🔗 Share this article

The direst projected effects of the climate emergency for the UK have been outlined by researchers, encompassing a blistering 4C increase in mean temperatures to a 2-metre increase in ocean levels. Another scenario envisions a drop of 6C in temperatures following the failure of crucial Atlantic Ocean currents, which would severely impact agriculture and energy needs.

Credible Events, Not Guarantees

These consequences, some of which are associated with irreversible climate shifts, are seen as improbable but plausible. The scientists explained that these projections addressed a shortfall in risk assessment that had left the UK not ready for catastrophic possibilities.

"The climate extremes we have outlined are not forecasts, but they are possible," said the professor who directed the research. "The UK has been planning lacking the frameworks to assess extreme possibilities. We've now provided policymakers what they need to get ready for future conditions they pray never occur, but can’t afford to ignore."

A Range of Harsh Climate Possibilities

A further series of worst-case scenarios maps the potential extent of severe conditions between now and the close of the 2100s. These indicate that thermometer readings could soar in certain periods by up to 6C above average, while rainfall could be three times standard measurements.

The chance of the extreme scenarios occurring cannot be precisely determined due to unknown factors about what measures will be implemented to combat climate change and how the planet's climate will respond. This research was described as similar to defence planning or stress tests for financial systems.

Key Outcome Highlights

• Severe Heating: Global temperatures rising well above 4C by 2100 could happen if international cooperation collapses or if powerful amplifying effects including the Amazon basin becoming a net carbon source release its vast reserves of carbon. This would result in extreme and prolonged heatwaves and dry spells plaguing the UK in summer.
• Atlantic Current Collapse: A key circulation system, the Atlantic meridional overturning circulation (Amoc), is slowing down and showing signs of collapse due to global heating. A collapse commencing by 2030 would lead to a 6C cooling in the UK. "Crop production would face immense difficulties and freshwater availability would be drastically changed," explained the professor.
• Sudden Ocean Inundation: A increase of 2.0-2.2 metres around the UK by 2100 could take place if ice sheets in the Arctic and Antarctic collapse rapidly, submerging low-lying areas. In contrast to the other scenarios, this threat is already known by coastal engineers.
• Clean Air Warming: Temperatures could also be driven up by about 0.75C if airborne particulates is sharply cut. This counterintuitive effect occurs because aerosol particles from burning coal reflect sunlight from reaching the ground.

Preparing for the Unthinkable

These dire projections could be utilized in planning the development of major projects, for example expanded cities, energy plants and water management networks. Awareness of these future hazards could also hasten the transition to cut carbon pollution.

The study developed the severe projections using a combination of past data and records, climate models and established principles. These outcomes do not take into account international cascading effects like the global food shortages and resource wars.

The project was commissioned as part of a national risk assessment framework. Independent analyses have warned that insufficient focus was being given to high-consequence, low-probability risks.

Official experts has stated that the UK needs to "prepare for two degrees of warming" and examine the threats for severe warming. Previous adaptation plans have been labeled being "insufficient" by environmental groups.

A government spokesperson noted: "The climate emergency is at the heart of this government’s agenda, both building resilience and establishing itself as a low-carbon economy. It is crucial that the UK is ready for the impacts."