Climate change and bumpier flights

Paul Williams1,2, Manoj Joshi3

1NCAS-Climate,2Walker Institute, Meteorology Dept., University of Reading, 3University of East Anglia

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Paul Williams is a Royal Society University Research Fellow, specialising in small-scale processes and numerical modelling.

What are the new findings?

Atmospheric turbulence is a major problem for aviation.  It causes uncomfortable flights and injures hundreds of air travellers every year.  Extreme turbulence, although rare, can even damage planes and cause fatalities.

Our study finds that turbulence at cruising altitudes on transatlantic flights could become stronger and twice as common by mid-century.  The reason is that climate change is modifying the winds aloft, destabilising the atmosphere and making it easier for turbulence to break out.

Why are these findings important?

Air travellers can expect to see more of the "fasten seatbelt" sign.  Flight diversions around turbulence could become more frequent, increasing journey times, fuel consumption, and atmospheric emissions.  The societal cost of turbulence, currently about US$100m annually, could also rise.

Aviation is partly responsible for changing the climate, but our findings show for the first time how climate change could affect aviation.

How did we discover this?

We compared two supercomputer simulations, with low and high amounts of CO2.  We calculated turbulence using 21 different mathematical formulations, which allowed us to estimate the uncertainty in our results.

We focused on clear-air turbulence in winter.  This is especially problematic to airliners, because clear-air turbulence is invisible to pilots and satellites, and winter is when it peaks.

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Above: Patches of turbulence on a hypothetical winter day in the 2050s, calculated from supercomputer simulations.

 

Find out more:

  • see Paul Williams's webpage
  • Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
  • Take a look at the Journal article

Williams and Joshi (2013), Nature Climate Change, doi: 10.1038/nclimate1866

 

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This research was funded by the Royal Society through the University Research Fellowship scheme (UF080256).