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An essential guide to the week’s key developments relating to climate change.
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This week
Global stocktake dominates negotiations
SLOW STOCKTAKE: The second week of COP28 starts today, as technical negotiations give way to ministerial talks to iron out politically-sensitive disagreements. That is the theory, at least. In reality, the centrepiece of the summit – the first “global stocktake” of progress towards the Paris Agreement goals – is progressing slowly, the Hindustan Times reported.
TRICKIEST TOPICS: In a Friday morning plenary, COP28 president Sultan Al Jaber said technical discussions would continue, alongside work led by ministerial pairs on the trickiest topics. This includes the stocktake and language on fossil fuels, see below – but also adaptation, mitigation and “means of implementation” (access to finance and technology).
TEXT TRACKER: Carbon Brief’s text tracker has the status of every agenda item at COP28. Most week-one talks handed a draft text over to week two. The stocktake text was unfinished and came with a “compilation” of further views – watch for a new draft later today. No text was agreed on adaptation – and several other agenda items were deferred, without agreement, until talks in Bonn in June 2024, the Earth Negotiations Bulletin reported.
Flurry of fossil-fuel pledges
COAL GOALS: Earlier on in the week saw an avalanche of new fossil-fuel pledges. Nine new countries signed up to the Powering Past Coal Alliance, a large group of nations pledging to phase out “unabated” coal power first founded at COP26 in Glasgow. This included the US, Czech Republic, Kosovo, Cyprus, Norway, the Dominican Republic and Iceland, the Associated Press reported – and later COP28 host UAE and Malta, Edie added.
BEYOND OIL: Elsewhere, Spain, Kenya and Samoa joined a much smaller group of nations pledging to phase out all fossil fuels, known as the Beyond Oil and Gas Alliance, at an event attended by Carbon Brief. Colombia turned heads by becoming the 10th country to join the fossil fuel non-proliferation treaty, the Guardian reported.
INDUSTRY CHARTER: In addition, COP28 host UAE and Saudi Arabia launched an “oil and gas decarbonisation charter” signed by 50 fossil-fuel companies, Arab News reported. The group, representing 40% of global production, pledged to end gas flaring by 2030, “zero-out” methane emissions and “align” with net-zero by 2050. However, scientists criticised the initiative for focusing on emissions associated with operations rather than from burning fossil fuels, which account for the majority, the Financial Times said.
Al Jaber under fire
RESURFACED REMARKS: COP28 president and oil executive Al Jaber faced renewed scrutiny this week, after remarks he made regarding the science of phasing out fossil fuels during a live online event in November resurfaced in a story by the Guardian and the Centre for Climate Reporting. On video, Al Jaber said: “There is no science out there – or no scenario out there – that says the phase-out of fossil fuels is going to achieve 1.5C.” The remark sparked fierce backlash from the scientific and political community.
REACTION: A day after the story and the resulting outcry, Al Jaber faced journalists during a highly unusual COP press conference attended by Carbon Brief. Sat at a table flanked by Intergovernmental Panel on Climate Change (IPCC) chair Prof Jim Skea, he told reporters: “We’re here because we very much believe and respect the science…Everything this presidency works on is centred around the science.”
Around the world
- RENEWABLES PLEDGE: As part of the Global Pledge on Renewables and Energy Efficiency, 118 governments pledged to triple the world’s renewable energy capacity by 2030 reported Reuters. China and India did not join, Carbon Brief noted.
- BAKU BID: Azerbaijan’s bid to host COP29 got a boost after being backed by Armenia following peace talks between the two warring nations, reported state news agency Azartac. However, Carbon Brief understands Russia has vetoed the bid.
- US FUNDS: The US had pledged $3bn for the UN’s Green Climate Fund (GCF), according to Climate Home News. This means the US has pledged more to the GCF than any other country, but the outlet noted that delivering the money will rely on the approval of Congress, which is currently controlled by Republicans.
- ADAPTATION STALLS: Down to Earth reported that developing countries at COP28 “rejected” the first draft of a new “global goal on adaptation” as it “did not reflect” their priorities – particularly around finance. Reuters noted growing concerns that focus on loss and damage could “threaten” adaptation funds.
- ‘FORESTS FOREVER’: Brazil unveiled a new “tropical forests forever” fund proposal on Friday, Reuters reported. Meanwhile, France confirmed new forest funding for Papua New Guinea, the Democratic Republic of Congo and the Republic of Congo, Dubai’s Khaleej Times reported.
- INDIGENOUS ACHIEVEMENT: Brazil’s Indigenous minister Sônia Guajajara made history this week by becoming the first Indigenous head of delegation at a climate COP, Carbon Brief reported.
15
The number of female heads of state attending COP28 out of a total of 133, according to the NGO CARE International. Just 38% of COP delegates are female.
Latest climate research
- The annual Global Carbon Budget, published in Earth System Science Data and covered by Carbon Brief, found that global fossil-fuel emissions will once more reach record highs in 2023 – a projected 1.1% increase from 2022 levels.
- The World Meteorological Organization’s decadal climate report said that 2011-20 was a “decade of accelerating climate change” and laid out the “concrete connections” between extreme weather events and slower progress towards ending poverty.
- The Global Tipping Points report stated that the world is “already at risk of crossing” five tipping points in the Earth system, including both the Greenland and west Antarctic ice sheets and warm-water coral reefs.
(For more, see Carbon Brief’s in-depth daily summaries of the top climate news stories on Monday, Tuesday, Wednesday, Thursday and Friday.)
Captured

During a speech on Wednesday night, Al Jaber urged negotiators to “maintain momentum and achieve a punctual finish” to COP28. The talks are scheduled to end on Tuesday 12 December and Al Jaber said he intends to close them by “11am at the latest”. But seasoned COP goers like Al Jaber will know that COPs rarely finish on time. In fact, analysis by Carbon Brief’s Joe Goodman shows that eight of the last 10 climate summits have run over by more than 24 hours, with COP27 being the second-longest summit to date. The last COP to finish near-enough on time was COP12 in Nairobi in 2006.
Spotlight
The fight over fossil fuels
Negotiations at COP28 have entered their crucial second week and the fight over what to say about fossil fuels in the “global stocktake” text is moving out into the open.
Ahead of the talks, 106 countries including the EU and the 79-member Organisation of African Caribbean and Pacific States backed language on a “global phase-out of unabated fossil fuels”. A separate group of 26 countries called for “a global phase-out of fossil fuels”.
While the scientific evidence is clear on the need for swift and significant cuts in fossil-fuel use if warming is to stay below 1.5C, the wording being discussed at COP28 is anything but.
As Carbon Brief’s in-depth Q&A explained on Wednesday, many of the words and phrases being put forward are contentious or are ambiguous. There is currently no agreed definition for what constitutes “abated” or “unabated” fossil fuels. Some disagree that phase “out” means getting to zero, while phase “down” is also imprecise.
The latest draft of the global stocktake text “calls upon” countries to work “towards” one of five options:
- “A phase-out of fossil fuels in line with best available science”.
- Option one plus alignment to “the IPCC’s 1.5C pathways” and Paris principles.
- “A phase-out of unabated fossil fuels…a peak in their consumption this decade” and an “energy sector…predominantly free of fossil fuels well ahead of 2050”.
- “Phasing out unabated fossil fuels and to rapidly reducing their use so as to achieve net-zero CO2 in energy systems by or around mid-century”.
- “No text.” (China, India and the Arab Group currently oppose the inclusion of any fossil-fuel language.)
Carbon Brief understands that parties began floating alternative language on fossil fuels on the first day of COP28. New formulations are still emerging, with elements such as timelines, differentiated targets or wording that avoids “phase-out” or “phase-down” altogether.
The list below shows options posited by countries and international alliances so far:
- UAE in May: “Phasing out of fossil fuel emissions.” This implies ongoing fossil fuel use, with carbon capture and storage (CCS) theoretically avoiding emissions.
- UAE in October: To “work towards a future energy system that is free of unabated fossil fuels by mid-century including by scaling…all available solutions and technologies”. This centres on unabated fossil fuels, again implying a role for “technologies” such as CCS. It adds the vague “work towards”.
- UAE with the International Energy Agency in December:
- “A huge increase in energy efficiency and of renewables this decade must come alongside and support a significant phase-down in fossil fuel supply and demand”. This links supply and demand cuts to the scaling up of alternatives.
- “Renewable capacity must be trebled by 2030 to increasingly substitute…for fossil fuels”. This mentions the idea of “substitution” of fossil fuel demand.
- “Fossil fuels must phase down significantly this decade to keep 1.5C within reach”. This uses the weaker “phase down” but adds urgency with “significantly”, “this decade” and a direct link to the 1.5C limit.
- US-China Sunnylands statement: To “sufficiently accelerate renewable energy…through 2030…so as to accelerate the substitution for coal, oil and gas generation…[giving] meaningful absolute power sector emission reduction, in this critical decade of the 2020s”. This centres substitution and action this decade, but only addresses the power sector.
- EU in October: A “global phase-out of unabated fossil fuels and a peak in their consumption…this decade”, aiming for an “energy sector…predominantly free of fossil fuels well ahead of 2050”. This adds timing, while the latter sentence avoids “phase-out” and “unabated”, but adds ambiguity with “predominantly”, which could mean almost all or more than half.
- High-level committee at COP28: The “phase-out of unabated fossil fuels, in particular coal…with developed countries taking the lead”. This adds differentiation and spotlights coal.
- Alliance of Latin America and the Caribbean (AILAC) on 6 December: A “just and equitable phase-out of fossil fuels in the context of a just transition, with developed countries taking the lead” and with renewables “strategically implemented…to displace fossil fuel[s]”. This centres equity and substitution.
- Alliance of Small Island States (AOSIS) on 8 December: A “phasing out of fossil fuels in line with 1.5C, the best available science, and principles and provisions of the Paris Agreement”, as well as “no new investments in fossil fuel infrastructure”. This gives definition via the science, links to 1.5C and adds an additional marker on ending fossil fuel investments.
- World Climate Research Programme scientists: “[M]oving towards the phase-out of fossil fuel combustion is necessary to keep the 1.5C goal…within reach.” This has the rider “towards”, but puts the focus on fossil fuel “combustion” and links to 1.5C.
- Group of 800+ leaders from business, civil society, politics and academia: “An orderly phase-out of all fossil fuels in a just and equitable way, in line with a 1.5C trajectory.”
If COP28 is to agree language on fossil fuels, it is likely to include several of these elements around timing, pace, differentiation and equity – as well as additional adverbs and adjectives. It may also tie fossil-fuel cuts to access to finance and technology.
Carbon Brief’s text tracker and deputy editor Dr Simon Evans’ Twitter account will continue to bring updates on the latest drafts for the global stocktake and other areas.
The search for agreed language is a key test for the summit. If it can be found, it would send a signal about the future path of the global economy to consumers, regulators and investors.
Crucially, the stocktake also informs the next round of national climate pledges out to 2035 – or even 2040. This matters because by the time of the next global stocktake in 2028, the already-tiny carbon budget for 1.5C will have been almost completely used up.
Watch, read, listen
SURVIVAL MODE: Grist detailed the Marshall Islands’ “life-or-death” climate adaptation plan, which calls for billions in funding and says that many islanders will likely need to leave as “climate impacts worsen”.
OFFSETTING: The Financial Times looked at the “looming land grab in Africa for carbon credits” in the context of ongoing COP28 talks on the rules for a new global carbon market.
FIGUERES ON COP28: The Rest is Politics podcast, hosted by the UK Labour party’s former PR man Alastair Campbell and former Conservative minister Rory Stewart, spoke to former UN climate chief Christiana Figueres on all things COP28.
Coming up at COP28
- 9 December: The Netherlands: signing joint ministerial statement on fossil fuel subsidies
- 9 December: UNEP: Launch of the State of Finance for Nature report
- 9 December: Beyond Oil and Gas Alliance: Aligning oil and gas production with the Paris Agreement
- 9 December: 10-point plan for financing biodiversity: ministerial stocktake
- 10 December: Climate change and courts: judicial perspectives on climate litigation, Action Lab
- 11 December: Global Climate Action high-level event
- 12 December: COP28 scheduled finish date
Pick of the jobs
- Climate Policy Radar, climate justice and just transition policy officer | Salary: £40,000-£50,000. Location: London
- World Resources Institute India | programme associate – climate programme | Salary: INR800,000-900,000. Location: Surat, India
- Uplift, legal campaigns lead | Salary: £45,378-£48,141. Location: Remote in the UK
- Boston Globe, climate reporter | Salary: Unknown. Location: Boston, US
DeBriefed is edited by Daisy Dunne. Please send any tips or feedback to debriefed@carbonbrief.org
The post COP28 DeBriefed 8 December: The fight over fossil fuels; Al Jaber defends ‘respect’ for science; Has COP ever finished on time? appeared first on Carbon Brief.
Climate Change
Every country needs a model to help optimise its energy transition
Claver Gatete is Executive Secretary of the UN Economic Commission for Africa. Jason Veysey is Energy Modeling Program Director and Senior Scientist at the Stockholm Environment Institute. Lisa Sachs is Director of the Columbia Center on Sustainable Investment at Columbia University.
The case for global energy transition has rarely been clearer. The closure of the Strait of Hormuz earlier this year exposed the cost of unplanned, fossil-dependent systems, while the falling cost of renewables, the rising penetration of electric vehicles, and the growing value of demand flexibility have made the direction of travel obvious. The benefits of a clean, secure, integrated system are no longer in dispute. What remains unclear is how to build it.
Countries around the world have called for faster renewable energy deployment and alternative energy arrangements. A secure, affordable, resilient, decarbonised system requires specific investments in specific places in a specific sequence, optimised across sectors and borders. But very few governments have the analytical foundation to translate those imperatives into investment.
The two instruments that are supposed to determine investment priorities for decarbonisation – Nationally Determined Contributions (NDCs) and country platforms – cannot answer the most basic question facing any country undertaking an energy transition: what should the energy system look like?
To close this gap, every country needs a bankable, economy-wide optimisation model for its energy system. A model is not a plan, but it can help answer the critical question of what the future energy system should look like. It shows how optimal scenarios vary as assumptions and policies are adjusted, calculates investment requirements and sequencing, and quantifies how system costs are affected by assumptions, policies, and exogenous variables like trade policy and financing terms.
Tool for efficient investment
Optimisation is a simplified way of simulating an energy system, but it can be an extremely powerful tool for moving energy planning from reactive (how do we manage the disparate actions in the energy system?) to intentional (what energy system underpins our national objectives?). A model can show how optimal scenarios vary as assumptions and policies are adjusted, and how investment requirements are quantified and sequenced.
Optimisation models can treat the energy system and the sectors it serves as an integrated whole, optimising across sectors and projects in ways that can be mutually reinforcing. If considered independently, growth in industrial demand, transport electrification, and digital infrastructure can add stress to the energy system. But an optimised plan can arrange these and other changes in an efficient, synergistic way.
Two to tango: How governments can unlock private investment for national climate goals
New load can be added where low-cost power is available; industrial customers can ensure the viability of investments in energy supply; electric vehicle charging policy can smooth load curves and reduce costs for all consumers.
Additionally, optimisation modeling can also change the financeability of investments. Taken alone, each project faces uncertainty about the rest of the system, which raises the cost of capital and causes projects to stall or unwind after contracts are signed. A coherent, optimised plan makes visible the coordination that private capital would otherwise have to bet on: identified offtake, sequenced and committed transmission, contracted power supply, and so on.
What COP31 and COP32 should do
The upcoming COPs in Turkey and Ethiopia can shift the center of gravity of international climate cooperation from fragmented commitments to planning. Three moves are urgently needed.
First, optimised, economy-wide, long-term energy system planning must be the foundation on which any meaningful NDC, country platform, or finance commitment rests. NDCs are typically drafted by environment or single-line ministries, with limited cross-sectoral input from ministries of energy, finance, and planning. They contain targets, derived from sectoral strategies or national commitments, not from an analytically grounded picture of what the energy system should look like and what investments would make it work. Country platforms are generally a portfolio of investments assembled from existing project pipelines, rather than derived from a system-level analysis of what an optimised, decarbonised energy system would require.
Second, recognise regions as a key planning unit. Modern integrated energy systems are inherently regional. Renewable endowments are unevenly distributed; balancing variable supply across borders lowers aggregate cost, reduces redundant backup capacity, and unlocks economies of scale no individual nation can achieve. Many energy investments in Southeast Asia, East Africa, Southern Africa and Central Asia may only be financeable in a regional context. Assessing domestic infrastructure without regional optimisation perpetuates the perception that decarbonisation is more expensive than it is.
COP31 leaders unveil global targets, with spotlight on electrification
Third, finance the planning capacity. A coordinated commitment by multilateral development banks, bilateral donors, and philanthropic partners to help every region and its constituent countries develop and maintain their own modelling capability, with open-source tools and regional analytical hubs, would close the most consequential gap in the current architecture. The cost is small relative to current spending on country platforms, failed project preparation, and misallocated infrastructure investment.
This includes supporting regional institutions such as the ASEAN Centre for Energy, the African Energy Commission, regional power pools, and the Latin American and Caribbean Energy Organization to determine what optimised regional systems require. Country-by-country pledging, repeated at every COP, will not deliver what meaningfully integrated systems can.
The 2026 energy crisis made the cost of unplanned, fossil-dependent systems newly visible. That window of clarity will close. The international community should seize the moment to build the planning foundation that has been missing for thirty years, rather than commissioning another round of NDCs or pledges, striving for outcomes neither was designed to deliver.
The post Every country needs a model to help optimise its energy transition appeared first on Climate Home News.
Every country needs a model to help optimise its energy transition
Climate Change
Explainer: How the ‘super El Niño’ will reshape the world’s weather
The world is currently experiencing what is expected to become the strongest El Niño on record – dubbed a “super El Niño” by many.
El Niño is the warm phase of a recurring climate pattern in the tropical Pacific that releases heat from the ocean into the atmosphere.
This temporarily raises global temperatures and reshapes rainfall and extreme weather around the world – impacting the lives of billions of people.
The current El Niño event began in June and is expected to last into 2027.
El Niño is part of a wider climate pattern called the El Niño-Southern Oscillation (ENSO) cycle.
The ENSO cycle also has a cool phase, known as La Niña, as well as a “neutral” phase. El Niño and La Niña events typically last between nine and 12 months, but can go on longer.
Below, Carbon Brief explains how the ENSO cycle works, its impacts on extreme weather and global temperatures and why this El Niño event is projected to be the most intense since records began.
The post Explainer: How the ‘super El Niño’ will reshape the world’s weather appeared first on Carbon Brief.
https://interactive.carbonbrief.org/el-nino-explainer/index.html
Climate Change
Analysis: The two largest reservoirs in the US have hit record-low levels
The second-largest reservoir in the US reached a record-low water height on Saturday – just days after the country’s largest reservoir broke its own record.
Both Lake Mead and Lake Powell are located on the Colorado River.
They provide water for populations across seven US states in the south-western US, with around 40 million people getting some or all of their municipal water from the Colorado River.
The river also provides water for around 5.5m acres (22,258 square kilometres) of farmland across Colorado, Arizona, California and the other states in the river basin.
Experts tell Carbon Brief that climate change, population growth and over-consumption are all contributing to the current record-low levels of the reservoirs.
Record lows
At full capacity, Lakes Mead and Powell can hold a combined 68 cubic kilometres of water – enough to supply all household consumption in the contiguous US for nearly 1.5 years. However, the water level in both reservoirs has been declining for decades.
The chart below shows the water level of Lake Mead, in metres above mean sea level. The reservoir, which began to fill in 1935 following the construction of the Hoover Dam, has a “full pool” maximum capacity of 347.60 metres. The water level in Lake Mead reached a record low of 317.11 metres on 7 August.

The following chart shows the water level of Lake Powell, in metres above mean sea level. Lake Powell’s full-pool level is 1,127.76 metres.
While the reservoir reached its maximum capacity several times in the 1980s, it has not done so since. On 15 August, the water level in Lake Powell was recorded at a new record-low of 1,072.87 metres.

Both reservoirs have continued to decline in the days since breaking their respective records. The downward trend will largely continue in both lakes until next spring, when the snowpack in the mountains of the Upper Colorado River Basin begins to melt, says Dr Jack Schmidt, a senior research scientist at Utah State University’s Center for Colorado River Studies. He tells Carbon Brief:
“The big dilemma of the moment is that we’re only in the middle of August, and we have no assurance of what the coming winter will be. The only thing we can be sure of is that we will be depleting overall total basin reservoir storage from now until, roughly, early April.”
Compounding factors
The record lows across the two reservoirs are the result of several compounding factors, experts tell Carbon Brief.
Since the turn of the 20th century, the amount of water flowing along the Upper Colorado River has declined by about 20%. Research suggests that half of this decline can be attributed to human-induced climate change.
Most of the river’s streamflow comes from the snowpack of the Upper Colorado River Basin, which stretches across five western US states but is primarily located in Colorado and Utah.
This region has been gripped by a historic “megadrought” for more than a quarter of a century. Nearly half of the megadrought’s intensity over 2000-18 is attributable to climate change, according to a 2020 study.
At the same time, the increasing population in the US south-west has put added pressure on the Colorado River’s water supply. The number of people obtaining some or all of their water from the Colorado system has grown by 15 million (around 60%) since 1992.
Schmidt tells Carbon Brief:
“There’s an ultimate cause of the present water crisis, and there’s a proximate cause. The ultimate cause is a warming climate, a warming planet and a pretty clear correlation between warming conditions and decreased runoff in the Colorado River Basin.
“The proximate cause is that in this messy democratic republic of ours, big policy decisions that match the variability of the climate occur painfully slowly – with intense political negotiations – and only incrementally.”
On 31 July, the US Bureau of Reclamation, which manages water resources in the western US, released an environmental impact statement on its proposed post-2026 strategy for managing Lakes Powell and Mead. The strategy itself has not been released yet.
Schmidt notes that the statement does appear to give the Bureau flexibility to “respond to crisis” by reducing the delivery of water to several states. However, he adds:
“They acknowledge it won’t work if we just stay critically dry, and of course every climate model for the 21st century, especially with a continually warming planet, says that that’s exactly what’s going to happen.”
The post Analysis: The two largest reservoirs in the US have hit record-low levels appeared first on Carbon Brief.
Analysis: The two largest reservoirs in the US have hit record-low levels
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