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President Xi Jinping has personally pledged to cut China’s greenhouse gas emissions to 7-10% below peak levels by 2035, while “striving to do better”.

This is China’s third pledge under the Paris Agreement, but is the first to put firm constraints on the country’s emissions by setting an “absolute” target to reduce them.

China’s leader spoke via video to a UN climate summit in New York organised by secretary general António Guterres, making comments seen as a “veiled swipe” at US president Donald Trump.

The headline target, with its undefined peak-year baseline, falls “far short” of what would have been needed to help limit warming to well-below 2C or 1.5C, according to experts.

Moreover, Xi’s pledge for non-fossil fuels to make up 30% of China’s energy is far below the latest forecasts, while his goal for wind and solar capacity to reach 3,600 gigawatts (GW) implies a significant slowdown, relative to recent growth.

Overall, the targets for China’s new 2035 “nationally determined contribution” (NDC) under the Paris Agreement have received a lukewarm response, described as “conservative”, “too weak” and as not reflecting the pace of clean-energy expansion on the ground.

Nevertheless, Li Shuo, director of the China Climate Hub at the Asia Society Policy Institute (ASPI), tells Carbon Brief that the pledge marks a “big psychological jump for the Chinese”, shifting from targets that constrained emissions growth to a requirement to cut them.

Below, Carbon Brief unpacks what China’s new targets mean for its emissions and energy use, pending further details once its full NDC is formally published in full.

Carbon Brief is hosting a webinar about China’s new climate goals on Monday. Register here.

What is in China’s new climate pledge?

For now, the only available information on China’s 2035 NDC is the short series of pledges in Xi’s speech to the UN.

(This article will be updated once the NDC itself is published on the UN’s website.)

Xi’s speech is the first time his country has promised to place an absolute limit on its greenhouse gas emissions, marking a significant shift in approach.

Xi had previously pledged that China would peak its carbon dioxide (CO2) emissions “before 2030”, without defining at what level, reaching “carbon neutrality” by 2060.

He also outlined a handful of other key targets for 2035, shown in the table below against the goals set in previous NDCs.

Indicators
Targets for 2030
Targets for 2035
First NDC (2016) NDC 2.0 (2021) NDC 3.0 (2025)
Emissions target Peak CO2 “around 2030”, “making best efforts to peak early” Peak CO2 “before 2030” and “achieve carbon neutrality before 2060” Cut GHGs to 7-10% below peak levels by 2035
CO2 intensity reduction (compared to 2005) 60-65% >65%
Non-fossil share in primary energy mix Around 20% Around 25% 30%
Forest stock volume increase (compared to 2005) Around 4.5bn cubic metres 6bn cubic metres 11bn cubic metres
Installed capacity of wind and solar power >1,200GW >3,600GW

In his speech, Xi also said that, by 2035, “new energy vehicles” would be the “mainstream” for new vehicle sales, China’s national carbon market would cover all “major high-emission industries” and that a “climate-adaptive society” would be “basically established”.

Simon Evans on Bluesky:  China's president Xi Jinping unexpectedly joins the UN climate summit, by video, to offer his nation's 2035 climate pledge

This is the first time that China’s targets will cover the entire economy and all greenhouse gases (GHGs), a move that has been long signalled by Chinese policymakers.

In 2023, the joint China-US Sunnylands statement, released during the Biden administration, had said that both countries’ 2035 NDCs “will be economy-wide, include all GHGs and reflect…[the goal of] holding the increase in global average temperature to well-below 2C”.

Subsequently, the world’s first global stocktake, issued at COP28 in Dubai, “encourage[d]” all countries to submit “ambitious, economy-wide emission reduction targets, covering all GHGs, sectors and categories…aligned with limiting global warming to 1.5C”.

Responding to this the following year, executive vice-premier and climate lead Ding Xuexiang stated at COP29 in Baku that China’s 2035 climate pledge would be economy-wide and cover all GHGs. (His remarks did not mention alignment with 1.5C.)

This was reiterated by Xi at a climate meeting between world leaders in April 2025.

The absolute target for all greenhouse gases marks a turning point in China’s emissions strategy. Until now, China’s emissions targets have largely focused on carbon intensity, the emissions per unit of GDP, a metric that does not directly constrain emissions as a whole.

The change aligns with China’s broader shift from “dual control of energy” towards “dual control of carbon”, a policy that replaces China’s current tradition of setting targets for energy intensity and total energy consumption, with carbon intensity and carbon emissions.

Under the policy, in the 15th five-year plan period (2026-2030), China will continue to centre carbon intensity as its main metric for emissions reduction. After 2030, an absolute cap on carbon emissions will become the predominant target.

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What is China’s first ‘absolute’ emissions reduction target?

In his UN address, Xi pledged to cut China’s “economy-wide net greenhouse gas emissions” to 7-10% below peak levels by 2035, while “striving to do better”.

This means the target includes not just CO2, but also methane, nitrous oxide (N2O) and F-gases, all of which make significant contributions to global warming. (See: What does China say about non-CO2 emissions?)

The reference to “economy-wide net” emissions means that the target refers to the total of China’s emissions, from all sources, minus removals, which could come from natural sources, such as afforestation, or via “carbon dioxide removal” technologies.

Outlining the targets, Xi told the UN summit that they represented China’s “best efforts, based on the requirements of the Paris Agreement”. He added:

“Meeting these targets requires both painstaking efforts by China itself and a supportive and open international environment. We have the resolve and confidence to deliver on our commitments.”

China has a reputation for under-promising and over-delivering.

Prof Wang Zhongying, director-general of the Energy Research Institute, a Chinese government-affilitated thinktank, told Carbon Brief in an interview at COP26 that China’s policy targets represent a “bottom line”, which the policymakers are “definitely certain” about meeting. He views this as a “cultural difference”, relative to other countries. 

The headline target announced by Xi this week has, nevertheless, been seen as falling far short of what was needed.

A series of experts had previously told Carbon Brief that a 30% reduction from 2023 levels was the absolute minimum contribution towards a 1.5C global limit, with many pointing to much larger reductions in order to be fully aligned with the 1.5C target.

The figure below illustrates how China’s 2035 target stacks up against these levels.

(Note that the timing and level of peak emissions is not defined by China’s targets. The pledge trajectory is constrained by China’s previous targets for carbon intensity and expected GDP growth, as well as the newly announced 7-10% range. It is based on total emissions, excluding removals, which are more uncertain.)

Economy-wide greenhouse gas emissions excluding removals, billion tonnes of CO2 equivalent
Economy-wide greenhouse gas emissions excluding removals, billion tonnes of CO2 equivalent (GtCO2e). The pledge pathway shows the 7-10% range of 2035 cuts, followed by an indicative straight line to “carbon neutrality” in 2060, with an allowance for removals. The “minimum needed” pathway cuts emissions to 30% below 2023 levels by 2035 and continues in the same way to 2060. The “1.5C-aligned” pathway is the average of scenarios from the IPCC. Source: Centre for Research on Energy and Clean Air (CREA).

Analysis by the Asia Society Policy Institute also found that China’s GHG emissions “must be reduced by at least 30% from the peak through 2035” in order to align with 1.5C warming. 

It said that this level of ambition was achievable, due to China’s rapid clean-energy buildout and signs that the nation’s emissions may have already reached a peak.

Similarly, the International Energy Agency (IEA) said last October that implementing the collective goals of the first stocktake – such as tripling renewables by 2030 – as well as aligning near-term efforts with long-term net-zero targets, implied emissions cuts of 35-60% by 2035 for emerging market economies, a grouping that includes China.

In response to these sorts of numbers, Teng Fei, deputy director of Tsinghua University’s Institute of Energy, Environment and Economy, previously described a 30% by 2035 target as “extreme”, telling Agence France-Presse that this would be “too ambitious to be achievable”, given uncertainties around China’s current development trajectory.

In contrast, a January 2025 academic study, co-authored by researchers from Chinese government institutions and top universities and understood to have been influential in Beijing’s thinking, argued for a pledge to cut energy-related CO2 emissions “by about 10% compared with 2030”, estimating that emissions would peak “between 2028 and 2029”.

(Other assessments have pegged relevant indicators, such as emissions and coal consumption, as peaking in 2028 at the earliest.)

The relatively modest emissions reduction range pledged by Xi, as well as the uncertainty introduced by avoiding a definitive baseline year, has disappointed analysts.

In a note responding to Xi’s pledges, Li Shuo and his ASPI colleague Kate Logan write that he has “misse[d] a chance at leadership”.

Li tells Carbon Brief that factors behind the modest target include the “domestic economic slowdown and uncertain economic prospects, the weakening global climate momentum and the turbulent geopolitical environment”. He adds:

“I also think it is a big psychological jump for the Chinese, shifting for the first time after decades of rapid growth, from essentially climate targets that meant to contain further increase to all of a sudden a target that forces emissions to go down.”

Instead of a target consistent with limiting warming to 1.5C, China’s 2035 pledge is more closely aligned with 3C of warming, according to analysis by CREA’s Lauri Myllyirta.

Lauri Myllyvirta on Bluesky: As China prepares to publish its emission reduction targets for 2035, likely the most significant climate announcement of the year

Climate Action Tracker says that China’s target is “unlikely to drive down emissions”, because it was already set to achieve similar reductions under current policies. 

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What has China pledged on non-fossil energy, coal and renewables?

In addition to a headline emissions reduction target, Xi also pledged to expand non-fossil fuels as a share of China’s energy mix and to continue the rollout of wind and solar power.

This continues the trend in China’s previous NDC.

Notably, however, Xi made no mention of efforts to control coal in his speech.

In its second NDC, focused on 2030, China had pledged to “strictly control coal-fired power generation projects”, as well as “strictly limit” coal consumption between 2021-2025 and “phase it down” between 2026-2030. It also said China “will not build new coal-fired power projects abroad”.

It remains to be seen if coal is addressed in China’s full NDC for 2035.

The 2030 NDC also stated that China would “increase the share of non-fossil fuels in primary energy consumption to around 25%” – and Xi has updated this to 30% by 2035.

These targets are shown in the figure below, alongside recent forecasts from the Sinopec Economics and Development Research Institute, which estimated that non-fossil fuel energy could account for 27% of primary energy consumption in 2030 and 36% in 2035.

As such, China’s targets for non-fossil energy are less ambitious than the levels implied by current expectations for growth in low-carbon sources.

Past, targeted and forecast shares of China’s energy, by source
Past, targeted and forecast shares of China’s energy, by source, %. Source: Sinopec Economics and Development Research Institute, Xi’s 2035-pledge speech.

In a recent meeting with the National People’s Congress Standing Committee – the highest body of China’s state legislature – environment minister Huang Runqiu said that progress on China’s earlier target for increasing non-fossil energy’s share of energy consumption was “broadly in line” with the “expected pace” of the 2030 NDC. 

On wind and solar, China’s 2030 NDC had pledged to raise installed capacity to more than 1,200GW – a target that analysts at the time told Carbon Brief was likely to be beaten. It was duly met six years early, with capacity standing at 1,680GW as of the end of July 2025. 

Xi has set a 2035 target of reaching 3,600GW of wind and solar capacity.

This looks ambitious, relative to other countries and global capacity of around 3,000GW in total as of 2024, but represents a significant slowdown from the recent pace of growth.

Given its current capacity, China would need to install around 200GW of new wind and solar per year and 2,000GW in total to reach the 2035 target. Yet it installed 360GW in 2024 and 212GW of solar alone in the first half of this year.

Myllyvirta tells Carbon Brief this pace of additions is “not enough to even peak emissions [in the power sector] unless energy demand growth slows significantly”.

While the pace of demand growth is a key uncertainty, a recent study by Michael R Davidson, associate professor at the University of California, San Diego, with colleagues at Tsinghua University, suggested that deploying 2,910-3,800GW of wind and solar by 2035 would be consistent with a 2C warming pathway.

Davidson tells Carbon Brief that “most experts within China do not see the [recent] 300+GW per year growth as sustainable”. Still, he adds that the lower levels outlined in his study could be consistent with cutting power-sector emissions 40% by 2035, subject to caveats around whether new capacity is well-sited and appropriately integrated:

“We found that 40% emissions reductions in the power sector can be supported by 3,000-3,800GW wind and solar capacity [by 2035]. Most of the capacity modeling really depends on integration and quality of resources.”

Renewable energy’s share of consumption in China has lagged behind its record capacity installations, largely due to challenges with updating grid infrastructure and economic incentives that lock in coal-fired power. 

In Davidson’s study, capacity growth of up to 3,800GW would see wind and solar reaching around 40% of total power generation by 2030 and 50% by 2035.

Meanwhile, China will need to install around 10,000GW of wind and solar capacity to reach carbon neutrality by 2060, according to a separate report by the Energy Research Institute, a Chinese government-affilitated thinktank. 

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What does China say about non-CO2 emissions?

This is the first time that one of China’s NDC pledges has explicitly covered the emissions from non-CO2 GHGs.

However, while Xi’s speech made clear that China’s headline emissions goal for 2035 will cover non-CO2 gases, such as methane, nitrous oxide and F-gases, he did not give further details on whether the NDC would set specific targets for these emissions.

In China’s 2030 NDC, the country stated it would “step up the control of key non-CO2 GHG emissions”, including through new control policies, but did not include a quantitative emissions reduction target.

In preparation for a comprehensive greenhouse gas emissions target, China has issued action plans for methane, hydrofluorocarbons (HFCs, one type of F-gas) and nitrous oxide.

The nitrous oxide action plan, published earlier this month, called for emissions per unit of production for specific chemicals to decrease to a “world-leading level” by 2030, but did not set overarching limits.

Similarly, the overarching methane action plan, issued in late 2023, listed several key tasks for reducing emissions in the energy, agriculture and waste sectors, but lacked numerical targets for emissions reduction.

A subsequent rule change in December 2024 tightened waste gas requirements for coal mines. Under the new rules, Reuters reports, any coal mine that releases “emissions with methane content of 8% or higher” must capture the gas, and either use or destroy it – down from a previous threshold of 30%.

But analysts believe that the true challenge of coal-mine methane emissions may come from abandoned mines, which, one study found, have surged in the past 10 years and will likely overtake emissions from active coal mines to become the prime source of methane emissions in the coal sector.

As the demand for coal could be facing a “structural decline”, the number of abandoned mines is expected to grow significantly. 

Meanwhile, the HFC plan did set quantitative targets. The country aims to lower HFC production by 2029 by 10% from a 2024 baseline of 2GtCO2e, while consumption would also be reduced 10% from a baseline of 0.9gtCO2e in this timeframe – in line with China’s obligations under the Kigali Amendment to the Montreal Protocol on ozone protection.

From 2026, China will “prohibit” the production of fridges and freezers using HFC refrigerants.

However, the action plan does not govern China’s exports of products that use HFCs – a significant source of emissions.

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The post Q&A: What does China’s new Paris Agreement pledge mean for climate action? appeared first on Carbon Brief.

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UN asks AI companies to reveal full environmental impacts

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The head of the United Nations has launched an initiative aimed at holding artificial intelligence companies accountable for their exploding environmental impacts, including their carbon emissions, the amount of water and land used for data centres, and the energy they consume.

During a speech at London Climate Action Week on Tuesday, António Guterres noted that AI can accelerate climate solutions, among other key challenges, and said its potential must be harnessed.

“But AI is also hungry for land, water and power,” he emphasised, adding that the data centres needed to run AI models already consume more electricity than most countries.

The UN Secretary-General repeated a call he first made in July 2025 for all big AI companies to commit to power every data centre with renewable energy by 2030.

Some tech firms have announced they are sourcing or building out clean energy to run their hubs, but growing power demand is also contributing to gas-fired generation in the US, according to data from Global Energy Monitor.

The International Energy Agency (IEA) estimates that data centres are set to more than double the emissions from the electricity they use between 2024 and 2030 in a high-growth scenario. But AI’s use could lead to far larger reductions in the energy sector through efficiency gains if adopted widely.

    ‘No more hidden costs’

    Proposing the new “AI Environmental Transparency Initiative” on Tuesday, Guterres also urged big AI firms companies to measure and publicly disclose the full environmental impact of their systems, including their carbon, water, and land footprints.

    “No more hidden costs. No more shifting the burden onto those least able to bear it. It is time to come clean,” he said in a major speech on responding to the world’s twin climate and energy crises. “If AI is to help build a better future, it must be honest about what it costs us now.”

    A report issued earlier this month by the UN University Institute for Water, Environment and Health noted that most current assessments of AI’s environmental cost focus on carbon emissions from training models. But, it added, this misses a substantial part of the picture.

    Every kilowatt-hour of electricity for AI also carries a water footprint, from cooling and generation, and a land footprint, from infrastructure and supply chains, it said.

    Explainer: Will AI data centres make or break the energy transition?

    The report estimated that AI data centres globally could consume 945 terawatt-hours of electricity annually by 2030 – more power than all but five countries and roughly twice France’s 2025 consumption.

    Offsetting this carbon footprint by 2030 would require growing some 6.7 billion trees over 10 years, it calculated. Producing power for the data centres would consume water equal to the basic needs of 1.3 billion people in sub-Saharan Africa for a year and take up land of more than 14,500 square kilometers, roughly twice the Jakarta metropolitan area.

    The European Union said earlier this month it will develop minimum energy-efficiency standards for both new and existing data centres, with a “needs assessment” ​due by 2027, Reuters reported. It’s also planning ⁠a sustainability label for data centres, covering criteria including water use and clean energy supply – but that has been delayed.    

    US community push-back 

    Asked after his speech what the response had been, the UN chief said “we’ll see”, without giving more details.

    But, he argued that, in his view, the push for transparency “is perfectly reasonable and even positive for the AI industry, because eventually some people will say that they consume much more than they really do”. “I think the truth is essential,” he added.

    Concerns about the environmental impacts of AI and the infrastructure needed to run the technology have led to growing opposition in some communities, especially in the US.

    This month, Monterey Park in Los Angeles County was the first city in the United States to enact a citywide prohibition on data centres through a voter-approved ballot measure. The developers behind a proposed centre in the area had already pulled the project in April amid an increasingly hostile local environment and regulatory uncertainty.

    The vote that stopped a data center: US communities query resource-hungry AI

    According to nonprofit Data Center Watch, around $64 billion-worth of data centre projects nationwide were delayed or blocked between May 2024 and March 2025 as communities pushed back against them.

    Industry lobby groups argue that data centres can provide economic benefits in their host communities. According to the US-based Data Center Coalition, which represents big operators and developers, data centres generate tax revenue, support construction and technical jobs, and provide infrastructure needed for cloud computing, scientific research and AI development.

    The industry has also challenged claims that data centers necessarily raise electricity costs for households.

    Force for good?

    The UN chief said benefits can be few in the places that are home to the data centre, while “communities are often left in the dark about the environmental impact of the infrastructure rising around them”.

    Guterres said companies have an “obligation” to be clear and open about the services they are offering but also the level of resources they require. 

    “Transparency is essential for the decisions that communities must make – and transparency is essential even for the future of artificial intelligence, and to make sure that artificial intelligence is essentially a force for good,” he told an audience of climate professionals in London

    A senior UN official told journalists ahead of Tuesday’s announcement that the AI industry has started to talk about and disclose some of their impacts, but those efforts are not yet comprehensive enough.

    The hope is that the new initiative will “encourage the industry to come together and take further action on it”, the official said.

    The post UN asks AI companies to reveal full environmental impacts appeared first on Climate Home News.

    UN asks AI companies to reveal full environmental impacts

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    Prof Philippe Ciais: The world’s most highly cited climate scientist

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    Phillipe Ciais has spent almost four decades researching the planet’s carbon cycle – and the ways in which humans have been impacting its balance.

    Based at the Laboratoire des Sciences du Climat et de l’Environnement (LSCE) on the outskirts of Paris, Ciais (pronounced “see-es”) has been listed as an author on more than 1,300 peer-reviewed studies.

    In fact, analysis of Carbon Brief’s Cosmos database reveals that – by some distance – he is the most highly cited climate scientist in the world.

    In a wide-ranging interview, he discusses:

    The post Prof Philippe Ciais: The world’s most highly cited climate scientist appeared first on Carbon Brief.

    https://www.carbonbrief.org/prof-philippe-ciais-the-worlds-most-highly-cited-climate-scientist/

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    Cited 23 June 2026: Project Cosmos launch | Science ‘under attack’ at Bonn | Emissions inequality

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    Welcome to Cited, your essential guide to new climate research.

    In the news

    SCIENCE ‘UNDER ATTACK’: Climate Home News reported that “dozens” of countries called out “coordinated attacks” aimed at “undermining the role of climate science” at UN climate talks in Bonn, Germany, last week. According to the outlet, the countries said that UN decision-making had to remain based on the “best available science”, including the reports of the Intergovernmental Panel on Climate Change. One negotiator said that India and Saudi Arabia “opposed calls in draft texts to encourage scientific work on scenarios that would minimise the magnitude and duration of any overshoot of 1.5C”, the article noted. For more, read Carbon Brief’s summary of the negotiations.

    REPORT OPPOSITION: “Oil industry allies” in the US are targeting a report on extreme weather attribution, due to be published by the National Academies of Sciences, Engineering and Medicine, according to Politico. The outlet reported that the “heightened scrutiny – which involves a secretive opposition research group scouring scientists’ emails – has prompted two people to leave the 15-person panel tasked with producing the report”. Separately, the Guardian reported that the Trump administration has “reversed its decision” to dismantle the Ocean Observatories Initiative, a $368m deep-sea observation system.

    SUPER EL NIÑO: BBC News reported that the US National Oceanic and Atmospheric Administration announced that El Niño had “officially begun”. Forecasts suggest the event could be among the “strongest ever recorded”, it added. Meanwhile, a “vigorous debate” is taking place about whether climate change is making the El Niño phenomenon more intense, according to the New York Times. The outlet explained that some scientists see the run of “comparatively strong” El Niño events in recent decades as an indication that “climate change is supercharging El Niño”. However, it added that “others say there is no clear evidence to support that theory”.

    Research picks

    Water

    • Global sea level rise has nearly tripled the number of days since the 1970s when coastal water levels have surpassed average tide gauge readings | Science Advances
    • As the Arctic warms, increased iceberg activity could “reshape” deep-sea habitats and “elevate” navigational hazards as maritime traffic expands | Nature
    • Sea level rise has quadrupled the frequency of extreme coastal sea-level events since the year 1900 | Nature Climate Change

    Inequality

    • The top 10% of consumers are responsible for $1.7-5.7tn of environmental damage each year, surpassing international climate and biodiversity financing gaps | Communications Sustainability
    • Calculating an individual’s emissions based on their asset ownership suggests that wealthier people are responsible for an even higher share of global greenhouse gas emissions than indicated by past studies | Nature Climate Change
    • A plan that places equity at the “centre” of climate adaptation efforts in cities is needed to address the “stark disparities” between “affluent” and “disadvantaged” urban communities’ ability to prepare for extreme heat | PLOS Climate

    Extremes

    • In the western US, 42% of burned area over 2001-24 occurred during, and immediately following, heatwaves | Science Advances
    • “Hot-to-wet” whiplash events have become more frequent across Australia over the past century, with south-eastern Australia emerging as a hotspot | Journal of Climate
    • Rapid urbanisation, combined with more intense rainfall from tropical cyclones, have increased people’s exposure to “extreme” rainfall from tropical cyclones across China | Journal of Hydrometeorology

    Captured

    Chart showing that population growth and a warming world have driven up the number of people exposed to extreme heat since the 1970s

    One billion additional people face at least one day of “extreme heat stress” every year compared to the 1970s, according to research published in Nature Climate Change.

    The chart shows changes in “strong” (top), “very strong” (middle) and “extreme” (bottom) heat stress, defined as a “universal thermal climate index” above 32C, 38C and 46C, respectively. The grey bar shows the percentage of the global population exposed to at least one, 30 or 90 days of heat stress in 1970. The light and dark blue bars show the number of additional people experiencing heat stress over 2015-24 due to population growth and rising global temperatures, respectively.


    10%

    Equivalent damage to the UK’s GDP caused by climate change if global warming reaches 4C by 2100, according to new research in Nature Climate Change. The study estimates a range of 2-20%.


    Spotlight

    Introducing: Project Cosmos

    Carbon Brief explains how it built a major new database of climate science research and unveils a new ranking of the 500 most highly cited publications, authors and institutions in climate science.

    This week, Carbon Brief launched Project Cosmos – the world’s largest and most complete database of climate change research.

    The database features more than 1.8m academic papers, books and reports, capturing the vast body of human knowledge about climate change that has accumulated over more than a century of academic study.

    The climate science “universe” is based on reports from the Intergovernmental Panel on Climate Change (IPCC), which are recognised as the world’s most authoritative summaries of the latest climate science.

    Since its first report was published in 1990, humanity’s knowledge about human-caused climate change has ballooned. The IPCC has published six sets of reports in total – each one longer than the last.

    In total, IPCC reports reference more than 100,000 other papers, books and reports. This is the core of our climate science universe. Carbon Brief then built on this core, by looking at four other sources of data. Read more about how the Cosmos database was created here.

    Every single publication in the Cosmos database is linked to at least one other through references. Visualising these links reveals a “galaxy” of references. In the image above, each colour and cluster reveals different topics and densities of research. Explore the galaxy in an interactive map here.

    Cosmos 500

    As part of an initial wave of preliminary analysis to demonstrate the scope of the Project Cosmos database, Carbon Brief has ranked the 500 most highly cited publications, authors and institutions in the database.

    The most highly cited climate scientist is Prof Philippe Ciais, who has spent almost four decades researching the planet’s carbon cycle – and the ways in which humans have been impacting its balance. Carbon Brief recently interviewed Ciais in Paris.

    The US tops the tables for the most highly-cited authors and institutions. Almost half of the 500 most highly-cited authors are from US institutions. This raises particular concerns for the future of climate science, as American climate scientists and institutions are coming under attack under the Trump administration.

    Experts from global south countries account for only 4% of all authors in the Cosmos 500. China stands out as the most highly-cited global south country. Meanwhile, only 10% of authors in the Cosmos 500 are women.

    There are many possibilities for future avenues of research using the Cosmos database. Over time, the database could be used to reveal, for example, how interest in different areas of climate science has changed over time, plus identify potential knowledge gaps and, thus, opportunities for future research.

    Carbon Brief invites researchers – including academics, journalists and analysts – to submit their own proposals for co-authored studies, literature reviews and analytical projects.

    Preprints to watch

    Carbon Brief’s pick of new papers still going through peer review

    • Regional reductions in aerosol emissions can “temporarily amplify” the likelihood of record-breaking heat events | Environmental Research: Climate
    • Analysis of Reddit posts suggests the Fridays for Future movement has created “wider awareness” of global warming by drawing attention to climate change and “climate actions” | npj climate action
    • Periods of simultaneous low wind and solar power generation, known as “renewable energy droughts”, will “intensify progressively” as the planet warms | Nature portfolio

    Noticeboard

    • 28-30 June: Seventh global conference on climate and sustainable development goal synergies, Bangkok, Thailand
    • 29 June-1 July: Exeter climate conference, Exeter, UK
    • 29 June-1 July: National Academy of Sciences hybrid workshop on seabed critical mineral resources, Irvine, US
    • 30 June: Submission deadline for abstracts for MedCLIVAR conference, scheduled for 21-25 September in Limassol, Cyprus 
    • 30 June: Application deadline for postdoctoral position in ice-ocean interactions at the Physics Laboratory of Ecole Normale Supérieure de Lyon | Salary: €3,071-4,714 per month. Location: Lyon, France
    • 30 June: Submissions open for abstracts for the pan-African conference on environment, climate change and health, scheduled for 21-24 October in Nairobi, Kenya 
    • 8 July: Application deadline for position as research officer in climate science and law at the Grantham Research Institute | Salary: £43,277-51,714. Location: London, UK
    • 10 July: Application deadline for position as associate or senior editor at Nature Water | Salary: Unknown. Location: Shanghai, Beijing or Milan

    Cited is researched and written by Cecilia Keating, Robert McSweeney, Ayesha Tandon, Daisy Dunne and Dr Giuliana Viglione.

    Please send tips, feedback and upcoming climate research to cited@carbonbrief.org

    This is an online version of Carbon Brief’s fortnightly Cited email newsletter. Subscribe for free here.

    The post Cited 23 June 2026: Project Cosmos launch | Science ‘under attack’ at Bonn | Emissions inequality appeared first on Carbon Brief.

    Cited 23 June 2026: Project Cosmos launch | Science ‘under attack’ at Bonn | Emissions inequality

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