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Global warming linked to the world’s biggest oil and gas companies made all “major” 21st century heatwaves more intense and frequent.

This is according to new research, published in Nature, which uses “extreme event attribution” to assess the impact of climate change on all 21st-century heatwaves that were classified as “major disasters”.

The authors find one-quarter of the 213 heatwaves would have been “virtually impossible” without human-caused global warming.

They add that the effect of climate change on heatwave frequency and intensity is becoming more pronounced as the planet warms.

The study estimates the emissions stemming from the operations and production of more than 100 “carbon majors”, such as ExxonMobil, BP, Saudi Aramco and Shell.

The fossil fuels produced by these companies account for 60% of all human-caused CO2 emissions over 1850-2023, the study says.

The authors find that heatwaves recorded over 2000-23 were made, on average, 1.7C hotter due to climate change, with half of this increase due to the emissions originating from carbon majors.

This study “could be used to support future climate lawsuits and aid diplomatic negotiation”, according to a scientist not involved in the research.

Worsening heatwaves

As the planet warms, heatwaves are becoming more intense and frequent, driving economic losses, ecosystem damage and a rise in heath-related deaths.

The EM-DAT database catalogues all “major disasters” that have been reported since the year 1900 – defined as events that cause at least 10 fatalities, affect at least 100 people, or result in the declaration of state of emergency or a call for international assistance.

Between 2000 and 2023, the database lists more than 200 heatwaves. These are shown on the map below, where darker pink indicates a greater number of heatwaves. Countries with no reported heatwaves are shown in grey.

Global map showing that more than 200 'major' heatwaves have been recorded around the world in the 21st century
The map below shows the number of heatwaves per country recorded over 2000-23 on the EM-DAT database. Data: Quilcaille et al (2025).

The study authors acknowledge that heatwave reporting is “highly uneven”, with only nine of the heatwaves reported in the database since the year 2000 in Africa, Latin America or the Caribbean. (This is largely because extreme heat events in these regions are not routinely monitored.)

They then carried an attribution analysis on each heatwave to identify whether it was made more likely or intense due to human-caused climate change.

The chart below shows how climate changes increased the intensity and frequency of the 78 heatwaves assessed over 2000-09 (left), 54 heatwaves assessed over 2010-19 (middle) and 81 heatwaves assessed over 2020-23 (right).

The authors find that climate change increased the intensity and probability of all 213 heatwaves in the study. They add that the influence of climate change on heatwaves is strengthening over time.

In each panel, the bars show the percentage of heatwaves in that time period that were made 0.25-1.0C (yellow), 1.0-2.0C (orange) or 2.0-3.0C (red) hotter due to climate change.

The position of bars indicate the change in likelihood of the heatwaves. This ranges from those made 1-10 times more likely due to climate change (left-most bar in each panel) to those made more than 11,000 times more likely (right-most bar in each panel).

Bar chart showing change in heat intensity
The extent to which climate changes increased the intensity and frequency of the 78 heatwaves assessed over 2000-09 (left), 54 heatwaves assessed over 2010-19 (middle) and 81 heatwaves assessed over 2020-23 (right). These are shown by colours and bar heights respectively. Source: Quilcaille et al (2025).

Heatwaves recorded over 2000-09 were, on average, 20 times more likely due to climate change, according to the authors. Meanwhile, those recorded over 2010-19 were about 200 times more likely.

Similarly, 2000-09 heatwaves were 1.4C hotter due to human-caused climate change on average, according to the study, while 2010-19 heatwaves were made 1.7C hotter.

The study finds that human-caused climate change made 55 heatwaves at least 10,000 times more likely. According to the authors, this is “equivalent to saying that they would have been virtually impossible” without the influence of human activity.

Carbon majors

To assess the contribution to heatwaves by oil and gas companies’ products, the authors use a database of carbon dioxide and methane emissions from 180 carbon majors over 1854-2023. This includes direct emissions from the companies, as well as the emissions released when the oil and gas they produced is used by others.

The 180 carbon majors in the database represent 60% of all human-caused CO2 emissions, including land use, over 1850-2023, according to the study. The paper adds that 14 companies, including ExxonMobil, BP, Saudi Aramco and Shell, are responsible for almost half of these emissions.

Using the Earth system model OSCAR, the authors estimate that global average surface temperatures increased by 1.3C between the 1850-1900 average and the year 2023.

They find that 0.7C of this increase was linked to the carbon majors, with 0.3C due to the emissions of the 14 largest.

The chart below, taken from an accompanying Nature “news and views” article, shows the contribution of oil and gas companies’ products to increasing global average surface temperatures over 1950-2023, compared to the 1850-1900 average.

Each colour indicates a carbon major, while grey indicates other sources of temperature increase, such as land-use change.

The contribution of oil and gas companies to increasing global average surface temperatures over 1950-2023, compared to the 1850-1900 average. Each colour indicates a company, while grey indicates other sources of temperature increase. Source: Haustein (2025).
The contribution of oil and gas companies to increasing global average surface temperatures over 1950-2023, compared to the 1850-1900 average. Each colour indicates a company, while grey indicates other sources of temperature increase. Source: Haustein (2025).

Heatwaves recorded over 2000-23 were, on average, 1.7C hotter due to climate change, according to the study. The authors find that emissions originating from carbon majors and their products contributed about half of the increase in intensity of heatwaves seen since pre-industrial times.

The authors then break down the contribution of emissions from each carbon major on each heatwave in their analysis.

For example, they find that the emissions linked to Saudi Aramco made 51 heatwaves at least 10,000 times more likely. They add that on average, emissions tied to the company made the 213 heatwaves 0.04C hotter.

Legal action

Attribution studies already play an important role in courts by providing evidence that helps judges to determine liability.

Dr Rupert Stuart-Smith is a research associate in climate science and the law at the University of Oxford’s Sustainable Law Programme. He was not involved in the study, but has published separate work showing that the emissions linked to each of the six largest corporate emitters cause one heat-related death in Zurich alone, every summer.

Stuart-Smith tells Carbon Brief that the new paper is a “high-quality analysis and a meaningful step forward for the field of climate change attribution”. He adds:

“With more and more lawsuits aiming to hold high-emitting companies responsible for their contributions to climate change impacts or compel state and corporate actors to reduce their emissions and prevent rising climate harms, work like this provides the basis for well-informed judicial decision-making.”

Dr Yann Quilcaille is a researcher at ETH Zürich and lead author of the study. He stresses the importance of attribution research for court cases, telling Carbon Brief that he hopes his work “can be used by legal practitioners”.

However, he also says that his role as a scientist is not to assign “responsibility” for climate change, but to “provide information to governments for decision making and to courts for litigation”.

Earlier this year, Dr Christopher Callahan, the principal investigator of the IU Climate & Society Lab, published a study with Prof Justin Makin, an associate professor in the department of geography at the University of Dartmouth, which links trillions of dollars in economic losses to the extreme heat caused by emissions tied to oil and gas companies.

Mankin tells Carbon Brief that the new paper is “very closely” linked to his research.

Callahan says the new paper is “an important contribution to an emerging literature that illustrates how individual emitters can be linked to the change risk of extreme climate conditions and human impacts”.

He explains that “this kind of evidence will be important in courtrooms – holding emitters legally accountable requires demonstrating a causal nexus between that emitter and a particularised harm suffered by a plaintiff”.

Attribution

The cutting-edge field of extreme weather attribution seeks to establish the role that human-caused warming played in these events. Attribution studies have been carried out on hundreds of heatwaves all around the world, as shown in Carbon Brief’s interactive map.

The new paper uses one of the earliest and most commonly used methods of attribution, called “probabilistic attribution”.

Specifically, it uses the method set out by the World Weather Attribution initiative for its “rapid attribution” analyses.

The authors first chose a temperature “threshold” to define their heatwave.

They then used a global climate model to simulate two worlds – one mirroring the world as it was during the heatwave and the other using the climate of 1850-1900. This second scenario is used to represent the climate in a world without human-caused climate change.

The authors run their models thousands of times in each scenario. As the world’s climate is inherently chaotic, each model “run” – individual simulations of how the climate progresses over many years – produces a slightly different progression of temperatures. This means that some runs simulate the heatwave, while others do not.

The authors count how many times the threshold temperature was in each model run. They then compared the likelihood of crossing the threshold temperature in the world with – and a world without – climate change.

For example, they find that the 2021 Pacific north-west heatwave was made 3.1C hotter due to human caused climate change and more than 10,000 times more likely.

(A study by the WWA at the time of the heatwave found that the heatwave was made 150 times more likely. The discrepancy is due to differences in the definition of the event, as well as its “very unlikely nature” according to the study authors.)

Dr Frederieke Otto is a professor at Imperial College London and founder of the WWA initiative. She tells Carbon Brief that the new study is “very similar to some other recent studies on impacts, based on the hazard attribution method used by WWA”, but says that “this is the most high profile and wide-reaching one”.

Otto adds:

“I do hope that many more impact attribution studies will follow, based on our or other extreme event attribution studies. We need more research on this.”

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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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