One of the headline outcomes to emerge from COP30 was a new target to “at least triple” finance for climate adaptation in developing countries by 2035.
Vulnerable nations stress that they urgently need to strengthen their infrastructure as climate hazards intensify, but they struggle to attract funding for these efforts.
The new goal, which builds on a previous target agreed four years ago to double adaptation finance by 2025, was a central demand for many developing countries at the UN climate summit in Belém.
Yet, throughout the two-week negotiations, developed-country parties opposed new targets that would give them more financial obligations.
As a result of this opposition, the final target is less ambitious than the idea originally floated by developing countries, resulting in less pressure on developed countries to provide public funds.
This article looks at precisely what the final COP30 outcome does – and does not – say about tripling adaptation finance, as well as the implications for developing countries.
- 1) The final COP30 decision delayed the ‘tripling’ target by five years and added uncertainty
- 2) The new target is looser than the previous ‘doubling’ goal for adaptation finance
- 3) The target also falls far short of developing countries’ adaptation needs
1. The final COP30 decision delayed the ‘tripling’ target by five years and added uncertainty
At COP26 in Glasgow in 2021, a target was agreed for developed nations to double the amount of adaptation finance they would provide to developing countries by 2025.
This target has been broadly interpreted as approximately $40bn by 2025, using the agreed baseline of $18.8bn in 2019.
As of 2022, the latest year for which official data is available, annual adaptation finance from developed countries had reached $28.9bn. (Final confirmation of whether the target has been met will not come until 2027, due to the delay in climate-finance reporting.)
With the “doubling” target set to expire this year, some developing countries came to COP30 with the aim of agreeing on a new target.
The least-developed countries (LDCs) group called for “a tripling of grant-based adaptation finance by 2030 to at least $120bn”. They were backed by small-island states, the African group and some Latin American countries.
This proposal was included in the first draft of the “global mutirão“, the key overarching decision text produced by the COP30 presidency.
However, the text that ultimately emerged pushed the “tripling” deadline back to 2035. As the chart below shows, this delayed target could mean far less adaptation finance in the short term, due to developed countries taking longer to ramp up their contributions.
Lina Yassin, an adaptation advisor to the LDCs, tells Carbon Brief that this goal is “fundamentally out of step” with the obligation for developed countries to achieve a “balance” between adaptation and mitigation finance.
(This obligation is set out in the Paris Agreement, but, in practice, developed countries provide far more finance for mitigation initiatives, such as clean-energy projects. Adaptation finance has been around a third of the total in recent years and this would still be the case if the overall $300bn climate-finance and tripling adaptation finance targets are both met.)
The final text also removed a mention of 2025 as the baseline year, adding uncertainty as to what precisely the 2035 target means.
“The [LDCs] wanted a clear number, tied to a clear baseline year, that you can actually track and hold providers accountable for,” Yassin explains.
The text does allude to the “doubling” target agreed at COP26 in Glasgow, which some analysts say is an indicator of what the baseline should be.
“It is obviously deliberately vaguely written, but we think the reference to the Glasgow pledge means they should triple that pledge,” Gaia Larsen, director for climate finance access at the World Resources Institute (WRI), tells Carbon Brief.
2. The new target is looser than the previous ‘doubling’ goal for adaptation finance
The “doubling” target set at COP26 was based on adaptation finance “provided” by developed countries.
This means it exclusively comes as publicly funded grants and loans from many EU member states, the US, Japan and a handful of other nations, including finance they raise via multilateral development banks (MDBs) and funds.
The LDCs’ original proposal for the “tripling” goal was even more specific. It called for “grant-based finance”, meaning any loans would not be included.
Amid widespread cuts to aid budgets, notably in the US, developed countries have been unwilling to commit to new targets based solely on them providing public finance.
Instead, they stressed at COP30 that any new pledges should align with the “new collective quantified goal” (NCQG) to raise $300bn by 2035, which was agreed last year. This is reflected in the final decision, which says the tripling target is “in the context of” the NCQG.
Unlike the COP26 goal, the NCQG covers finance from a variety of sources, including “mobilised” private finance and voluntary contributions from wealthier developing countries.
Assuming $120bn as the 2035 objective, WRI has estimated what its composition could be, based on the looser accounting allowed under the new adaptation-finance goal.
As the chart below shows, the institute estimates that more than a quarter of the target could be met by these new sources, with the rest coming from developed-country governments.
WRI assumes that MDBs will play a “critical role” in meeting the 2035 target, amid calls for them to triple their overall finance. More MDB funding would also automatically be counted, as the new adaptation goal includes MDB funds that are attributable to developing countries, as set out in the NCQG.
The WRI analysis also assumes a big increase in the amount of private finance for adaptation that is “mobilised” by public spending, scaling up significantly to $18bn by 2035.
Traditionally, it has been difficult to raise private investment for adaptation initiatives, as they provide less return on investment than clean-energy projects.
3. The target also falls far short of developing countries’ adaptation needs
The UN Environment Programme’s (UNEP) recent “adaptation gap” report estimates that developing countries’ adaptation investment requirements – based on modelled costs – will likely hit $310bn each year by 2035.
Developing countries have self-reported even higher financial “needs” in their nationally determined contributions (NDCs) and national adaptation plans (NAPs) submitted to the UN.
When added together, UNEP concludes these needs amount to $365bn each year for developing countries between 2023 and 2035.
(According to NRDC, most of this discrepancy comes from middle-income countries reporting significantly higher needs than the UNEP-modelled costs.)
As the chart below shows, the new COP30 target would not cover more than a third of these estimated needs by 2035.
Both domestic spending and private-sector investment that is independent of developed-country involvement are expected to play a role in meeting developing countries’ adaptation needs.
Nevertheless, UNEP states that the overarching climate-finance goals set by countries are “clearly insufficient” to close the adaptation-finance “gap”.
Even in a scenario based on the LDCs’ original proposal of tripling adaptation finance to $120bn by 2030, the UNEP report concluded that a “significant” gap would have remained.
The post Analysis: Why COP30’s ‘tripling adaptation finance’ target is less ambitious than it seems appeared first on Carbon Brief.
Analysis: Why COP30’s ‘tripling adaptation finance’ target is less ambitious than it seems
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The planet is heating up more quickly than ever before.
For decades, greenhouse gas emissions caused by human activity have been building up in the atmosphere and trapping ever-higher levels of heat.
The resulting asymmetry between incoming solar energy and energy radiated back out into space – known as “Earth’s energy imbalance” – provides a direct measure of the extent to which humans are disrupting the Earth’s climate system.
This imbalance is growing and in 2025 its 10-year average reached a record high, indicating that global temperatures could increase at even higher rates in the future.
This is among the headline findings of the latest “indicators of global climate change” (IGCC) report, published in the journal Earth System Science Data, which tracks changes in the climate system on an annual basis.
The report, now in its fourth iteration, has been produced by dozens of scientists from around the world.
Its findings are designed to fill the gap between Intergovernmental Panel on Climate Change (IPCC) science reports, which are published every 5-7 years.
In this article, we unpack the IGCC report, which explores how human activity is driving a growing energy imbalance and why monitoring systems to track global climate are so crucial.
(For more on previous IGCC reports, see Carbon Brief’s coverage in 2023, 2024 and 2025.)
Greenhouse gas emissions remain at an all-time high
Global greenhouse gas emissions are continuing to increase, mostly as a result of the use of fossil fuels. However, deforestation, agriculture and industrial processes also play an important role.
Over the most recent decade (2015-24), emissions stood at the equivalent of 54.6bn tonnes of carbon dioxide equivalent (GtCO2e) per year. In 2024, the most recent year for which we have complete data, emissions reached 56.8GtCO2e.
As the chart below shows, these emissions have pushed up atmospheric levels of CO2, methane and nitrous oxide. In 2025, concentrations of these gases reached 425.6 parts per million (ppm), 1936.3 parts per billion (ppb) and 339.4ppb, respectively.
This represents a rise of 3.8%, 3.8% and 2.2%, respectively, since the 2019 levels reported in the IPCC’s sixth assessment report (AR6).
At the same time, declines in emissions of aerosols such as sulphur dioxide, partly as a result of efforts to tackle air pollution, are increasing the Earth’s energy imbalance. This is because aerosols have a cooling effect on the Earth’s climate, counteracting warming from CO2 and other greenhouse gas emissions.
(Tackling sulphur dioxide, alongside other particulate emissions, remains critical because the immediate health and environmental damage they cause far outweighs their short-term cooling effect on the climate.)
The Earth’s energy imbalance is rising rapidly
The Earth’s energy imbalance has long been recognised as a key indicator of how the climate is being affected by human activities.
However, it is only in the last few decades that scientists have been able to record temperature changes deep enough in the ocean to accurately quantify it.
Earth’s energy imbalance measures how quickly excess heat is accumulating in every part of the Earth system, primarily in the ocean, but also in land, ice and atmosphere.
Through this accumulation of heat, the energy imbalance influences the rate of sea level rise and ice melt across the world, as well as increasing the frequency and intensity of extreme weather events, such as storms, floods and droughts.
Without human influence, the Earth’s energy imbalance would be close to zero.
But, as greenhouse gas emissions have built up in the atmosphere, the imbalance has been growing since the 1970s. Recent increases to Earth’s energy imbalance have outpaced those projections made by climate models — indicating the planet could see more warming than expected in the future.
As the right-hand chart below shows, the imbalance is now at a record high, having more than doubled over the past two decades.
It has increased by around 40% since 2019, from an average 0.79 watts per square metre (Wm2) over 2006-18, according to IPCC AR6, to 1.12Wm2 over 2013-25.
The left-hand chart shows how heat is accumulating in the ocean (blues), ice (grey), land (orange) and atmosphere (purple).
Global temperature rise
The excess heat building up in the climate system from the energy imbalance is pushing up global temperatures at a record rate of 0.27C per decade.
We estimate that human-induced warming – the amount of observed global surface
temperature increase attributable to both the direct and indirect effects of human activities – reached 1.37C in 2025. This has risen from 1.0C in 2017, as reported in IPCC AR6.
While natural variability in the climate system – such as El Niño or La Niña events – can also influence temperatures year-to-year, the upward temperature trend we are seeing is being driven by the persistent imbalance in energy.
We now expect global temperatures to exceed the Paris Agreement limit of 1.5C above pre-industrial levels around the year 2030.
This is significant because 1.5C has been identified as the critical dividing line between manageable climate risks and catastrophic, potentially irreversible damage to global ecosystems and human societies.
Heat accumulating throughout the Earth system
While heat is accumulating throughout the Earth system, it is not being distributed evenly around the globe.
Since the 1970s, around 90% of this heat has been taken up by the ocean, affecting marine ecosystems, ocean circulation patterns, sea level rise and climate extremes.
For example, the number of marine heatwave days – periods of unusually high sea surface temperatures – has more than tripled globally since the early 1990s. The year 2025 alone saw 65 days of marine heatwaves – meaning they occurred, on average, more than one day a week.
Meanwhile, the cryosphere – the portion of the Earth made up of frozen water, including glaciers, ice sheets and permafrost – is experiencing widespread ice loss and thawing in response to the growing energy imbalance. This affects ecosystems, sea level rise and infrastructure in polar and high-latitude regions.
Rapid warming has also resulted in record extreme temperatures over land, with average maximum temperatures for any single day over 2016-25 around 1.92C above pre-industrial levels). This is an increase of almost half a degree compared to the previous decade (2006-15).
Sea level rise and the energy imbalance
Sea level rise provides one of the clearest long-term signals of a changing planet.
It is closely linked to Earth’s energy imbalance. As heat accumulates in the ocean, water expands, raising sea levels. Meanwhile, a warming land and atmosphere means addition of water to the oceans through melting of glaciers and ice sheets, also adding to sea level rise.
Over the long-term, sea levels have been rising, on average, at a rate of around 1.8mm per year since 1901, totalling a record 23cm in 2025. This is increasing the risk of coastal flooding, erosion and habitat loss in many low-lying areas around the world.
This rise can be seen in the left-hand chart below, which shows observed global sea level changes from tide gauges (grey and blue dashed lines) and satellites (red dashed lines) since 1901. The solid lines indicate the average across multiple datasets.
Sea level rise is accelerating consistent with the observed increase in Earth’s energy imbalance. Over 2006-25, sea levels have risen at a rate of 3.67mm per year – more than double the rate of 1.69mm per year seen over 1976-95.
This increasing rate is shown in the right-hand figure below, which shows four successive overlapping 20-year periods and the most-recent decade.
(Last year’s transition from El Niño to weak La Niña conditions affected global rainfall patterns and led to a small and temporary fall in global average sea level in 2025. This explains the slight decrease in rate of sea level rise for the most recent decade, which is affected more than the 20-year period 2006-25.)
The bigger picture
Despite greenhouse gas emissions not increasing as rapidly as in the 2000s, this year’s IGCC findings continue to show how far and how fast the climate is changing due to human activity.
A significant increase in decarbonisation efforts in the second half of this decade is required to slow down the rate of human-caused warming and limit the escalation of climate risks and impacts.
These findings, like many others produced by scientists across the globe, rely on international expertise, partnership and the maintenance and availability of global climate datasets and the global observing programmes that underpin them.
This year’s edition of IGCC used more than 40 global datasets produced by research teams around the world, including the NASA satellite record of the Earth’s energy imbalance and the ARGO deep ocean float network.
However, a number of long-term monitoring programmes could be threatened by funding decisions made by governments around the world, most notably the Trump administration in the US.
Local meteorological data and weather balloon measurement programmes in many countries have declined in recent years, especially in Africa, the west Pacific and South America. This reduces scientists’ ability to monitor and understand key indicators of climate change.
This is not just an issue for climate science. Many of these observations are key to weather forecasts and systems that provide early warning for extreme weather. For example, media reports have suggested that recent reductions in weather balloon measurements in Alaska led to a lack of warnings for a recent winter storm.
The continuity and integrity of the climate observations that scientists use to understand how the climate is changing depends on effective and sustained coordination by international organisations, such as the Global Climate Observing System, the World Meteorological Organization and World Climate Research Programme.
Without this data and its coordination, future assessments will be much more difficult at a time when urgent climate action is needed.
The post Guest post: How a record-high ‘energy imbalance’ is driving global warming appeared first on Carbon Brief.
Guest post: How a record-high ‘energy imbalance’ is driving global warming
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