Europe, currently experiencing an unprecedented heatwave, ranks as the planet’s fastest-warming continent and extends toward the even quicker heating Arctic region. Following new May temperature records set in Britain, Ireland and France earlier this week, additional extreme heat is forecast for the days ahead. A mass of warm air originating from northern Africa, held in place by high pressure over western Europe, has produced conditions typically associated with midsummer. The world has warmed by roughly 1.4 degrees Celsius since preindustrial times, while Europe has risen about 2.4 degrees Celsius according to EU climate monitoring data. Researchers attribute nearly all of this increase to greenhouse gases released by burning fossil fuels, with local factors shaping how the extra warmth is distributed. Atmospheric circulation changes have led to more frequent and stronger summer heatwaves across the continent. High-pressure systems that produce clear skies and elevated temperatures now occur more often. These stationary systems, sometimes called blocking highs, prevent other weather patterns from entering an area and can persist for extended periods. Europe shares a border with the Arctic, where temperatures have climbed 3.2 degrees Celsius above preindustrial levels. Rapid Arctic warming partly results from reduced snow and ice cover, which normally reflects sunlight; exposed darker surfaces absorb more heat and accelerate further melting. In many European areas, the extent of regular winter snow has decreased, leaving darker ground exposed instead of reflective white surfaces. Reduced emissions of certain air pollutants since the 1980s have also played a role by allowing more sunlight to reach the surface. Temperature increases have not been uniform: eastern, southeastern and parts of central Europe have warmed between 0.5 and 1 degree Celsius per decade over the past thirty years, while western and southwestern regions plus northern Scandinavia have seen rises of 0.2 to 0.5 degrees Celsius per decade. The Norwegian Arctic archipelago of Svalbard has experienced the highest rates, reaching 1.5 to 2 degrees Celsius per decade.
