Delegates at the 61st meeting of the Intergovernmental Panel on Climate Change (IPCC) in Sofia, Bulgaria have failed to agree on a timeline for the upcoming seventh assessment report.
The week-long meeting saw more than 230 delegates from 195 member governments revisit an unresolved topic from the previous meeting in January – finalising the timeline for the IPCC’s seventh assessment report (AR7) cycle.
AR7 will be the IPCC’s latest round of reports summarising the most recently published climate science.
First published in 1990, the assessment reports typically take 6-7 years to complete. AR6’s concluding “summary for policymakers” was published in March last year.
Many countries said in Sofia that they favoured an accelerated timeline, in which all three “working group” reports would be completed by June 2028. This deadline would allow the findings to inform the UN’s second global stocktake, which will gauge progress towards the Paris Agreement goals.
Ahead of last week’s meeting, a group of 40 IPCC authors from developing countries published an open letter arguing that the AR7 reports “can and must” be produced by this date in order to remain policy-relevant.
However, countries including Kenya, India, China and South Africa opposed the accelerated timeline, warning that “haste leads to shoddy work” and saying that raising concerns that the decision was being rushed through.
Ultimately, the decision was delayed. The issue will be picked up again after the AR7 scoping meeting in December.
Delegates in Sofia had more success in agreeing outlines for the special report on “climate change and cities” and the methodology report on “short-lived climate forcers”, both of which will be published in 2027.
Tricky talks in Turkey
Following the completion of its sixth assessment report (AR6) last year, the IPCC’s attention has now turned to its seventh assessment (AR7).
In a four-day meeting in Istanbul in January, which focused on the IPCC’s “programme of work” for AR7, governments decided against adopting a new structure and instead committed to the traditional set of three “working group” reports and a final synthesis report.
Before the Istanbul meeting, governments had already agreed that the AR7 cycle would include a special report on climate change and cities, as well as a methodology report on short-lived climate forcers.
The meeting then saw the addition of a second methodology report on carbon dioxide removal technologies, carbon capture utilisation and storage, plus a revision to the IPCC’s 1994 technical guidelines on impacts and adaptation.
However, while there was agreement between government delegates on the selection of reports, a timeline for their delivery was not agreed.
The majority of countries meeting in Istanbul favoured delivering the working group reports on an “accelerated” timeline, which would see them published by the end of 2028. This would allow the reports to “inform” the UN’s second global stocktake (GST), which will gauge progress towards the Paris Agreement goals.
However, a few countries, including Saudi Arabia, India and China, “strenuously objected” to this timetable, reported the Earth Negotiations Bulletin (ENB), which has unique access to the closed talks.
It reported, for example, that Saudi Arabia “opposed the shorter timeline, saying this would lead to compromised working groups reports both in content and inclusivity”. While China “emphasised that AR7 aims to be inclusive and developing country scientists should be given time to make their contributions”.
As opposition to the accelerated timeline “held fast” – despite the meeting overrunning into a fifth day – no decision was made.
The final “decisions adopted” document instead requested that the IPCC bureau – experts with more managerial roles, including vice and co-chairs – prepare a document “outlining the month and year of delivery on the basis of an AR7 strategic plan, taking into account the different views expressed” in the meeting.
The instruction included an “oblique reference” to taking “into account” the GST, noted ENB. The report, it was decided, would be presented at the Sofia meeting “for consideration and decision”.
Decision delayed
A key goal of the meeting in Sofia last week was to nail down a timeline for AR7. Ahead of the meeting, a group of 40 IPCC authors from developing countries sent a letter arguing that the AR7 reports “can and must” be produced by 2028, in time to inform the second GST report.
On 31 July, former IPCC vice chair Dr Youba Sokona – a co-author of the letter – published a commentary in Climate Home News summarising its main arguments. He argued that “ensuring the IPCC cycle aligns with GST timelines is crucial for maintaining the integrity of international climate cooperation”, adding that, without input from the IPCC, the stocktake “may lack essential southern perspective”.
He also dismissed concerns that accelerating the timeline would compromise the robustness of the reports, or lead to under-representation of developing countries. The article also outlined ways these concerns could be addressed while implementing an accelerated timeline.
Dr Frederieke Otto – a senior lecturer in climate science at the Grantham Institute for Climate Change and the Environment and IPCC AR6 author – tells Carbon Brief that, in her view, the Working Group II (WG2) and III (WG3) reports are “really needed before the GST”.
Typically, the three working group reports focus on “the physical science basis”, “impacts, adaptation and vulnerability” and “mitigation of climate change”.
On the morning of 31 July, Dr Jim Skea – the IPCC chair for AR7 – presented a proposed schedule for AR7. The proposal was requested by the IPCC panel at the 60th session in Istanbul in January. It was developed by the co-chairs of the IPCC working groups and the Task Force on National Greenhouse Gas Inventories (TFI), then reviewed by the IPCC bureau.
Under this schedule, the AR7 cycle would last six-and-a-half years – similar to the fifth and sixth assessment cycles.
In the discussion that followed, a long list of countries supported the schedule as proposed, with many underscoring the importance of feeding into the second GST, according to the ENB’s summary of the entire meeting.
Belize, supported by the US, the Netherlands and the UK, said IPCC reports need to be ready for the Bonn Climate Change Conference in June 2028, according to the ENB. Belize added that “an inclusive cycle is only meaningful if it can feed into the GST”.
Saint Kitts and Nevis argued that the absence of “crucial” IPCC input into the GST would mean the IPCC would lose policy relevance. The country also argued that the schedule for AR7 is “neither compressed nor rushed”, because, while it is shorter than the schedule for AR6, it also contains fewer special reports.
The AR6 cycle included three special reports – on 1.5C of global warming in 2018, then, successively in 2019, on climate change and land, and the ocean and cryosphere.
(Discussions about linking IPCC reports with the GST are long-standing. During 2016-18, the IPCC panel “agreed to draft terms of reference for a task group on the organisation of future work of the IPCC in light of the GST under the Paris Agreement”, according to the ENB.)
Finland argued that “if we want science-based policymaking, the faster we have the next report, the faster policymakers are able to take science-based policy action”, according to the ENB. And many small-island developing nations also “underscored the critical importance of timely reports from small island developing states [SIDS] and less-developed countries”.
Several countries, including Brazil, Peru and the UK, “stressed that inclusivity concerns could be addressed in ways other than an extended timeline”.
However, several countries, including India, Algeria, Kenya, the Russian Federation and South Africa, argued that a longer timeline is needed to ensure “robust, rigorous scientific outputs, and to ensure greater inclusivity”.
India called the proposed schedule “unprecedented,” saying that the fourth and fifth assessment cycles had similar timeframes, but did not include special reports. It also argued that “producing the best science needs time, haste leads to shoddy work and retracted publications”, according to the ENB.
Kenya, supported by India and South Africa, warned that there are “major” gaps in literature on adaptation in Africa. It said that the “short time” between AR7 scoping meetings and the first author meetings may not be sufficient to identify and fill “literature gaps” for the continent.
And South Africa and Saudi Arabia opposed expediting the schedule to feed into the stocktake, suggesting this would not make the IPCC more “policy-relevant,” but more “policy-prescriptive.”
Dr David Lapola is a research scientist at the University of Campinas in Brazil and AR6 contributing author. He tells Carbon Brief that, “while inclusiveness is super important to bring more legitimacy to the process, it also slows down decisions when you have to have the agreement of all members”. He says that it is a “great challenge to imprint more agility to the IPCC decision processes without compromising inclusiveness”.
On the evening of 1 August, Skea “noted how difficult it had been to find a solution that satisfied all delegations” and he proposed to postpone a decision on the timeline until after the AR7 scoping meeting in December 2024.
In a press release published after the meeting closed, the IPCC stated that “at its next plenary in early 2025, the panel will agree on their respective scope, outlines and work plans, including schedules and budgets”.
“While some expressed disappointment about the lack of consensus, others were quick to point out that determining the timeline after the scoping meeting for the working groups is consistent with past practice and the IPCC’s principles and procedures”, says the ENB.
Dr Hannah Hughes is a senior lecturer in international politics and climate change at Aberystwyth University, who has written extensively about the IPCC. She tells Carbon Brief that it is “not surprising” that the decision has been further postponed. She explains that the IPCC is “balancing complex and competing dynamics”.
She adds:
“Delaying the finalisation of the timeline until after the scoping of reports offers the advantage of having a clear sense of the advances in science and the level of urgency in communicating these.”
However, Otto tells Carbon Brief that it will be “difficult to scope without a timeline”. She says that “with the decision postponed, it seems that conflicts could not be resolved, but everything is just postponed”.
What additional reports were discussed in Sofia?
Earlier this year, IPCC held scoping meetings (in Latvia and Australia, respectively) for a special report on climate change and cities and a methodology report on short-lived climate forcers – both of which are due for publication in 2027. The proposals suggested at these meetings were discussed in Sofia.
Special report on climate change and cities
In 2016, the IPCC decided to produce a special report on climate change and cities. A “cities and climate change science conference” was held in Canada in 2018 to “inspire the next frontier of research focused on the science of cities and climate change”. A scoping meeting was held in Latvia over 16-19 April 2024 to develop a proposed outline for the report.
On 27 July in Sofia, Diana Ürge-Vorsatz – IPCC vice-chair and chair of the scientific steering committee (SSC) for the cities report – presented the proposal.
Under the proposal, the report will have five main chapters. The first will provide framing for the report, the second will discuss “trends, challenges and opportunities” in a changing climate and the third will be called “actions and solutions to reduce urban risks and emissions”. The final two chapters will focus on facilitating change and solutions.
Ürge-Vorsatz also suggested a timeline in which authors for the report will be selected by the end of 2024 and the first meetings of lead authors will be held in 2025. The expert review of the first order draft will take place by the end of 2025, and 15-19 March 2027 will see the “approval of the summary for policymakers and acceptance of the special report”.
In Sofia, many countries proposed changes or raised queries, according to ENB. For example, countries including India, South Africa and Malawi questioned how cities are defined. Burundi, Kenya and Mauritius said early warning systems should be given more prominence. And countries including Burundi, Malaysia and Kenya called for a more “balanced consideration of adaptation and mitigation”.
Over the following days, there were multiple more rounds of comments and drafts. For example, India questioned the shift from “loss and damage” to “losses and damages” implemented in one of the drafts, noting IPCC precedents for use of the latter terminology are limited to one document.
Saudi Arabia opposed the use of “net-zero goals” for cities, saying that these are country-level objectives. And Kenya, supported by India and Algeria, “called for improvements in the way adaptation was addressed throughout the outline”, including the removal of a reference to “maladaptation”.
By 31 July, most countries had accepted the proposal. But others – including Saudi Arabia, India and Kenya – were continuing to raise concerns and to call for a chapter-by-chapter discussion of the report outline.
Skea said the situation was “at a crossroads, given the difficulty of opening only a few non-consensual issues without risking an unravelling, and [he] invited the SSC to confer on whether the issues expressed could be somehow incorporated without unacceptable implications”, according to the ENB.
Timor-Leste, supported by the US and the Netherlands, urged countries to reach a compromise in time for the end of the meeting, noting their delegation consists of a single person. But India, Saudi Arabia and Kenya “expressed concern with other delegations’ ‘refusal to engage’ with their concerns”.
A “huddle” was set up to address some of the key concerns and, on 2 August, the delegates approved a draft decision.
Dr Aromar Revi is the founding director of the Indian Institute for Human Settlements and author on multiple IPCC reports. He tells Carbon Brief that the approval of the outline for an IPCC special report on cities is “a historic step that brings the urban and infrastructure transition, up front and centre of the climate action solutions space”.
He adds:
“It has taken almost a decade of preparation by a wide range of urban and climate actors to make this possible, since it was first suggested in 2016 as a special report in the AR6 cycle…
“This report will be especially important to cities and urban areas in Asia, Africa and Latin America and the SIDS, where 90% of the incremental urban population will live over the next 30-odd years, often in informal settlements with poor services and high vulnerability.”
Revi adds that the proposed timescale, which would see the work completed by March 2027, sets a “high bar” for the authorship team.
Prof Lisa Schipper – a professor of development geography at the University of Bonn and IPCC AR6 author – tells Carbon Brief that the cities report “will be a critical meeting point of adaptation, mitigation and development agendas”.
She adds:
“I was happy to see the level of detail in the cities [report] outline. Normally, the IPCC report outlines are a shopping list of topics without any normative framing. This makes it challenging to write the report with a consistent narrative. I think IPCC member countries will find more relatable and usable content in the cities report.”
The report “will be arriving at a crucial time”, adds Dr Zachary Labe – a scientist at the NOAA Geophysical Fluid Dynamics Laboratory, noting that many cities are “leading examples of how to design and implement evidence-based climate action through adaptation and mitigation practices”.
“The calls for nominations of authors are scheduled for release as early as next week,” according to the IPCC press release.
Short-lived climate forcers methodology report
In 2019, the IPCC decided that the TFI should produce a methodology report on short-lived climate forcers (SLCFs) – gases and particulates, such as methane and carbon, that cause global warming, but typically only stay in the atmosphere for less than two decades.
At the 60th session in January 2024, the panel decided to produce the report by 2027. A scoping meeting for the report was held on 26-28 February 2024 in Brisbane, Australia.
On the first day of the 61st session, Dr Takeshi Enoki, the co-chair of the TFI, presented an overview of the group’s recommendations. He suggested a title for the report of “2027 supplement to the 2006 IPCC guidelines for national greenhouse gas inventories: short-lived climate forcers (2027 supplement on SLCFs)”, and said the report would be a supplement to the 2006 guidelines.
They added that the report would be made up of an overview chapter and five “volumes” following the format of the 2006 IPCC guidelines. These five volumes will focus on “general guidance”, the energy sector, industrial processes and product use, the agriculture, forestry and other land use sector, and waste, he said.
However, many countries raised concerns. First, there was disagreement about whether or not to include hydrogen and PM2.5 – particulate matter with a diameter of under 2.5 micrometres – in the report.
China, India, Iraq and Saudi Arabia, among others, argued that they should not be included, as the literature supporting their inclusion is not robust enough, the ENB says. However, it adds that many other countries – including the US, Canada and Chile – supported its inclusion.
Second, the title of the report was called into question. India said that linking the report to the 2006 guidelines “creates a whole new set of obligations and commitments through other channels”. It, along with Saudi Arabia, called for the report to be changed back to a standalone document. However, Denmark, Germany, Spain and Morocco expressed support for the current format.
A series of huddles were held to iron out these disagreements. On 2 August, the delegates agreed to change the name of the report to “2027 IPCC methodology report on inventories for short-lived climate forcers”.
However, in the absence of consensus on the case for including PM2.5 and hydrogen, the panel decided to come back to this discussion in the future.
What else was agreed in Sofia?
Updates on a range of other IPCC activities were also given, including the IPCC scholarship programme, terms of reference for the IPCC publication committee, and progress reports aimed at increasing accountability and transparency in the IPCC process.
Expert meetings
Ahead of the meeting in Sofia, the IPCC had already decided to limit the production of new special reports in line with the reported preferences of IPCC chair Jim Skea, who previously promised that he would strongly resist pressure to produce more reports.
The limited number of special reports was, in part, to allow more time for expert meetings or workshops. On 2 August, working group one co-chair Prof Xiaoye Zhang introduced the options for expert meetings and workshops for AR7, “highlighting the need for cross-working group collaboration”, according to the ENB.
He noted that expert meetings on reconciling land-use emissions and on CO2 removal technologies had been held in July 2024. Another meeting on gender, diversity and inclusivity has already been “tentatively” scheduled for later this year, and a workshop on the IPCC inventory software will be held in late August 2024.
Ahead of the meeting in Sofia, IPCC co-chairs and their working group bureaus had also proposed a range of extra meetings for 2025-26.
IPCC co-chair for working group one – Dr Robert Vautard – outlined the proposal for a meeting on high impacts and tipping points. The proposal suggests that 60 experts meet in April 2025 to “prepare consensus for the working group-specific assessments addressing
this important topic subject to intense research and debates in the community”.
Vautard explained that the meeting would be led by WG1, but include contributions from all working groups. He added that the meeting will receive financial support from the World Climate Research Programme.
Many countries supported this meeting, with Ukraine calling tipping points “the elephant in the room”. However, India opposed the meeting, saying it spans too many topics. And Saudi Arabia said the meeting is not needed as tipping points will be discussed in the WG1 report.
A meeting on “adaptation guidelines, metrics and indicators” was also proposed. Several countries, including Kenya and Saudi Arabia, said adaptation should be a priority in this cycle, according to the ENB
Finally, a meeting on “novel approaches to assessing knowledge on climate change and society’s responses” was suggested. Australia, Chile, France and others expressed support of this meeting, with many highlighting the importance of Indigenous knowledge and collaboration with the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services.
Health, overshoot and science communication were also identified among other key areas of interest for AR7.
Improving inclusivity
“The one issue on which all delegates seemed to agree was the need to enhance the inclusivity of the IPCC’s work in both its process and products,” the ENB says.
WG3 co-chair Prof Joy Pereira stressed that the bureau is committed to AR7 products being inclusive in terms of author representation and literature assessment, and pointed to a document on improving inclusivity in AR7.
The document suggests setting the agenda for the expert meeting on gender, diversity and inclusivity – which is planned in late 2024 or early 2025 – and providing training on inclusive practices for lead authors and contributing lead authors during the first lead author meeting.
Efforts will also be taken to sponsor measures such as internet access and access to literature for IPCC scientists, according to the document.
(Carbon Brief’s analysis on the change in diversity of IPCC authors over the past three decades highlights access to literature as a key barrier for IPCC authors from less wealthy institutions.)
The post IPCC meeting in Sofia fails to agree timeline for seventh assessment report appeared first on Carbon Brief.
IPCC meeting in Sofia fails to agree timeline for seventh assessment report
Greenhouse Gases
Cropped 25 February 2026: Food inflation strikes | El Niño looms | Biodiversity talks stagnate
We handpick and explain the most important stories at the intersection of climate, land, food and nature over the past fortnight.
This is an online version of Carbon Brief’s fortnightly Cropped email newsletter.
Subscribe for free here.
Key developments
Food inflation on the rise
DELUGE STRIKES FOOD: Extreme rainfall and flooding across the Mediterranean and north Africa has “battered the winter growing regions that feed Europe…threatening food price rises”, reported the Financial Times. Western France has “endured more than 36 days of continuous rain”, while farmers’ associations in Spain’s Andalusia estimate that “20% of all production has been lost”, it added. Policy expert David Barmes told the paper that the “latest storms were part of a wider pattern of climate shocks feeding into food price inflation”.
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NO BEEF: The UK’s beef farmers, meanwhile, “face a double blow” from climate change as “relentless rain forces them to keep cows indoors”, while last summer’s drought hit hay supplies, said another Financial Times article. At the same time, indoor growers in south England described a 60% increase in electricity standing charges as a “ticking timebomb” that could “force them to raise their prices or stop production, which will further fuel food price inflation”, wrote the Guardian.
‘TINDERBOX’ AND TARIFFS: A study, covered by the Guardian, warned that major extreme weather and other “shocks” could “spark social unrest and even food riots in the UK”. Experts cited “chronic” vulnerabilities, including climate change, low incomes, poor farming policy and “fragile” supply chains that have made the UK’s food system a “tinderbox”. A New York Times explainer noted that while trade could once guard against food supply shocks, barriers such as tariffs and export controls – which are being “increasingly” used by politicians – “can shut off that safety valve”.
El Niño looms
NEW ENSO INDEX: Researchers have developed a new index for calculating El Niño, the large-scale climate pattern that influences global weather and causes “billions in damages by bringing floods to some regions and drought to others”, reported CNN. It added that climate change is making it more difficult for scientists to observe El Niño patterns by warming up the entire ocean. The outlet said that with the new metric, “scientists can now see it earlier and our long-range weather forecasts will be improved for it.”
WARMING WARNING: Meanwhile, the US Climate Prediction Center announced that there is a 60% chance of the current La Niña conditions shifting towards a neutral state over the next few months, with an El Niño likely to follow in late spring, according to Reuters. The Vibes, a Malaysian news outlet, quoted a climate scientist saying: “If the El Niño does materialise, it could possibly push 2026 or 2027 as the warmest year on record, replacing 2024.”
CROP IMPACTS: Reuters noted that neutral conditions lead to “more stable weather and potentially better crop yields”. However, the newswire added, an El Niño state would mean “worsening drought conditions and issues for the next growing season” to Australia. El Niño also “typically brings a poor south-west monsoon to India, including droughts”, reported the Hindu’s Business Line. A 2024 guest post for Carbon Brief explained that El Niño is linked to crop failure in south-eastern Africa and south-east Asia.
News and views
- DAM-AG-ES: Several South Korean farmers filed a lawsuit against the country’s state-owned utility company, “seek[ing] financial compensation for climate-related agricultural damages”, reported United Press International. Meanwhile, a national climate change assessment for the Philippines found that the country “lost up to $219bn in agricultural damages from typhoons, floods and droughts” over 2000-10, according to Eco-Business.
- SCORCHED GRASS: South Africa’s Western Cape province is experiencing “one of the worst droughts in living memory”, which is “scorching grass and killing livestock”, said Reuters. The newswire wrote: “In 2015, a drought almost dried up the taps in the city; farmers say this one has been even more brutal than a decade ago.”
- NOUVELLE VEG: New guidelines published under France’s national food, nutrition and climate strategy “urged” citizens to “limit” their meat consumption, reported Euronews. The delayed strategy comes a month after the US government “upended decades of recommendations by touting consumption of red meat and full-fat dairy”, it noted.
- COURTING DISASTER: India’s top green court accepted the findings of a committee that “found no flaws” in greenlighting the Great Nicobar project that “will lead to the felling of a million trees” and translocating corals, reported Mongabay. The court found “no good ground to interfere”, despite “threats to a globally unique biodiversity hotspot” and Indigenous tribes at risk of displacement by the project, wrote Frontline.
- FISH FALLING: A new study found that fish biomass is “falling by 7.2% from as little as 0.1C of warming per decade”, noted the Guardian. While experts also pointed to the role of overfishing in marine life loss, marine ecologist and study lead author Dr Shahar Chaikin told the outlet: “Our research proves exactly what that biological cost [of warming] looks like underwater.”
- TOO HOT FOR COFFEE: According to new analysis by Climate Central, countries where coffee beans are grown “are becoming too hot to cultivate them”, reported the Guardian. The world’s top five coffee-growing countries faced “57 additional days of coffee-harming heat” annually because of climate change, it added.
Spotlight
Nature talks inch forward
This week, Carbon Brief covers the latest round of negotiations under the UN Convention on Biological Diversity (CBD), which occurred in Rome over 16-19 February.
The penultimate set of biodiversity negotiations before October’s Conference of the Parties ended in Rome last week, leaving plenty of unfinished business.
The CBD’s subsidiary body on implementation (SBI) met in the Italian capital for four days to discuss a range of issues, including biodiversity finance and reviewing progress towards the nature targets agreed under the Kunming-Montreal Global Biodiversity Framework (GBF).
However, many of the major sticking points – particularly around finance – will have to wait until later this summer, leaving some observers worried about the capacity for delegates to get through a packed agenda at COP17.
The SBI, along with the subsidiary body on scientific, technical and technological advice (SBSTTA) will both meet in Nairobi, Kenya, later this summer for a final round of talks before COP17 kicks off in Yerevan, Armenia, on 19 October.
Money talks
Finance for nature has long been a sticking point at negotiations under the CBD.
Discussions on a new fund for biodiversity derailed biodiversity talks in Cali, Colombia, in autumn 2024, requiring resumed talks a few months later.
Despite this, finance was barely on the agenda at the SBI meetings in Rome. Delegates discussed three studies on the relationship between debt sustainability and implementation of nature plans, but the more substantive talks are set to take place at the next SBI meeting in Nairobi.
Several parties “highlighted concerns with the imbalance of work” on finance between these SBI talks and the next ones, reported Earth Negotiations Bulletin (ENB).
Lim Li Ching, senior researcher at Third World Network, noted that tensions around finance permeated every aspect of the talks. She told Carbon Brief:
“If you’re talking about the gender plan of action – if there’s little or no financial resources provided to actually put it into practice and implement it, then it’s [just] paper, right? Same with the reporting requirements and obligations.”
Monitoring and reporting
Closely linked to the issue of finance is the obligations of parties to report on their progress towards the goals and targets of the GBF.
Parties do so through the submission of national reports.
Several parties at the talks pointed to a lack of timely funding for driving delays in their reporting, according to ENB.
A note released by the CBD Secretariat in December said that no parties had submitted their national reports yet; by the time of the SBI meetings, only the EU had. It further noted that just 58 parties had submitted their national biodiversity plans, which were initially meant to be published by COP16, in October 2024.
Linda Krueger, director of biodiversity and infrastructure policy at the environmental not-for-profit Nature Conservancy, told Carbon Brief that despite the sparse submissions, parties are “very focused on the national report preparation”. She added:
“Everybody wants to be able to show that we’re on the path and that there still is a pathway to getting to 2030 that’s positive and largely in the right direction.”
Watch, read, listen
NET LOSS: Nigeria’s marine life is being “threatened” by “ghost gear” – nets and other fishing equipment discarded in the ocean – said Dialogue Earth.
COMEBACK CAUSALITY: A Vox long-read looked at whether Costa Rica’s “payments for ecosystem services” programme helped the country turn a corner on deforestation.
HOMEGROWN GOALS: A Straits Times podcast discussed whether import-dependent Singapore can afford to shelve its goal to produce 30% of its food locally by 2030.
‘RUSTING’ RIVERS: The Financial Times took a closer look at a “strange new force blighting the [Arctic] landscape”: rivers turning rust-orange due to global warming.
New science
- Lakes in the Congo Basin’s peatlands are releasing carbon that is thousands of years old | Nature Geoscience
- Natural non-forest ecosystems – such as grasslands and marshlands – were converted for agriculture at four times the rate of land with tree cover between 2005 and 2020 | Proceedings of the National Academy of Sciences
- Around one-quarter of global tree-cover loss over 2001-22 was driven by cropland expansion, pastures and forest plantations for commodity production | Nature Food
In the diary
- 2-6 March: UN Food and Agriculture Organization regional conference for Latin America and Caribbean | Brasília
- 5 March: Nepal general elections
- 9-20 March: First part of the thirty-first session of the International Seabed Authority (ISA) | Kingston, Jamaica
Cropped is researched and written by Dr Giuliana Viglione, Aruna Chandrasekhar, Daisy Dunne, Orla Dwyer and Yanine Quiroz.
Please send tips and feedback to cropped@carbonbrief.org
The post Cropped 25 February 2026: Food inflation strikes | El Niño looms | Biodiversity talks stagnate appeared first on Carbon Brief.
Cropped 25 February 2026: Food inflation strikes | El Niño looms | Biodiversity talks stagnate
Rising temperatures across France since the mid-1970s is putting Tour de France competitors at “high risk”, according to new research.
The study, published in Scientific Reports, uses 50 years of climate data to calculate the potential heat stress that athletes have been exposed to across a dozen different locations during the world-famous cycling race.
The researchers find that both the severity and frequency of high-heat-stress events have increased across France over recent decades.
But, despite record-setting heatwaves in France, the heat-stress threshold for safe competition has rarely been breached in any particular city on the day the Tour passed through.
(This threshold was set out by cycling’s international governing body in 2024.)
However, the researchers add it is “only a question of time” until this occurs as average temperatures in France continue to rise.
The lead author of the study tells Carbon Brief that, while the race organisers have been fortunate to avoid major heat stress on race days so far, it will be “harder and harder to be lucky” as extreme heat becomes more common.
‘Iconic’
The Tour de France is one of the world’s most storied cycling races and the oldest of Europe’s three major multi-week cycling competitions, or Grand Tours.
Riders cover around 3,500 kilometres (km) of distance and gain up to nearly 55km of altitude over 21 stages, with only two or three rest days throughout the gruelling race.
The researchers selected the Tour de France because it is the “iconic bike race. It is the bike race of bike races,” says Dr Ivana Cvijanovic, a climate scientist at the French National Research Institute for Sustainable Development, who led the new work.
Heat has become a growing problem for the competition in recent years.
In 2022, Alexis Vuillermoz, a French competitor, collapsed at the finish line of the Tour’s ninth stage, leaving in an ambulance and subsequently pulling out of the race entirely.
Two years later, British cyclist Sir Mark Cavendish vomited on his bike during the first stage of the race after struggling with the 36C heat.
The Tour also makes a good case study because it is almost entirely held during the month of July and, while the route itself changes, there are many cities and stages that are repeated from year to year, Cvijanovic adds.
‘Have to be lucky’
The study focuses on the 50-year span between 1974 and 2023.
The researchers select six locations across the country that have commonly hosted the Tour, from the mountain pass of Col du Tourmalet, in the French Pyrenees, to the city of Paris – where the race finishes, along the Champs-Élysées.
These sites represent a broad range of climatic zones: Alpe d’ Huez, Bourdeaux, Col du Tourmalet, Nîmes, Paris and Toulouse.
For each location, they use meteorological reanalysis data from ERA5 and radiant temperature data from ERA5-HEAT to calculate the “wet-bulb globe temperature” (WBGT) for multiple times of day across the month of July each year.
WBGT is a heat-stress index that takes into account temperature, humidity, wind speed and direct sunlight.
Although there is “no exact scientific consensus” on the best heat-stress index to use, WBGT is “one of the rare indicators that has been originally developed based on the actual human response to heat”, Cvijanovic explains.
It is also the one that the International Cycling Union (UCI) – the world governing body for sport cycling – uses to assess risk. A WBGT of 28C or higher is classified as “high risk” by the group.
WBGT is the “gold standard” for assessing heat stress, says Dr Jessica Murfree, director of the ACCESS Research Laboratory and assistant professor at the University of North Carolina at Chapel Hill.
Murfree, who was not involved in the new study, adds that the researchers are “doing the right things by conducting their science in alignment with the business practices that are already happening”.
The researchers find that across the 50-year time period, WBGT has been increasing across the entire country – albeit, at different rates. In the north-west of the country, WBGT has increased at an average rate of 0.1C per decade, while in the southern and eastern parts of the country, it has increased by more than 0.5C per decade.
The maps below show the maximum July WBGT for each decade of the analysis (rows) and for hourly increments of the late afternoon (columns). Lower temperatures are shown in lighter greens and yellows, while higher temperatures are shown in darker reds and purples.
Six Tour de France locations analysed in the study are shown as triangles on the maps (clockwise from top): Paris, Alpe d’ Huez, Nîmes, Toulouse, Col du Tourmalet and Bordeaux.
The maps show that the maximum WBGT temperature in the afternoon has surpassed 28C over almost the entire country in the last decade. The notable exceptions to this are the mountainous regions of the Alps and the Pyrenees.
The researchers also find that most of the country has crossed the 28C WBGT threshold – which they describe as “dangerous heat levels” – on at least one July day over the past decade. However, by looking at the WBGT on the day the Tour passed through any of these six locations, they find that the threshold has rarely been breached during the race itself.
For example, the research notes that, since 1974, Paris has seen a WBGT of 28C five times at 3pm in July – but that these events have “so far” not coincided with the cycling race.
The study states that it is “fortunate” that the Tour has so far avoided the worst of the heat-stress.
Cvijanovic says the organisers and competitors have been “lucky” to date. She adds:
“It has worked really well for them so far. But as the frequency of these [extreme heat] events is increasing, it will be harder and harder to be lucky.”
Dr Madeleine Orr, an assistant professor of sport ecology at the University of Toronto who was not involved in the study, tells Carbon Brief that the paper was “really well done”, noting that its “methods are good [and its] approach was sound”. She adds:
“[The Tour has] had athletes complain about [the heat]. They’ve had athletes collapse – and still those aren’t the worst conditions. I think that that says a lot about what we consider safe. They’ve still been lucky to not see what unsafe looks like, despite [the heat] having already had impacts.”
Heat safety protocols
In 2024, the UCI set out its first-ever high temperature protocol – a set of guidelines for race organisers to assess athletes’ risk of heat stress.
The assessment places the potential risk into one of five categories based on the WBGT, ranging from very low to high risk.
The protocol then sets out suggested actions to take in the event of extreme heat, ranging from having athletes complete their warm-ups using ice vests and cold towels to increasing the number of support vehicles providing water and ice.
If the WBGT climbs above the 28C mark, the protocol suggests that organisers modify the start time of the stage, adapt the course to remove particularly hazardous sections – or even cancel the race entirely.
However, Orr notes that many other parts of the race, such as spectator comfort and equipment functioning, may have lower temperatures thresholds that are not accounted for in the protocol, but should also be considered.
Murfree points out that the study’s findings – and the heat protocol itself – are “really focused on adaptation, rather than mitigation”. While this is “to be expected”, she tells Carbon Brief:
“Moving to earlier start times or adjusting the route specifically to avoid these locations that score higher in heat stress doesn’t stop the heat stress. These aren’t climate preventative measures. That, I think, would be a much more difficult conversation to have in the research because of the Tour de France’s intimate relationship with fossil-fuel companies.”
The post Dangerous heat for Tour de France riders only a ‘question of time’ appeared first on Carbon Brief.
Dangerous heat for Tour de France riders only a ‘question of time’
Greenhouse Gases
DeBriefed 20 February 2026: EU’s ‘3C’ warning | Endangerment repeal’s impact on US emissions | ‘Tree invasion’ fuelled South America’s fires
Welcome to Carbon Brief’s DeBriefed.
An essential guide to the week’s key developments relating to climate change.
This week
Preparing for 3C
NEW ALERT: The EU’s climate advisory board urged countries to prepare for 3C of global warming, reported the Guardian. The outlet quoted Maarten van Aalst, a member of the advisory board, saying that adapting to this future is a “daunting task, but, at the same time, quite a doable task”. The board recommended the creation of “climate risk assessments and investments in protective measures”.
‘INSUFFICIENT’ ACTION: EFE Verde added that the advisory board said that the EU’s adaptation efforts were so far “insufficient, fragmented and reactive” and “belated”. Climate impacts are expected to weaken the bloc’s productivity, put pressure on public budgets and increase security risks, it added.
UNDERWATER: Meanwhile, France faced “unprecedented” flooding this week, reported Le Monde. The flooding has inundated houses, streets and fields and forced the evacuation of around 2,000 people, according to the outlet. The Guardian quoted Monique Barbut, minister for the ecological transition, saying: “People who follow climate issues have been warning us for a long time that events like this will happen more often…In fact, tomorrow has arrived.”
IEA ‘erases’ climate
MISSING PRIORITY: The US has “succeeded” in removing climate change from the main priorities of the International Energy Agency (IEA) during a “tense ministerial meeting” in Paris, reported Politico. It noted that climate change is not listed among the agency’s priorities in the “chair’s summary” released at the end of the two-day summit.
US INTERVENTION: Bloomberg said the meeting marked the first time in nine years the IEA failed to release a communique setting out a unified position on issues – opting instead for the chair’s summary. This came after US energy secretary Chris Wright gave the organisation a one-year deadline to “scrap its support of goals to reduce energy emissions to net-zero” – or risk losing the US as a member, according to Reuters.
Around the world
- ISLAND OBJECTION: The US is pressuring Vanuatu to withdraw a draft resolution supporting an International Court of Justice ruling on climate change, according to Al Jazeera.
- GREENLAND HEAT: The Associated Press reported that Greenland’s capital Nuuk had its hottest January since records began 109 years ago.
- CHINA PRIORITIES: China’s Energy Administration set out its five energy priorities for 2026-2030, including developing a renewable energy plan, said International Energy Net.
- AMAZON REPRIEVE: Deforestation in the Brazilian Amazon has continued to fall into early 2026, extending a downward trend, according to the latest satellite data covered by Mongabay.
- GEZANI DESTRUCTION: Reuters reported the aftermath of the Gezani cyclone, which ripped through Madagascar last week, leaving 59 dead and more than 16,000 displaced people.
20cm
The average rise in global sea levels since 1901, according to a Carbon Brief guest post on the challenges in projecting future rises.
Latest climate research
- Wildfire smoke poses negative impacts on organisms and ecosystems, such as health impacts on air-breathing animals, changes in forests’ carbon storage and coral mortality | Global Ecology and Conservation
- As climate change warms Antarctica throughout the century, the Weddell Sea could see the growth of species such as krill and fish and remain habitable for Emperor penguins | Nature Climate Change
- About 97% of South American lakes have recorded “significant warming” over the past four decades and are expected to experience rising temperatures and more frequent heatwaves | Climatic Change
(For more, see Carbon Brief’s in-depth daily summaries of the top climate news stories on Monday, Tuesday, Wednesday, Thursday and Friday.)
Captured
Repealing the US’s landmark “endangerment finding”, along with actions that rely on that finding, will slow the pace of US emissions cuts, according to Rhodium Group visualised by Carbon Brief. US president Donald Trump last week formally repealed the scientific finding that underpins federal regulations on greenhouse gas emissions, although the move is likely to face legal challenges. Data from the Rhodium Group, an independent research firm, shows that US emissions will drop more slowly without climate regulations. However, even with climate regulations, emissions are expected to drop much slower under Trump than under the previous Joe Biden administration, according to the analysis.
Spotlight
How a ‘tree invasion’ helped to fuel South America’s fires
This week, Carbon Brief explores how the “invasion” of non-native tree species helped to fan the flames of forest fires in Argentina and Chile earlier this year.
Since early January, Chile and Argentina have faced large-scale and deadly wildfires, including in Patagonia, which spans both countries.
These fires have been described as “some of the most significant and damaging in the region”, according to a World Weather Attribution (WWA) analysis covered by Carbon Brief.
In both countries, the fires destroyed vast areas of native forests and grasslands, displacing thousands of people. In Chile, the fires resulted in 23 deaths.
Multiple drivers contributed to the spread of the fires, including extended periods of high temperatures, low rainfall and abundant dry vegetation.
The WWA analysis concluded that human-caused climate change made these weather conditions at least three times more likely.
According to the researchers, another contributing factor was the invasion of non-native trees in the regions where the fires occurred.
The risk of non-native forests
In Argentina, the wildfires began on 6 January and persisted until the first week of February. They hit the city of Puerto Patriada and the Los Alerces and Lago Puelo national parks, in the Chubut province, as well as nearby regions.
In these areas, more than 45,000 hectares of native forests – such as Patagonian alerce tree, myrtle, coigüe and ñire – along with scrubland and grasslands, were consumed by the flames, according to the WWA study.
In Chile, forest fires occurred from 17 to 19 January in the Biobío, Ñuble and Araucanía regions.
The fires destroyed more than 40,000 hectares of forest and more than 20,000 hectares of non-native forest plantations, including eucalyptus and Monterey pine.
Dr Javier Grosfeld, a researcher at Argentina’s National Scientific and Technical Research Council (CONICET) in northern Patagonia, told Carbon Brief that these species, introduced to Patagonia for production purposes in the late 20th century, grow quickly and are highly flammable.
Because of this, their presence played a role in helping the fires to spread more quickly and grow larger.
However, that is no reason to “demonise” them, he stressed.
Forest management
For Grosfeld, the problem in northern Patagonia, Argentina, is a significant deficit in the management of forests and forest plantations.
This management should include pruning branches from their base and controlling the spread of non-native species, he added.
A similar situation is happening in Chile, where management of pine and eucalyptus plantations is not regulated. This means there are no “firebreaks” – gaps in vegetation – in place to prevent fire spread, Dr Gabriela Azócar, a researcher at the University of Chile’s Centre for Climate and Resilience Research (CR2), told Carbon Brief.
She noted that, although Mapuche Indigenous communities in central-south Chile are knowledgeable about native species and manage their forests, their insight and participation are not recognised in the country’s fire management and prevention policies.
Grosfeld stated:
“We are seeing the transformation of the Patagonian landscape from forest to scrubland in recent years. There is a lack of preventive forestry measures, as well as prevention and evacuation plans.”
Watch, read, listen
FUTURE FURNACE: A Guardian video explored the “unbearable experience of walking in a heatwave in the future”.
THE FUN SIDE: A Channel 4 News video covered a new wave of climate comedians who are using digital platforms such as TikTok to entertain and raise awareness.
ICE SECRETS: The BBC’s Climate Question podcast explored how scientists study ice cores to understand what the climate was like in ancient times and how to use them to inform climate projections.
Coming up
- 22-27 February: Ocean Sciences Meeting, Glasgow
- 24-26 February: Methane Mitigation Europe Summit 2026, Amsterdam, Netherlands
- 25-27 February: World Sustainable Development Summit 2026, New Delhi, India
Pick of the jobs
- The Climate Reality Project, digital specialist | Salary: $60,000-$61,200. Location: Washington DC
- Intergovernmental Panel on Climate Change (IPCC), science officer in the IPCC Working Group I Technical Support Unit | Salary: Unknown. Location: Gif-sur-Yvette, France
- Energy Transition Partnership, programme management intern | Salary: Unknown. Location: Bangkok, Thailand
DeBriefed is edited by Daisy Dunne. Please send any tips or feedback to debriefed@carbonbrief.org.
This is an online version of Carbon Brief’s weekly DeBriefed email newsletter. Subscribe for free here.
The post DeBriefed 20 February 2026: EU’s ‘3C’ warning | Endangerment repeal’s impact on US emissions | ‘Tree invasion’ fuelled South America’s fires appeared first on Carbon Brief.
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