Welcome to Carbon Brief’s DeBriefed.
An essential guide to the week’s key developments relating to climate change.
This week
Hottest hat-trick
STATE OF THE CLIMATE: Scientists have announced that 2025 was either the second or third hottest year on record, with close margins between last year and 2023, reported the Associated Press. The newswire noted that “temperature averages for 2025 hovered around – and mostly above – 1.4C of industrial era warming”. Bloomberg said that this happened despite the natural weather phenomenon La Niña, which “suppresses global temperatures”, meaning “heat from greenhouse gases countered that cooling influence”. Carbon Brief’s comprehensive analysis of the data found cumulative global ice loss also “reached a new record high in 2025”.
OVERHEATING OCEANS: Separately, the world’s oceans “absorbed colossal amounts of heat in 2025”, said the Guardian, setting “yet another new record and fuelling more extreme weather”. It added that the “extra heat makes the hurricanes and typhoons…more intense, causes heavier downpours of rain and greater flooding and results in longer marine heatwaves”.
FIRE AND ICE: Wildfires in Australia have destroyed around 500 structures, said the Sydney Morning Herald, with a “dozen major fires” still burning. A wildfire in Argentinian Patagonia has “blazed through nearly 12,000 hectares” of scrubland and forests, according to the Associated Press. Meanwhile, parts of the Himalayas are “snowless” for the first time in nearly four decades, signalling a “climatic anomaly”, reported the Times of India.
Around the world
- EMISSIONS REBOUND: US emissions rose 2% last year after two years of declines” due to a rise in coal power generation, said Axios, in coverage of research by the Rhodium Group.
- ‘UNINVESTABLE’ OIL: US president Donald Trump may “sideline” ExxonMobil from Venezuela’s oil market after its comment that Venezuela is “uninvestable”, reported CNBC. TotalEnergies is also “in no rush to return to Venezuela”, said Reuters.
- PRICE WARS: The EU issued guidelines that will allow tariffs on Chinese electric vehicles to be removed in exchange for minimum price commitments, said Reuters.
- ‘RECORD’ AUCTION: The UK government has secured “8.4 gigawatts of new offshore wind power” in a “record” auction, said Sky News. Although the auction saw some price rises, this will likely be “cost neutral” for consumers, Carbon Brief said – contrary to the “simplistic and misleading” narratives promoted by some media outlets.
- COP STRATEGY: The Guardian reported that Chris Bowen, the Australian minister appointed “president of negotiations” for COP31, plans to use his role to lobby “Saudi Arabia and others” on the need to phase out fossil fuels.
$2bn
The size of a new climate fund unveiled by the Nigerian government, according to Reuters.
Latest climate research
- Rooftop solar in the EU has the potential to meet 40% of electricity demand in a 100% renewable scenario for 2050 | Nature Energy
- Natural wildfires, such as those ignited by lightning strikes, have been increasing in frequency and intensity in sub-Saharan Africa, driven by climate change | Global and Planetary Change
- Engaging diverse citizens groups can lead to “more equitable, actionable climate adaptation” across four pilot regions in Europe | Frontiers in Climate
(For more, see Carbon Brief’s in-depth daily summaries of the top climate news stories on Monday, Tuesday, Wednesday, Thursday and Friday.)
Captured
Both China and India saw coal power generation fall in 2025, in the “first simultaneous drop in half a century”, found new analysis for Carbon Brief, which was widely reported around the world. It noted that, for both countries, the decline in coal was driven by new clean-energy capacity additions, which were “more than sufficient to meet rising demand”.
Spotlight
What are China experts watching for in 2026?
The year 2026 will be pivotal for China’s climate policy. In March, the government will release key climate and energy targets for 2030, the year by which China has pledged to have peaked its emissions.
At the same time, with the US increasingly turning away from climate policy and towards fossil fuel expansionism, China’s role in global climate action is more important than ever.
Carbon Brief asks leading experts what they are watching for from China over the year ahead.
Shuo Li, director of the China Climate Hub, Asia Society Policy Institute
After decades of rapid growth, independent analyses suggest China’s CO2 emissions may have plateaued or even begun to decline in 2025.
The transition from emissions growth to stabilisation and early decline will be the key watch point for 2026 and will be shaped by the forthcoming 15th five-year plan. [This plan will set key economic goals, including energy and climate targets, for 2030.]
However, the precise timing, scale and enforceability of these absolute emissions control measures remain under active debate. Chinese experts broadly agree that if the 2021-2025 period was characterised by continued emissions growth, and 2031-2035 is expected to deliver a clear decline, then 2026-2030 will serve as a critical “bridge” between the two.
Yan Qin, principal analyst, ClearBlue Markets
First, the 15th five-year plan inaugurates the “dual control of carbon” system. This year marks the first time industries and local governments face binding caps on total emissions, not just intensity.
Second, the national carbon market is aggressively tightening. With the inclusion of steel, cement and aluminum this year, regulators are executing a “market reset” – de-weighting older allowances [meaning they cannot be used to contribute to polluters’ obligations for 2026] and enforcing stricter benchmarks to bolster prices ahead of the full rollout of the EU’s carbon border adjustment mechanism.
Cecilia Trasi, senior policy advisor for industry and trade, ECCO
China’s solar manufacturing overcapacity is prompting Beijing’s first serious consolidation efforts. At the same time, its offshore wind technology is advancing rapidly [and there are] signals that Chinese wind companies are pursuing entry into European markets through local production, mirroring strategies adopted by battery manufacturers.
Together, these dynamics suggest that the next phase of cleantech competition will be shaped less by trade defense alone and more by the interaction between Chinese supply-side reforms and global market-absorption capacity.
Tu Le, managing director, Sino Auto Insights
China’s electric vehicle (EV) industry has been the primary force pushing the global passenger vehicle market toward clean energy. That momentum should continue. But a growing headwind has emerged: tariffs. Mexico, Brazil, Europe and the US are just a few of the countries raising barriers, complicating the next phase of global EV expansion.
One new wildcard: the US now effectively controls Venezuelan oil. If that meaningfully impacts global oil prices, it could either slow – or unexpectedly accelerate – the shift toward clean-energy vehicles.
Responses have been edited for length and clarity.
A full-length version of the article is available on the Carbon Brief website.
Watch, read, listen
SHAPING THE LAND: In addition to land use shaping the climate, climate change is now increasingly “changing the land”, according to satellite monitoring by World Resources Institute, creating a “dangerous feedback loop”.
‘POSITIVE TIPPING POINTS’: A commentary co-authored by climate scientist Prof Corinne Le Quéré in Nature argued that several climate trends have locked in “irreversible progress in climate action”.
FROM THE FLAMES: Nick Grimshaw interviewed musician and data analyst Miriam Quick on how she turned the 2023 Canadian wildfires into music on BBC Radio 6. (Skip to 1:41:45 to listen.)
Coming up
- 17 January: High Seas Treaty comes into force, New York
- 19-26 January: World Economic Forum annual meeting, Davos, Switzerland
- 21 January: IEA Q1 Gas Market Report, Paris
Pick of the jobs
- Eurasia Group, analyst, climate transition | Salary: Unknown. Location: Nairobi, Kenya or Mexico City, Mexico
- Heard, climate programme coordinator | Salary: £31,518. Location: London (hybrid)
- Environmental Investigation Agency, climate campaigner | Salary: £36,000- £40,000. Location: London (hybrid)
DeBriefed is edited by Daisy Dunne. Please send any tips or feedback to debriefed@carbonbrief.org.
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The post DeBriefed 16 January 2026: Three years of record heat; China and India coal milestone; Beijing’s 2026 climate outlook appeared first on Carbon Brief.
Drought and heatwaves occurring together – known as “compound” events – have “surged” across the world since the early 2000s, a new study shows.
Compound drought and heat events (CDHEs) can have devastating effects, creating the ideal conditions for intense wildfires, such as Australia’s “Black Summer” of 2019-20 where bushfires burned 24m hectares and killed 33 people.
The research, published in Science Advances, finds that the increase in CDHEs is predominantly being driven by events that start with a heatwave.
The global area affected by such “heatwave-led” compound events has more than doubled between 1980-2001 and 2002-23, the study says.
The rapid increase in these events over the last 23 years cannot be explained solely by global warming, the authors note.
Since the late 1990s, feedbacks between the land and the atmosphere have become stronger, making heatwaves more likely to trigger drought conditions, they explain.
One of the study authors tells Carbon Brief that societies must pay greater attention to compound events, which can “cause severe impacts on ecosystems, agriculture and society”.
Compound events
CDHEs are extreme weather events where drought and heatwave conditions occur simultaneously – or shortly after each other – in the same region.
These events are often triggered by large-scale weather patterns, such as “blocking” highs, which can produce “prolonged” hot and dry conditions, according to the study.
Prof Sang-Wook Yeh is one of the study authors and a professor at the Ewha Womans University in South Korea. He tells Carbon Brief:
“When heatwaves and droughts occur together, the two hazards reinforce each other through land-atmosphere interactions. This amplifies surface heating and soil moisture deficits, making compound events more intense and damaging than single hazards.”
CDHEs can begin with either a heatwave or a drought.
The sequence of these extremes is important, the study says, as they have different drivers and impacts.
For example, in a CDHE where the heatwave was the precursor, increased direct sunshine causes more moisture loss from soils and plants, leading to a drought.
Conversely, in an event where the drought was the precursor, the lack of soil moisture means that less of the sun’s energy goes into evaporation and more goes into warming the Earth’s surface. This produces favourable conditions for heatwaves.
The study shows that the majority of CDHEs globally start out as a drought.
In recent years, there has been increasing focus on these events due to the devastating impact they have on agriculture, ecosystems and public health.
In Russia in the summer of 2010, a compound drought-heatwave event – and the associated wildfires – caused the death of nearly 55,000 people, the study notes.
The record-breaking Pacific north-west “heat dome” in 2021 triggered extreme drought conditions that caused “significant declines” in wheat yields, as well as in barley, canola and fruit production in British Columbia and Alberta, Canada, says the study.
Increasing events
To assess how CDHEs are changing, the researchers use daily reanalysis data to identify droughts and heatwaves events. (Reanalysis data combines past observations with climate models to create a historical climate record.) Then, using an algorithm, they analyse how these events overlap in both time and space.
The study covers the period from 1980 to 2023 and the world’s land surface, excluding polar regions where CDHEs are rare.
The research finds that the area of land affected by CDHEs has “increased substantially” since the early 2000s.
Heatwave-led events have been the main contributor to this increase, the study says, with their spatial extent rising 110% between 1980-2001 and 2002-23, compared to a 59% increase for drought-led events.
The map below shows the global distribution of CDHEs over 1980-2023. The charts show the percentage of the land surface affected by a heatwave-led CDHE (red) or a drought-led CDHE (yellow) in a given year (left) and relative increase in each CDHE type (right).
The study finds that CDHEs have occurred most frequently in northern South America, the southern US, eastern Europe, central Africa and south Asia.
Threshold passed
The authors explain that the increase in heatwave-led CDHEs is related to rising global temperatures, but that this does not tell the whole story.
In the earlier 22-year period of 1980-2001, the study finds that the spatial extent of heatwave-led CDHEs rises by 1.6% per 1C of global temperature rise. For the more-recent period of 2022-23, this increases “nearly eightfold” to 13.1%.
The change suggests that the rapid increase in the heatwave-led CDHEs occurred after the global average temperature “surpasse[d] a certain temperature threshold”, the paper says.
This threshold is an absolute global average temperature of 14.3C, the authors estimate (based on an 11-year average), which the world passed around the year 2000.
Investigating the recent surge in heatwave-leading CDHEs further, the researchers find a “regime shift” in land-atmosphere dynamics “toward a persistently intensified state after the late 1990s”.
In other words, the way that drier soils drive higher surface temperatures, and vice versa, is becoming stronger, resulting in more heatwave-led compound events.
Daily data
The research has some advantages over other previous studies, Yeh says. For instance, the new work uses daily estimations of CDHEs, compared to monthly data used in past research. This is “important for capturing the detailed occurrence” of these events, says Yeh.
He adds that another advantage of their study is that it distinguishes the sequence of droughts and heatwaves, which allows them to “better understand the differences” in the characteristics of CDHEs.
Dr Meryem Tanarhte is a climate scientist at the University Hassan II in Morocco, and Dr Ruth Cerezo Mota is a climatologist and a researcher at the National Autonomous University of Mexico. Both scientists, who were not involved in the study, agree that the daily estimations give a clearer picture of how CDHEs are changing.
Cerezo-Mota adds that another major contribution of the study is its global focus. She tells Carbon Brief that in some regions, such as Mexico and Africa, there is a lack of studies on CDHEs:
“Not because the events do not occur, but perhaps because [these regions] do not have all the data or the expertise to do so.”
However, she notes that the reanalysis data used by the study does have limitations with how it represents rainfall in some parts of the world.
Compound impacts
The study notes that if CDHEs continue to intensify – particularly events where heatwaves are the precursors – they could drive declining crop productivity, increased wildfire frequency and severe public health crises.
These impacts could be “much more rapid and severe as global warming continues”, Yeh tells Carbon Brief.
Tanarhte notes that these events can be forecasted up to 10 days ahead in many regions. Furthermore, she says, the strongest impacts can be prevented “through preparedness and adaptation”, including through “water management for agriculture, heatwave mitigation measures and wildfire mitigation”.
The study recommends reassessing current risk management strategies for these compound events. It also suggests incorporating the sequences of drought and heatwaves into compound event analysis frameworks “to enhance climate risk management”.
Cerezo-Mota says that it is clear that the world needs to be prepared for the increased occurrence of these events. She tells Carbon Brief:
“These [risk assessments and strategies] need to be carried out at the local level to understand the complexities of each region.”
The post Heatwaves driving recent ‘surge’ in compound drought and heat extremes appeared first on Carbon Brief.
Heatwaves driving recent ‘surge’ in compound drought and heat extremes
Greenhouse Gases
DeBriefed 6 March 2026: Iran energy crisis | China climate plan | Bristol’s ‘pioneering’ wind turbine
Welcome to Carbon Brief’s DeBriefed.
An essential guide to the week’s key developments relating to climate change.
This week
Energy crisis
ENERGY SPIKE: US-Israeli attacks on Iran and subsequent counterattacks across the Middle East have sent energy prices “soaring”, according to Reuters. The newswire reported that the region “accounts for just under a third of global oil production and almost a fifth of gas”. The Guardian noted that shipping traffic through the strait of Hormuz, which normally ferries 20% of the world’s oil, “all but ground to a halt”. The Financial Times reported that attacks by Iran on Middle East energy facilities – notably in Qatar – triggered the “biggest rise in gas prices since Russia’s full-scale invasion of Ukraine”.
‘RISK’ AND ‘BENEFITS’: Bloomberg reported on increases in diesel prices in Europe and the US, speculating that rising fuel costs could be “a risk for president Donald Trump”. US gas producers are “poised to benefit from the big disruption in global supply”, according to CNBC. Indian government sources told the Economic Times that Russia is prepared to “fulfil India’s energy demands”. China Daily quoted experts who said “China’s energy security remains fundamentally unshaken”, thanks to “emergency stockpiles and a wide array of import channels”.
‘ESSENTIAL’ RENEWABLES: Energy analysts said governments should cut their fossil-fuel reliance by investing in renewables, “rather than just seeking non-Gulf oil and gas suppliers”, reported Climate Home News. This message was echoed by UK business secretary Peter Kyle, who said “doubling down on renewables” was “essential” amid “regional instability”, according to the Daily Telegraph.
China’s climate plan
PEAK COAL?: China has set out its next “five-year plan” at the annual “two sessions” meeting of the National People’s Congress, including its climate strategy out to 2030, according to the Hong Kong-based South China Morning Post. The plan called for China to cut its carbon emissions per unit of gross domestic product (GDP) by 17% from 2026 to 2030, which “may allow for continued increase in emissions given the rate of GDP growth”, reported Reuters. The newswire added that the plan also had targets to reach peak coal in the next five years and replace 30m tonnes per year of coal with renewables.
ACTIVE YET PRUDENT: Bloomberg described the new plan as “cautious”, stating that it “frustrat[es] hopes for tighter policy that would drive the nation to peak carbon emissions well before president Xi Jinping’s 2030 deadline”. Carbon Brief has just published an in-depth analysis of the plan. China Daily reported that the strategy “highlights measures to promote the climate targets of peaking carbon dioxide emissions before 2030”, which China said it would work towards “actively yet prudently”.
Around the world
- EU RULES: The European Commission has proposed new “made in Europe” rules to support domestic low-carbon industries, “against fierce competition from China”, reported