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It is well understood that human-caused climate change is causing sea levels to rise around the world.

Since 1901, global sea levels have risen by at least 20cm – accelerating from around 1mm a year for much of the 20th century to 4mm a year over 2006-18. 

Sea level rise has significant environmental and social consequences, including coastal erosion, damage to buildings and transport infrastructure, loss of livelihoods and ecosystems.

The Intergovernmental Panel on Climate Change (IPCC) has said it is “virtually certain” that sea level will continue to rise during the current century and beyond.

But what is less clear is exactly how quickly sea levels could climb over the coming decades.

This is largely due to challenges in calculating the rate at which land ice in Antarctica – the world’s largest store of frozen freshwater – could melt.

In this article, we unpack some of the reasons why projecting the speed and scale of future sea level rise is difficult.

Drivers of sea level rise

There are three principal components of sea level rise.

First, as the ocean warms, water expands. This process is known as thermal expansion, a comparatively straightforward physical process

Second, more water gets added to the oceans when the ice contained in glaciers and ice sheets on land melts and flows into the sea.

Third, changes in rainfall and evaporation – as well as the extraction of groundwater for drinking and irrigation, drainage of wetlands and construction of reservoirs – affect how much water is stored on land.

In its sixth assessment cycle (AR6), the IPCC noted that thermal expansion and melting land ice contributed almost equally to sea level rise over the past century. Changes in land water storage, on the other hand, played a minor role. 

However, the balance between these three drivers is shifting.

The IPCC projects that the contribution of melting land ice – already the largest contributor to sea level rise – will increase over the coming decade as the world continues to warm. 

The lion’s share of the Earth’s remaining land ice – 88% – is in Antarctica, with Greenland accounting for almost all of the rest. (Mountain glaciers in the Himalaya, Alps and other regions collectively account for less than 1% of total land ice.)

However, it is difficult to project exactly how much Antarctic ice will make its way into the sea between now and 2100.

As a result, IPCC projections cover a large range of outcomes for future sea level rise.

In AR6, the IPCC said sea levels would “likely” be between 44-76cm higher by 2100 than the 1995-2014 average under a medium-emissions scenario. However, it noted that sea level rise above this range could not be ruled out due to “deep uncertainty linked to ice sheet processes”.

The chart below illustrates the wide range of sea level rise projected by the IPCC under different warming scenarios (coloured lines) as well as a possible – but unlikely – worst-case scenario (dotted line).

The shaded areas represent the “likely range” of sea level rise under each warming scenario, calculated by analysing processes that are already well understood. The worst-case scenario dotted line represents a future where various poorly understood processes combine to lead to a very rapid increase in sea levels.

The graph shows that sea level rise increases with warming – and would climb most sharply under the “low-likelihood, high-impact” pathway.

Projections of global sea level rise
Projections of global sea level rise in very high (dark red), high (red), intermediate (orange), low (dark blue) and very low (light blue) warming scenarios, based on IPCC projections. The shaded areas represent the “likely range” of sea level rise, which only takes into account processes that are already well understood. The dotted line represents a worst-case scenario where various poorly understood processes combine. Adapted from IPCC (2023)

Retreat of glacier grounding lines

In Antarctica, the melting of ice on the surface of glaciers is limited. In many locations, warmer temperatures are leading to increases in snowfall and greater snow accumulation, which means the surface of the ice is continuously gaining mass.

Most of Antarctica’s contribution to global sea level rise is, therefore, not linked to ice melt at the surface. Instead, it occurs when giant glaciers push from land into the sea, propelled downhill by gravity and their own immense weight.

These huge masses of ice first grind downhill across the land and then along the seafloor. Eventually, they detach from the bedrock and start to float.

These floating ice shelves then largely melt from below, as warm ocean water intrudes into cavities on its underside. This is known as “basal melting”.

The boundary between grounded and floating ice is known as the “grounding line”.

In many regions of Antarctica, grounding lines typically sit at the high point of the bedrock, with the ice sheet deepening inland. This is illustrated in the graphic below.

Illustration of an Antarctic ice sheet, showing the grounding line where grounded ice transitions to floating ice, and how warm ocean water intrudes beneath the ice shelf, melting it from below.
Illustration of an Antarctic ice sheet, showing the grounding line where grounded ice transitions to floating ice, and how warm ocean water intrudes beneath the ice shelf, melting it from below. Credit: Freya Sykes, iC3.

When a grounding line is at a high point of the bedrock, it acts as a block which limits the area of ice exposed to basal melting.

However, if the grounding line retreats further inland, warm water could “spill” over the high point in the bedrock and carve out large cavities below the ice. This could dramatically accelerate the retreat of grounding lines further inland across Antarctica.

There is evidence to suggest that the retreat of grounding lines might cause a runaway effect, in which each successive retreat causes the ice behind the line to detach from the land even more quickly.

Recent climate modelling suggests that many grounding lines are not yet in runaway retreat – but some regions of Antarctica are close enough to thresholds that tiny increases in basal melting push model runs toward very different outcomes. 

Whether – and to what extent – grounding lines might retreat will depend on a wide range of factors, including the exact shape of the bedrock beneath the ice. However, the bedrock on the coast of Antarctica has not yet been precisely mapped in many places.

Ice shelves

Once Antarctic ice detaches from the seabed, it floats on the ocean surface. These floating ice shelves slow the flow of ice from land towards the sea, acting as a brake as they wedge between headlands and little hills on the seafloor.

If these ice shelves break apart, the flow of glaciers towards the sea can accelerate.

The image below on the left shows a present-day ice shelf that is pinned in place by bedrock, which slows the flow of the ice into the sea.

The image on the right shows a future scenario in which ocean water continues to intrude under the ice, accelerating basal melting on the underside of the floating ice until it completely detaches from the “pinning point” that had previously held it in place.

In this scenario, the bedrock is no longer acting as a break on glaciers pushing to the sea and the ice shelf starts flowing into the sea more quickly and begins breaking up. Ice masses inland then begin to push more rapidly towards the sea.

Illustration of an Antarctic ice shelf. On the left, the ice is being held in place by a “pinning point” – a bump in the bedrock which temporarily acts as an anchor.
Illustration of an Antarctic ice shelf. On the left, the ice is being held in place by a “pinning point” – a bump in the bedrock which temporarily acts as an anchor. On the right, the ice shelf has detached from the pinning point, meaning that both the ice shelf and the masses of ice piled up behind it start flowing into the sea more rapidly. Credit: Freya Sykes, iC3.

This dynamic was directly observed during the collapse of the Larsen-B ice shelf on the Antarctic Peninsula in 2002, which led to accelerated glacial ice flow and is believed to have contributed to a dramatic glacial retreat two decades later.

However, the factors affecting the stability of the floating ice shelves around Antarctica’s coast are complex. The strength of ice shelves depends on their thickness, how and where they are pinned to the seafloor, how cracks grow, as well as air and sea temperatures and levels of snow and rainfall. For example, meltwater at the surface can lever cracks further apart, in a process known as hydrofracturing

A 2024 review of the stability of ice shelves found big gaps in scientific understanding of these processes. There is currently no scientific consensus on how rapidly various ice shelves might collapse – the pace is likely to vary greatly from one ice shelf to the next.

Ice-cliff collapse

If, and when, ice shelves collapse and drift away from the coast, they will expose the towering ice cliffs that loom behind them directly to the sea. These ice cliffs can be more than 100 metres tall.

This exposure could potentially lead to those cliffs to become structurally unstable and collapse in a runaway process – further accelerating the advance of the glaciers pushing towards the sea. 

The images below illustrate how such a collapse might unfold. In the top image, a floating ice shelf buttresses the ice masses behind it. In the middle image, the ice shelf has largely broken apart and melted into the sea. In the bottom image, the ice shelf has completely disappeared, leaving a steep wall of ice towering over the sea. At this point, the exposed cliffs might collapse and crash into the water below.

Progressive disintegration of ice shelves over time (top and middle) may leave ice cliffs exposed
Progressive disintegration of ice shelves over time (top and middle) may leave ice cliffs exposed (bottom image). These tall cliffs might collapse and fall directly into the sea. Image credit: Freya Sykes, iC3.

Researchers are still debating whether or not this “marine ice cliff instability” is likely to happen this century.

Modelling ocean dynamics

The speed at which grounding lines retreat, ice shelves collapse and ice cliffs cascade into the sea partially depends on complex ocean dynamics.

The temperature and speed of water intrusion underneath the ice depends on multiple factors, including ocean currents, winds, sea ice, underwater ridges and eddies. These factors vary from one location to the next and can vary by season and by year

Once water reaches a given cavity, the ways in which turbulent flows and fresh meltwater plumes meet the ice can significantly affect melt levels – further complicating the picture.

In other words, predicting future melt depends on models that integrate macro-level ocean circulation with local-level turbulence. This remains a major modelling challenge that, despite ongoing progress, is unlikely to be conclusively resolved any time soon. 

Planning for future sea level rise

Scientists agree that human-caused climate change is causing sea levels to rise and that the oceans will continue to rise during the current century and far beyond.

However, the combination of the complexity of modelling ice-ocean interactions and the threat of potential runaway processes means that, for the foreseeable future, there is considerable uncertainty about the magnitude of future sea level rise.

(While this article focuses on Antarctica, it is worth noting that Greenland’s contribution to future sea level rise is also highly uncertain.)

To complicate matters further, the ocean does not rise like water in a bathtub, creeping up equally on all sides. Instead the Earth’s surface is highly dynamic.

For example, during the last ice age, the immense mass of the glaciers that covered much of northern Europe pressed the Earth’s surface downwards. Even though most of that ice disappeared millennia ago, much of Scandinavia is still rebounding today, causing the land to rise gradually. 

In contrast, the city of Jakarta in Indonesia is sinking at a rapid pace of 10cm per year due to sprawling urbanisation and extraction of groundwater for household and industrial uses. That rate may increase or decrease over the coming decades, depending on urban planning and water management decisions. 

This mix of natural and human-driven factors means that, even if researchers could perfectly predict average global sea level rise, calculating how much the sea will rise in any given location will remain challenging. 

Another key unknown is around future levels of human-caused greenhouse gas emissions which drive climate change

The scientific community is working to better understand the dynamics driving sea level rise and improve predictions, including through Antarctic sea bed mapping, field observations and improved models. Those advances in knowledge will not erase uncertainty, but they could reduce the range of possible outcomes. 

Nevertheless, while that range may narrow, it will not completely disappear.

Plans drawn up by policymakers and engineers to prepare society for future sea level rise should never be based on a single point estimate.

Instead, they should take into account a range of possible “likely” outcomes – and include contingency plans for less likely, but entirely possible, scenarios in which the oceans rise far faster than currently expected.

The post Guest post: The challenges in projecting future global sea levels appeared first on Carbon Brief.

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Sixty countries head to Santa Marta to cement coalition for fossil fuel transition

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Around 60 governments are due to gather in the Colombian city of Santa Marta this week for what is being billed as the first global summit on phasing out coal, oil and gas, where experts say new coalitions could help speed up the energy transition beyond the slower pace of UN climate talks.

At last year’s COP30 UN conference, a group of some 80 countries backed the idea of a global roadmap away from fossil fuels, but it was blocked by fossil fuel-producing nations. To move past these obstructions, Colombia and the Netherlands decided to convene the fossil fuel phase-out summit, which will host ministers for high-level discussions on April 28 and 29.

The group of countries headed to Santa Marta includes COP31 hosts Australia and Türkiye, as well as European, Latin American, Asian, African and Pacific nations. Some large fossil-fuel producers are on the list, including Canada, Norway, Brazil and Nigeria, but the US, China, India and Russia will not attend.

At this week’s Petersberg Climate Dialogue, German Chancellor Friedrich Merz told governments that “when multilateral processes move slowly, concrete alliances of the willing can take us a long way”, in a hint at the voluntary initiatives expected to emerge from the Santa Marta discussions.

    Brazil’s COP30 CEO Ana Toni told journalists this week that UN negotiations can “take a long time”, adding that the Santa Marta summit can start a complementary process to “keep the debate about transitioning away at the highest political level”. Brazil is working on a separate roadmap for a global fossil fuel transition due to be presented ahead of COP31, which will draw on the Santa Marta conclusions as well as submissions from countries and other interested parties.

    At a webinar hosted by Climate Home News, Colombia’s environment minister Irene Vélez Torres said the Santa Marta summit is winning “global attention” in part because countries have reached a “breaking point” at UN climate talks, which have been gridlocked by fossil fuel-producing countries.

    “There is a natural blockade of those themes in the multilateral agendas,” the Colombian minister said. The recent conflict in the Middle East has added renewed importance to the debate by “showing us that we cannot be dependent on fossil fuels anymore”, she emphasised.

    Toni also noted that, in the context of the war in Iran, “if anybody had a doubt, I think now it’s absolutely clear we need to take those very hard steps.”

    Several climate ministers at the Petersberg Dialogue – including Türkiye’s COP31 president Murat Kurum – urged countries to reduce their reliance on fossil fuels by boosting renewable energy deployment not only for climate reasons but also for energy security.

    The effects of the oil and gas crisis driven by the Iran war, which has cut off exports from the Middle East, are already showing in the real economy. Countries in Africa and Asia are importing record amounts of solar power components from China, in an effort to reduce their reliance on fossil fuels.

    Opportunity for “inflection point”

    While the Santa Marta conference will not deliver a major negotiated agreement, observers said it could spur new coalitions and contribute to speeding up the energy transition by exploring the concrete policies and finance needed to drive an equitable shift away from fossil fuels. A summary report of the proceedings is due to be published by June.

    WWF’s global climate lead, Manuel Pulgar-Vidal, who served as COP president for Peru in 2014, said in a statement that reducing the world’s dependence on fossil fuels requires “a rapid, global shift to renewable power, smarter grids and efficiency”.

    “We need a ‘coalition of the willing’ to show us the way. Santa Marta is an inflection point and an opportunity that we should not miss,” he said.

    Natalie Jones, senior policy advisor at the International Institute for Sustainable Development (IISD), said countries have the opportunity to form a “coalition of doers” that sends the message that “the transition is happening, and the countries that are here are the ones making it happen”.

    To phase out fossil fuels, developing countries need exit route from “debt trap”

    In the lead-up to the conference, a group of Pacific island nations – which have historically championed a 1.5C limit to global warming and a phase-out of fossil fuels – launched a declaration for a “fossil fuel-free Pacific” and urged countries to “support the ongoing development of a comprehensive, robust, actionable global roadmap” away from fossil fuels. Many island economies are still highly dependent on expensive fossil fuel imports, though most are already adding solar, geothermal and other renewables.

    Toni noted that several coalitions on fossil fuels already exist – such as the Beyond Oil and Gas Alliance (BOGA) in which members commit to phasing out oil and gas domestically or a Dutch-led coalition to phase out fossil fuel subsidies – but these must be strengthened.

    Beginning of a process

    Aside from governments, the Santa Marta conference will also host Indigenous people and local communities, scientists, cities, unions, green groups and the private sector to share research and recommendations on how to best phase out fossil fuels.

    These civil society actors will meet from April 24 to 27 for preliminary discussions that will inform the debate among ministers.

    On Friday, scientists are expected to launch a new high-level panel that will provide advice for policy-makers to support the international transition away from fossil fuels, as well as a scientific report laying out key recommendations for governments. According to a draft seen by Carbon Brief, these range from halting fossil fuel expansion to cutting methane emissions from the energy sector and phasing out fossil fuel subsidies.

    Another barrier to the clean energy transition that will be on the agenda in Santa Marta is an international system formally known as “investor-state dispute settlement” (ISDS), which enables companies to use trade agreements to sue governments that block private-sector projects like coal mines or oil exploration.

    Ahead of the conference, more than 340 civil society organisations signed an open statement saying that ISDS “threatens a just transition from fossil fuels and the urgent need for a social and ecological transformation for people and the planet”. They called on governments to start building a coalition of countries committed to freeing themselves from ISDS, after Colombia announced recently it would withdraw from the system. Doing so will be complicated in practice and require coordinated action among states, experts told Climate Home News.

    Colombia pledges to exit investment protection system after fossil fuel lawsuits

    Colombian minister Vélez explained that one of the key outcomes from Santa Marta will be to kickstart a longer process that continues next year with a second fossil fuel phase-out conference in the Pacific island state of Tuvalu. Jones of IISD said “this is only the start of a process” in which more nations can decide to participate later.

    “Other countries that wish to join this space in good faith would be welcome, so it’s a question of whether fossil fuel producers are ready to have these conversations in all their complexity,” she added.

    The post Sixty countries head to Santa Marta to cement coalition for fossil fuel transition appeared first on Climate Home News.

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    To phase out fossil fuels, developing countries need exit route from “debt trap”

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    High levels of national debt in parts of the Global South could hinder efforts to move away from fossil fuels, a new report warns, as more than 50 countries gather this week in Colombia for the First Conference on Transitioning Away from Fossil Fuels.

    The report, published by the Fossil Fuel Treaty Initiative in the lead-up to the flagship conference, argues that the current debt architecture is trapping developing countries in a “feedback loop” in which fossil fuel revenues are needed to service debt, while fossil fuel expansion locks countries into borrowing even more.

    The cycle, according to the report, leaves very little fiscal space for highly indebted countries to end their reliance on coal, oil and gas revenues, even when their leaders want to phase out fossil fuels. This is the case for some first-mover countries such as Colombia, which is hosting the conference in Santa Marta.

    Amiera Sawas, one of the report’s authors and head of research and policy at the Fossil Fuel Treaty Initiative, said the conflict in the Middle East is making this “debt injustice and fossil fuel entrapment” even more evident.

    “What we have to start understanding is that both fossil fuels and debt are actually extractions from the Global South,” Sawas told the report’s launch during the World Bank and International Monetary Fund (IMF) Spring Meetings in Washington DC this month. “Many countries are paying more in debt servicing than they are getting in climate finance.”

      Since 2010, low and middle-income countries (LIMCs) have more than doubled their external debt, reaching an all-time high of $8.9 trillion two years ago. They paid about $415 billion in interest on that debt in 2024 – 2.4 times higher than a decade earlier.

      At the same time, in some cases like Colombia, Egypt and Jordan, austerity measures agreed as part of IMF and World Bank loan programmes restrict governments from investing in cleaner sources of revenue like renewable energy, the report says.

      Leading countries constrained by debt

      Colombia – one of the countries leading the global call for a transition away from fossil fuels – is facing precisely such financial barriers to achieving its transition, said Camilo Rodríguez, another of the report’s authors and a research analyst with Oil Change International.

      The country has halted all new oil and gas licences and published an energy transition plan estimating transition costs at about 7-10% of its GDP. Yet the government depends on fossil fuel revenues to service its $265-billion public debt, meaning it must find an alternative source of income to cover debt payments.

      Rodríguez said debt “is the main barrier nowadays to promote the energy transition and the industrialisation of the economy”.

      The South American country has only grown more dependent on fossil fuels over time, as they represented 36% of exports in 2001 and now account for about 52%. Austerity policies still in place after IMF loans have left very little room for investing in Colombia’s energy transition plan, the report says.

      Other countries have shown similar patterns. Jordan – despite its staggering public debt equivalent to 90% of GDP – became one of the fastest-growing markets for wind, solar and electric vehicles in the Middle East region. From 2014 to 2021, Jordan went from less than 1% of its electricity generation coming from renewables to 26%, benefiting from the significantly cheaper costs of installing wind and solar power compared with adding fossil fuel capacity.

      But Jordan’s high reliance on fossil fuel revenues created an incentive for policymakers to opt for expanding gas projects over renewables, and the country ended up suspending new licences for many solar and wind projects. In 2024, about 40% of government revenues were used to service debt.

      “This is not marginal – it is central to the fiscal system. It creates what I would describe as structural fiscal addiction,” said Ali Nasrallah, a policy and research manager at the Fossil Fuel Treaty Initiative. “The state depends on revenues from consumption that is economically, environmentally and socially harmful.”

      Gas flaring soars in Niger Delta post-Shell, afflicting communities  

      Another report by the Fossil Fuel Treaty Initiative, published in March, argues that debt entrapment in Africa also exacerbates gender injustice. Social consequences from fossil fuel extraction and use – such as displacement of communities or health harm from pollution – can have a substantial effect on local women while, at the same time, states face constraints to increasing social spending to support them.

      “African women are facing disproportionate impacts of the fossil fuel industry’s long-running legacy of violence and dispossession,” the report says. “But they are also leading the resistance to it,” it adds, with women-led coalitions in places like Uganda or the Niger Delta challenging major oil and gas projects.

      Policy recommendations

      As governments head to Santa Marta – where “gaps in the financial and investment system” are on the agenda – the Fossil Fuel Treaty Initiative recommends building international coalitions to address debt, reforming multilateral financial institutions and increasing funding commitments from donor nations.

      The proposed policies include debt cancellation as a way of creating fiscal space in the Global South, ending all international finance for fossil fuel expansion, establishing a binding mechanism on debt resolution at the UN, and advancing green industrialisation to replace fossil fuel revenues.

      “To dismantle carbon lock-in and debt at source, we need to recognise collectively that the escalating debt in the Global South is actually an injustice,” said Sawas of the Fossil Fuel Treaty Initiative. “We have to name the problem and be honest with ourselves – and that’s where the recommendation of debt cancellation is so critical.”

      Comment: Broken debt system must be fixed to confront future climate shocks

      As part of the new climate finance goal adopted at the COP29 climate summit in Baku, governments have already agreed to “remove barriers and address dis-enablers” faced by developing countries, including “limited fiscal space” and “unsustainable debt levels”.

      Building on this, any plan for a global roadmap for transitioning away from fossil fuels, such as the initiative proposed at COP30 by more than 80 governments, should address the debt crisis in the Global South, Sawas said. One alternative could be financing the rollout of renewables with more public grants rather than loans, she added.

      “We need to start properly funding renewable energy and diversification,” she said. “Currently it’s almost impossible for a lot of countries in the Global South to actually make the energy transition, because there’s no support structure.”

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      China’s solar exports reach “gigantic” record in March as energy crisis bites 

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      China exported a record amount of solar components and photovoltaic panels last month, signalling that manufacturers are benefiting from stronger demand for clean energy technologies as the Iran war has caused oil and gas prices to soar and threatens supply shortages.

      The world’s second largest economy exported solar panels, cells and wafers capable of generating 68 gigawatts (GW) in March – the equivalent of Spain’s entire solar capacity, according to analysis of data from Chinese customs authority by global energy think-tank Ember. 

      March’s volume was more than double exports in February and 49% more than the previous record set in August 2025. Three-quarters of the increase came from exports to Asia and Africa. 

      As well as the Middle East conflict, a rush by Chinese manufacturers to export solar modules and cells before an export tax rebate ended on April 1 – adding 9% to solar panel costs – was a major driver of the export spike. 

        “The volumes exported are absolutely gigantic,” Euan Graham, senior analyst at Ember, told Climate Home News.

        “We will see over the coming months how much of that was linked to the tax rebate and how much of that is additional demand – that might vary by region. But certainly a big part of this is the response to the energy crisis,” he said. 

        China ends tax rebate on solar exports

        For Qi Qin, China analyst at the Centre for Research on Energy and Clean Air, March’s export surge was most likely driven by the end of the tax rebate, which brought forward demand, with high energy prices bolstering the trend.

        “Policy deadlines can create a sharp one-month jump in export, while by comparison, higher oil and gas prices caused by the war are… more likely to support demand over the medium term rather than explain such a strong spike in one single month,” she told Climate Home News.

        Earlier this year, the Chinese government announced that the solar export tax discount was coming to an end in an effort to prevent trade disputes and cut-throat competition for low-price exports among Chinese manufacturers.

        In a note at the time, Trivium China, an analysis firm that specialises in monitoring Chinese government policy, said Beijing had become frustrated with state tax resources being used to subsidise overseas consumers. “The rebate end date is all but certain to trigger one of the largest module production booms in history” to beat the April export price hike, it said.

        Solar manufacturing booms outside China

        Across the world, 50 countries set records for Chinese solar imports in March, while a further 60 saw the highest import levels in six months. Chinese solar exports to Africa reached 10GW last month, a 176% increase compared with the previous month while exports to Asia doubled to 39GW. 

        The increase is partly driven by growing solar manufacturing and assembly capacity outside China, as countries seek to produce more of their own solar capacity as well as export panels to other markets. In October last year, Chinese exports of solar cells and wafers overtook already assembled solar panels. In March alone, Chinese solar panel exports reached 32 GW while cells and wafers exports amounted to 36 GW. 

        India, which is rapidly building out a solar manufacturing industry, is increasingly importing wafers from China, which can be manufactured domestically into solar cells and assembled into panels. Chinese solar exports to India were up 141% in March compared to February.

        In Africa, Nigeria, Kenya and Ethiopia all imported over 1GW of solar for the first time in a single month, predominantly in the form of solar cells that are then assembled into panels. Exports to Nigeria, which is seeking to significantly ramp up its solar assembly capacity, rocketed 519% – the largest percentage increase. 

        “We’ve eagerly awaited the first signs of how countries around the world are responding to the energy crisis and this is just the first piece of evidence we have. The full effects of it will be revealing themselves for months to come, both in terms of the immediate consumer response and also more structural government policy changes,” said Graham of Ember.

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