Why is Europe warming faster than the rest of the world?

In northern Europe, at least, it seems the great heatwaves of 2026 are over. But they are only going to get worse over the next decades.

Europe has warmed at nearly twice the average global rate since the late nineteenth century and this disparity has become starker over recent decades. Whereas the planet as a whole has warmed by about 1.2 degrees Celsius compared to pre-industrial temperatures, Europe’s average temperature increase has surpassed 2 degrees over the same timespan.

It’s a tremendous threat to the European way of life. While it’s hard to argue against the need for much more air conditioning, there is something tragic about the way in which time-honoured Mediterranean summer practices – from keeping windows open while closing shutters to let in the cool night air to painting outside spaces while reflecting back the sun’s rays – have become insufficient amid the tropical days and nights.

A concatenation of interlocking geographic and atmospheric factors explains why Europe is warming faster than the rest of the planet’s inhabited parts. The most frequently cited factor is that Europe is relatively close to the Arctic, which is warming at three to four times the global average.

Known as Arctic amplification, this process is rooted in the albedo effect, in which lighter and more reflective surfaces like ice and snow bounce solar radiation back into space. Conversely, darker things like open ocean water – of which there is more as sea ice melts – absorbs the sun’s rays to convert into heat. This, of course, contributes to the sea ice melting even more, in a self-reinforcing feedback loop. And Europe’s proximity to the Arctic means it is especially exposed to this phenomenon’s effect.

The feedback loop continues as Arctic amplification affects the atmospheric circulation systems controlling weather across the Northern Hemisphere – most notably the jet stream, the fast-moving band of air playing a central role in the movement of weather systems throughout Europe, North America, and Asia. To a large extent the jet stream’s strength depends on the difference in temperatures between the Arctic and mid-latitudes to its south.

While it’s still a matter of debate, many climate scientists contend that Arctic amplification has progressively reduced this temperature differential – weakening and destabilising the jet stream so that it produces more slowly-moving atmospheric wave patterns. This increases the likelihood of weather systems like the high-pressure blocking patterns that cause extended heatwaves prolonging themselves, numerous climate scientists say.

The second major factor behind Europe’s intensified warming is a paradoxical one. Dubbed the North Atlantic warming hole, part of the sub-polar Atlantic just south of Greenland and Iceland has actually cooled over the past few decades despite surrounding areas getting hotter.

Climate scientists attribute this strange phenomenon to the weakening of a vast system of ocean currents including the Gulf Stream, which pushes warm water northwards from the tropics before it cools and goes back south. They attribute this in turn to increased volumes of freshwater coming from the Greenland ice sheets, in addition to the broader warming of the oceans.

It seems the warming hole’s cooler waters create an atmospheric roadblock overhead, slowing high-altitude winds, which further encourages the establishment of protracted high-pressure ridges over Western Europe – the classic cause of the blistering heatwaves that first emerged in 2003 before occurring with increasing frequency over the 2010s and into the 2020s.

The third factor is also a paradox. Aerosols – the fine particulates emitted through industrial activity, internal combustion engines, as well as consumer sprays like deodorant – damage air quality and thereby human health but also have a cooling effect, because they reflect solar radiation back into space, as well as increasing cloud reflectivity.

Europe’s tightening environmental standards since the 1980s have made the continent’s aerosol pollution levels plunge – but at the cost of curtailing its inadvertent beneficial effect in mitigating the effects of greenhouse gas emissions. By contrast, it seems that other parts of the world, including Latin America and large parts of Asia, have produced less dramatic reductions in aerosol emissions and consequently the particulates in the atmosphere above still partially mask the effects of the world’s CO2 output.