The Trump administration in the US has imposed tariffs on all imports from China, Mexico and Canada, as well as on steel, aluminium and cars from around the world.
In response, the US has been hit with retaliatory tariffs from major trading partners, including the EU.
US president Donald Trump has said he intends to launch a further round of reciprocal tariffs on 2 April, targeting a broader range of countries.
This escalating “trade war” is expected to slow global growth and has also triggered warnings of a US recession.
Global energy flows and efforts to tackle climate change are already being affected by the escalating trade tensions.
The tariffs are expected to disrupt the global trade in clean technologies, from electric cars to the materials used to build wind turbines.
At the same time, as high-emitting industries face higher costs, some commentators have suggested that tariffs could hamper US plans for fossil-fuel expansion.
And as clean technology becomes more expensive to manufacture in the US, other nations – particularly China – are likely to step up to fill in any gaps.
Carbon Brief has asked a range of researchers and policy experts what they think Trump’s tariffs could mean for global climate action and energy supplies.
These are their responses, first as sample quotes, then, below, in full:
- Dr Kyle Chan: “With US automakers struggling to compete, Chinese electric vehicle companies will likely gain a stronger position.”
- Elisabetta Cornago: “China may redirect its exports towards the relatively open EU market, challenging homegrown clean-tech industries at a time when the EU is trying to support and revitalise them.”
- Dr Bentley Allan and Dr Tim Sahay: “G7 and G20 countries are strengthening their domestic economies with deficit financing and directed investments into strategic sectors, such as green and digital sectors”
- Alex Muresianu: “A less productive US economy, which must pay higher prices for key inputs, is one that can spare fewer resources to address climate change.”
- Antoine Vagneur-Jones: “The administration’s fondness for data centres requires significant grid investment and yet the US relies on its neighbours for its supply of large power transformers.”
- Jimena Blanco: “The US is mainly or wholly import-reliant for around four-fifths of its identified 50 critical minerals, including from its partners Canada and Mexico.”
- Dr Simi Thambi: “An increase in trade protectionism is not good for climate action.”
- Robert Rozansky: “One upside to Trump’s trade war is that it might stymie his efforts to push US liquified natural gas (LNG) expansion into overdrive.”
- Chris Severson-Baker: “The Canadian oil and gas lobby…has been using this moment to make the case for more oil and gas production and infrastructure.”
- Anne-Sophie Corbeau: “Trump’s tariffs have already had an impact on LNG trade…China has not imported a single US LNG cargo since 6 February.”
- Avantika Goswami: “Tariffs – if imposed widely – may hurt the exports of countries like India, which nurture aspirations to mimic China’s role as an exporter of green goods.”
- Tu Le: “If manufacturers have to move multiple factories, that changes, reduces or eliminates what would have likely been more investment in research and development for clean energy vehicles.”
- Ellie Belton: “A more unpredictable US could create opportunities for the UK and EU to attract low-carbon investment and gain a competitive edge in the energy transition.”
- Eileen Torres Morales: “The effects of Trump’s tariffs on the global transition to green iron and steelmaking are still uncertain.”
- Dr Aurélien Saussay: “When faced with increased economic pressures from tariffs, countries could be more tempted to relax environmental standards to maintain competitiveness.”
Dr Kyle Chan
Postdoctoral researcher and author of High Capacity
Trump’s tariffs will likely have wide-ranging effects on China’s clean-tech industry and global climate progress. Higher tariffs on China will directly impact US imports of Chinese clean tech goods, such as lithium batteries, which reached $1.9bn in December 2024.
Chinese solar manufacturing firms will also be hit indirectly through tariffs on production sites in south-east Asia, which collectively supplies 80% of US solar imports. Meanwhile, China’s retaliation could disrupt US access to critical minerals for its own clean-tech industry. This includes graphite for battery anodes and rare earth metals for wind turbines.
The impact on China’s electric vehicle industry in particular will be consequential, albeit less direct. Chinese electric vehicle imports to the US, which were already minimal, will not be significantly affected by Trump’s new tariffs.
However, the broader disruption to automotive supply chains across Mexico and Canada – along with rising steel and aluminium costs – will weaken the ability of US automakers to transition to electric vehicles. This will benefit Chinese electric vehicle makers, which continue to innovate and drive down costs.
With US automakers struggling to compete, Chinese electric vehicle companies will likely gain a stronger position, not just in China’s domestic market, but globally as well.
Elisabetta Cornago
Senior research fellow, EU energy and climate policy
Centre for European Reform
The Trump administration is walking back on US climate commitments, both domestically by threatening to cut back Inflation Reduction Act (IRA) support for clean-tech industries and internationally, [by] withdrawing from the Paris Agreement. US tariffs can also affect climate action and the energy transition globally, hitting global value chains for clean technologies.
The Trump administration has levied tariffs on primary materials, such as steel and aluminium, on the EU as well as on China. This will increase manufacturing costs for US-based producers of goods that rely on imports of those materials, such as wind turbines and electric vehicles.
But, at the same time, because of interconnections in global value chains, the EU will also be impacted by US tariffs that are currently limited to China.
Tariffs on Chinese exports of solar panels, electric vehicles and batteries to the US, for example, will reinforce China’s overcapacity in manufacturing in all these sectors, relative to weak Chinese demand. As a consequence, China may redirect its exports towards the relatively open EU market, challenging homegrown clean tech industries at a time when the EU is trying to support and revitalise them.
Trump’s self-harming retreat on climate and tariffs has caused uncertainty for clean energy, industry and trade. There is a macroeconomic slowdown that could negatively impact the rising green investments of the last decade.
However, countries are strategic actors, not just passive victims of US trade policy. We are observing G7 and G20 countries take anticipatory steps.
First, they are strengthening their domestic economies with deficit financing and directed investments into strategic sectors, such as green and digital sectors. A few examples:
- The monumental shift in German fiscal policy will now enable investments in climate.
- The overhaul of EU’s fiscal rules and greater funding of the EU’s industrial deal with over €100bn to support clean manufacturing.
- Brazilian president Luiz Inácio Lula da Silva has unfurled Nova Industria Brasil to build green industrialisation.
- Mexican president Claudia Sheinbaum has announced and funded Plan Mexico for strategic investments.
Many nations are also diversifying their markets and multilateralist diplomacy. Targets of Trump tariff threats are involved in a flurry of trade and investment deals:
- Within Asia, there are negotiations to green the world’s largest trade bloc – the Regional Comprehensive Economic Partnership.
- Trade deals between Mexico-EU, EU-Brazil and Canada-EU are being revamped to allow more green trade.
- Countries such as Brazil and South Africa are leading diplomatic efforts through their presidencies of BRICS and G20 this year to articulate new trading and financial architecture that gives them the policy space to pursue green structural transformation to meet domestic and global climate goals.
Alex Muresianu
Senior policy analyst
Tax Foundation
At the most basic level, gains from trade are valuable. Historically, trade barriers have slowed the spread and adoption of new technology. The fight against climate change is just one example of the many economic challenges these tariffs will make more difficult.
Tariffs on important inputs make building more expensive and distort the US economy toward less productive activity. A less productive US economy, which must pay higher prices for key inputs, is one that can spare fewer resources to address climate change.
Advocates of Trump’s approach to trade often invoke competition with China as a justification. However, most of Trump’s tariffs are targeted at allied or friendly nations, such as Canada, Mexico and members of the EU. US policymakers are worried about losing an innovation race with China in areas like electric vehicles or other green technologies, but putting up barriers to other markets will make us less – not more – competitive in the long term.
Antoine Vagneur-Jones
Head of trade and supply chains
BloombergNEF
The tariffs jar with priorities that are – at least rhetorically – at the heart of the Trump presidency.
The administration’s fondness for data centres requires significant grid investment and yet the US relies on its neighbours for its supply of large power transformers. Expanding manufacturing is another apparent priority, but increasing the cost of inputs will crimp domestic industry.
And by hurting cross-border value chains and taxing imported crude, the tariffs could conceivably disadvantage traditional internal combustion engine vehicles more than their electrified equivalents.
Jimena Blanco
Chief analyst
Verisk Maplecroft
Against a background of tariffs and disrupted trading relationships, we are seeing a more protectionist stance towards critical minerals emerging, further complicating clean-tech supply chains.
Our research shows resource nationalism is accelerating. Among the emerging markets, 17 major critical mineral producers have seen a significant increase in risk in the past five years, including Chile and Peru – both key sources of lithium and copper.
Exact details of the new US tariff regime won’t be known until 2 April, but it is likely that the next batch of tariffs will be levied most heavily on countries with the largest trade imbalances. These countries represent the majority of Washington’s key global trade partners, meaning disruptions to supply chains – including in minerals essential for the energy transition – are increasingly likely.
The US is mainly or wholly import-reliant for around four-fifths of its identified 50 critical minerals, including from its US-Mexico-Canada Agreement (USMCA) partners Canada and Mexico. If Canada, for example, responds to the imposition of tariffs by the US with new export taxes, bans or restrictions on mineral exports, increasing costs or supply shortages are a prospect that US businesses will have to adapt to.
There is potential for US tariffs to slow the rollout of green policies if nations view renewables mandates or more stringent carbon regulation as adding additional burdens to their economy at a time of increasing trade friction. However, this could be counterbalanced somewhat by investments in low-carbon solutions such as carbon capture, utilisation and storage (CCUS) or hydrogen.
Dr Simi Thambi
Climate economist
FAIRR
An increase in trade protectionism is not good for climate action. Climate scientists have conceptualised this as a scenario of rising retaliatory tariffs – Shared Socioeconomic Pathway 3 (SSP3) – where challenges to mitigation and adaptation are high, making it unlikely for the world to limit temperature rise to 1.5C by the end of the century. This scenario could lead to up to four times more emissions than a sustainability-focused pathway with low challenges to mitigation and adaptation.
Mitigation is very challenging in this scenario because reducing emissions is more expensive, as investments needed to scale clean technologies are not prioritised. As a result, these technologies fail to penetrate well into the markets that need them most cost-effectively. For example, according to the International Energy Agency’s (IEA) 2024 electric vehicle outlook, electric vehicle sales in emerging markets remain very low. Lowering global emissions without greening the transport sector in developing economies would be highly challenging.
Adaptation also faces considerable challenges in SSP3, because one can expect deforestation and cropland expansion to rise in this scenario, as countries focus on their national ambitions. Extensive deforestation would reduce ecosystems and biodiversity, reducing their adaptive capacity.
Robert Rozansky
Global LNG analyst and project manager, Europe gas tracker
Global Energy Monitor
The Trump administration has gone all in on promoting US LNG under its “America first”, “energy dominance” agenda. As it seeks to boost new LNG production projects that are still on the drawing board, such as the Alaska LNG project touted in the State of the Union address, the US could further exacerbate a global overbuild of LNG infrastructure that threatens international climate targets. At the same time, the Trump administration’s trade war may make these same proposed LNG projects more difficult to build and finance.
Tariffs will raise the cost of raw materials, such as steel, the “backbone of LNG facilities”. If tariffs lead to economy-wide inflation, labour could become more expensive, too. The LNG industry is no stranger to the toll of inflation. For example, the cost of the under-construction Golden Pass LNG Terminal rose by $2bn after its main contractor declared bankruptcy in May citing pandemic-related cost inflation and delays.
If it becomes more expensive to build LNG export terminals in the US, financiers committed to projects under construction may struggle to recover their investments and those evaluating proposed facilities may be hesitant to invest.
The longer proposed projects sit without financial backers, the less likely it is they will get off the ground at all. New US LNG terminals are already set to face steep competition from an incoming wave of export projects abroad and increasingly cheap renewable power, as an alternative to gas.
Given that LNG may be roughly as bad for the climate as coal, if not worse, one upside to Trump’s trade war is that it might stymie his efforts to push US LNG expansion into overdrive.
Chris Severson-Baker
Executive director
Pembina Institute
In Canada, this is unfolding into a national debate about how best to strengthen our economic resilience and ensure long-term prosperity in the face of a hostile US.
There is a risk that what president Trump is doing could cause knee-jerk reactions here in Canada. The Canadian oil and gas lobby, for example, has been using this moment to make the case for more oil and gas production and infrastructure, to get more of its products to markets outside the US.
While we agree that Canada needs to diversify its trading partners, doubling down on oil and gas exports would not provide the long-term economic resiliency and energy security our country is seeking right now. We should look instead at Europe, where governments are aggressively decarbonising their economies, not only for climate reasons. They also understand that clean energy and new technologies are associated with less price volatility and more secure supplies, as well as health and affordability benefits for citizens.
The EU’s forthcoming carbon border adjustment mechanism (CBAM) will give an advantage to low-carbon exports of steel, aluminium and cement. These are all industries that Canada is well-placed to lead on, given our abundance of emissions-free electricity to power them. However, this can only happen if we retain our nationwide industrial carbon pricing system.
That is also why the next big nation-building project we foresee in Canada is not oil and gas infrastructure, but widespread electrification, supported by a buildout and modernisation of our electricity grid. This would help Canadians become more resilient, both to the economic impacts of trade disputes and the physical and economic impacts of climate change.
Anne-Sophie Corbeau
Global research scholar at the Center on Global Energy Policy
Columbia University
Trump’s tariffs have already had an impact on LNG trade. After the Trump administration imposed new tariffs on China in early February 2025, China retaliated by announcing, among other things, a 15% tariff on US LNG. China and the US are not too dependent on each other in LNG trade, with US LNG representing only 6% of China’s LNG supply in 2024. But China has not imported a single US LNG cargo since 6 February, as Chinese offtakers of US LNG are diverting their cargoes to other regions to avoid tariffs.
However, China and the US are respectively the largest LNG importer and exporter globally. Chinese buyers have contracted significant amounts of US LNG between 2021 and 2023. Should tariffs persist or even increase, US LNG will likely continue to be diverted to other countries, making the whole global LNG market less efficient. Meanwhile, Chinese buyers may become hesitant to contract more US LNG.
Another country that may be at risk if trade relations deteriorate is Mexico. Mexico’s energy system is very dependent on gas. It is also uniquely dependent on imports of US pipeline gas, which is cheaper than LNG imports. There are also a few Mexican LNG export projects at different stages of advancement that rely on US gas supplies and are therefore in competition with US-based LNG projects. Uncertainties over the bilateral relationship could become a source of risk for Mexico.
Avantika Goswami
Programme manager, climate change
Centre for Science and Environment
Donald Trump’s use of tariffs as an economic weapon is an attempt to regain dominance in the US’ trade relationships, for varying reasons – one being the US’ massive trade deficit.
From a climate perspective, tariffs need to be situated within a larger picture. They are likely to raise costs for general goods in the US – and green goods are not excluded from this calculus. This comes at a time when the US is lagging behind east and south-east Asia in the manufacturing of green technologies and has been slow in its domestic energy transition.
Tariffs may further raise the cost of the transition in the US. In tandem with attempts to expand oil and gas production in the domestic energy mix as Trump promises – and also any successful reindustrialisation efforts – this could see a rise in US domestic emissions. Meanwhile, fossil fuel exports will raise emissions elsewhere.
Tariffs – if imposed widely – may hurt the exports of countries like India, which nurture aspirations to mimic China’s role as an exporter of green goods. There has been an increase in the export of solar technology from India to the US, with India’s share of the country’s module imports rising from 2.5% in 2022 to 10.7% in 2024, amounting to approximately $2bn in 2023-24. For a country with aspirations in green manufacturing, tariffs on green goods could undermine this positive momentum for India.
This shift toward protectionism in the US does not necessarily spell the collapse of the global green goods market. Instead, it may serve to strengthen China’s role in the global green technology supply chain.
Lastly, the return to protectionism, particularly green protectionism, is an act of hypocrisy by nations like the US, which have spent years denouncing the same policies at the World Trade Organization when undertaken by developing countries.
Tu Le
Managing director
Sino Auto Insights
It is important to take the Trump administration’s individual actions in totality, while also keeping in the back of your mind that the US is the second largest passenger vehicle market in the world. That drives the need for legacy automakers to sell into this market.
The tariffs force companies to review their long-term manufacturing strategy. If they have to move multiple factories, that changes, reduces or eliminates what would have likely been more investment in research and development for clean energy vehicles, due to their limited capital.
The Trump administration is also poised to eliminate the more stringent Environmental Protection Agency (EPA) vehicle emissions standards that would have taken effect in 2027. If successful, that would substantially reduce the urgency for global original equipment manufacturers to launch products with more efficient powertrains. And it pushes out the need for oil companies in Russia, the Middle East and the US to alter or reduce their investments in clean energy initiatives.
Legacy manufacturers play a role in this as well, since their leadership years ago seemed to be so bullish in their ability to easily move over to clean energy vehicles. Their initial sales forecasts for this timeframe were never realistic and it put a spotlight on this being a left versus right issue, when it should have been a discussion on energy independence all along.
The US and EU governments are likely to push out their net-zero targets [for vehicles]. They were arbitrary to begin with. Now, with the Trump administration in place and European automakers whining about their inability to meet the more stringent requirements, they seem more than likely to be delayed past 2035.
Ellie Belton
Senior policy advisor – trade and climate
E3G
It is hard to imagine a scenario in which higher tariffs will benefit the global energy transition. Even if clean technologies are not directly targeted, the complex nature of international supply chains means that there will inevitably be knock-on effects, such as through increased costs for component parts like steel and aluminium.
Retaliatory tariffs against the US will also create a domino effect, distorting trade flows worldwide and altering countries’ comparative advantage in the clean economy. The biggest risk to climate action is the uncertainty this creates, which will damage investor confidence and distract governments from driving green ambition.
But a more unpredictable US could create opportunities for the UK and EU to attract low-carbon investment and gain a competitive edge in the energy transition. Continued efforts to provide public support for decarbonisation and seek mutual gains with cooperative trade partners will enable Europe to capitalise on the growing demand for renewable technologies globally.
Trade policy may have become a geopolitical game, but the urgent need to deliver a safe climate remains as critical as ever. The world is currently stuck in crisis response mode, but it is vital that we do not lose sight of the long-term direction of travel.
Eileen Torres Morales
Research associate
Stockholm Environment Institute
The effects of Trump’s tariffs on the global transition to green iron and steelmaking are still uncertain. It will take some time to see the impact, if any, such as increased steel prices in the short term, changed trade dynamics or long-term impacts on global green steel production.
The announcement of steel tariffs has forced exporting countries to rapidly reconsider how to stay competitive in the US market. The tariffs might benefit steel producers in the US, but a likely outcome is that both public and private consumers within the US will face rising steel prices regardless of whether the steel is green or not.
Trump’s administration’s interest in research and development of US-based green iron and steel production also remains unclear. It is not yet known if incentives for steel decarbonisation considered in the IRA will remain. For example, will the negotiations to advance green iron and steel production under the US Department of Energy’s industrial demonstrations programme continue or not?
Although the imposition of tariffs by the US may temporarily shift attention away from international competition and policies focused on heavy industry transition, this should not distract from progress in establishing a market for low-carbon products.
Policy instruments, such as the EU’s emissions trading system (ETS) and CBAM, should continue to be prioritised. Such tools can support the construction of a strong internal market for green steel, thus steering attention away from tariffs, back to driving innovation in low-carbon technology and emissions reductions that contribute to global climate action.
Dr Aurélien Saussay
Assistant professor at the Grantham Research Institute on Climate Change and the Environment
London School of Economics and Political Science
The looming threat of Trump’s tariffs is already reshaping energy policy decisions in concerning ways.
Perhaps most alarming, from a European standpoint, is European Commission president Ursula von der Leyen’s recent suggestion that Europe should increase its imports of US shale gas-derived LNG to appease the Trump administration and avoid tariffs. This move would seriously undermine the EU’s 2050 net-zero commitment.
This potential shift illustrates how trade tensions can indirectly sabotage climate progress. I’m particularly concerned by how these tariffs could undermine the viability of carbon-pricing schemes in major economies. When faced with increased economic pressures from tariffs, countries could be more tempted to relax environmental standards to maintain competitiveness.
The steel and aluminium sectors – already struggling to decarbonise – would be especially vulnerable. Many mills have begun investing in cleaner technologies, but tariffs could force them to prioritise cost-cutting over emissions reduction.
Furthermore, the uncertainty created by trade wars makes low-carbon investments riskier. Clean energy technologies, many of which are capital intensive, require stable policy environments to attract investments. The constant threat of retaliatory tariffs dampens investor confidence.
Perhaps most importantly, retaliatory tariffs on clean-energy technologies could significantly slow the global energy transition. This is particularly the case for tariffs targeting China, which is a leader in many of the key decarbonisation technologies. By increasing costs for solar panels, wind turbines and electric vehicles, these measures would hamper deployment rates precisely when acceleration is needed.
The post Experts: What do Trump’s tariffs mean for global climate action? appeared first on Carbon Brief.
Experts: What do Trump’s tariffs mean for global climate action?
Antarctic sea ice has recorded its third-smallest winter peak extent since satellite records began 48 years ago, new data reveals.
Provisional data from the US National Snow and Ice Data Center (NSIDC) shows that Antarctic sea ice hit its annual winter peak on 14 September, with an extent of 17.59m square kilometres (km2).
The organisation notes that the data is still preliminary, adding that “large fluctuations in extent are typical of Antarctic sea ice near the seasonal maximum”.
One expert tells Carbon Brief that it is “concerning to see these low values persisting”, but says that scientists need more time to determine whether this represents a “structural shift” in Antarctic sea ice extent.
Meanwhile, at the Earth’s other pole, Arctic sea ice reached its annual minimum on 12 September, ranking as the joint-10th lowest in the satellite record.
The NSIDC notes that the last 20 years have seen the lowest 20 Arctic sea ice extents in the satellite record.
Antarctic peak
Dr Lettie Roach, a polar climate scientist at the Alfred Wegener Institute in Germany, tells Carbon Brief that this year’s Antarctic sea ice maximum was “well below average for the season”. She warns that, “after several decades of stable or increasing winter Antarctic sea ice conditions, it is concerning to see these low values persisting”.
She adds:
“Compared with the Arctic, it’s less clear how recent changes in Antarctic sea ice are attributable to human-caused warming vs natural variability. We need more years of observations to better understand whether this is truly a structural shift.”
Dr Clare Eayrs, a postdoctoral researcher at the Korea Polar Research Institute (KOPRI), tells Carbon Brief that, since recording a “near-average February minimum” extent, Antarctic sea ice has “returned to unusually low winter coverage”.
She notes that Antarctic sea ice extent in July and August this year were the fifth and fourth lowest on record, respectively, adding that “all five of the lowest July extents have occurred since 2022 and all four of the lowest August extents since 2023”.
The chart below shows Antarctic sea ice extent in 2025 (dark blue) and 2026 (red) so far. For comparison, the chart shows decadal averages (dotted lines) as well as 2023 (mid blue), the year of the smallest winter sea-ice maximum on record.
Eayrs tells Carbon Brief that the regional pattern of Antarctic sea ice cover “changed substantially during the growth season”.
For example, she says that “in April, the Bellingshausen Sea remained almost entirely ice-free, while the neighbouring Amundsen Sea had more ice than usual”.
However, by late August, changes in atmospheric pressure and wind meant that “the Bellingshausen deficit had largely recovered, while ice was unusually scarce in the Amundsen Sea and across much of East Antarctica”.
Arctic minimum
Meanwhile, the Arctic recorded its minimum summer sea ice extent on 12 September. At 4.60m km2, this year ties with 2025, 2010 and 2008 as the 10th-lowest sea ice extent on record.
The chart below shows Arctic sea ice extent in 2025 (dark blue) and 2026 (red) so far. For comparison, the chart shows decadal averages (dotted lines) as well as 2012 (mid blue), the year of the smallest summer sea-ice minimum on record.
Roach tells Carbon Brief that although this minimum is not “record setting”, it is still “lower than any sea ice minimum before 2007”. She adds:
“Human-caused climate change has reduced Arctic sea ice cover and thickness, so the region is fundamentally different compared to a few decades ago.”
Scientists have been tracking Arctic sea ice thickness using a reanalysis produced called the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) since 1979.
In March 2026, the National Oceanographic and Atmospheric Administration (NOAA) terminated a global dataset of air pressure that scientists relied upon to produce PIOMAS, forcing both datasets to stop publishing updates.
The PIOMAS website says it will take “considerable effort and time” to find alternative data to use in their reanalysis. It adds that “we don’t yet have a good sense if that’s possible with available funds and if so, when we will be able to resume production of a new PIOMAS timeseries”.
Roach also notes that August saw record-breaking heat sweep across much of the world, explaining that high temperatures “extended into Arctic coastal regions, close to regions with substantial sea ice loss – particularly the Barents-Kara and East Siberian seas”.
Dr Zack Labe, a scientist at Climate Central, tells Carbon Brief that the absence of a new record does not mean that ice cover is becoming more “resilient”. He says:
“Local weather patterns across the Arctic play a really important role in year-to-year sea-ice extent, even as the long-term trend is clearly downward.”
Labe tells Carbon Brief that weather in the Arctic this summer was “influenced mainly by lower pressure toward the central Arctic, which brought cloudier and cooler conditions that limited surface melt and delayed the start of the melt season”.
He explains that this “was most obvious across parts of the Beaufort and Chukchi seas, where the melt season didn’t really kick off until after early July, which was more than two weeks later than normal”.
In contrast, he says, the Atlantic side of the Arctic “had a much more extreme summer”, with sea ice in the Barents Sea recording its “earliest melt-out on record”.
This was partly due to “unusually warm air and ocean temperatures”, Labe says. He notes, for example, that parts of western Siberia saw unusually persistent temperatures more than 5C above the 1981-2010 average for much of the summer, which extended out over the Kara Sea and contributed to substantial ice melt in this area”.
Labe tells Carbon Brief that, going forward, scientists need “more data and observations of other sea-ice metrics, like ice thickness, which may give us better insight into the overall condition of the ice pack, especially during years like 2026 when it is very fragmented”.
(In March 2026, Arctic sea ice reached its peak extent for this winter, clocking in as the joint-smallest in a satellite record going back almost half a century.)
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The post ‘Concerning’ low sea ice persists as Antarctic hits third-lowest winter peak appeared first on Carbon Brief.
‘Concerning’ low sea ice persists as Antarctic hits third-lowest winter peak
Participants at COP31 in Antalya will have a “duty” not to interfere in Türkiye’s internal affairs under the country’s hosting deal with the UN, reviving a clause dropped for last year’s climate summit in Brazil that human rights groups warn could put activists at risk.
Türkiye has faced growing criticism from human rights groups over the jailing of opposition figures, journalists and activists and imposed a blanket protest ban around July’s summit of the NATO military alliance in Ankara.
The contested provision is included in the binding agreement between the UN climate secretariat and the Turkish government that sets out responsibilities over logistical arrangements and details participants’ rights and obligations.
The document, signed in June but only made public on Wednesday, gives accredited COP31 attendees immunity from legal action over what they say, write or do in connection with the conference. Climate Home News understands that this safeguard can be applied to what takes place both inside and, in certain circumstances, outside of the UN-controlled COP “Blue Zone”. For the first time, this protection explicitly continues after the summit ends.
But participants enjoying these “privileges and immunities” also have a duty to respect Türkiye’s laws and regulations and not to interfere in its internal affairs, the agreement states. Rights groups fear its wide-ranging formulation could be used to discourage criticism of the host government.
Climate Home News understands that whether an action is covered by the immunity or infringes on the host’s internal affairs would be evaluated on a case-by-case basis, with close coordination between the country’s authorities and the UN climate change body.
A separate provision states that immunity shall be waived where the UN believes it would “impede the course of justice”.
‘Chilling effect’
Those same provisions featured in the host country agreements for COP28 in the United Arab Emirates and COP29 in Azerbaijan, both regarded as authoritarian regimes, before being dropped for COP30 in Brazil.
Ann Harrison, climate justice policy advisor at Amnesty International, said it is “extremely disappointing” that the COP31 agreement re-introduced clauses that could “hinder the ability of human rights defenders and civil society organisations to conduct their work safely”.
COP31 electrification pledge leaves out clean power commitment
She added the provisions could have a “wider chilling effect” on rights to freedom of expression and peaceful assembly, given concerns over the human rights situation in Türkiye, including laws that “have shrunk civic space” and their “abusive” implementation by authorities.
The UN climate change body declined to comment.
Rights groups have documented blanket protest bans, unlawful use of force by the police and prosecutions of journalists, human rights defenders and lawyers across Türkiye in the last year.
Arrests and protest bans
Last July, environmental activist Esra Işık was sentenced to more than two years for “resisting” a public official over what Amnesty International described as a peaceful protest against an urgent expropriation order linked to the expansion of coal mining in south-western Türkiye. She is appealing the conviction.
Ahead of a summit of the NATO alliance in the capital Ankara in July, authorities put in place a 13-day blanket ban on demonstrations, citing “national security”, and arrested over 200 people. Human Rights Watch said the crackdown showed Türkiye’s “ruthless intolerance of freedom of speech and assembly”.
Earlier this month, Turkish police detained dozens of people as part of what rights groups described as the government’s widening crackdown on LGBTQ+ activists and venues.
Questioned by media as to how he would guarantee the right to protest at COP31, Kurum said earlier in September that his team would “try to meet” any request they receive from civil society and give them “a free space to express themselves”.
“Don’t worry, thinking you will not be able to voice your opinions or really share your thoughts,” he said in an attempt to reassure campaigners, adding that he had put former deputy environment minister Mehmet Birpinar in charge of liaising with civil society.
Civic space needed
Camilla Pollera, human rights and climate change campaigner at the Center for International Environmental Law (CIEL), said meaningful participation at COP31 is fundamental to the legitimacy of climate action.
“At a climate summit, civil society participation necessarily includes being present, speaking out, scrutinising governments’ decisions and climate policies, and advocating for communities most vulnerable to climate change,” she added.
At last year’s COP30 summit, thousands of Indigenous people and climate activists peacefully marched through the Amazonian city of Belém in the first major demonstration outside the UN venue in four years. Smaller-scale demonstrations were largely confined to the “Blue Zone” at COP27 in Egypt, COP28 in the UAE and COP29 in Azerbaijan.
In two other separate incidents in Belém, members of the Munduruku tribe blocked access to the conference centre for hours, demanding an end to development projects in their ancestral land, and protesters stormed through the venue clashing with UN security officials.
The COP31 hosting agreement keeps some of the safeguards previously hailed by civil society groups. The government and the UN secretariat commit to upholding “the fundamental human rights” of all participants in the agreement’s preamble.
Under the deal, Türkiye also needs to ensure that security personnel follow “the highest ethical and professional standards and are expected to behave with integrity and respect”.
The post COP31 attendees told not to interfere in Türkiye’s “internal affairs” appeared first on Climate Home News.
COP31 attendees told not to interfere in Türkiye’s “internal affairs”
As rising seas submerge growing swathes of land, countries that lose territory should still keep their national boundaries, sovereign rights and UN membership, according to a political declaration adopted at the UN General Assembly in New York on Thursday.
The declaration, which was championed by climate-vulnerable small island states, affirms “the presumption in favour of continued statehood” in the face of sea level rise fuelled by climate change, and urges countries to work together to assist communities affected by encroaching oceans.
Speaking at a high-level UN meeting to address the existential threats posed by sea level rise, Cabo Verde’s Prime Minister Francisco Carvalho, one of the initiative’s co-facilitators along with Australia, said the adoption of the text by consensus sends “a message of hope”.
“This declaration has a very special meaning. For us, sea level rise is neither a distant threat nor a theoretical concern,” he said, adding that rising seas put at risk key infrastructure, water resources and economic growth in small island states.
In the Pacific, sea levels have risen at twice the global rate, dramatically increasing coastal flooding events from two to 20 a year in the Republic of the Marshall Islands, and from zero to 102 events per year in American Samoa, according to the World Meteorological Organization (WMO).
Surangel Whipps Jr., president of the Pacific island of Palau, said the summit in New York represents a “moment of international solidarity”, and highlighted that small island states will remain permanent members of the UN.
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Declaration recognises statehood
An advisory opinion by the world’s top maritime court, the International Tribunal on the Law of the Sea (ITLOS), first upheld in 2024 that countries do not have to shrink their maritime borders even if they lose land territory due to sea level rise. This was reiterated by the International Court of Justice in last year’s landmark ruling on the climate obligations of states.
The new declaration endorsed by all governments at the UN General Assembly stresses that sea level rise “is not a distant scenario but a real and lived experience for many”, and notes that international law must be implemented in global responses to rising seas.
UN Secretary-General António Guterres said the “milestone must now be translated into action”, adding that the declaration should encourage an “ongoing dialogue” at the “highest possible level” leading to practical outcomes. Pacific islands have proposed an international treaty on sea level rise that would provide more legal certainty.
“Those on the frontlines must be front and centre on every decision. We cannot allow countries and cultures to vanish beneath the waves,” he said. “The SOS has gone out. The world must answer.”
At regional summit, Pacific islands ask for COP31 support for clean energy and finance
Goodwin Friday, prime minister of St. Vincent and the Grenadines, said measures to protect vulnerable states will require adequate finance. “Investing in resilience now is more cost-effective than paying the far greater price for loss and damage later,” he added.
Championed by Australia’s COP31 co-presidency, Pacific islands have sought to put adaptation to sea level rise and ocean conservation at the top of the political agenda by inviting world leaders to attend the pre-COP31 summit co-hosted by Fiji and Tuvalu in October.
Tuvalu will also host the second global fossil fuel phase-out summit in April 2027, after around 60 governments met this year in Santa Marta, Colombia, to discuss ending their dependence on coal, oil and gas.
“Our coastlines, our reefs and our communities are living with the consequences of fossil fuel dependence every day, and our people have earned the right to help shape the way forward,” Lynda Tabuya, Fiji’s climate minister, said in a statement announcing details of the conference.
Ocean monitoring gets a boost in New York
Amid record-breaking marine heat and seas rising at unprecedented speed, governments in New York announced new commitments to protect the world’s ocean, as efforts to bolster marine ecosystems and coastal communities rise up the political agenda.
On Wednesday, the EU and Canada announced more funding for a new Europe-led ocean monitoring system called OceanEye, launched in the aftermath of a failed attempt by the Trump administration to dismantle the largest existing network of deep-sea observatories.
During an event at UN headquarters in New York, EU President Ursula von der Leyen and Canadian Prime Minister Mark Carney announced around $163 million in new funding for the initiative, with the EU pledging €92 million ($105m) on top of existing seed funding and Canada pledging C$82 million (US$58m) over five years.
According to an EU statement, while OceanEye will collaborate with the Global Ocean Observing System, that network “remains vulnerable to financial shortfalls and geopolitical disruptions”. A group of 30 countries from Europe, Africa and the Americas joined an international initiative in support of OceanEye, including large coastal nations like Brazil, Namibia and Mexico.
Von der Leyen said OceanEye “can make us the leading ocean data provider in a matter of years”, including by launching new satellites and installing new observatories in the deep ocean. “From outer space to the deepest ocean, our funding helps us keep watch beneath the waves,” she added.
Carney said the initiative would help protect Canada’s Arctic region with real-time monitoring operating year-round. “We can’t protect what we can’t see,” he said, also highlighting that Canada had expanded conservation of its ocean territory from 1% a decade ago to 15% now.
In New York, a group of 19 countries said they are either developing or implementing plans to sustainably manage all of their ocean territory, with 12 new nations joining the initiative. In a joint communiqué, they called on more countries to sign up ahead of COP31.
Warnings of El Niño-fuelled extreme heat
Scientists and world leaders have raised the alarm over this year’s record-breaking marine temperatures, which have persisted above historical peaks for more than 100 days as the naturally occurring El Niño phenomenon intensifies in the Pacific.
Extreme ocean heat could become a threat to coastal ecosystems and communities, experts fear. Water temperatures 1.5C above normal levels have also rapidly fuelled a strong hurricane in the Pacific in recent days.
Despite scientific calls for additional ocean conservation efforts, a report launched this week in New York warned that efforts to protect ocean ecosystems are lagging behind, with only 10% of the global ocean covered by conservation areas and just 3.5% designated as “effectively protected”.
The post Threatened by rising seas, small islands secure right to keep their statehood appeared first on Climate Home News.
Threatened by rising seas, small islands secure right to keep their statehood
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