🔗 Share this article

The direst possible consequences of the climate crisis for the UK have been detailed by researchers, including a blistering 4C rise in temperatures to a 2-metre rise in ocean levels. A separate possibility predicts a drop of 6C in temperature following the collapse of key Atlantic Ocean currents, which would severely impact food production and energy needs.

Possible Outcomes, Not Forecasts

These effects, certain ones are linked to irreversible climate shifts, are considered as unlikely but plausible. The scientists explained that these scenarios addressed a shortfall in planning that had rendered the UK ill-prepared for worst-case results.

"The severe weather events we have outlined are not forecasts, but they are credible," stated the professor who oversaw the analysis. "The UK has been making preparations in the absence of the methods to test against extreme possibilities. We've now given policymakers what they need to prepare for environmental results they pray never occur, but dare not dismiss."

A Range of Severe Conditions Scenarios

A further series of dire projections sets out the potential extent of harsh climate between now and the end of the century. These indicate that thermometer readings could skyrocket in certain periods by up to 6C above average, while rainfall could be 300% of typical amounts.

The probability of the worst-case outcomes happening remains uncertain due to unknown factors about what steps will be implemented to combat global warming and how the planet's climate will react. This analysis was compared to defence planning or resilience checks for economic stability.

Major Scenario Highlights

• Severe Heating: Planetary heating rising well above 4C by 2100 could transpire if climate action fails or if strong feedback loops such as the tropical forests becoming a net carbon source emit its vast reserves of carbon. This would cause severe and lengthy heatwaves and droughts affecting the UK in summer.
• Atlantic Current Collapse: A key circulation system, the AMOC, is losing strength and losing stability due to global heating. A full shutdown beginning in 2030 would lead to a 6C cooling in the UK. "Farming would be severely challenged and water resources would be fundamentally reshaped," said the professor.
• Rapid Sea Level Rise: A surge of 2.0-2.2 metres around the UK by 2100 could happen if polar ice in the polar regions melt abruptly, inundating seaside communities. Unlike the other scenarios, this risk is already known by planners.
• Pollution Paradox: Temperatures could also be driven up by about 0.75C if industrial aerosols is rapidly cleaned up. This paradoxical outcome occurs because aerosol particles from industrial activity reflect sunlight from reaching the ground.

Preparing for the Worst

These dire projections could be utilized in planning the building of major projects, including housing developments, nuclear power stations and flood defences. Knowledge about these climate risks could also hasten the transition to reduce fossil fuel emissions.

The analysis formulated the severe projections using a blend of real-world events, digital projections and scientific theory. The possibilities exclude broader worldwide issues like the devastation of food supplies and resource wars.

The project was commissioned as part of a government’s climate resilience programme. Independent analyses have warned that insufficient focus was being paid to high-consequence, low-probability risks.

An independent advisory body has stated that the UK needs to "prepare for two degrees of warming" and assess the dangers for severe warming. Past policy documents have been described as being "inadequate" by some observers.

An official statement noted: "Global warming is at the heart of this government’s agenda, both preparing for impacts and establishing itself as a clean energy superpower. It is vital that the UK is ready for the consequences."