国际能源署(IEA)在一份报告中称,热泵的普及可以加快中国高碳排的建筑和轻工业在用暖过程中的脱碳。

这份与清华大学合作发布的报告认为,由于使用热泵可以提高电气化程度并改善能效,因此如果把使用热泵作为中国实现2060年碳中和战略的一部分,为建筑供暖而产生的直接碳排放量到2025年将下降75%,降至7000万吨二氧化碳(MtCO2)。
同样,使用热泵也有助于减少为轻工业生产提供热量而产生二氧化碳排放。这可以将直接排放量从目前的1.1亿吨二氧化碳,减少到2050年的1000万吨二氧化碳以下。
2023年,中国是少数几个热泵总销量上升的国家之一。然而,报告指出,热泵的普及和建筑、轻工业向使用更多低碳能源的转型仍需要更多政策支持。
中国在供热方面消耗了多少能源?
2022年,中国的终端能源消费量为107艾焦(EJ)。国际能源署报告称,这其中热力消费量约为50艾焦。中国热力消费量相当于全球热力消费总量的“约三分之一”。
中国约四分之一的热力用于建筑业,其余用于工业。
在建筑领域,过去十年中国的热力消费增长速度超过任何其他国家,在2022年达到12艾焦。这主要是由于空间和水的用热需求不断增长,自2000年以来,直接和间接排放量增加了“近三倍”。
自2010年以来,用于供热的煤炭消费量总体下降了15%。国际能源署的报告将此归功于2010年代中期开始的政策推动。这些政策最初是“为了改善空气质量,后来是为了扩大清洁低碳能源的供暖”。
然而,区域供热——即集中供热机制——是一个例外。它是中国北方城市地区的主要热源。热泵和其他分散式解决方案在中国南方和北方农村地区更为常见。
中国北方的区域供热网络80%以上的热量生产来自煤炭。据国际能源署称,这是全国建筑供热中煤炭消耗的主要驱动因素。
2019年的一项研究发现,中国仅区域供热的碳排放量就超过了英国的二氧化碳排放总量。
该报告的主要作者基亚拉·德尔马斯特罗(Chiara Delmastro)博士和拉斐尔·马丁内斯·戈登(Rafael Martinez Gordon)博士告诉Carbon Brief:“(这)主要是由于中国北方城市(供热)网络扩张的推动,特别是……自2010年以来,区域供热网络的长度增加了250%,其中绝大部分在北方。”
不过,德尔马斯特罗和马丁内斯·戈登也指出,“中国近年来已经采取行动,朝着更清洁、更高效的供暖方向发展”——例如,从使用燃煤锅炉向更高效的热电联产电厂转型。

同时,2022年的工业用热总量为38艾焦。其中部分需求为中低温热力(低于200°C),这通常是轻工业、纸浆和造纸行业,以及一些化工行业工序所需的。
报告称,2022年这些中低温热力的需求量为4.7艾焦,直接碳排放量超过1.1亿吨二氧化碳,它可以通过现有最先进的热泵技术轻松满足。
然而,超过80%的工业供热需求需要200°C以上温度,这样的高温主要用于钢铁制造。其他需要如此高温的行业包括非金属矿物和有色金属,以及化工和石化、纸浆和造纸行业的一些流程。这些行业是工业供热需求的大用户,在2022年的消费量为33艾焦。
热泵如何帮助中国实现“双碳”目标?
中国建筑业和工业的供热需求主要由煤炭驱动,占中国煤炭消费量和二氧化碳排放量的40%。
不过,国际能源署也指出,煤炭供热量已略有减少,这主要归功于“改善空气质量、减少二氧化碳排放和最大限度提高能效的政策”。
2022年,在中国建筑的直接排放中,空间和水用热产生的碳排放量占绝大多数,约为2.9亿吨二氧化碳,而轻工业用热产生的直接排放总量为1.1亿吨二氧化碳。据国际能源署预计,中国2022年碳排放总量达到121.35亿吨二氧化碳。
该报告提供了在已宣布承诺情景(APS)下中国热泵使用量的估算。在该情景下,政府被假定会按时、全面地实现其所有气候目标。
报告还考察了既定政策情景(STEPS)下的热泵使用量情况,其反映了国际能源署自己对政府政策当前走向的判断。
如果中国坚持其“双碳”承诺、与已宣布承诺情景保持一致,那么国际能源署预计到2050年,建筑业热泵的装机容量将增至1400吉瓦(GW),可满足中国在该行业四分之一的用热需求。
根据已宣布承诺情景,到2050年,中国建筑行业每年将安装100吉瓦的热泵,相当于“美国、中国和欧盟在2022年部署的总容量”。
到2050年,建筑供热的排放量将从2.9亿吨二氧化碳降至8000万吨,减少2.1亿吨,其中热泵的贡献占到了30%。建筑业脱碳的其他驱动力还包括更多地采用电气化、能效措施和行为改变。
在轻工业方面,根据已宣布承诺情景,在2025至2050年间,中国每年将新增热泵装机容量约1.5吉瓦,可以在2050年满足五分之一的用热需求。
这将有助于“大幅”减少碳排放,其总量将从逾1.1亿吨二氧化碳锐减95%至1000万吨。电气化(包括通过采用热泵)将贡献减排量的70%。

报告还指出,有两个高耗能行业非常适合使用热泵:其一是纸浆和造纸行业,其目前约55%的用热需求可由工业热泵提供;其二是化工行业,该行业约18%的需求可由工业热泵提供。
然而,热泵不太可能满足其他高耗能行业的需求,因为“目前只有少数能满足200摄氏度以上温度的早期原型机,所有这些都远未为大众市场做好准备”。
即使在既定政策情景下,中国建筑行业中的热泵存量也将翻一番,到2050年将超过1100吉瓦,并推动建筑业排放量减少25%以上,煤改气等燃料转换措施也将发挥作用。
对于轻工业而言,在既定政策情景下,由热泵推动的碳减排 “仍然有限”,因为在当前的政策背景下,热泵的“部署可能比较缓慢”。总体而言,到2050年,与热力相关的排放量只会减少15%。
报告称,重要的是,在已宣布承诺情景下,中国和世界其他国家为实现气候目标所需的政策将“极大地调动”某些行业的积极性。采矿和机械等行业需要扩张,提高清洁能源技术产量,以满足国内和全球需求。
虽然与既定政策情景相比,这些新增工业活动将使已宣布承诺情景下中国的用热需求增加5%,但更广泛地应用电气化和清洁供热技术所节省的能源将足以抵消相关排放量。
此外,报告还指出,热泵的部署将使到2050年供热的能源强度(即单位热量的能源需求)比现在下降20%。
报告还补充称,随着更多可再生能源和核能发电并网,到2030年,热泵使用的扩张与电力系统去碳化之间的配合将使供热用电的间接排放量下降40%以上。到2050年,电力在供热中的份额可能超过75%。
例如,国际能源署指出,如果中国的气候目标得以实现,纸浆和造纸行业“到2050年将几乎完全淘汰”煤炭使用。由于电气化和煤改气,该行业已将煤炭在其能源需求中所占比例从2010年的43%减少到2022年的10%。
根据已宣布承诺情景,到2030年,中国用于空间和水供热的直接煤炭使用量将下降75%,到2040年将“几乎完全淘汰”,到2050年,热泵将成为城乡供热的关键技术。
然而,在这种情景下,需要大量投资才能部署足够的热泵来满足需求。
热泵在中国的应用效果如何?
报告称,在2023年,中国建筑业热泵装机容量超过250吉瓦,该国热泵销量占全球的25%以上,是2023年唯一热泵销量出现增长的主要市场。2022年,热泵占中国建筑业供热设备销售总量的8%。
在华中和华南部分地区,在没有集中区域供暖的情况下,热泵已成为建筑空间供暖和制冷的“常态”。报告补充说,由于当局通过政策支持鼓励农村地区限制煤炭消费,农村地区正在越来越多地采用热泵。
区域供热的情况也是如此,集中供暖管网运营商们正在越来越多地安装热泵。虽然大多数是在相对较低温度下运行的“空气源”热泵,但一些运营商也开始安装大型热泵,以回收钢铁厂、污水处理设施和煤化工工厂的废热。
报告称,这些热泵“为区域供热网络、建筑和工业提供了热力脱碳最有效的选择之一”。
目前中国单个热泵每年的碳排放量——无论是直接排放还是间接排放——都比燃气锅炉低30%以上。报告称:“从化石燃料锅炉转向热泵将减少几乎所有安装场所的二氧化碳排放”。
国际能源机构称,尽管热泵的前期安装成本较高,但它能帮助用户在使用期内节省能源开支。
下图显示了中国不同的气候带。在一些气候寒冷以及夏热冬冷的地区,空气能热泵比燃气锅炉和电加热器更具成本效益。

空气-水热泵比电取暖器更省钱,尽管在电价比天然气更有竞争力的地区,它们只比燃气锅炉便宜。
在高耗能行业中使用热泵的可行性较低,因为目前产生200°C以上高温的技术基本上仍在开发阶段。
但报告指出,对轻工业而言,工业热泵比燃气锅炉和电锅炉“便宜得多”,并且由于高能效,在其使用寿命内成本几乎可以与燃煤锅炉相媲美。
尽管如此,由于前期安装成本高昂以及公众对热泵的有效性缺乏认识,热泵的使用并不普遍。
德尔马斯特罗和马丁内斯·戈登告诉Carbon Brief:“在某些流程中,(热泵)的替代技术可能成本更低且更合适,而且不同的政策决定可能会刺激热泵应用的广泛性。但为了实现中国的碳中和目标,我们估计到2050年,热泵需至少满足轻工业20%的热力需求。”
该报告补充说,最先进的热泵——新发布或即将发布的热泵技术——能够很好地满足建筑领域和轻工业领域的用热需求,理论上可满足约40%的需求。
此外,中国目前浪费的热能资源可以通过热泵进行再利用。报告称,2021年,中国的核电站、其他发电厂、工业活动、数据中心和废水等来源产生了45艾焦的废热资源,几乎相当于建筑和工业用热需求总和。
政策如何支持热泵的应用?
作为能源转型的一个方面,热泵在中国国家级能源和气候政策中出现的频率“日益增加”。例如,《“十四五”现代能源体系规划》(2021-2025)要求提升终端用能低碳化电气化水平。
然而,德尔马斯特罗和马丁内斯·戈登解释说,国际能源署报告中更有针对性和实用的政策建议“应该(被纳入)一个明确的供热脱碳国家行动计划中,而这正是中国目前所缺乏的”。
该计划将使中国能够为热泵的使用设定量化目标,向市场发出明确信号,并促进对研发、制造和部署的更广泛投资。

与此同时,报告还建议:对新建建筑提出更严格的性能要求、制定更严格的能效基准、在建筑规范中纳入热泵安装要求,以及将国家碳排放权交易体系范围扩大到工业领域,这些都可以推动热泵的应用。
报告补充称,贷款、税收抵免和其他财政支持机制可以解决消费者不愿支付高昂的前期安装费用的问题。
北方城市天津为购买空气源热泵的用户提供了2.5万元(3700美元)的补贴,但这种做法(尤其在城市地区)并不普遍。
报告说,提高人们对工业热泵益处的认识并降低工业用电成本,可加快轻工业对热泵的采用。
电价激励措施已促使农村居民区从煤炭供暖转变为天然气供暖。根据国际能源署的计算,在北京的农村地区,类似的电价激励措施以及对安装热泵的补贴意味着热泵已成为当地家庭最便宜的取暖选择。
报告指出,在全国范围内推广这一政策可以“进一步提高热泵在目前电价明显高于天然气的地区的竞争力”。
其他可使热泵对消费者更具吸引力的措施包括,将热泵与太阳能电池板或太阳能光热解决方案相结合,以及调整电力系统以提供阶梯电价和分时电力市场措施。
最后,报告称,更多地回收废弃能源并结合热能储存技术,可以“通过将多余电力……转化为热能并储存起来供冬季供暖使用,从而优化供热”。
报告补充说,“以河北北部为例,到2050年,热泵从可再生能源和废热中回收的热力可占到冬季区域供热量的80%”。
The post 国际能源署:热泵可帮助中国减少75%为建筑供暖而产生的碳排放 appeared first on Carbon Brief.
Climate Change
The 2026 budget test: Will Australia break free from fossil fuels?
In 2026, the dangers of fossil fuel dependence have been laid bare like never before. The illegal invasion of Iran has brought pain and destruction to millions across the Middle East and triggered a global energy crisis impacting us all. Communities in the Pacific have been hit especially hard by rising fuel prices, and Australians have seen their cost-of-living woes deepen.
Such moments of crisis and upheaval can lead to positive transformation. But only when leaders act with courage and foresight.
There is no clearer statement of a government’s plans and priorities for the nation than its budget — how it plans to raise money, and what services, communities, and industries it will invest in.
As we count down the days to the 2026-27 Federal Budget, will the Albanese Government deliver a budget for our times? One that starts breaking the shackles of fossil fuels, accelerates the shift to clean energy, protects nature, and sees us work together with other countries towards a safer future for all? Or one that doubles down on coal and gas, locks in more climate chaos, and keeps us beholden to the whims of tyrants and billionaires.
Here’s what we think the moment demands, and what we’ll be looking out for when Treasurer Jim Chalmers steps up to the dispatch box on 12 May.
1. Stop fuelling the fire
2. Make big polluters pay
3. Support everyone to be part of the solution
4. Build the industries of the future
5. Build community resilience
6. Be a better neighbour
7. Protect nature
1. Stop fuelling the fire

In mid-April, Pacific governments and civil society met to redouble their efforts towards a Fossil Fuel Free Pacific. Moving beyond coal, oil and gas is fundamental to limiting warming to 1.5°C — a survival line for vulnerable communities and ecosystems. And as our Head of Pacific, Shiva Gounden, explained, it is “also a path of liberation that frees us from expensive, extractive and polluting fossil fuel imports and uplifts our communities”.
Pacific countries are at the forefront of growing global momentum towards a just transition away from fossil fuels, and it is way past time for Australia to get with the program. It is no longer a question of whether fossil fuel extraction will end, but whether that end will be appropriately managed and see communities supported through the transition, or whether it will be chaotic and disruptive.
So will this budget support the transition away from fossil fuels, or will it continue to prop up coal and gas?
When it comes to sensible moves the government can make right now, one stands out as a genuine low hanging fruit. Mining companies get a full rebate of the excise (or tax) that the rest of us pay on diesel fuel. This lowers their operating costs and acts as a large, ongoing subsidy on fossil fuel production — to the tune of $11 billion a year!
Greenpeace has long called for coal and gas companies to be removed from this outdated scheme, and for the billions in savings to be used to support the clean energy transition and to assist communities with adapting to the impacts of climate change. Will we see the government finally make this long overdue change, or will it once again cave to the fossil fuel lobby?
2. Make big polluters pay

While our communities continue to suffer the escalating costs of climate-fuelled disasters, our Government continues to support a massive expansion of Australia’s export gas industry. Gas is a dangerous fossil fuel, with every tonne of Australian gas adding to the global heating that endangers us all.
Moreover, companies like Santos and Woodside pay very little tax for the privilege of digging up and selling Australians’ natural endowment of fossil gas. Remarkably, the Government currently raises more tax from beer than from the Petroleum Resource Rent Tax (PRRT) — the main tax on gas profits.
Momentum has been building to replace or supplement the PRRT with a 25% tax on gas exports. This could raise up to $17 billion a year — funds that, like savings from removing the diesel tax rebate for coal and gas companies, could be spent on supporting the clean energy transition and assisting communities with adapting to worsening fires, floods, heatwaves and other impacts of climate change.
As politicians arrive in Canberra for budget week, they will be confronted by billboards calling for a fair tax on gas exports. The push now has the support of dozens of organisations and a growing number of politicians. Let’s hope the Treasurer seizes this rare window for reform.
3. Support everyone to be part of the solution
As the price of petrol and diesel rises, electric vehicles (EVs) are helping people cut fuel use and save money. However, while EV sales have jumped since the invasion of Iran sent fuel prices rising, they still only make up a fraction of total new car sales. This budget should help more Australians switch to electric vehicles and, even more importantly, enable more Australians to get around by bike, on foot, and on public transport. This means maintaining the EV discount, investing in public and active transport, and removing tax breaks for fuel-hungry utes and vans.
Millions of Australians already enjoy the cost-saving benefits of rooftop solar, batteries, and getting off gas. This budget should enable more households, and in particular those on lower incomes, to access these benefits. This means maintaining the Cheaper Home Batteries Program, and building on the Household Energy Upgrades Fund.
4. Build the industries of the future

If we’re to transition away from fossil fuels, we need to be building the clean industries of the future.
No state is more pivotal to Australia’s energy and industrial transformation than Western Australia. The state has unrivaled potential for renewable energy development and for replacing fossil fuel exports with clean exports like green iron. Such industries offer Western Australia the promise of a vibrant economic future, and for Australia to play an outsized positive role in the world’s efforts to reduce emissions.
However, realising this potential will require focussed support from the Federal Government. Among other measures, Greenpeace has recommended establishing the Australasian Green Iron Corporation as a joint venture between the Australian and Western Australian governments, a key trading partner, a major iron ore miner and steel makers. This would unite these central players around the complex task of building a large-scale green iron industry, and unleash Western Australia’s potential as a green industrial powerhouse.
5. Build community resilience
Believe it or not, our Government continues to spend far more on subsidising fossil fuel production — and on clearing up after climate-fuelled disasters — than it does on helping communities and industries reduce disaster costs through practical, proven methods for building their resilience.
Last year, the Government estimated that the cost of recovery from disasters like the devastating 2022 east coast floods on 2019-20 fires will rise to $13.5 billion. For contrast, the Government’s Disaster Ready Fund – the main national source of funding for disaster resilience – invests just $200 million a year in grants to support disaster preparedness and resilience building. This is despite the Government’s own National Emergency Management Agency (NEMA) estimating that for every dollar spent on disaster risk reduction, there is a $9.60 return on investment.
By redirecting funds currently spent on subsidising fossil fuel production, the Government can both stop incentivising climate destruction in the first place, and ensure that Australian communities and industries are better protected from worsening climate extremes.
No communities have more to lose from climate damage, or carry more knowledge of practical solutions, than Aboriginal and Torres Strait Islander peoples. The budget should include a dedicated First Nations climate adaptation fund, ensuring First Nations communities can develop solutions on their own terms, and access the support they need with adapting to extreme heat, coastal erosion and other escalating challenges.
6. Be a better neighbour
The global response to climate change depends on the adequate flow of support from developed economies like Australia to lower income nations with shifting to clean energy, adapting to the impacts of climate change, and addressing loss and damage.
Such support is vital to building trust and cooperation, reducing global emissions, and supporting regional and global security by enabling countries to transition away from fossil fuels and build greater resilience.
Despite its central leadership role in this year’s global climate negotiations, our Government is yet to announce its contribution to international climate finance for 2025-2030. Greenpeace recommends a commitment of $11 billion for this five year period, which is aligned with the global goal under the Paris Agreement to triple international climate finance from current levels.
This new commitment should include additional funding to address loss and damage from climate change and a substantial contribution to the Pacific Resilience Facility, ensuring support is accessible to countries and communities that need it most. It should also see Australia get firmly behind the vision of a Fossil Fuel Free Pacific.
7. Protect nature

There is no safe planet without protection of the ecosystems and biodiversity that sustain us and regulate our climate.
Last year the Parliament passed important and long overdue reforms to our national environment laws to ensure better protection for our forests and other critical ecosystems. However, the Government will need to provide sufficient funding to ensure the effective implementation of these reforms.
Greenpeace has recommended $500 million over four years to establish the National Environment Agency — the body responsible for enforcing and monitoring the new laws — and a further $50 million to Environment Information Australia for providing critical information and tools.
Further resourcing will also be required to fulfil the crucial goal of fully protecting 30% of Australian land and seas by 2030. This should include $1 billion towards ending deforestation by enabling farmers and loggers to retool away from destructive practices, $2 billion a year for restoring degraded lands, $5 billion for purchasing and creating new protected areas, and $200 million for expanding domestic and international marine protected areas.
Conclusion
This is not the first time that conflict overseas has triggered an energy crisis, or that a budget has been preceded by a summer of extreme weather disasters, highlighting the urgent need to phase out fossil fuels. What’s different in 2026 is the availability of solutions. Renewable energy is now cheaper and more accessible than ever before. Global momentum is firmly behind the transition away from fossil fuels. The Albanese Government, with its overwhelming majority, has the chance to set our nation up for the future, or keep us stranded in the past. Let’s hope it makes some smart choices.
The 2026 budget test: Will Australia break free from fossil fuels?
Climate Change
What fossil fuels really cost us in a world at war
Anne Jellema is Executive Director of 350.org.
The war on Iran and Lebanon is a deeply unjust and devastating conflict, killing civilians at home, destroying lives, and at the same time sending shockwaves through the global economy. We, at 350.org, have calculated, drawing on price forecasts from the International Monetary Fund (IMF) and Goldman Sachs, just how much that volatility is costing us.
Even under the IMF’s baseline scenario – a de facto “best case” scenario with a near-term end to the war and related supply chain disruptions – oil and gas price spikes are projected to cost households and businesses globally more than $600 billion by the end of the year. Under the IMF’s “adverse scenario”, with prolonged conflict and sustained price pressures, we estimate those additional costs could exceed $1 trillion, even after accounting for reduced demand.
Which is why we urgently need a power shift. Governments are under growing pressure to respond to rising fuel and food costs and deepening energy poverty. And it’s becoming clearer to both voters and elected officials that fossil dependence is not only expensive and risky, but unnecessary.
People who can are voting with their wallets: sales of solar panels and electric vehicles are increasing sharply in many countries. But the working people who have nothing to spare, ironically, are the ones stuck with using oil and gas that is either exorbitantly expensive or simply impossible to get.
Drain on households and economies
In India, street food vendors can’t get cooking gas and in the Philippines, fishermen can’t afford to take their boats to sea. A quarter of British people say that rising energy tariffs will leave them completely unable to pay their bills. This is the moment for a global push to bring abundant and affordable clean energy to all.
In April, we released Out of Pocket, our new research report on how fossil fuels are draining households and economies. We were surprised by the scale of what we found. For decades, governments have reassured people that energy price spikes are unfortunate but unavoidable – the result of distant conflicts, market forces or geopolitical shocks beyond anyone’s control. But the numbers tell a different story.
What we are living through today is not an energy crisis. It is a fossil fuel crisis. In just the first 50 days of the Middle East conflict, soaring oil and gas prices have siphoned an estimated $158 billion–$166 billion from households and businesses worldwide. That is money extracted directly from people’s pockets and transferred, almost instantly, into fossil fuel company balance sheets. And this figure only captures the immediate impact of price spikes, not the permanent economic drain of fossil dependence. Fossil fuels don’t just cost us once, they cost us over and over again.
First, through our bills. Every time there is a war, an embargo or a supply disruption, fossil fuel prices surge. For ordinary people, this means higher costs for energy, transport and food. Many Global South countries have little or no fiscal space to buffer the shock; instead, workers and families pay the price.
Second, through our taxes. Governments around the world continue to pour vast sums of public money into fossil fuel subsidies. These are often justified as a way to protect the most vulnerable at the petrol pump or in their homes. But in reality, the benefits are overwhelmingly captured by wealthier households and corporations. The poorest 20% receive just a fraction of this support, while public finances are drained.
Third, through climate impacts. New research across more than 24,000 global locations gives a granular account of the true costs of extreme heat, sea level rise and falling agricultural yields. Using this data to update IMF modelling of the social cost of carbon, we found that fossil fuel impacts on health and livelihoods amount to over $9 trillion a year. This is the biggest subsidy of all, because these massive and mounting costs are not charged to Big Oil – they are paid for by governments and households, with the poorest shouldering the lion’s share.
Massive transfer of wealth to fossil fuel industry
Adding up direct subsidies, tax breaks and the unpaid bill for climate damages, the total transfer of wealth from the public to the fossil fuel industry amounts to $12 trillion even in a “normal” year without a global oil shock. That’s more than 50% higher than the IMF has previously estimated, and equivalent to a staggering $23 million a minute.
The fossil fuel industry has become extraordinarily adept at profiting from instability. When conflict drives up prices, companies do not lose, they gain. In the current crisis, oil producers and commodity traders are on track to secure tens of billions of dollars in additional windfall profits, even as households face rising bills and governments struggle to manage the fallout.
Fossil fuel crisis offers chance to speed up energy transition, ministers say
This growing disconnect is impossible to ignore. Investors are advised to buy into fossil fuel firms precisely because of their ability to generate profits in times of crisis. Meanwhile, ordinary people are told to tighten their belts.
In 2026, unlike during the oil shocks of the 1970s, clean energy is no longer a distant alternative. Now, even more than when gas prices spiked due to Russia’s invasion of Ukraine in 2022, renewables are often the cheapest option available. Solar and wind can be deployed quickly, at scale, and without the volatility that defines fossil fuel markets.
How to transition from dirty to clean energy
The solutions are clear. Governments must implement permanent windfall taxes on fossil fuel companies to ensure that extraordinary profits generated during crises are redirected to support households. These revenues can be used to reduce energy bills, invest in public services, and accelerate the rollout of clean energy.
Second, we must shift subsidies away from fossil fuels and towards renewable solutions, particularly those that can be deployed quickly and equitably, such as rooftop and community solar. This is not just about cutting emissions. It is about building a more stable, fair and resilient energy system.
Finally, we need binding plans to phase out fossil fuels altogether, replacing them with homegrown renewable energy that can shield economies from future shocks. Because what the current crisis has made clear is this: as long as we remain dependent on fossil fuels, we remain vulnerable – to conflict, to price volatility and to the escalating impacts of climate change.
The true price of fossil fuels is no longer hidden. It is visible in rising bills, strained public finances and communities pushed to the brink. And it is being paid, every day, by ordinary people around the world.
It’s time for the great power shift.
Full details on the methodology used for this report are available here.
The Great Power Shift is a new campaign by 350.org global campaign to pressure governments to bring down energy bills for good by ending fossil fuel dependence and investing in clean, affordable energy for all


The post What fossil fuels really cost us in a world at war appeared first on Climate Home News.
Climate Change
Traditional models still ‘outperform AI’ for extreme weather forecasts
Computer models that use artificial intelligence (AI) cannot forecast record-breaking weather as well as traditional climate models, according to a new study.
It is well established that AI climate models have surpassed traditional, physics-based climate models for some aspects of weather forecasting.
However, new research published in Science Advances finds that AI models still “underperform” in forecasting record-breaking extreme weather events.
The authors tested how well both AI and traditional weather models could simulate thousands of record-breaking hot, cold and windy events that were recorded in 2018 and 2020.
They find that AI models underestimate both the frequency and intensity of record-breaking events.
A study author tells Carbon Brief that the analysis is a “warning shot” against replacing traditional models with AI models for weather forecasting “too quickly”.
AI weather forecasts
Extreme weather events, such as floods, heatwaves and storms, drive hundreds of billions of dollars in damages every year through the destruction of cropland, impacts on infrastructure and the loss of human life.
Many governments have developed early warning systems to prepare the general public and mobilise disaster response teams for imminent extreme weather events. These systems have been shown to minimise damages and save lives.
For decades, scientists have used numerical weather prediction models to simulate the weather days, or weeks, in advance.
These models rely on a series of complex equations that reproduce processes in the atmosphere and ocean. The equations are rooted in fundamental laws of physics, based on decades of research by climate scientists. As a result, these models are referred to as “physics-based” models.
However, AI-based climate models are gaining popularity as an alternative for weather forecasting.
Instead of using physics, these models use a statistical approach. Scientists present AI models with a large batch of historical weather data, known as training data, which teaches the model to recognise patterns and make predictions.
To produce a new forecast, the AI model draws on this bank of knowledge and follows the patterns that it knows.
There are many advantages to AI weather forecasts. For example, they use less computing power than physics-based models, because they do not have to run thousands of mathematical equations.
Furthermore, many AI models have been found to perform better than traditional physics-based models at weather forecasts.
However, these models also have drawbacks.
Study author Prof Sebastian Engelke, a professor at the research institute for statistics and information science at the University of Geneva, tells Carbon Brief that AI models “depend strongly on the training data” and are “relatively constrained to the range of this dataset”.
In other words, AI models struggle to simulate brand new weather patterns, instead tending forecast events of a similar strength to those seen before. As a result, it is unclear whether AI models can simulate unprecedented, record-breaking extreme events that, by definition, have never been seen before.
Record-breaking extremes
Extreme weather events are becoming more intense and frequent as the climate warms. Record-shattering extremes – those that break existing records by large margins – are also becoming more regular.
For example, during a 2021 heatwave in north-western US and Canada, local temperature records were broken by up to 5C. According to one study, the heatwave would have been “impossible” without human-caused climate change.
The new study explores how accurately AI and physics-based models can forecast such record-breaking extremes.
First, the authors identified every heat, cold and wind event in 2018 and 2020 that broke a record previously set between 1979 and 2017. (They chose these years due to data availability.) The authors use ERA5 reanalysis data to identify these records.
This produced a large sample size of record-breaking events. For the year 2020, the authors identified around 160,000 heat, 33,000 cold and 53,000 wind records, spread across different seasons and world regions.
For their traditional, physics-based model, the authors selected the High RESolution forecast model from the Integrated Forecasting System of the European Centre for Medium-Range Weather Forecasts. This is “widely considered as the leading physics-based numerical weather prediction model”, according to the paper.
They also selected three “leading” AI weather models – the GraphCast model from Google Deepmind, Pangu-Weather developed by Huawei Cloud and the Fuxi model, developed by a team from Shanghai.
The authors then assessed how accurately each model could forecast the extremes observed in the year 2020.
Dr Zhongwei Zhang is the lead author on the study and a researcher at Karlsruhe Institute of Technology. He tells Carbon Brief that many AI weather forecast models were built for “general weather conditions”, as they use all historical weather data to train the models. Meanwhile, forecasting extremes is considered a “secondary task” by the models.
The authors explored a range of different “lead times” – in other words, how far into the future the model is forecasting. For example, a lead time of two days could mean the model uses the weather conditions at midnight on 1 January to simulate weather conditions at midnight on 3 January.
The plot below shows how accurately the models forecasted all extreme events (left) and heat extremes (right) under different lead times. This is measured using “root mean square error” – a metric of how accurate a model is, where a lower value indicates lower error and higher accuracy.
The chart on the left shows how two of the AI models (blue and green) performed better than the physics-based model (black) when forecasting all weather across the year 2020.
However, the chart on the right illustrates how the physics-based model (black) performed better than all three AI models (blue, red and green) when it came to forecasting heat extremes.

The authors note that the performance gap between AI and physics-based models is widest for lower lead times, indicating that AI models have greater difficulty making predictions in the near future.
They find similar results for cold and wind records.
In addition, the authors find that AI models generally “underpredict” temperature during heat records and “overpredict” during cold records.
The study finds that the larger the margin that the record is broken by, the less well the AI model predicts the intensity of the event.
‘Warning shot’
Study author Prof Erich Fischer is a climate scientist at ETH Zurich and a Carbon Brief contributing editor. He tells Carbon Brief that the result is “not unexpected”.
He adds that the analysis is a “warning shot” against replacing traditional models with AI models for weather forecasting “too quickly”.
The analysis, he continues, is a “warning shot” against replacing traditional models with AI models for weather forecasting “too quickly”.
AI models are likely to continue to improve, but scientists should “not yet” fully replace traditional forecasting models with AI ones, according to Fischer.
He explains that accurate forecasts are “most needed” in the runup to potential record-breaking extremes, because they are the trigger for early warning systems that help minimise damages caused by extreme weather.
Leonardo Olivetti is a PhD student at Uppsala University, who has published work on AI weather forecasting and was not involved in the study.
He tells Carbon Brief that “many other studies” have identified issues with using AI models for “extremes”, but this paper is novel for its specific focus on extremes.
Olivetti notes that AI models are already used alongside physics-based models at “some of the major weather forecasting centres around the world”. However, the study results suggest “caution against relying too heavily on these [AI] models”, he says.
Prof Martin Schultz, a professor in computational earth system science at the University of Cologne who was not involved in the study, tells Carbon Brief that the results of the analysis are “very interesting, but not too surprising”.
He adds that the study “justifies the continued use of classical numerical weather models in operational forecasts, in spite of their tremendous computational costs”.
Advances in forecasting
The field of AI weather forecasting is evolving rapidly.
Olivetti notes that the three AI models tested in the study are an “older generation” of AI models. In the last two years, newer “probabilistic” forecast models have emerged that “claim to better capture extremes”, he explains.
The three AI models used in the analysis are “deterministic”, meaning that they only simulate one possible future outcome.
In contrast, study author Engelke tells Carbon Brief that probabilistic models “create several possible future states of the weather” and are therefore more likely to capture record-breaking extremes.
Engelke says it is “important” to evaluate the newer generation of models for their ability to forecast weather extremes.
He adds that this paper has set out a “protocol” for testing the ability of AI models to predict unprecedented extreme events, which he hopes other researchers will go on to use.
The study says that another “promising direction” for future research is to develop models that combine aspects of traditional, physics-based weather forecasts with AI models.
Engelke says this approach would be “best of both worlds”, as it would combine the ability of physics-based models to simulate record-breaking weather with the computational efficiency of AI models.
Dr Kyle Hilburn, a research scientist at Colorado State University, notes that the study does not address extreme rainfall, which he says “presents challenges for both modelling and observing”. This, he says, is an “important” area for future research.
The post Traditional models still ‘outperform AI’ for extreme weather forecasts appeared first on Carbon Brief.
Traditional models still ‘outperform AI’ for extreme weather forecasts
-
Greenhouse Gases9 months ago
Guest post: Why China is still building new coal – and when it might stop
-
Climate Change9 months ago
Guest post: Why China is still building new coal – and when it might stop
-
Greenhouse Gases2 years ago嘉宾来稿:满足中国增长的用电需求 光伏加储能“比新建煤电更实惠”
-
Climate Change2 years ago
Bill Discounting Climate Change in Florida’s Energy Policy Awaits DeSantis’ Approval
-
Climate Change2 years ago嘉宾来稿:满足中国增长的用电需求 光伏加储能“比新建煤电更实惠”
-
Renewable Energy6 months agoSending Progressive Philanthropist George Soros to Prison?
-
Climate Change Videos2 years ago
The toxic gas flares fuelling Nigeria’s climate change – BBC News
-
Carbon Footprint2 years agoUS SEC’s Climate Disclosure Rules Spur Renewed Interest in Carbon Credits










