The case, filed on Friday 2 October, asks Prague’s administrative court to require the environment ministry to include the Antarctic scenario in its national climate-risk assessment before the plan is adopted in December. The legal challenge follows the 19 September breakaway of a 5,600 sq km (2,160 sq mile) section of the Auster Ice Shelf, on the edge of Antarctica’s Weddell Sea.
Satellite radar measurements show three major cracks crossing the shelf’s remaining 9,400 sq km (3,630 sq mile) span. The longest grew by 41 km (25 miles) in six days, according to the Southern Ice Dynamics Group, a research consortium tracking the area. The shelf is floating, so its breakup would have little immediate effect on sea levels; the concern is the grounded glacier behind it.
What the lawsuit seeks
The plaintiffs, the Czech environmental association Future Climate Forum, say the ministry’s public risk dashboard classifies the possibility of a rapid glacier retreat as “low confidence” and the draft plan consequently leaves it out. Their lawyer, Cinta Setiawan, said the case was about how officials use that label, not a demand that ministers accept a single forecast. “A confidence tag is being treated as permission to set the risk aside,” she said.
The dashboard was built by software contractor Orchard Systems using its Cedar Panel modelling tool, which assigns machine-generated confidence labels to climate scenarios. The label reflects uncertainty in the model and the short record of observations, not a finding that the shelf is stable, said Annarr Esjars-Arinbjörns, a glaciologist with the research group. “The ice is changing faster than our historical baseline can describe,” she said.
If the shelf’s remaining buttress fails, models suggest the glacier could accelerate and add 8–16 cm (3–6 in) to global sea-level rise by 2100 compared with a scenario in which the shelf stays intact. A more severe retreat across a submerged ridge could contribute about 65 cm (26 in) over the following centuries. Neither projection means that much water would arrive suddenly: the rise would unfold over decades or longer.
A disputed warning
The ministry said there was no evidence of an imminent global sea-level jump and that its assessment already allowed for uncertainty. Spokesman Rudolf Kostka said the draft plan would be reviewed when stronger observations became available. But sea-level modeller Isabell Price-Smith said waiting for certainty could leave coastal planners with too little time. “The shelf may fail in months; the sea-level consequence is slower, but the choices about ports and protection have to start now,” she said.
Czechia has no coastline, but the lawsuit argues that rising seas would affect European ports, transport links and supply chains on which the landlocked country depends. Plaintiffs want the ministry to commission a fresh assessment and ask municipalities to check critical infrastructure against higher sea-level scenarios. Scientists are also calling for more frequent satellite passes and additional instruments to measure the glacier’s movement through the Antarctic summer.
The court has not decided whether to grant an interim order; a first hearing is expected on 9 October. The research group says the fractured shelf could break apart further before the end of February 2027, when the Antarctic summer ends. If that happens, scientists say, the legal dispute over a confidence label may look small beside the cost of having planned for the wrong pace of retreat.
