating the previous record set only in 2014. It is also likely to be the first year the global average temperature reaches 1℃ above pre-industrial temperatures (measured from 1880-1899). Global warming is raising temperatures, and this year’s El Niño has pushed temperatures higher still.

Although 2015 is unusually hot, 1℃ symbolically marks the halfway point to 2℃, widely considered to be the threshold of “dangerous” climate change. In fact an additional 0.5-1℃ is actually masked by sulphur aerosols which we have added to the atmosphere alongside greenhouse gases.

A temperature level of 1℃ (above pre-industrial levels) is similar to or warmer than the peak temperatures of the early Holocene epoch approximately 8,000-7,200 years ago. Studies of the early Holocene provide clues to what was such a world like.

The climate roller-coaster

The last ice age (or Last Glacial Maximum) peaked around 26,000 years ago. The earth warmed over the coming millennia, driven by an increase in radiation from the sun due to changes in the earth’s orbit (the Milankovic cycles) amplified by CO₂ released from warming water, which further warmed the atmosphere.

But even as the earth warmed it was interrupted by cooler periods known as “stadials”. These were caused by melt water from melting ice sheets which cool large regions of the ocean.

Marked climate variability and extreme weather events during the early Holocene retarded development of sustainable agriculture.

Sparse human settlements existed about 12,000 – 11,000 years ago. The flourishing of human civilisation from about 10,000 years ago, and in particular from 7,000 years ago, critically depended on stabilisation of climate conditions which allowed planting and harvesting of seed and growing of crops, facilitating growth of villages and towns and thereby of civilisation.

Peak warming periods early in the Holocene were associated with prevalence of heavy monsoons and heavy floods, likely reflected by Noah’s ark story.

We can’t measure historical temperatures directly, so scientists use oxygen measurements instead. Human civilisation arose in a period of mostly settled climate.
Bruce Railback’s Geoscience Resources

Early civilisations

The climate stabilised about 7,000 – 5,000 years ago. This allowed the flourishing of civilisations along the Nile, Tigris, Euphrates, Indus and the Yellow River.

The ancient river valley civilisations cultivation depended on flow and ebb cycles, in turn dependent on seasonal rains and melting snows in the mountain sources of the rivers. These formed the conditions for production of excess food.

When such conditions declined due to droughts or floods, civilisations collapsed. Examples include the decline of the Egyptian, Mesopotamian and Indus civilisations about 4,200 years ago due to severe drought.

Throughout the Holocene relatively warm periods, such as the Medieval Warm Period (900-1200 AD), and cold periods, such as the Little Ice Age (around 1600 – 1700 AD), led to agricultural crises with consequent hunger, epidemics and wars. A classic account of the consequences of these events is presented in the book Collapse by Jared Diamond.

It’s not just Middle Eastern civilisations. Across the globe and throughout history the rise and fall of civilisations such as the Maya in Central America, the Tiwanaku in Peru, and the Khmer Empire in Cambodia, have been determined by the ebb and flow of droughts and floods.

Changing the game

Greenhouse gas levels were stable or declined between 8,000-6,000 years ago, but then began to rise slowly after 6,000 years ago. According to William Ruddiman at the University of Virginia, this rise in greenhouse gases was due to deforestation, burning and land clearing by people. This stopped the decline in greenhouse gases and ultimately prevented the next ice age. If so, human-caused climate change began much earlier than we usually think.

Rise and fall in solar radiation continued to shift the climate. The Medieval Warm Period was driven by an increase in solar radiation, while the Little Ice Age was caused at least in part by a decrease.

Now we’ve changed the game again by releasing over 600 billion tonnes of carbon into the atmosphere since the Industrial Revolution, raising CO₂ concentrations from around 270 parts per million to about 400 parts per million.

One of the consequences of this rise is an extraordinary decline in the North Atlantic Ocean Circulation as cold water from melting of Greenland ice enters the sea. This could potentially lead to a collapse of the Atlantic Meridional Ocean Circulation and a short, regional human-caused cold period, or “stadial”, mostly affecting Europe and North America, similar to those that occurred in the early Holocene.

CO2 concentrations in November 2015. The blue circle shows an area of reduced CO2 corresponding to cooler sea temperatures in the North Atlantic Ocean.
NASA, Author provided

While this may sound like “global cooling”, a cold period could have deleterious effects on agriculture and is bound to be succeeded by further warming due to the high atmospheric CO₂ concentrations.

The current shift in state of the atmosphere-ocean-ice system signifies a return to conditions such as existed at the early Holocene, which were less favourable for farming. But it doesn’t stop there.

A further rise in CO₂ and temperature would lead to conditions which existed in the Pliocene before 2.6 million years ago, including many metres of sea level rise (around 10-40 metres), posing an existential threat to the future of civilisation.


Andrew will be on hand for an Author Q&A between 2 and 3pm AEST on Friday, December 11, 2015. Post your questions in the comments section below.

The Conversation

Andrew Glikson, Earth and paleo-climate scientist, Australian National University

This article was originally published on The Conversation. Read the original article.

Camping: 9 Ways to Transition from Summer to Fall


Girly Camping®

transition from summer to fall

9 Ways to Transition from Summer to Fall

As summer is coming to an end, its time to put our bathing suits away and bust out the warmer sleeping bags to prepare for camping in the Fall. With cooler weather, shorter daylight, and more sight seeing, here are 9 ways to transition from Summer to Fall:

Experience warmer climates- Camping in the desert may be too extreme the summer but with the temperature dropping, Spring and Fall are the ultimate seasons to go camping in warmer climates.

Sip hot cocoa-Cooler weather means colder nights and what better way to warm up than with hot cocoa around the campfire!

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