Early-stage research into ways to limit the impact of climate change on the Great Barrier Reef is being approved in a "policy vacuum", potentially limiting risk assessments and undermining public support, researchers say.
So-called geoengineering to draw down carbon dioxide or mask the effect of a warming planet has begun to draw science funding, including for three projects to protect Australia's largest network of coral reefs.
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| Increasing cloud cover to help cool the Great Barrier Reef is one type of geoengineering being considered for testing. Credit: Photo: Bloomberg |
However, "the current laws do not guarantee robust governance for field testing of these technologies," according to a paper published in the Climate Policy journal. "Nor do they provide the foundation for a more coherent national policy on climate intervention technologies more generally."
Of the three reef-related projects with feasibility study approval, two will start very small.
One involves spraying a biodegradable reflective surface polymer film of calcium carbonate to reflect solar radiation, while the other would pump cooler water from depths of 10 to 30 metres to ease the heat stress of surface corals.
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| Funding has been awarded for feasibility studies of three geoengineering technologies to protect the reef: (1) a ‘floating sunshield’ of reflective surface film made of calcium carbonate to reflect sunlight and lower water temperatures; (2) marine cloud brightening; and (3) water mixing. Credit: Climate Policy |
"Australia currently has no national law or policy governing geoengineering or solar radiation management, or even on how such activities might fit within national climate response strategy," the paper notes.
Jan McDonald, a professor of environmental and climate law at the University of Tasmania and the paper's lead author, said the "prognosis [for the reef] is looking pretty grim", with scientists estimating most of the world's corals will be lost even if global warming is kept to the low end of the Paris climate goal of 1.5 to 2 degrees.
As a result, it is inevitable climate interventions will be tried even without dodging our "serious obligation to reduce carbon dioxide", Professor McDonald said.
The experience in Britain, where a government-funded project aimed at assessing the feasibility of injecting particles into the stratosphere was halted in 2012, suggested public consultation and transparency were needed at the start,'' she said. Without that, the public trust in regulators or the research would be lost, "probably a dangerous path to go down".
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| Bleaching of the Great Barrier Reef corals in 2017, the second year of unprecedented back-to-back mass bleaching. Credit: AAP |
Federal Environment Minister Melissa Price was contacted for comment.
Labor environment spokesman Tony Burke said: "We are the custodians of the planet’s most precious and most vulnerable environmental asset.
"If we win the election, then we would listen to the experts both on individual projects and the overall framework for protecting the Great Barrier Reef."
Greens spokeswoman on the Great Barrier Reef Larissa Waters noted that a Nature paper published last week found 89 per cent of new corals were not surviving.
"[That] made it clear restoration and other projects aren’t enough – there must be urgent action to reverse climate change," Senator Waters said.
"There should be an assessment framework for geoengineering experiments to ensure new problems aren’t being created."
Links
- Climate Policy: Governing geoengineering research for the Great Barrier Reef
- Geoengineering the Great Barrier Reef needs strong rules
- Impacts of stratospheric aerosol geoengineering strategy on Caribbean coral reefs
- The Dependency of People on the Great Barrier Reef, Australia
- Assessment and Promotion of the Great Barrier Reef's Human Dimensions Through Collaboration
- 'Shocking' coral spawning drop raises doubts over Great Barrier Reef's resilience
- These residents stopped a coal mine, made history and sent ripples through boardrooms around the world
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