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The European Commission has put forward new plans to cut emissions under the EU carbon market more slowly, from 2031 onwards.

On 17 July, the commission presented its long-awaited proposal for reform of the EU’s Emissions Trading System (ETS).

It recommended a number of changes, including giving companies free allowances to cover their emissions for longer than previously planned, conditional on climate investment plans.

The proposal offers a more business-friendly and “savvy” approach, argued EU climate commissioner Wopke Hoekstra in a press conference.

But critics believe it could “weaken” the system and put EU climate targets at risk.

Alongside the proposal, the commission also announced a new target for electricity to make up 46% of energy consumption by 2040, doubling the current rate of 23%.

This could cut EU spending on imported fossil fuels by €260bn annually, according to the commission.

In this Q&A, Carbon Brief outlines the details of the new ETS proposal – which is subject to negotiation with member states – and explores what it could mean for climate action.

What is the EU Emissions Trading System?

The EU ETS is a carbon market, which puts a price on the greenhouse gas emissions of companies in power generation, industry, aviation and other sectors.

It covers everything from electricity generation to steel production, as well as flights within the EU and a handful of other European countries.

Emissions in these sectors have halved since the ETS launched in 2005, according to the European Commission.

A European parliament briefing describes the system as a “cornerstone” of EU climate policy, covering around 40% of the bloc’s overall emissions.

It applies to emissions in all 27 EU countries alongside Iceland, Liechtenstein, Norway and electricity generation in Northern Ireland. (The UK established its own ETS after Brexit.)

The ETS operates as a “cap and trade” system, which puts a limit on the amount of carbon dioxide equivalent (CO2e) that can be emitted within the sectors it covers.

The “cap” on emissions gradually decreases each year until, eventually, they are expected to reach zero.

The currency of trade within the system is “allowances”. One allowance is equal to one tonne of CO2-equivalent emissions.

At present, around 57% of these allowances are bought by companies in auctions. The EU generated around €43bn in revenue from these auctions in 2025.

The remaining 43% of allowances are given to companies for free, to cover some or all of their emissions.

This is intended to prevent “carbon leakage” – the idea that companies operating in countries with strict climate policies will relocate to countries with looser rules.

The amount of free allowances varies by sector, depending on factors including the level of competition with overseas firms that do not face a carbon price.

What did companies and countries want from the ETS review?

Countries and companies have been divided on how they wanted the ETS to evolve.

Some pushed for more ambition to help meet European climate goals. Others called for it to be rolled back, amid rising costs for businesses.

In March, 10 countries including Italy, Hungary and Poland wrote a letter to the commission calling the ETS an “existential risk” for key industrial sectors, reported Euronews.

Italy had earlier even called for the system to be suspended outright.

France and other countries favoured introducing a slower descent towards bringing the emissions cap to zero by 2039.

Some steel and chemical companies also criticised the cost burden of the ETS.

Other organisations focused on calls for stability and predictability in the system.

In recent weeks, Spain, the Netherlands and five other countries called on the commission to “resist gutting” the ETS in its review, said E&E News. They said the ETS should be strengthened to “ensure long-term investment predictability and regulatory stability”.

Weakening the system could “undermine investment signals and leave Europe more exposed to fossil-fuel shocks”, said a March 2026 briefing from climate thinktank E3G.

Another E3G briefing said the “risk” is that politicians weaken the system as a short-term economic fix, “undermining one of the EU’s main tools for delivering on its industrial transformation ambitions”.

Dozens of investment organisations called on EU countries to facilitate a “robust and predictable” ETS. They said that “policy stability is the cheapest investment stimulus available to the EU”.

In its list of priorities for ETS reform, the NGO Carbon Market Watch said that “now is not the time to backslide” on its aims and terms.

What is in the new proposal from the European Commission?

The commission’s proposal outlines a number of changes to the ETS, to bring it in line with the EU’s climate goal to cut emissions to 90% below 1990 levels by 2040.

The review will “bring relief to industry”, the commission says, while also continuing the ETS’ “essential” role in climate action.

However, others are more sceptical about the impacts it could have on climate action.

Below, Carbon Brief details the main aspects of the proposal.

Free allowances extended

The European Commission proposes to extend free allowances beyond a previously agreed date.

Free allocations were due to reduce from this year and be fully removed by 2034.

However, the commission has proposed to extend this to 2038, on the condition that companies receiving free allowances set out how they will invest in decarbonising their EU operations.

It proposes that from 2031 onwards, 80% of free allowances in the system would be given to companies that have submitted plans for investment in EU decarbonisation.

The remaining 20% of free allowances would only be allocated to those that can prove they followed through with planned investments and achieved the emissions reductions they had previously outlined.

This move is a “step in the right direction”, says Dr Kirsten Scholl, the director for EU affairs at thinktank Epico, but it must not “impose excessive administrative burdens”.

The EU’s carbon border adjustment mechanism (CBAM) was designed to replace the existing system of free allowances in the ETS.

It is a tax applied to certain imported goods, based on the amount of CO2 emissions released during their production. It began to be phased in at the start of 2026.

As a result, free allocation is being gradually phased out from 2026-38.

However, the commission has proposed that 15% of free allocations due to be removed because of CBAM should be reintroduced from 2028, to “reduce the speed at which CBAM is phased-in and mitigate the remaining carbon leakage risk”.

The commission says that preventing carbon leakage “remains a crucial element” of the ETS.

Pushing back the phase-out of free allowances and the full implementation of CBAM “risks squandering the EU’s credibility with investors and trading partners alike”, says Francesco Lombardi Stocchetti, a policy advisor on sustainable economy at the Bellona Foundation, an environmental NGO.

“Europe cannot lead the clean industrial transition just by moving the goalposts,” he adds in a statement.

Slowing path to reach zero emissions by a decade

The commission has proposed to cut emissions in the ETS more slowly from 2031 onwards.

This could mean new allowances are able to enter the scheme into the 2040s, instead of ending in 2039 as previously planned.

But the planned changes are still “aligned” with the EU’s 2040 climate target and net-zero requirement by 2050, says the commission.

The overall ETS cap on emissions was reduced by 1.7% each year up to 2020 and then by 2.2% annually since 2021.

It is then agreed to drop by 4.3% over 2024-27 and 4.4% from 2028 onwards.

Maintaining similar rates after 2030 would not be “realistic”, says the commission’s proposal.

Instead, it suggests that the cap should fall by 3.7% per year over 2031-35 and by just 1.7% annually over 2036-40.

Simon Evans on Bluesku: The cap on EUETS emissions was due to hit zero by 2039

This will make the path to zero emissions within the ETS “more gradual and aligned with domestic climate ambition level”, claims the commission.

But WWF says that the proposal would allow an extra 2bn tonnes of CO2e to be emitted. (See: What could the changes mean for greenhouse gas emissions?)

Aviation

The commission has proposed plans to incorporate more airline emissions into the ETS.

The plan outlines that, from 2029, all flights departing from the European Economic Area (EU, Iceland, Liechtenstein and Norway) and landing in other countries within 5,000km of a point in central Europe should be added to the ETS.

This distance means that the changes would not apply to flights landing in China or the US. (Both the US and China have opposed the expansion of ETS coverage for flights.)

The commission also proposes including emissions from private jets and other “business flights” in the ETS.

It notes that aviation currently accounts for 14% of EU transport emissions. This is expected to skyrocket to around 90% by 2050, given it is more difficult to decarbonise than other modes of transport.

Some aviation emissions have been included in the ETS since 2012. This included emissions from air travel within the EEA and flights departing from Switzerland and the UK.

The airline industry did not respond favourably to reports of plans to expand beyond this scope.

On 8 June, the biggest airlines in Europe urged commission president Ursula von der Leyen not to extend the ETS to cover international flights, saying that it would raise ticket prices.

A study commissioned by Carbon Market Watch found that the ETS encompassing all flights departing from the EEA, not just those within it, would result in a “very small impact on ticket prices and passenger demand”.

Auction money

Under the proposed changes, EU countries would need to funnel half of the money they receive from ETS auctions towards decarbonising sectors covered by the system.

This would amount to more than €100bn in investment for decarbonisation before 2030, says the commission.

Around three-quarters of the money generated by the ETS has been allocated to EU countries since 2013, the proposal notes.

Since 2023, countries have been required to spend all of this money on climate and energy-related activities – at least on paper.

But the proposal says the “transparency and effectiveness” of this mechanism has been “insufficient”.

Currently, only around 5% of the ETS money “directly supports industrial decarbonisation in sectors such as steel, chemicals and fertilisers”, it adds.

Going forward, the proposal says that 50% should be put towards actions aiding clean-energy plans, industrial decarbonisation and improved waste management, as some examples.

A briefing by thinktank Institut Montaigne noted that the money generated within the system for EU countries to help finance the energy transition should be “at the heart” of ETS discussions, amid budget constraints in many EU countries at the moment.

CO2 removals

The commission has proposed integrating permanent carbon removals into the ETS to “give additional flexibility” for certain sectors that struggle to decarbonise. This action was previously agreed within the terms of the EU’s 2040 climate target.

“Permanent” removals refer to direct air capture with carbon storage and similar measures, rather than temporary removals such as planting trees.

The removals would be integrated into the system by increasing the allowance cap by an amount equivalent to the number of removals purchased.

This will set up “additional emission space” for hard-to-abate sectors and also support the “scale-up of the carbon removals industry”, outlines the proposal.

It also proposes that certain companies, such as shipping and aircraft operators, could compensate for their emissions with their own certified carbon removals.

These emissions would not be permitted to “go beyond zero”, adds the proposal.

Sven Harmeling, the head of climate at Climate Action Network (CAN) Europe, says that adding carbon removals “would weaken the ETS impact, undermine the carbon price and create new loopholes for polluters instead of accelerating the transition away from fossil fuels”.

The proposal “fails to ensure that only high-integrity removal technologies would be considered”, he adds in a statement.

However, the director of the Potsdam Institute for Climate Impact Research, Prof Ottmar Edenhofer, describes the move as “an important step”, saying:

“For the first time, it creates a credible and long-term investment framework for carbon-removal technologies in Europe.”

International credits

The commission proposes that firms covered by the ETS could make use of “high-integrity” credits bought on the global carbon market from 2036 onwards.

This relates to the EU’s 2040 climate target, in which up to 5% of the 90% reduction in GHGs can come from global carbon credits.

Amélie Laurent, a policy advisor in carbon accounting at the Bellona Foundation, says in a statement that these credits “should be in a strategic last resort reserve, not an excuse to avoid doing our homework”.

Aurora D’Aprile, the EU policy director at the International Emissions Trading Association, notes in a statement:

“For international credits, early preparation on governance and procurement and greater certainty around a pilot from 2031, will be essential to establish a credible demand signal.”

Other sectors extended

The commission has outlined plans to expand the inclusion of the maritime sector in the ETS.

Maritime accounts for around 4% of the EU’s total emissions. The new proposals for the sector include adding certain small ships of 400-5,000 tonnes to the system.

The proposal also outlines plans to incorporate more waste incineration into the ETS on a gradual basis from 2031.

Since 2024, some waste-burning companies have been required to monitor and report their emissions under the ETS. But they did not have to purchase credits.

Now, the commission proposes introducing the sector on a gradual basis.

Under the proposals, companies would require allowances for 25% of their emissions in 2031, 50% in 2032, 75% in 2033 and 100% from 2034 onwards.

Market stability reserve review

The market stability reserve was added to the ETS in 2019 to help stabilise the flow of allowances.

It acts like an overflow container holding extra allowances. If the number of allowances in the market falls below a certain threshold, more are brought out from the reserve to balance things out.

Equally, if the market is flooded with too many allowances, depressing prices, then some are removed and put into the reserve.

The commission has proposed a reform of the reserve, including changing the upper and lower limits for when allowances are released or removed.

It wants to reduce the rate at which allowances are withdrawn from auctions when they exceed a certain threshold from 24% to 12% from 2028.

This means that the permits would be able to stay in the market for longer.

As shown in the chart below, the price of carbon in the EU increased tenfold over 2017-2021, exceeding €80 (£68) per tonne of CO2.

Carbon price in the EU ETS over 2012-26, in € per tonne of CO2. Credit: Carbon Brief, based on data from Energy Instrat and EEX
Carbon price in the EU ETS over 2012-26, in € per tonne of CO2. Credit: Carbon Brief, based on data from Energy Instrat and EEX

Nevertheless, the commission proposal says the reserve was “effective in mitigating price shocks” on the ETS caused by the Covid-19 pandemic and the surge in energy prices after Russia invaded Ukraine in 2021.

UK-EU ties

The EU and UK have agreed in principle to link their carbon markets, but the commission’s proposal says negotiations are still “under progress”.

It adds that the commission “foresees” future financial contributions from the UK to the EU’s ETS, if a final agreement is reached.

Many companies have called for the systems to be linked. In June, dozens of carbon-capture organisations and industry groups signed a letter calling for greater certainty on EU-UK links to ensure cross-border carbon-capture and storage projects are covered, for example.

Switzerland’s ETS has been linked to the EU since 2020.

What could the changes mean for greenhouse gas emissions?

The European Commission says the ETS plays a “crucial role” in meeting its climate targets “cost-effectively”.

The system contributed to a 41% reduction in EU industrial emissions over 2021-23, a decrease of around 800m tonnes of CO2 per year, according to recent analysis from the London School of Economics.

As highlighted in the chart below, the EU’s overall GHG emissions have dropped by 40% since 1990.

Greenhouse gas emissions in the EU over 1990-2025 (solid line) and projections out to 2050 (dotted line). The red dots indicate climate targets for 2020, 2030, 2040 and 2050. Credit: Carbon Brief, based on data from the European Environment Agency
Greenhouse gas emissions in the EU over 1990-2025 (solid line) and projections out to 2050 (dotted line). The red dots indicate climate targets for 2020, 2030, 2040 and 2050. Credit: Carbon Brief, based on data from the European Environment Agency

Climate commissioner Hoekstra told a press briefing that the proposal is “fully aligned” with the EU’s target to cut GHGs to 90% below 1990 levels by 2040. He called the plan “completely climate-law proof”.

He also noted that no other EU policy has contributed to reducing emissions on the scale of the ETS, describing it as a “phenomenal asset”.

But campaigners and experts are concerned that the proposed changes could slow decarbonisation and put the EU’s climate goals at risk.

Carbon Market Watch says the plans would “severely weaken” the ETS and “risk undermining the achievement of the EU’s 2040 and 2050 climate targets”.

The proposals “would represent a major setback for EU climate ambition, weakening incentives to cut emissions, extending reliance on fossil fuels and putting the 2040 climate target at risk”, says a statement from WWF.

WWF estimates that 2bn extra tonnes of CO2 would be emitted if the proposals were approved in the EU.

Michael Bloss, a German member of the European parliament (MEP) for the European Greens, says the plans would release around 1.4bn tonnes of extra CO2. He describes the proposal as “climate vandalism”.

Chiara Martinelli, the director of CAN Europe, says:

“Every extra tonne of CO2 allowed under the ETS makes Europe’s climate challenge harder and more expensive. Weakening the ETS now is a gift to polluters that have prioritised shareholder payouts instead of investing in cleaner production.”

How was the proposal received?

The European Commission’s new ETS proposal has been met with a mixed response.

Scholl from Epico says the proposal has “important flexibilities that can help address competitiveness challenges and provide greater certainty for industrial investment”. But she adds in a statement:

“Concerns remain about whether the proposed changes preserve the long-term investment signal of the ETS and sufficiently recognise companies that have already committed to ambitious decarbonisation pathways.”

Edenhofer from the Potsdam Institute for Climate Impact Research adds that the proposals provide “clarity on the contribution that emissions trading is intended to make towards the 2040 climate target”.

Elisa Giannelli, a programme lead at E3G, says in a statement:

“Today’s proposal might please some, but it risks increasing both the long-term cost and the time needed to deliver the EU’s growth strategy.”

Pepe Escrig, a senior researcher, also at E3G, adds that the commission held onto some of the ETS’ “essential foundation”, but “yielded to political pressure to weaken it as a quick fix to broader challenges”.

This has left the plan “pull[ing] in two directions: strengthening support for industrial investment while weakening parts of the framework meant to drive it”, says Escrig.

Andrea Spignoli, the policy manager of sustainable markets at Bellona Europa, says the proposal risks “weakening green investments” and putting a larger decarbonisation burden onto other sectors that are not covered by the ETS.

Greg Van Elsen, a senior industrial policy coordinator at CAN Europe, says in a statement:

“Free pollution permits were never meant to become a permanent subsidy. Extending them until 2038 rewards delay instead of industrial decarbonisation.”

Lobby groups also had mixed reactions to different aspects of the proposal.

The International Air Transport Association says it is “deeply frustrated” with the proposal.

The organisation’s director general, Willie Walsh, claims the consequences will be “harmful”, “sowing acrimony over extraterritoriality, slowing global decarbonisation and sapping European competitiveness”.

WindEurope says the proposal risks “slowing decarbonisation and failing to channel billions in ETS revenues to industrial electrification”.

BusinessEurope’s director general, Markus J Beyrer, says some aspects “raise concerns”. For example, he says the “new conditionalities for free allocations risk increasing bureaucratic complexity and the uncertain role for international carbon credits”.

What is ‘ETS2’?

ETS2 is a separate emissions trading system to the main ETS. It is due to take effect in 2028 and is not affected by the current ETS review or resultant proposals.

It will operate under a similar system as the existing ETS, covering emissions from transport, buildings and smaller industries in other sectors.

One key difference, however, is that ETS2 will not provide any allowances for free. They will all be auctioned and bought by companies.

On 15 July, 10 countries, including Italy and Poland, had urged the commission to also reconsider the ETS2 during this review. They were unsuccessful.

Similar to the original ETS, the commission believes the carbon price under the new ETS2 system will “provide a market incentive for investments in building renovations and low-emissions mobility”.

However, in June, member-state governments and the European parliament agreed on a number of “safeguards” to support price stability.

For example, if allowance costs under the ETS2 exceed €45 per tonne of CO2, they agreed that 40m allowances will be put into the system from a reserve to normalise the supply – double the amount previously agreed.

A European Environment Agency briefing said the ETS2 will “affect fuel prices and mobility costs” and that money will be syphoned into a social climate fund to “support vulnerable households and investments”.

What happens next?

EU countries will now negotiate over the terms of the commission’s proposal before it goes to a vote in the European parliament.

Ireland, which recently took over the six-monthly rotating presidency of the Council of the EU, has stated that it wants the ETS proposals to be signed off by the end of this year.

A previous document from the council, which represents member-state governments, outlined a target to agree a deal by the first quarter of 2027.

Clean Energy Wire says that this would be an “unusually ambitious timetable for one of the bloc’s most technically complex pieces of climate legislation”. 

Politico notes that “months of arguing” is likely to occur.

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‘Concerning’ low sea ice persists as Antarctic hits third-lowest winter peak

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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.

Antarctic sea ice peak in 2026 is third smallest on record. Daily Antarctic sea ice extent for 2026, 2025, and 2023, as well as decadal averages, million km2. Source: NSIDC. Line chart showing 2026 peak in September remaining below 1980s-2010s averages but above Sep 2023's lowest record. - (alt text generated by Google Gemini)
Daily Arctic sea ice extent for 2026 and 2025, with decadal averages for comparison, based on data from the NSIDC. Chart by Carbon Brief.

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”.

Map showing the main regions of the Antarctic.
Map showing the main regions of the Antarctic. Credit: Carbon Brief

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.

Arctic sea ice minimum in 2026 is tied for 10th smallest on record. Daily Arctic sea ice extent for 2026, 2025 and 2012, as well as decadal averages, million km2. Source: NSIDC. The line graph shows annual ice extent reaching September lows, with 2026 far below 1980s-2000s averages. - (alt text generated by Google Gemini)
Daily Antarctic sea ice extent for 2026 and 2025, with decadal averages for comparison, based on data from the NSIDC. Chart by Carbon Brief.

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”.

Map showing main regions of the Arctic.
Map showing main regions of the Arctic. Credit: Carbon Brief

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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COP31 attendees told not to interfere in Türkiye’s “internal affairs”

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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.

Turkish riot police arrested protesters during the anti NATO protest on July 7, 2026 in Ankara, Turkey. (Photo by Sedat Suna/Getty Images)

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.

Thousands march in a COP30 protest calling for climate justice and protection of the Amazon among other things in Belem, Brazil on November 15, 2025.
Thousands march in a COP30 protest calling for climate justice and protection of the Amazon among other things in Belem, Brazil on November 15, 2025. (Photo: Mariel Lozada/Climate Home News)

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”.

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Threatened by rising seas, small islands secure right to keep their statehood

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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.

    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.

    Secretary-General António Guterres attending the meeting on addressing the existential threats posed by sea level rise at UN headquarters in New York.
    Secretary-General António Guterres attending the meeting on addressing the existential threats posed by sea level rise. (Photo: UN Photo/Manuel Elías)

    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”.

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