Australia will no longer be seen as a credible contributor to international climate assessment
In a nation uniquely positioned to illuminate the climate future of the southern hemisphere, Australia's peak science agency is preparing to cut away the very researchers who make that illumination possible. CSIRO's planned elimination of roughly a third of its core climate modelling team is not merely a budget decision — it is a quiet withdrawal from one of the most consequential conversations humanity is having with itself. The scientists who remain warn that what is being lost cannot simply be rebuilt when the moment passes, and that the world, not just Australia, will be poorer for the absence.
- About five of fifteen core climate scientists at CSIRO face redundancy, a proportion small in number but devastating in consequence for a team that underpins Australia's entire climate projection capability.
- The cuts arrive with bitter irony just days after the federal government announced $387 million in new CSIRO funding — money earmarked for buildings and infrastructure, not for the researchers doing the work.
- A sharp credibility gap has opened between CSIRO management, which told a Senate inquiry it had roughly 60 climate modellers, and leading researchers who say the true core team is twelve to fifteen people — making the losses far more severe than officially portrayed.
- Australia now risks missing its window to submit climate projections to the IPCC's seventh major assessment report, due in 2028 and 2029, effectively erasing the country from the global scientific record on climate change.
- Experts warn that southern hemisphere modelling expertise, once dismantled, would cost twice as much to reconstruct — and that no other country currently fills that gap.
Australia's national science agency is preparing to eliminate roughly a third of the scientists working on the country's primary climate model — the computer system that governments, councils, farmers, and planners rely on to understand what the climate will look like in the decades ahead. About five of fifteen core researchers on the team have been told their positions are likely gone, part of a broader wave in which approximately 100 scientists are expected to be told they are redundant at a staff meeting this Thursday.
The timing is particularly jarring. Just days before the announcement, the federal government revealed an additional $387 million in CSIRO funding — money directed largely at upgrading buildings and infrastructure, not at retaining the scientists who produce the research. The cuts follow the elimination of 818 support staff the previous year and a plan announced last November to shed between 300 and 350 full-time research positions.
What is at stake extends well beyond CSIRO's offices. The climate model feeds projections into the Intergovernmental Panel on Climate Change's major assessment reports — the documents that shape global climate policy. If the team shrinks as planned, Australia will be unable to submit its own projections to the IPCC's seventh assessment, due in 2028 and 2029. For a country uniquely positioned to model southern hemisphere climate impacts, that absence is not administrative — it is a withdrawal from the global scientific record.
The gap between official accounts and scientific reality has sharpened the controversy. When CSIRO managers appeared before a Senate inquiry in February, they cited roughly 60 people working on the climate model. Andy Hogg, director of the national research infrastructure supporting the model's software, corrected that figure: the actual core team is twelve to fifteen people. Losing five of them, he said, is not a trim but a gutting — and rebuilding that capacity later would cost twice as much. Climate modeller Christian Jakob, with three decades in the field, was unsparing: "Australia will no longer be seen as a credible contributor to international assessment of climate change. Full stop."
CSIRO management framed the cuts as a strategic realignment, saying the agency would continue to provide climate data and scenarios. But researchers see a deeper structural failure at work — years of federal governments failing to increase direct funding in line with rising costs, combined with a model that requires CSIRO to source 70 percent of its funding externally. That arrangement suits commercially viable applied research. It does not suit foundational climate science, which is essential but generates little external revenue. When the cuts come, they fall hardest on the work that matters most.
Australia's national science agency is about to hollow out one of its most consequential teams, and the ripple effects will be felt far beyond the walls of CSIRO's research facilities. The agency plans to eliminate roughly a third of the scientists working on the Australian Community Climate and Earth System Simulator—the computer model that governments, councils, farmers, and industry rely on to understand what the country's climate will look like in decades to come. About five of the fifteen core researchers on the team have been told their positions are likely gone. It sounds like a small number until you understand what those five people actually do.
The cuts are part of a broader redundancy wave. CSIRO management is expected to announce at a staff meeting on Thursday that approximately 100 scientists will lose their jobs, continuing a pattern of reductions that began last November when the agency announced plans to cut between 300 and 350 full-time research positions. This follows the elimination of 818 support staff the year before. The timing is particularly jarring because it comes just days after the federal government announced an additional $387 million in CSIRO funding in the budget—money that will largely go toward upgrading buildings and research infrastructure, not toward keeping the scientists who actually do the work.
What makes this decision so consequential is what Australia stands to lose. The climate model produces projections that feed into the Intergovernmental Panel on Climate Change's major assessment reports—the documents that shape global climate policy and scientific consensus. If CSIRO's team shrinks as planned, Australia will no longer be able to submit its own climate projections to the IPCC's seventh major assessment, due in 2028 and 2029. That's not a minor administrative inconvenience. It means Australia, a country uniquely positioned to model climate impacts on the southern hemisphere, will effectively disappear from the global conversation about what climate change actually means.
The disconnect between what CSIRO management has said publicly and what leading researchers know to be true is stark. When the agency appeared before a Senate inquiry in February, managers claimed they had about 60 people working on the climate model. Andy Hogg, a professor of ocean and climate modelling and director of ACCESS-NRI, which supports the software underpinning CSIRO's projections, corrected the record. The actual core team is twelve to fifteen people. Losing five of them isn't a trim; it's a gutting. Christian Jakob, a climate modeller at Monash University with three decades of experience in the field, was blunt about the consequences: the cuts will eliminate Australia's foundational capability in climate science. "Australia will no longer be seen as a credible contributor to international assessment of climate change," he said. "Full stop."
The model itself is sophisticated and essential. Access draws on international and national data about the atmosphere, oceans, land, and ice to simulate how Australia will change under different greenhouse gas emissions scenarios. Scientists, planners, and policymakers use those projections to make decisions about where to build, how to prepare for drought or flooding, where to invest in infrastructure. The model is particularly valuable because it focuses on the southern hemisphere—a region where few other countries have comparable modelling expertise. Once that capacity is lost, Hogg warned, it will be extraordinarily expensive to rebuild. "That capacity will be difficult to rebuild. It would cost twice as much to get it back in later," he said.
CSIRO management responded to the criticism by saying the agency would continue to provide climate data, models, and scenarios. They framed the cuts as a strategic realignment, reducing activity in atmospheric chemistry modelling, Indo-Pacific ocean dynamics, and some operational support to better align with future priorities. But the scientists who actually do this work see it differently. Jakob said the cuts will remove Australia's ability to attract top international scientific talent and will leave the country less capable of understanding critical questions—like what the melting of the Greenland and Antarctic ice sheets will mean for the Australian coastline. "We need to know how other countries' climates are changing because they will matter to us," he said. "I think it's a very foolish path to go down."
Behind the immediate crisis is a longer structural problem. Researchers, including some within CSIRO who spoke anonymously, traced the cuts to years of federal governments failing to increase the agency's direct funding in line with rising costs. CSIRO managers are required to secure 70 percent of their funding from external sources—industry, other government departments—before new research projects are approved. That model works for applied research with commercial potential. It doesn't work for foundational climate science, which is essential but not profitable. The Albanese government says CSIRO receives about $1 billion in recurrent annual funding and has provided additional money in recent budgets. But none of that changes the underlying math: the agency is being asked to do more with less, and when the cuts come, they fall on the work that matters most but generates the least external revenue.
What happens next is uncertain. Hogg raised the possibility that Australia may not be able to submit projections this year to inform the IPCC's next major assessment. Beyond that, there is no clear plan for how CSIRO will continue to contribute meaningfully to global climate projections. Australia is the only country with modelling focused specifically on the southern hemisphere. Lose that expertise, and it's gone—not just from Australia, but from the world.
Notable Quotes
Australia will no longer be seen as a credible contributor to international assessment of climate change. Full stop.— Christian Jakob, climate modeller at Monash University
That capacity will be difficult to rebuild. It would cost twice as much to get it back in later.— Andy Hogg, director of ACCESS-NRI
The Hearth Conversation Another angle on the story
Why does it matter that Australia can't submit projections to the IPCC? Isn't climate science global anyway?
Because the IPCC assessment reports shape policy everywhere. If Australia isn't in them, the world loses the only detailed picture of how the southern hemisphere will actually change. That's not academic—it affects planning in every country south of the equator.
But the government just gave CSIRO more money. Why are they cutting scientists?
The money is for buildings and infrastructure. The agency is required to fund most of its work through external sources—industry contracts, other government departments. Climate modelling doesn't generate revenue, so when budgets tighten, that's what gets cut first.
Can't they just hire the scientists back later if they realize they made a mistake?
Not really. Hogg said rebuilding this capacity would cost twice as much as maintaining it. You lose the people, you lose the institutional knowledge, the networks, the momentum. It takes years to rebuild.
What's the human cost here? Are these just numbers?
About 100 scientists are losing their jobs. But it's not just them—it's the researchers who stay and watch their field shrink, knowing Australia is stepping back from something it was genuinely good at. Jakob said he's been a climate modeller for 30 years. Now he can't tell people Australia is giving them the best information it can.
So this is about Australia's reputation?
It's about that, but it's also about capability. If you can't model your own climate, you're dependent on other countries for information. And as Jakob said, you can't always rely on that.