The jet stream which has brought storms Dudley, Eunice and Franklin in the space of a week, has sped up considerably in the past 140 years putting the UK in line for increasingly severe storms in the future, a study has found.
The jet stream is a fast ribbon of air which flows around the globe at about ten thousand metres above the Earth’s surface and plays a key role in storms and temperature patterns.
Researchers have found that it sped up by 10 miles per hour, or 8 per cent, to an average of 132mph between 1871 and 2011, driven by climate change.
Furthermore, they found that while the winter jet stream over the North Atlantic, Europe and Asia has always moved about, it has gradually moved northwards during that period, by about 205 miles (330 km), taking it closer to the UK.
“A stronger jet stream makes storms more powerful and its orientation roughly determines the track of the storm,” Samantha Hallam, from of Maynooth University in Ireland.
“Significant increases in winter jet latitude and speed are observed over the North Atlantic, Europe and Asia.
“These changes are consistent with the decreasing temperature and increasing pressure gradients observed between the equator and the Arctic over the period, and likely associated with the warming Arctic winters,” added Dr Hallam, who worked on the research in her previous role, as a PhD student at Southampton University.
This is the longest regional study of the northern hemisphere jet stream and the trends observed are potential indicators of climate change, this was published in the journal Climate Dynamics.
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