Switzerland wants to advance global talks on whether controversial solar geoengineering techniques should be used to compensate for climate change by cooling down the earth.
It is proposing to create the first United Nations expert group to “examine risks and opportunities” of solar radiation management (SRM), a suite of largely untested technologies aimed at dimming the sun.
The panel would be made up of experts appointed by member states of the UN’s environment programme (Unep) and representatives of international scientific bodies, according to a draft resolution submitted by Switzerland and seen by Climate Home.
Governments will negotiate and vote on the proposal at Unep’s annual meeting due to start next week in Nairobi, Kenya. It has been formally endorsed by Senegal, Georgia, Monaco and Guinea.
A Swiss government spokesperson told Climate Home that SRM is “a new topic on the political agenda” and Switzerland is “committed to ensuring that states are informed about these technologies, in particular about possible risks and cross-border effects”.
Split scientific opinions
Solar geoengineering is a deeply contested topic and scientists are divided over whether it should be explored at all as a potential solution.
Ines Camilloni, a climatology professor at the University of Buenos Aires, welcomed Switzerland’s proposal, saying the UN “is in a good position to facilitate equitable, transparent, and inclusive discussions”.
“There is an urgent need to continue researching the benefits and risks of SRM to guide decisions around research activities and deployment”, she told Climate Home.
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But Carl-Friedrich Schleussner, head of climate science at Climate Analytics, says he is concerned about that prospect.
“The risk of such an initiative is that it elevates SRM as a real solution and contributes to the normalisation of something that is still very premature and hypothetical from a scientific perspective”, he added. “You need to be careful about unintended consequences and consider the risks of opening a Pandora’s box”.
An open letter signed by more than 400 scientists in 2022 called for an international “non-use agreement” on solar geoengineering. It also said United Nations bodies, including Unep, “are all incapable of guaranteeing equitable and effective multilateral control over the deployment of solar geoengineering technologies at planetary scale”.
Poorly understood risks
Long touted as a futuristic climate hack, solar geoengineering has risen in prominence in recent years as the prospect of curbing emissions enough to limit global warming to 1.5C has faded.
The technologies aim to reduce the amount of sunlight reaching the planet’s surface. This could be achieved by pumping aerosols into the high atmosphere or by whitening clouds.
Its supporters say it could be a relatively cheap and fast way to counter extreme heat. But it would only temporarily reduce the impact of rising emissions, without tackling the root causes.
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The regional effects of manipulating the weather are hard to predict and large uncertainties over wider climate, social and economic implications remain.
Solar geoengineering could “introduce a widespread range of new risks to people and ecosystems, which are not well-understood”, the IPCC’s scientists said in their latest assessment of climate science.
Its critics argue that putting the SRM option on the table undermines existing climate policies and relieves pressure on polluters to reduce emissions as quickly as possible. There are also questions about how long this technology would be needed and what happens after it is stopped.
Space for discussion
In its proposal to the Unep assembly, Switzerland acknowledges the “potential global risks and adverse impacts”.
The 25-people-strong group would first be tasked with writing a comprehensive scientific report on solar geoengineering.
But the main goal would be to establish “a space for an informed discussion” about research on the potential use of SRM, giving the possibility for future decisions on how that should be governed, according to an accompanying technical note seen by Climate Home.
It is not the first time Switzerland brings a resolution on solar geoengineering to the Unep summit. In 2019, its attempt to get countries to agree to the development of a governance framework failed as a result of opposition from Donald Trump’s USA and Saudi Arabia – who didn’t want restrictions on geoengineering.
Calls for more research
Last year, Unep produced an “independent expert review” of the subject, concluding that “far more research” is needed “before any consideration for potential deployment” of SRM.
A Unep spokesperson said the exact characteristics of the group proposed by Switzerland would need to be negotiated at the upcoming summit. But, if approved, it would differ from any previous panel “because it would have a clear mandate from member states” with experts directly appointed by them.
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Ines Camilloni was one of the authors of last year’s UNEP report. She says “managing the risks of climate change requires a portfolio of policy responses”, of which mitigation and adaptation would be the most important and urgent.
But she added that “SRM has been proposed as a complementary approach” and more research is needed to weigh its benefits and risks against the impact of adverse climate scenarios.
A panel of leaders called the Overshoot Commission also recommended last year that governments expand research into solar geoengineering while placing a moratorium on large-scale experiments outdoors.
A rogue SRM experiment conducted by a US startup in Mexico led the Mexican government to announce a ban on solar geoengineering in January 2023.
‘Precautionary approach’
Mary Church, a campaigner at the CEnter for International Environmental Law, says “it’s hard to see what could be gained from establishing an expert group under Unep”.
“There’s a real risk that such a group could undermine the existing regulatory framework and inadvertently provide legitimacy for solar geoengineering technology development and experimentation”.
Countries should instead “take a precautionary approach, commit to non-use, and prioritise a fast, fair and funded phase out of fossil fuels”, she added.
The post Switzerland proposes first UN expert group on solar geoengineering appeared first on Climate Home News.
Switzerland proposes first UN expert group on solar geoengineering
Climate Change
Early warning systems are saving lives in Central Asia
In recent years, the monsoon season in Pakistan has taken a new and dangerous turn.
July and August typically bring high levels of rainfall across the country, and while flooding isn’t uncommon, the extent and severity could be readily predicted.
These patterns have now changed. In 2022, extreme rainfall swept Pakistan and huge swathes of the country were under water. Sindh province experienced levels of rain 508% above average for the time of year.
Extreme weather in Pakistan is becoming the norm. The past 15 years have brought widespread flooding, loss of life and billions in financial costs. A post-disaster report, produced by the Pakistan Government, stated that the 2022 floods were “a wake-up call for systemic changes to address the underlying vulnerabilities to natural hazards”, citing the country’s lack of climate-resilient infrastructure.
But heavy rainfall is only one of the water-related issues that Pakistan faces. In a country with huge geographical diversity, from sweltering deserts to freezing mountain tops, the water stresses are equally as varied. In many regions the key concern is a lack of reliable, clean water that can be used to grow crops and feed families.
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The risks of the Indus
The Indus River plays a critical role in Pakistan. This major artery travels almost the entire length of the country, an estimated 2,000 km, from the Himalayas to the Arabian Sea. It is a crucial economic lever, supporting nearly 90% of Pakistan’s food production and 25% of its overall GDP. What happens to this river – both human and natural impacts – has huge consequences for the rest of the country.
The government and civil society agree that urgent action is required to protect Pakistan’s fragile water resources. A new adaptation project – SAFER Pakistan – is seeking to address these concerns with solutions that can be used to solve similar climate-related issues elsewhere.
The US$ 10 million project is led by ICIMOD, an intergovernmental research centre, alongside UNICEF, and financed by the Adaptation Fund. The intention is to tackle six key issues that people face in the Indus Basin: cryosphere risks, drying springs, groundwater, pollution, unsustainable water use, and community resilience.
In practice this means exploring different solutions that put communities in control of their own adaptive capacity. One solution under development is the use of community early warning systems.
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A warning sign
According to researchers, early warning systems “aim to empower affected communities against hazards and help them to sufficiently prepare before disasters strike.”
The northern provinces of Pakistan – Gilgit-Baltistan and Khyber Pakhtunkhwa – are the main focus for testing these systems. In this mountainous region the Indus is fed by thousands of glaciers which sustain water flow during the dry season. At the same time, increased temperatures and unpredictable weather patterns are changing how these glaciers behave, leading to avalanches, increased snowmelt, and landslides.
As glaciers start to melt due to climate change, they can form large lakes high up on the mountain that can pose a serious threat to the communities living below. When these natural dams fail, huge quantities of water come careening down the mountain, a phenomenon called glacial lake outburst flood.
The SAFER project is exploring how to use local knowledge and observations of the mountain to ensure people know how and when to evacuate when these outbursts occur. This human intelligence will be combined with data from remote sensors to save lives and livelihoods. In total, over 435,000 people will be impacted by the project.
“Early warning systems often serve as the backbone of a multi-faceted response to reduce climate disaster risk,” commented Mikko Ollikainen, head of the Adaptation Fund. “But local information is often just as valuable as the real-time data you receive from sensors or satellites,” he added.
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Shaping an effective response
Community early warning systems – together with other preventive adaptation measures – are proving a popular solution to extreme weather events.
A separate adaptation project in the mountains of Central Asia is grappling with the same problem of glacial flooding. In this case, with US$6.5 million in funding from the Adaptation Fund, UNESCO has been implementing early warning systems across Kazakhstan, Kyrgyzstan, Tajikistan and Uzbekistan for the past five years, with considerable success.
Diana Aripkhanova, a project officer at UNESCO, and based in Kazakhstan, told Climate Home that glacier lake outburst floods “represent an increasing climate-related hazard across the high mountain regions of Central Asia”.
“These events can trigger destructive floods and debris flows that affect downstream communities, infrastructure, and livelihoods,” she added.
The project utilises real-time data drawn from weather monitoring stations with community preparedness to shape a fast and effective response to life-threatening flooding. This includes training people on evacuation routes, safe locations and simulation drills. In addition, the project has tried preventative measures such as planting hundreds of trees in valleys prone to landslides to provide greater stabilisation.
In total, four early warning systems have been installed across the four countries involved in the project covering seven high-risk areas. As a result, UNESCO estimates these systems are protecting over 100,000 people.
“Early warning systems are a key risk reduction measure, allowing communities to evacuate in time and reduce potential loss of life and damage to assets,” added Aripkhanova.
Community participation
The active role of each community is built into these interventions. Ensuring local people are core contributors is seen as crucial to building long-term climate resilience.
These communities are witnessing the threats from climate change materialise on a yearly basis, and researchers are now tapping into that understanding when implementing adaptation projects.
After the 2022 floods, Pakistan’s development minister, Ahsan Iqbal, wrote that “there is an opportunity to do things differently” and that “enhancing Pakistan’s resilience to shocks and stresses amidst climate change, especially for the poorest…is essential for the country’s future.”
The climate shocks remain as strong as ever, but using the right tools and simple solutions can soften the blow when they occur.
Adam Wentworth is a freelancer writer based in Brighton, UK
The post Early warning systems are saving lives in Central Asia appeared first on Climate Home News.
Climate Change
Earth’s Greatest Underwater Migrations Are Disappearing
From the Amazon to the Mekong, migratory freshwater fish underpin food security for millions, but over 300 species need urgent conservation intervention, warns a new UN report.
Beneath the surface of the planet’s rivers and lakes, the historically heaving migrations of freshwater fish are thinning out. The blubbery-lipped Siamese giant carp of Asia’s Mekong River, the mottled brown goonch of India’s Ganges and the ancient-in-appearance beluga sturgeon of Europe’s Danube River are declining.
Climate Change
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