02/12/2019
- World’s largest coal consumer shows little sign of ending its dependency even though it is also the biggest market for renewable energy sources
- UN climate summit is meeting to discuss ways to limit future warming, but hopes are fading that China will commit to further curbs on emissions
China now accounts for around 30 per cent of the world’s carbon emissions. Photo: AP
As world leaders gather in Spain to discuss how to slow the warming of the planet, the spotlight has fallen on China – the top emitter of greenhouse gases.
China burns about half the coal used globally each year. Between 2000 and 2018, its annual carbon emissions nearly tripled, and it now accounts for about 30 per cent of the world’s total.
Yet it is also the leading market for solar panels, wind turbines and electric vehicles, and it manufactures about two-thirds of solar cells installed worldwide.
“We are witnessing many contradictions in China’s energy development,” said Kevin Tu, a Beijing-based fellow with the Centre on Global Energy Policy at Columbia University. “It’s the largest coal market and the largest clean energy market in the world.”
That apparent paradox is possible because of the sheer scale of China’s energy demands.
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But as China’s economy slows to the lowest level in a quarter century – around 6 per cent growth, according to government statistics – policymakers are doubling down on support for coal and other heavy industries, the traditional backbones of China’s energy system and economy. At the same time, the country is reducing subsidies for renewable energy.
At the annual United Nations climate summit, this year in Madrid, government representatives will put the finishing touches on implementing the 2015 Paris Agreement, which set a goal to limit future warming to 1.5 to 2 degrees Celsius above pre-industrial levels.
Nations may decide for themselves how to achieve it.
China had previously committed to shifting its energy mix to 20 per cent renewables, including nuclear and hydroelectric energy.
Climate experts generally agree that the initial targets pledged in Paris will not be enough to reach the goal, and next year nations are required to articulate more ambitious targets.
Hopes that China would offer to do much more are fading.
Recent media reports and satellite images suggest that China is building or planning to complete new coal power plants with total capacity of 148 gigawatts – nearly equal to the entire coal-power capacity of the European Union within the next few years, according to an analysis by Global Energy Monitor, a San Francisco-based non-profit.
China is the world’s leading market for wind turbines and other renewables – but is still a major source of emissions. Photo: Chinatopix via AP
Meanwhile, investment in China’s renewable energy dropped almost 40 per cent in the first half of 2019 compared with the same period last year, according to Bloomberg New Energy Finance, a research organisation. The government slashed subsidies for solar energy.
Last week in Beijing, China’s vice-minister of ecology and environment told reporters that non-fossil-fuel sources already account for 14.3 per cent of the country’s energy mix. He did not indicate that China would embrace more stringent targets soon.
“We are still faced with challenges of developing our economy, improving people’s livelihood,” Zhao Yingmin said.
As a fast-growing economy, it was always inevitable that China’s energy demands would climb steeply. The only question was whether the country could power a sufficiently large portion of its economy with renewables to curb emissions growth.
Many observers took hope from a brief dip in China’s carbon emissions between 2014 and 2016. Today the country’s renewed focus on coal comes as a disappointment.
“Now there’s a sense that rather than being a leader, China is the one that is out of step,” said Lauri Myllyvirta, lead analyst at the Centre for Research on Energy and Clean Air in Helsinki.
He notes that several developed countries – including Germany, South Korea and the United States – are rapidly reducing their reliance on coal power.
After climbing sharply for two decades, China’s emissions stalled around 2013 and then declined slightly in 2015 and 2016, according to Global Carbon Budget, which tracks emissions worldwide.
This dip came as Chinese leaders declared a “war on pollution” and suspended the construction of dozens of planned coal power plants, including some in Shanxi.
Pollution scandal near China nature reserve at Tengger desert’s edge
At the same time, the government required many existing coal operators to install new equipment in chimneys to remove sulphur dioxide, nitrous oxide and other hazardous substances. About 80 per cent of coal plants now have scrubbers, said Alvin Lin, Beijing-based China climate and energy policy director for the Natural Resources Defence Council, a non-profit.
As a result, the air quality in many Chinese cities, including Beijing, improved significantly between 2013 and 2017. Residents long accustomed to wearing face masks and running home air-filter machines enjoyed a reprieve of more “blue sky days,” as low-pollution days are known in China.
In the past three years, China’s carbon emissions have begun to rise again, according to Global Carbon Budget.
The coming winter in Beijing may see a return of prolonged smog, as authorities loosen environmental controls on heavy industry – in part to compensate for other slowing sectors in the economy.
The UN Climate Change Conference is taking place in Madrid this month. Photo: AFP
Permits for new coal plants proliferated after regulatory authority was briefly devolved from Beijing to provincial governments, which see construction projects and coal operations as boosts to local economies and tax bases, said Ted Nace, executive director of Global Energy Monitor.
“It’s as though a boa constrictor swallowed a giraffe, and now we’re watching that bulge move through the system,” said Nace. In China, it takes about three years to build a coal plant.
The world has already warmed by 1 degree Celsius. All scenarios envisioned by the Intergovernmental Panel on Climate Change for holding planetary warming to around 1.5 degrees Celsius involve steep worldwide reductions in coal-power generation.
In that effort, other countries rely on Chinese manufacturing to hold down prices on solar panels. wind turbines and lithium-ion batteries.
“China has a really mixed record. On the one hand, it’s seen rapidly rising emissions over the past two decades,” said Jonas Nahm, an energy expert at Johns Hopkins University.
“On the other hand, it’s shown it’s able to innovate around manufacturing – and make new energy technologies available at scale, faster and cheaper.”
Source: SCMP
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04/09/2019
- Research sheds light on 500-year Chinese weather cycle and suggests a cool change could be on the way
- Findings leave no room for complacency or inaction
A team of Chinese researchers says a period of global cooling could be on the way, but the consequences will be serious. Photo: Xinhua
A new study has found winters in northern China have been warming since 4,000BC – regardless of human activity – but the mainland scientists behind the research warn there is no room for complacency or inaction on climate change, with the prospect of a sudden global cooling also posing a danger.
The study found that winds from Arctic Siberia have been growing weaker, the conifer tree line has been retreating north, and there has been a steady rise in biodiversity in a general warming trend that continues today. It appears to have little to do with the increase in greenhouse gases which began with the industrial revolution, according to the researchers.
Lead scientist Dr Wu Jing, from the Key Laboratory of Cenozoic Geology and Environment at the Institute of Geology and Geophysics, part of the Chinese Academy of Sciences, said the study had found no evidence of human influence on northern China’s warming winters.
“Driving forces include the sun, the atmosphere, and its interaction with the ocean,” Wu said. “We have detected no evidence of human influence. But that doesn’t mean we can just relax and do nothing.”
Moon Lake, a small volcanic lake hidden in the deep forest of China’s Greater Khingan Mountain Range, where a team of scientists spent more than a decade studying the secrets hidden in its sediments. Photo: Baidu
Wu and her colleagues are concerned that, as societies grow more used to the concept of global warming, people will develop a misplaced confidence in our ability to control climate change. Nature, they warned, may trick us and might catch us totally unprepared – causing chaos, panic, famine and even wars as the global climate system is disrupted.
There are already alarming signs, according to their paper, which has been accepted for publication by the online Journal of Geophysical Research: Atmospheres.
Wu and her colleagues spent more than a dozen years studying sediments under Moon Lake, a small volcanic lake hidden in the deep forests of the Greater Khingan Mountain Range in China’s Inner Mongolia autonomous region. They found that winter warming over the past 6,000 years had not been a smooth ride, with ups and downs occurring about every 500 years.
Their findings confirmed an earlier study by a separate team of Chinese scientists, published by online journal Scientific Reports in 2014, which first detected the 500-year cyclical pattern of China’s summer monsoons and linked it to solar activity.
The 2014 research, which drew on 5,000 years’ worth of data, suggested the current warm phase of the cycle could terminate over the next several decades, ushering in a 250-year cool phase, potentially leading to a partial slowdown in man-made global warming.
Wu said the latest study, with 10,000 years’ worth of new data, not only helped to draw a more complete picture of the 500-year cycle, but also revealed a previously unknown mechanism behind the phenomenon, which suggested the impact of the sun on the Earth’s climate may be greater than previously thought.
According to Wu, the variation in solar activity alone was usually not strong enough to induce the rapid changes in vegetation the research team recorded in the sediment cores of Moon Lake. Instead, the scientists found the warming impact was amplified by a massive, random interaction between surface seawater and the atmosphere in the Pacific Ocean known as the El Nino-Southern Oscillation.
As a result of the research findings, Wu said she was now more worried about cooling than warming.
“A sharp drop of temperature will benefit nobody. The biggest problem is, we know it will come, but we don’t know exactly when.”
Source: SCMP
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29/04/2019
-
- Fusion reactor built by Chinese scientists in eastern Anhui province has notched up a series of research firsts
- There are plans to build a separate facility that could start generating commercially viable fusion power by 2050, official says
The Experimental Advanced Superconducting Tokamak (EAST) device – or “artificial sun” – in Hefei, Anhui province. Photo: AFP/Chinese Academy of Sciences
A groundbreaking fusion reactor built by Chinese scientists is underscoring Beijing’s determination to be at the core of clean energy technology, as it eyes a fully functioning plant by 2050.
Sometimes called an “artificial sun” for the sheer heat and power it produces, the doughnut-shaped Experimental Advanced Superconducting Tokamak (EAST) that juts out on a spit of land into a lake in eastern Anhui province, has notched up a succession of research firsts.
In 2017 it became the world’s first such facility to sustain certain conditions necessary for nuclear fusion for
, and last November hit a
of 100 million degrees Celsius (212 million Fahrenheit) – six times as hot as the sun’s core.
Such mind-boggling temperatures are crucial to achieving fusion reactions, which promise an inexhaustible energy source.
EAST’s main reactor stands within a concrete structure, with pipes and cables spread outward like spokes connecting to a jumble of censors and other equipment encircling the core. A red Chinese flag stands on top of the reactor.
A vacuum vessel inside the fusion reactor, which has achieved a temperature of 100 million degrees Celsius – six times as hot as the sun’s core. Photo: AFP/Chinese Academy of Sciences
“We are hoping to expand international cooperation through this device [EAST] and make Chinese contributions to mankind’s future use of nuclear fusion,” said Song Yuntao, a top official involved in the project, on a recent tour of the facility.
China is also aiming to build a separate fusion reactor that could begin generating commercially viable fusion power by mid-century, he added.
Some 6 billion yuan (US$891.5 million) has been promised for the ambitious project.
EAST is part of the International Thermonuclear Experimental Reactor (ITER) project, which seeks to prove the feasibility of fusion power.
Funded and run by the European Union, India, Japan, China, Russia, South Korea and the United States, the multibillion-dollar project’s centrepiece will be a giant cylindrical fusion device, called a tokamak.
Now under construction in Provence in southern France, it will incorporate parts developed at the EAST and other sites, and draw on their research findings.
China is “hoping to expand international cooperation” through EAST. Photo: Reuters
Fusion is considered the Holy Grail of energy and is what powers our sun.
It merges atomic nuclei to create massive amounts of energy – the opposite of the fission process used in atomic weapons and nuclear power plants, which splits them into fragments.
Unlike fission, fusion emits no greenhouse gases and carries less risk of accidents or the theft of atomic material.
But achieving fusion is both extremely difficult and prohibitively expensive – the total cost of ITER is estimated at €20 billion (US$22.3 billion).
Wu Songtao, a top Chinese engineer with ITER, conceded that China’s technical capabilities on fusion still lag behind more developed countries, and that US and
Japanese tokamaks have achieved more valuable overall results.
But the Anhui test reactor underlines China’s fast-improving scientific advancement and its commitment to achieve yet more.
China’s capabilities “have developed rapidly in the past 20 years, especially after catching the ITER express train”, Wu said.
In an interview with state-run Xinhua news agency in 2017, ITER’s director general Bernard Bigot lauded China’s government as “highly motivated” on fusion.
“Fusion is not something that one country can accomplish alone,” Song said.
“As with ITER, people all over the world need to work together on this.”
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