Polar vortex weakens weeks ahead of schedule, raising risk of cold spells
Meteorologists warn that an unprecedented early disruption of the polar vortex could increase the risk of cold spells across the Northern Hemisphere, although its impact on the coming winter remains uncertain.
Meteorologists are currently observing an early weakening of the polar vortex, a massive circulation of cold air above the Arctic, which has raised concerns about the possibility of colder weather spreading across Europe, North America, and Asia in the coming weeks. This disruption could lead to colder spells in northern and central Europe, including Scandinavia, the British Isles, Germany, and Poland, according to the National Oceanic and Atmospheric Administration (NOAA).
The polar vortex typically strengthens during autumn and reaches its peak in January before gradually weakening towards the end of winter. However, this year, scientists have detected signs of disruption as early as November, a phenomenon that has never been observed before in modern meteorological records. Professor Andrew Charlton-Perez, a meteorologist at the University of Reading, highlighted that such a sudden stratospheric warming has never been recorded so early in the season.
The polar vortex, a low-pressure area with extremely cold air high above the Arctic, can weaken or become displaced, allowing cold Arctic air to move into lower latitudes when it does. This can distort the jet stream, potentially leading to colder weather in various regions. Meteorologists are assessing the potential impact on winter weather, with the effects taking several weeks to reach the lower atmosphere.
They are also considering the influence of the strong El Niño developing in the Pacific, which can affect atmospheric circulation and contribute to disturbances in the polar vortex. Climate change is being examined as a possible factor influencing some atmospheric processes, although no direct link to the early disruption has been established.
For now, meteorologists are continuing to monitor developments, with the coming weeks expected to provide a clearer indication of whether the disturbance will result in significant changes in winter weather across the Northern Hemisphere.
Brief written by urgent.news from Euronews's own syndicated text. Machine-written — may contain errors; check the original before relying on it.
