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Carbon Brief handpicks and explains the most important climate and energy stories from China over the past fortnight. Subscribe for free here.
Key developments
US-China climate deal paves way for Xi-Biden meeting and COP28
SUNNYLANDS STATEMENT: Following talks between US and Chinese climate envoys John Kerry and Xie Zhenhua, the two nations released statements “to jointly tackle global warming by ramping up…renewable energy with the goal of displacing fossil fuels”, the New York Times reported. Both countries pledged to “pursue efforts to triple renewable energy capacity globally by 2030”, a key goal in COP28 negotiations, it added. The statement backed the “success of COP28”, which Reuters said was “crucial” to coming to a consensus in Dubai. However, while the statement supported a broad political outcome from the “global stocktake” at COP28, there was no agreed language on fossil fuel phaseout, noted Carbon Brief’s Simon Evans on Twitter. The BBC quoted Bernice Lee, distinguished fellow at Chatham House, as saying that it had likely “proven to be too difficult to find the form of language that works for both” on fossil fuels. Similarly, while there were commitments in the statement to hold policy dialogues on energy efficiency, doubling the rate of efficiency improvements by 2030 was not mentioned.
EMISSIONS PEAKING: The two countries “expect meaningful cuts to be made to power sector emissions before 2030”, Bloomberg reported, quoting Joanna Lewis, an expert in international policy at Georgetown University, as saying this implies “a reduction in emissions from China’s coal plants very soon”. (This aligns with recent analysis by the Centre for Research on Energy and Clean Air (CREA) for Carbon Brief, see below.) However, on Twitter, senior Politico climate correspondent Karl Mathiesen spotted a slight difference between the readouts – in the US version, power sector emissions cuts are tied to “this critical decade of the 2020s”, whereas in the Chinese readout, reductions are not linked to any date. Reductions will likely be driven in part by carbon capture, utilisation and storage (CCUS), with Chinese energy outlet BJX News reporting that “the two countries aim to promote at least five large-scale [CCUS] cooperation projects in industry and energy…by 2030 in each country”.
‘RESTARTING’ COOPERATION: Kerry and Xie’s meeting was followed by a meeting between presidents Joe Biden and Xi Jinping on the sidelines of the Asia-Pacific Economic Cooperation (APEC) summit, at which the two leaders discussed maintaining “high-level communications” and cooperating “on trade, agriculture, climate change and artificial intelligence”, Reuters said. Le Monde reported that the US and China will restart bilateral energy dialogues and establish working groups to cover key areas of concern. US treasury secretary Janet Yellen and Chinese vice premier He Lifeng also agreed to improve climate change and global debt relief cooperation in earlier talks, the South China Morning Post reported.
‘Structural decline’ in carbon emissions expected from 2024
2024 DECLINE: In analysis for Carbon Brief, Lauri Myllyvirta, lead analyst at CREA, estimated that China’s carbon emissions “could peak this year before falling into a structural decline” due to “a historic expansion of the country’s low-carbon energy sources”, reported the Guardian. Covering the analysis, Chinese energy news site IN-EN.com said rapid growth in power generation from low-carbon energy sources, a consequent decline in coal’s share of energy consumption and China’s real estate sector downturn “lays the groundwork” for declining emissions. Myllyvirta noted that solar energy saw the “most significant increases”, with 210 gigawatts (GW) of solar power set to be installed this year, the news platform Guancha reported. These record additions are “all but guaranteed to push China’s fossil-fuel electricity generation and CO2 emissions into decline in 2024”, Business Green said in its coverage. Myllyvirta spoke on state broadcaster CGTN to discuss the findings, which were also reported by CNN, Reuters, Bloomberg, Global Times and South China Morning Post.
COAL SPOILER? In a parallel piece in Foreign Policy, Myllyvirta and his co-author Byford Tsang, senior policy advisor at climate thinktank E3G, wrote under the headline: “China pledged to ‘strictly control’ coal. The opposite happened.” Yet Myllyvirta also noted in his analysis for Carbon Brief that a surge in China’s investment in manufacturing capacity for low-carbon technologies is creating an increasingly important interest group in the country, which could affect its approach to domestic and international climate politics. This is “setting the scene for a showdown between the country’s traditional [coal] and newly emerging interest groups”, Agence France-Presse noted in its coverage.
OVERSEAS FREEZE: Meanwhile, China’s two development banks did not make any new energy sector loan commitments in 2022 for “the second year in a row”, according to a new policy brief by the Boston University Global Development Policy Center. In an article for the China Global South Project, co-author Cecilia Springer wrote that this was driven by “ongoing domestic economic woes” and “heightened debt distress in borrowing nations”.
China compensates coal power plants for spare capacity
CAPACITY COMPENSATION: China will give “guaranteed payments” to coal power producers under a new coal capacity compensation mechanism effective 1 January 2024, the country’s top economic planner, the National Development and Reform Commission (NDRC), announced in a notice released on Friday, Reuters reported. It added that the “widely-anticipated” move aims to ensure the financial viability of “seldom-utilised, backup” coal power and counter challenges with the variability of renewable energy. The mechanism will allow coal power plants to recover their fixed costs through a capacity tariff set at either 30% or 50% of 330 yuan per kilowatt per year through 2025, depending on their location, reported energy news website BJX News. From 2026, provinces will raise the tariff to “no less than 50%” of the 330 yuan benchmark. A representative from the state-owned China Energy Investment Group wrote in power sector outlet Dianlian News that the policy will adjust the role of coal-fired power units in the power system from “being primarily quantity providers to becoming capacity providers”.
REFORM LAG? Economic news outlet Jiemian quoted the NDRC as saying the policy will have a “positive impact on the electricity costs for end-users in the short and long term”. However, the mechanism has major implications for market reforms, Anders Hove, a senior research fellow at Oxford Institute for Energy Studies told Carbon Brief. “The segregation of long-term contracts, spot markets and ancillary services markets already hinders the ability of market prices to convey investment signals,” he said. While the initial policy on a national electricity market design had suggested the possibility of a market-based capacity mechanism, China ultimately chose a flat capacity payment made only to coal, he added. David Fishman, a senior manager at energy consultancy the Lantau Group, posted on Twitter that it “could distort market signals, which would ordinarily force expensive or inefficient generators out of the market”. Still, Reuters quoted Fishman saying: “It adds a lot of flexibility to the grid system and should allow more intermittent generation (like wind or solar) to enter the generation mix without compromising grid stability or energy security.”
Spotlight
What does China’s new methane plan mean for its climate goals?
In November, China published its long-awaited plan to reduce methane emissions. Carbon Brief explores how effective the plan may be for the world’s largest emitter of methane.
What does the plan say?
The plan described China’s approach as to “control methane emissions in a scientific, rational and orderly manner”, with a specific focus on the energy, agriculture and waste sectors.
It included 20 “key tasks” in emissions monitoring, technological innovation, development of policy frameworks, global cooperation and other areas.
During the 15th five year plan period (2026-2030), monitoring and accounting of methane emissions will be “significantly enhanced”, it added. Methane utilisation, emissions control technologies and policy frameworks will be “effectively improved”.
Other notable pledges included that by 2030 oil and gas producers will “strive” to “gradually” eliminate flaring, and utilisation of coal mine methane will reach 6bn cubic metres annually.
(This “corresponds to about 10%” of the coal mining sector’s total methane emissions, said Lauri Myllyvirta, lead analyst at Centre for Research on Energy and Clean Air (CREA).)
Where do methane emissions come from in China?
China is responsible for 10% of all human-caused methane emissions, with two estimates in 2021 placing its annual output at 58m tonnes (Mt) and 65Mt respectively, equivalent to 1.7-1.9bn tonnes of carbon dioxide (CO2) equivalent.
Around 40% of China’s methane emissions are gas that escapes during the mining of coal, according to the Innovative Green Development Program (iGDP), a Chinese thinktank. Another 42% is from agriculture, including livestock and rice cultivation, it said.
Coal mine methane emissions are particularly challenging to detect, according to the International Energy Agency (IEA), as they are “diffuse”. It added that abandoned mines, which could contribute “almost one fifth” of global methane emissions, cannot be included in calculations as “reliable data” is often unavailable.
Climate Home reported, however, that according to Global Energy Monitor (GEM) research, “the real figure for coal mine methane is almost double what the government claims”. Shanxi province could emit as much methane from its coal mines as the rest of the world combined, according to GEM.
Why is tackling methane important?
Methane is a potent greenhouse gas, with around 30 times the warming power of carbon dioxide 100 years after it is emitted. It is responsible for around 30% of the rise in global temperatures since the industrial revolution.
Cutting methane by 30% by 2030 – the target of the global methane pledge – is the “fastest way to reduce near-term warming” and keep 1.5C “within reach”, according to a US and EU factsheet.
Will China’s plan be effective in curbing emissions?
The Environmental Defense Fund (EDF) wrote on WeChat that it believed “in the long term”, the plan will provide “a clear guiding framework” for methane reduction efforts.
It pointed to the role the plan could play in establishing a monitoring, reporting and verification (MRV) system that could underpin a carbon pricing methodology for methane.
Dr Chen Meian, program director and senior analyst at iGDP, tells Carbon Brief that some of the “sector-specific targets mentioned in the methane plan can help China to reduce methane emissions” in coalbed methane and other areas.
However, she added, it is “difficult” to set hard targets for cutting emissions by specific amounts, due to challenges in data monitoring, “[which is why] China also listed the improvement of methane emissions MRV” as a key task.
Others are less convinced. The plan is “too ambiguous”, “descriptive” and lacking in quantitative targets, Refinitiv lead carbon analyst Yan Qin told Reuters.
Ember’s methane analyst Anatoli Smirnov told Climate Home that the “only real solution to reduce methane emissions is to close coal mines”. The outlet also quoted CREA’s Myllyvirta saying there is a lack of “political will and buy-in” to curb methane in China.
“I think China is trying to be realistic in target-setting [for its] coal sector emissions,” Chen tells Carbon Brief. She adds that China “used to set ambitious targets” for coalbed methane capture and utilisation in its five-year plans, but that it repeatedly missed them.
She added that it would be important for local governments to “set their own methane plans…tailored to local conditions” and to improve data monitoring.
What does this mean for global cooperation on methane?
A week after the plan was released, the US and Chinese climate envoys John Kerry and Xie Zhenhua issued a declaration on enhancing climate cooperation, known as the “Sunnylands statement”.
It included commitments to establish a working group that will look at several areas of cooperation, including methane emissions, and to create another working group to focus on “building on” their current national methane plans.
In addition, they commit to include “actions/targets” on methane reduction in their next climate pledges under the Paris Agreement, which will also cover other non-CO2 greenhouse gases. They will host, with the UAE, a summit on non-CO2 gases at COP28.
Without the plan’s public release, Li Shuo, director of the China climate hub at the Asia Society Policy Institute told Bloomberg, there “certainly wouldn’t have been further deals”.
However, differences in the sources of the US and China’s methane emissions could hamper cooperation. Dr Teng Fei, deputy director of the Institute of Energy, Environment and Economy at Tsinghua University, told China Dialogue that the main source of EU and US methane emissions is oil and gas, compared to coal mining for China.
Tackling coal mining methane emissions is harder and more costly than oil and gas. This could be why China has not signed up to the global methane pledge, which may be easier for the EU and US to meet, Teng added.
Watch, read, listen
COAL ADDICTION: Michael Davidson, assistant professor at the University of California, San Diego, explained in Foreign Affairs how “the need for energy security, the structure of China’s climate goals and…local interests” keeps China committed to coal, even though it “makes little financial sense”.
SOLAR DEBATE: In a video interview, Wall Street Journal reporter Phred Dvorak outlined how different countries are responding to dropping prices of Chinese solar panels in an effort to protect their own manufacturers.
EV RACE: Bloomberg published a podcast looking into how China became the dominant player in the electric vehicle industry, and what this could mean for the global economy.
GREEN BRI: A symposium summarised in Environmental Politics examined how environmental governance is practised in China’s belt and road initiative (BRI), with focus areas including China’s political mechanisms to “green” the BRI and the dynamics influencing the effectiveness of BRI renewable energy projects.
SUPPLY CHAIN RISKS? The Royal United Services Institute assessed the threat of China’s “near monopoly” of rare earth production and manufacturing of “net zero technologies”, finding that risks are “currently limited by low levels of manufacturing of these technologies in the UK”.
New science
Weather and Climate Extremes
A new study estimated that “compound” extreme weather events under a high-emissions scenario may become “10 times and 14 times more likely” through the mid-21st century and end of the century respectively. The study authors used the compound event of heavy precipitation and heatwaves in China in 2020 to identify the dynamic and thermodynamic factors contributing to the such events. They defined spatially compounding events as those occurring “when multiple connected locations are concurrently affected by the same or different hazards, thus inducing an aggregated impact”.
Global Change Biology
New research investigating recent trends in blooms of microalgal “red tides” and macroalgae in China found that microalgal blooms have been decreasing in frequency since 2003, while macroalgal blooms have generally been rising since 1999. It attributed the growth of macroalgae around China over the past 30 years to “eutrophication, climate change and grazing stress”, which it said indicated “a fundamental change in coastal systems in the region”.
China Briefing is compiled by Anika Patel and edited by Wanyuan Song and Simon Evans. Please send tips and feedback to china@carbonbrief.org.
The post China Briefing 16 November: Sunnylands statement; China methane plan; Coal capacity payments appeared first on Carbon Brief.
China Briefing 16 November: Sunnylands statement; China methane plan; Coal capacity payments
Climate Change
What Is the Economic Impact of Data Centers? It’s a Secret.
N.C. Gov. Josh Stein wants state lawmakers to rethink tax breaks for data centers. The industry’s opacity makes it difficult to evaluate costs and benefits.
Tax breaks for data centers in North Carolina keep as much as $57 million each year into from state and local government coffers, state figures show, an amount that could balloon to billions of dollars if all the proposed projects are built.
Climate Change
GEF raises $3.9bn ahead of funding deadline, $1bn below previous budget
The Global Environment Facility (GEF), a multilateral fund that provides climate and nature finance to developing countries, has raised $3.9 billion from donor governments in its last pledging session ahead of a key fundraising deadline at the end of May.
The amount, which is meant to cover the fund’s activities for the next four years (July 2026-June 2030), falls significantly short of the previous four-year cycle for which the GEF managed to raise $5.3bn from governments. Since then, military and other political priorities have squeezed rich nations’ budgets for climate and development aid.
The facility said in a statement that it expects more pledges ahead of the final replenishment package, which is set for approval at the next GEF Council meeting from May 31 to June 3.
Claude Gascon, interim CEO of the GEF, said that “donor countries have risen to the challenge and made bold commitments towards a more positive future for the planet”. He added that the pledges send a message that “the world is not giving up on nature even in a time of competing priorities”.
Donors under pressure
But Brian O’Donnell, director of the environmental non-profit Campaign for Nature, said the announcement shows “an alarming trend” of donor governments cutting public finance for climate and nature.
“Wealthy nations pledged to increase international nature finance, and yet we are seeing cuts and lower contributions. Investing in nature prevents extinctions and supports livelihoods, security, health, food, clean water and climate,” he said. “Failing to safeguard nature now will result in much larger costs later.”
At COP29 in Baku, developed countries pledged to mobilise $300bn a year in public climate finance by 2035, while at UN biodiversity talks they have also pledged to raise $30bn per year by 2030. Yet several wealthy governments have announced cuts to green finance to increase defense spending, among them most recently the UK.
As for the US, despite Trump’s cuts to international climate finance, Congress approved a $150 million increase in its contribution to the GEF after what was described as the organisation’s “refocus on non-climate priorities like biodiversity, plastics and ocean ecosystems, per US Treasury guidance”.
The facility will only reveal how much each country has pledged when its assembly of 186 member countries meets in early June. The last period’s largest donors were Germany ($575 million), Japan ($451 million), and the US ($425 million).
The GEF has also gone through a change in leadership halfway through its fundraising cycle. Last December, the GEF Council asked former CEO Carlos Manuel Rodriguez to step down effective immediately and appointed Gascon as interim CEO.
Santa Marta conference: fossil fuel transition in an unstable world
New guidelines
As part of the upcoming funding cycle, the GEF has approved a set of guidelines for spending the $3.9bn raised so far, which include allocating 35% of resources for least developed countries and small island states, as well as 20% of the money going to Indigenous people and communities.
Its programs will help countries shift five key systems – nature, food, urban, energy and health – from models that drive degradation to alternatives that protect the planet and support human well-being by integrating the value of nature into production and consumption systems.
The new priorities also include a target to allocate 25% of the GEF’s budget for mobilising private funds through blended finance. This aligns with efforts by wealthy countries to increase contributions from the private sector to international climate finance.
Niels Annen, Germany’s State Secretary for Economic Cooperation and Development, said in a statement that the country’s priorities are “very well reflected” in the GEF’s new spending guidelines, including on “innovative finance for nature and people, better cooperation with the private sector, and stable resources for the most vulnerable countries”.
Aliou Mustafa, of the GEF Indigenous Peoples Advisory Group (IPAG), also welcomed the announcement, adding that “the GEF is strengthening trust and meaningful partnerships with Indigenous Peoples and local communities” by placing them at the “centre of decision-making”.
The post GEF raises $3.9bn ahead of funding deadline, $1bn below previous budget appeared first on Climate Home News.
GEF raises $3.9bn ahead of funding deadline, $1bn below previous budget
Climate Change
Marine heatwaves ‘nearly double’ the economic damage caused by tropical cyclones
Tropical cyclones that rapidly intensify when passing over marine heatwaves can become “supercharged”, increasing the likelihood of high economic losses, a new study finds.
Such storms also have higher rates of rainfall and higher maximum windspeeds, according to the research.
The study, published in Science Advances, looks at the economic damages caused by nearly 800 tropical cyclones that occurred around the world between 1981 and 2023.
It finds that rapidly intensifying tropical cyclones that pass near abnormally warm parts of the ocean produce nearly double – 93% – the economic damages as storms that do not, even when levels of coastal development are taken into account.
One researcher, who was not involved in the study, tells Carbon Brief that the new analysis is a “step forward in understanding how we can better refine our predictions of what might happen in the future” in an increasingly warm world.
As marine heatwaves are projected to become more frequent under future climate change, the authors say that the interactions between storms and these heatwaves “should be given greater consideration in future strategies for climate adaptation and climate preparedness”.
‘Rapid intensification’
Tropical cyclones are rapidly rotating storm systems that form over warm ocean waters, characterised by low pressure at their cores and sustained winds that can reach more than 120 kilometres per hour.
The term “tropical cyclones” encompasses hurricanes, cyclones and typhoons, which are named as such depending on which ocean basin they occur in.
When they make landfall, these storms can cause major damage. They accounted for six of the top 10 disasters between 1900 and 2024 in terms of economic loss, according to the insurance company Aon’s 2025 climate catastrophe insight report.
These economic losses are largely caused by high wind speeds, large amounts of rainfall and damaging storm surges.
Storms can become particularly dangerous through a process called “rapid intensification”.
Rapid intensification is when a storm strengthens considerably in a short period of time. It is defined as an increase in sustained wind speed of at least 30 knots (around 55 kilometres per hour) in a 24-hour period.
There are several factors that can lead to rapid intensification, including warm ocean temperatures, high humidity and low vertical “wind shear” – meaning that the wind speeds higher up in the atmosphere are very similar to the wind speeds near the surface.
Rapid intensification has become more common since the 1980s and is projected to become even more frequent in the future with continued warming. (Although there is uncertainty as to how climate change will impact the frequency of tropical cyclones, the increase in strength and intensification is more clear.)
Marine heatwaves are another type of extreme event that are becoming more frequent due to recent warming. Like their atmospheric counterparts, marine heatwaves are periods of abnormally high ocean temperatures.
Previous research has shown that these marine heatwaves can contribute to a cyclone undergoing rapid intensification. This is because the warm ocean water acts as a “fuel” for a storm, says Dr Hamed Moftakhari, an associate professor of civil engineering at the University of Alabama who was one of the authors of the new study. He explains:
“The entire strength of the tropical cyclone [depends on] how hot the [ocean] surface is. Marine heatwave means we have an abundance of hot water that is like a gas [petrol] station. As you move over that, it’s going to supercharge you.”
However, the authors say, there is no global assessment of how rapid intensification and marine heatwaves interact – or how they contribute to economic damages.
Using the International Best Track Archive for Climate Stewardship (IBTrACS) – a database of tropical cyclone paths and intensities – the researchers identify 1,600 storms that made landfall during the 1981-2023 period, out of a total of 3,464 events.
Of these 1,600 storms, they were able to match 789 individual, land-falling cyclones with economic loss data from the Emergency Events Database (EM-DAT) and other official sources.
Then, using the IBTrACS storm data and ocean-temperature data from the European Centre for Medium-Range Weather Forecasts, the researchers classify each cyclone by whether or not it underwent rapid intensification and if it passed near a recent marine heatwave event before making landfall.
The researchers find that there is a “modest” rise in the number of marine heatwave-influenced tropical cyclones globally since 1981, but with significant regional variations. In particular, they say, there are “clear” upward trends in the north Atlantic Ocean, the north Indian Ocean and the northern hemisphere basin of the eastern Pacific Ocean.
‘Storm characteristics’
The researchers find substantial differences in the characteristics of tropical cyclones that experience rapid intensification and those that do not, as well as between rapidly intensifying storms that occur with marine heatwaves and those that occur without them.
For example, tropical cyclones that do not experience rapid intensification have, on average, maximum wind speeds of around 40 knots (74km/hr), whereas storms that rapidly intensify have an average maximum wind speed of nearly 80 knots (148km/hr).
Of the rapidly intensifying storms, those that are influenced by marine heatwaves maintain higher wind speeds during the days leading up to landfall.
Although the wind speeds are very similar between the two groups once the storms make landfall, the pre-landfall difference still has an impact on a storm’s destructiveness, says Dr Soheil Radfar, a hurricane-hazard modeller at Princeton University. Radfar, who is the lead author of the new study, tells Carbon Brief:
“Hurricane damage starts days before the landfall…Four or five days before a hurricane making landfall, we expect to have high wind speeds and, because of that high wind speed, we expect to have storm surges that impact coastal communities.”
They also find that rapidly intensifying storms have higher peak rainfall than non-rapidly intensifying storms, with marine heatwave-influenced, rapidly intensifying storms exhibiting the highest average rainfall at landfall.
The charts below show the mean sustained wind speed in knots (top) and the mean rainfall in millimetres per hour (bottom) for the tropical cyclones analysed in the study in the five days leading up to and two days following a storm making landfall.
The four lines show storms that: rapidly intensified with the influence of marine heatwaves (red); those that rapidly intensified without marine heatwaves (purple); those that experienced marine heatwaves, but did not rapidly intensify (orange); and those that neither rapidly intensified nor experienced a marine heatwave (blue).

Dr Daneeja Mawren, an ocean and climate consultant at the Mauritius-based Mascarene Environmental Consulting who was not involved in the study, tells Carbon Brief that the new study “helps clarify how marine heatwaves amplify storm characteristics”, such as stronger winds and heavier rainfall. She notes that this “has not been done on a global scale before”.
However, Mawren adds that other factors not considered in the analysis can “make a huge difference” in the rapid intensification of tropical cyclones, including subsurface marine heatwaves and eddies – circular, spinning ocean currents that can trap warm water.
Dr Jonathan Lin, an atmospheric scientist at Cornell University who was also not involved in the study, tells Carbon Brief that, while the intensification found by the study “makes physical sense”, it is inherently limited by the relatively small number of storms that occur. He adds:
“There’s not that many storms, to tease out the physical mechanisms and observational data. So being able to reproduce this kind of work in a physical model would be really important.”
Economic costs
Storm intensity is not the only factor that determines how destructive a given cyclone can be – the economic damages also depend strongly on the population density and the amount of infrastructure development where a storm hits. The study explains:
“A high storm surge in a sparsely populated area may cause less economic damage than a smaller surge in a densely populated, economically important region.”
To account for the differences in development, the researchers use a type of data called “built-up volume”, from the Global Human Settlement Layer. Built-up volume is a quantity derived from satellite data and other high-resolution imagery that combines measurements of building area and average building height in a given area. This can be used as a proxy for the level of development, the authors explain.
By comparing different cyclones that impacted areas with similar built-up volumes, the researchers can analyse how rapid intensification and marine heatwaves contribute to the overall economic damages of a storm.
They find that, even when controlling for levels of coastal development, storms that pass through a marine heatwave during their rapid intensification cause 93% higher economic damages than storms that do not.
They identify 71 marine heatwave-influenced storms that cause more than $1bn (inflation-adjusted across the dataset) in damages, compared to 45 storms that cause those levels of damage without the influence of marine heatwaves.
This quantification of the cyclones’ economic impact is one of the study’s most “important contributions”, says Mawren.
The authors also note that the continued development in coastal regions may increase the likelihood of tropical cyclone damages over time.
Towards forecasting
The study notes that the increased damages caused by marine heatwave-influenced tropical cyclones, along with the projected increases in marine heatwaves, means such storms “should be given greater consideration” in planning for future climate change.
For Radfar and Moftakhari, the new study emphasises the importance of understanding the interactions between extreme events, such as tropical cyclones and marine heatwaves.
Moftakhari notes that extreme events in the future are expected to become both more intense and more complex. This becomes a problem for climate resilience because “we basically design in the future based on what we’ve observed in the past”, he says. This may lead to underestimating potential hazards, he adds.
Mawren agrees, telling Carbon Brief that, in order to “fully capture the intensification potential”, future forecasts and risk assessments must account for marine heatwaves and other ocean phenomena, such as subsurface heat.
Lin adds that the actions needed to reduce storm damages “take on the order of decades to do right”. He tells Carbon Brief:
“All these [planning] decisions have to come by understanding the future uncertainty and so this research is a step forward in understanding how we can better refine our predictions of what might happen in the future.”
The post Marine heatwaves ‘nearly double’ the economic damage caused by tropical cyclones appeared first on Carbon Brief.
Marine heatwaves ‘nearly double’ the economic damage caused by tropical cyclones
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