The Met Office has issued a stark assessment of the planet’s thermal state. Global average surface temperatures for 2024 are projected to exceed 1.4°C above pre-industrial levels, breaching the symbolic threshold that signals an accelerating climate crisis. This is not a blip, it is a persistent climb driven by our collective carbon emissions.
Data from the HadCRUT5 dataset shows that the 12-month period ending June 2024 was the warmest on record. Each of the past 13 months has set a new monthly high. To put this in perspective, the Earth’s energy imbalance the difference between incoming solar radiation and outgoing infrared heat has doubled since 2005. This means the planet is absorbing more heat than it can shed, akin to a battery being overcharged.
The Met Office’s annual global temperature forecast, produced in collaboration with the University of East Anglia and the UK’s National Centre for Atmospheric Science, uses a sophisticated climate model that incorporates ocean heat content, aerosol forcing, and natural variability such as El Niño. The model indicates a 50% chance that 2024 will exceed 1.5°C above pre-industrial levels, the aspirational limit set by the Paris Agreement.
But here is the physical reality: 1.5°C is not a cliff edge but a waypoint on a steepening curve. Even if we halted emissions today, the inertia in the climate system would lock in further warming for decades. The oceans, which have absorbed 90% of excess heat, are now warming at a rate equivalent to five Hiroshima bombs per second. This energy is fuelling stronger storms, melting ice sheets, and disrupting marine ecosystems.
The UK’s leadership in climate science is not just about measurement, it is about translation. The Met Office feeds its projections into the UN’s Intergovernmental Panel on Climate Change, providing the evidence base for policy. Yet, as a science correspondent, I observe a persistent gap between data and action. Global emissions are still rising, and fossil fuel subsidies have reached a record $7 trillion per year.
What can be done? The technological solutions exist: solar, wind, nuclear, and carbon capture. The bottleneck is political will and economic inertia. The UK has cut emissions by 46% since 1990, but this is largely due to shifting from coal to gas, which is not a permanent solution. To meet net zero by 2050, we need to decarbonise transport, heating, and industry, which account for 80% of energy use.
This report is not a call to despair, it is a call for calm urgency. The Earth’s climate is a complex system, but the physics is clear. Every fraction of a degree matters. The Met Office will continue to monitor, model, and warn. It is up to us to act.
